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  • भारत सरकार
  • GOVT. OF INDIA
  • श्रम एवं रोजगार मंत्रालय
  • MINISTRY OF LABOUR AND EMPLOYMENT
  • खान सुरक्षा महानिदेशालय
  • DIRECTORATE GENERAL OF MINES SAFETY

Application

Approval Letter View

Approved No :- MECH-142101/2021/13

Letter No: MECH (HQ)/142101/2021/13                     Dhanbad,                          Date : 19/03/2021

DGMS APPROVAL NO. MECH-142101/2021/13

From

Director General of Mines Safety
Directorate General of Mines Safety,
P.O & Distt: Dhanbad - 826 016.

To

K PRASADA RAO, ANDHRA PRADESH HEAVY MACHINERY AND ENGINEERING LTD,
KONDAPALLI KRISHNA DISTRICT, VIJAYAWADA, Andhra Pradesh 521228

Subject: Renewal of approval for Man Riding Chair lift System, Manufactured by M/s. APHMEL installed from 1DS / 16-17L to 1DS / 73L of Seam G-III Bottom  of Bagdewa UG Mine in Korba Area of M/s. SECL.

Sir,

Please refer to your online application vide ID: 30622 dated 24.09.2020 and subsequent correspondences on the above cited subject.

I, in exercise of the powers conferred upon Chief Inspector of Mines (also designated as Director General of Mines Safety) under Regulation 208(3) of the Coal Mines Regulations 2017, hereby renew the approval issued vide this Directorate’s Letter No. Mech (HQ)/ APP/ MRCL/ APHMEL/ 1308 dated 13.03.2016 for Man Riding Chair lift System, Manufactured by M/s. APHMEL installed from 1DS / 16-17L to 1DS / 73L of Seam G-III Bottom  of Bagdewa UG Mine in Korba Area of M/s. SECL, for a period of five years i.e. up to 16.10.2025 subject to the conditions mentioned in the approval Letter No. Mech (HQ)/ APP/ MRCL/ APHMEL/ 1308 dated 13.03.2016 and annexure overleaf.

The application for regular approval shall be made online at least three months before the date of expiry of this approval.

 

Your Sincerely,
(PRABHAT KUMAR)
Director General of Mine Safety
Date : 19/03/2021

 

Annexure -A

1.0 Design, construction and safety provisions of the Man Riding Chair Lift System:

Every part of the system shall be of good construction, suitable material, of adequate strength and free from visible defect and shall be properly maintained. Every Man riding chairlift system and each of the accessories thereof shall so far as is practicable be constructed of non-inflammable material and any inflammable material, if used, shall be shrouded with a suitable non-inflammable covering. No part of the equipment/ machine (e.g., fan hubs, fan blades) shall be made of light metals or its alloys which causes incendive sparking due to impact or friction. The Chair-lift System shall fully conform to the design and the details submitted in the drawing nos. as per Annexure-C. Any modification made hereafter in the Chair-lift System shall be immediately communicated to this Directorate and its approval shall be obtained.

Drive station:

1.1 The drive station shall be firmly connected to a rigid foundation and shall be so designed, constructed and maintained that with the power provided, the transportation of persons can be carried out with ease, regularity and safety.

1.2 The drive station consisting of a drive unit, electrical systems, power pack and wire rope etc. shall not be a source of danger to the passengers and chair lift operator. The passenger entrance shall not cross the path of the travel without ensuring proper safety, to avoid any possible accident to the passengers.

1.3 A suitable provision shall be made at prime mover or its controls to prevent reverse motion of prime mover.

1.4 Drive station shall be fitted with speed indicator at a suitable location for easy monitoring by operator.

1.5 Drive station shall be provided with a suitable over speed tripping device.

1.6 The chair lift operator shall be located such that he will have clear view of the driving machinery and instrumentation. The controls and communicating devices will be within his reach.

1.7 Adequate and suitable type fire extinguishers shall be kept available at the drive station.

1.8 A suitable fencing and gate with interlock to stop the system shall be provided at drive station to avoid entry of unauthorized persons.

Power pack:

1.9 The Hydraulic power pack shall be consisting of suitable variable displacement hydraulic pump with seals compatible with the fire resistant hydraulic fluid and directly driven by adequately rated electric motor with cooling system.

The following safety features shall be provided in the hydraulic power pack:

  1. Pressure relief valves to relive pressure beyond rated working pressure
  2. Tripping at low oil level
  3. Tripping on low oil pressure
  4. Tripping if working oil temperature rises beyond 85°C
  5. Tripping if oil filter is choked
  6. Tripping on low booster pressure

1.10 The design of power pack shall be such that the speed of the rope can be adjustable from “zero to 3.0 (three) meter/second maximum”.

1.11 A suitable hydraulic device with locking arrangement shall be provided to regulate the speed of the rope and shall be capable of maintaining the constant speed of the system.

1.12 A suitable hydraulic device shall be provided such that the variation of the speed of rope during acceleration or deceleration (start/stop) shall not give any sign of discomfort to the passengers.

1.13 An efficient cooling system shall be provided to maintain the hydraulic oil temperature within limits.

Drive unit and sheave:

1.14 The drive unit shall be made of steel of adequate strength, consisting of drive sheave driven by high torque hydraulic motor and provided with spring applied hydraulically released (SAHR) brake for smooth, efficient and safe operation of the system. The drive unit shall be mounted on robust and rigid base frame made of steel section of adequate strength and suitably fenced.

1.15 The diameter of driving sheave shall be not less than 80 times the diameter of wire rope. Drive sheave shall be provided with liner made of bronze and rubber/polyurethane material, having adequate coefficient of friction. The diameter of return sheave shall not be less than the distance between two ropes. Return sheave shall be provided with liner made of rubber/polyurethane material.

1.16 The sheave, on which carrying rope is supported, shall be made of carbon steel casting and conforming to IS 1030-1998 or its revised version. They shall be mounted on suitable bearings with proper locking.

1.17 The speed of rope shall be maintained constant irrespective of any load conditions. The variation of speed in the most unfavourable conditions shall not exceed ±5 percent.

1.18 Power to drive sheave shall be stopped automatically when any brake is applied or   any tripping device is activated.

1.19 The contact angle of the rope on the drive sheave shall be designed such that even in most unfavourable combination of circumstances the required power is transmitted to the rope.

1.20 The material specification of sheave are given at Annexure-B

Brakes:

1.21 The system shall be provided with service brake and an emergency brake. Each of these brakes shall be able to ensure the safe stopping of the system under most unfavourable conditions of loading.

1.22 The service brake shall be inbuilt in the closed loop hydraulic system consisting of the high torque hydraulic motor and the swash plate type pump. The service brake shall be capable of resisting the outside forces actuated by the loaded chair lift system on the drive sheave.

1.23 The emergency brake shall be a spring applied hydraulically released (fail safe type). In case of any failure in the system, springs shall actuate the brake and stop the drive sheave.

1.24 The factor of safety of all vital components forming the brakes shall not be less than 3.0 (three).

2.0 Embarking and disembarking stations:

2.1 Embarking and disembarking stations shall be provided at drive station, intermediate station and return stations.

2.2 Both Embarking and disembarking stations shall have horizontal gradient and adequate length. It shall be suitable to easily engage and disengage chairs with persons from the rope.

2.3 Over travel limit switches shall be provided on either end of run so as to stop the system, if any chair reaches such limits.

2.4 Adequate number of stretchers shall be kept available at return/intermediate stations to carry the injured persons comfortably by the chairlift system.

2.5 Push button switch with locking arrangement shall be installed at drive station, return station, intermediate stations and at other suitable locations to stop the system completely in case of emergency as well as to facilitate maintenance of the system.

3.0 Chairs:

3.1 The chair shall be ergonomically designed and provided with a cushioning seat to give comfort to the passenger(s) throughout the travel period.

3.2 A suitable device to prevent backward movement of the chair shall be provided, wherever required.

3.3 A secondary gripping provision in the four-roller assembly or any other suitable arrangement shall be provided to avoid uncontrolled movement of chair due to failure of rubber chuck in the four-roller assembly.

3.4 Number(s) shall be legibly marked on the chairs and suitably arranged at every station for easy access to the passenger(s).

4.0 Route and profile of the roadway:

4.1 The centre line of the roadway should be straight as far as possible. However, horizontal deflection/ vertical deflection of the travel may be permitted with curve station/deflection pulleys respectively provided that the load on the pulley satisfies the requirements.

4.2 The route shall facilitate and allow persons to get down easily from chairs in case of power failure or due to any other reason.

4.3The total load on the rope shall be uniformly distributed all along the rope.

4.4 In order to ensure free movement of passengers, the following clearances shall be provided:

  1. Centre to Centre of Rope : 900 mm,
  2. From side : 0.8m (min),
  3. From top of the chair seat to floor: 1m (Max).

4.5 Along the line, the distance between the two paths of travel of rope shall be such as to avoid contact between persons swung by 12° towards one another.

4.6 The minimum distance between two persons travelling along the line of path shall not be less than the maximum distance between two consecutive pulley stations. The same shall be ensured by any suitable device or mechanism.

4.7 Roof bolt system, wherever adopted, shall withstand a minimum of 7 Tonnes anchorage test.

4.8 Gradient of the road way shall be smooth as far as possible and shall not be more than 1 in 4.

Pulley stations:

4.9 The pulley station / suspension tubes shall be fixed in the roof with suitable roof bolts or to the goal posts with suitable fasteners.

4.10 All the pulleys and its liners shall be designed such that chair can pass over the pulleys smoothly without any jerk to passenger(s).

4.11 The diameter of the deflection sheaves, used for diverting the rope horizontally for more than 5°, shall not be less than 50 times the diameter of wire rope to minimize the flexure loads on the rope.

4.12 All pulleys shall be mounted on suitable sealed bearings.

Rope Guiding:

4.13 The load on rope shall be equally distributed on carrying pulleys by maintaining gradual change in deflection of rope and by maintaining only one person between two pulley stations.

4.14 The rope shall be aligned using pressing pulleys such that it shall be in the centre of each carrying pulley.

4.15 The depression pulleys shall be provided to align the rope in such a way that the rope shall not leave the line of path.

Crossing :

4.16 The chair lift system shall not foul or interfere with any other transport system such as conveyors, haulages etc. In case of any unavoidability of interference, adequate precautions shall be taken to avoid any fouling of one system with the other. A suitable fool-proof system shall be provided at such junctions.

5.0 Curve station:

5.1 Curve station shall be designed as per the given angle with suitable deflection pulleys and railing arrangement so that the chair with passenger(s) shall move freely without getting down from the chair in both the travelling directions.

5.2 Pulleys are to be provided such that load will be distributed equally. Number of pulleys shall be provided depending upon the angle of the curvature to minimize the flexure loads on the rope and wear and tear of pulleys.

5.3 Curve station shall be designed considering passenger(s) safety and convenience. It shall be suitable to easily engage and disengage chairs with passenger(s) from the rope and glide smoothly over the curved rail with rated speed without any jerky moments.

5.4 Suitable guards with interlocking shall be provided wherever required, to avoid injuries to persons during maintenance and other works.

6.0 Rope Tensioning and Anchoring Device:

6.1 The carrying rope shall be kept under tension at one end by counter weight type or any suitable type of tensioning arrangement.

6.2 The tensioning tower in which the counter weights travel (in pit or construction above the ground) shall be protected from water and properly fenced. The free movement of the counter weight shall be ensured at all times.

6.3 The travel of the counter weight shall be determined taking in to account the maximum variation due to the sag of rope.

6.4 All the foundations of tensioning device, anchorage clamps etc., be of adequate strength.

6.5 Over stretch device (Limit switches) shall be incorporated in the tensioning tower to stop the system in the event of rope stretches beyond the present limit or snapping of the rope.

6.6 Scaling arrangement shall be provided on the tensioning tower to indicate/measure the moment of counter weight due to sag of rope.

6.7 Limit switch on return pulley shall be provided to trip the system in the event of slackness of the bearing of the pulley.

7.0 Wire Rope:

7.1 The wire rope shall be of approved by Chief Inspector of Mines and shall conform to IS 1855:2003 or its revised version with minimum size of 16mm diameter, construction of stranded 6x7, galvanized, non lubricated and fibre core. The fibre core shall conform to IS 1804:2004 or its revised version.

7.2 The minimum breaking load of wire rope shall not be less than ten times the maximum pulling load by the system. The same rope shall be used for tensioning arrangement also.

7.3 Care shall be taken to avoid any twisting or kinking of the rope while un-reeling of rope during installation.

7.4 NDT of all vital parts like drive sheave, return pulley, shafts, pins, brake linkages, chairs, steel structures and anchoring pins etc. along with online NDT of rope of Man Riding Chairlift system shall be tested once in six months conforming to standards at any Government approved laboratory or a test house accredited by NABL may also be accepted subject to confirmation of its ability to conduct such tests and such reports along with compliance and performance reports of Man Riding Chairlift System shall be kept available in mine office.

Splices

7.5 All splices shall be made by authorized personnel. The splicing length shall be conformed to IS 5245-1:1969 or its revised version (The length to be taken for splicing shall be not less than 960 times the diameter of the rope).

7.6 Only one spliced joint along closed loop framed by the carrying rope is desirable. However if the length of the rope way exceed 1.0(one) kilo-meter, two splice joints may be permitted.

Rope life and discarding factors

7.7 The life of rope shall be fixed by manager in consultation with engineer and in any case it shall not be more than 2 years and the norms of discarding of the rope shall conform to DGMS Tech. Circular No. 77 of 1963 or its revised version along with following additional conditions:

  1. Reduction in diameter of the rope is 10% of the original diameter when new, anywhere along the length of the rope.
  2. Broken wires with in any one strand exceed 15% of the total no. of wires in that strand.

8.0 Communication and signaling

8.1 Care shall be taken to ensure that the communication and signaling cables do not come into contact either with personnel riding on chair or rope or into contact with other cables and apparatus even under adverse conditions. These cables shall be connected in such a manner to avoid interference with the ropes to ensure the safety and smooth operation.

8.2 Adequate precautions shall be taken to prevent the communication and signal cables do not come into contact with other cables and electrical apparatus. Precaution shall be taken to prevent against danger from lower voltage cables to charge with higher voltage cables, by leakage or contact.

8.3 Pull cord switches shall be provided with locking arrangement and indication lamp installed all along the chair lift system at an interval of 45meters, so that the system can be stopped from any point.

8.4 In order to have better communication, loud hailing communication system (page phones) shall be provided for every 200 meters.

8.5 Pre-start warning alarm shall be of Audio-visual type and provided all along the roadway, to warn the persons. The pre start alarm shall give warning signal for at least 10 seconds before every start of the rope movement.

8.6 Signaling arrangement shall be such that signals can be passed from any point along the road way.

9.0 Electrical

9.1 The electrical equipment for chair lift system shall be selected in accordance with IS 9559:1980 or its revised version. For use in belowground coal mines, all electrical equipments associated with the man-riding car system shall be of flameproof construction & intrinsically safe or intrinsically safe as per requirement, and such equipment/ apparatus shall comply to relevant applicable standards and duly approved by Chief Inspector of Mines. All the electrical components used in the system will be as per earlier approval.

9.2 All electric lighting fixtures shall be of flameproof construction. Provided that, the lighting fixtures may be of increased safety enclosure type ‘e’ in first degree gassy mines at locations other than return airways and in-bye of the last ventilation.

9.3 No part of the structure or frame of the metallic body shall form a part of the electrical circuit or be connected to the electrical circuit.

9.4 All parts of the electrical equipment shall be robust, totally enclosed and have mechanical strength to withstand rough usage.

9.5 All conductors shall be adequately insulated, protected and maintained in such a manner as to prevent leakage or sparking.

9.6 All live parts shall be properly enclosed to prevent sparks, short-circuits etc, when persons coming into contact accidentally with them, and shall be maintained in such a manner that there remains no possibility of inadvertently coming in contact with metallic structures or frames of the system.

9.7 The relevant provisions of the Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations, 2010 as amended from time to time shall be complied in all matters relating to the installation, operation and maintenance of the equipment.

9.8 The cables shall comply to the provisions of the DGMS Tech. Circular (Electrical) Approval No. 12 dated 25.05.2015 and corrigendum vide DGMS Tech. Circular (Electrical) Approval No. 01 dated 19.02.2016 or its revised version in addition to the special requirements, if any, specifically for safe operation of the equipment.

9.9 All electrical equipment associated with the chairlift system shall be checked by electrical supervisor of the mine and the observations shall be recorded daily in a bound register kept for the purpose or in electronic form with due authentication.

10.0 General conditions:

10.1 Adequate lighting arrangement shall be provided all along the road way.

10.2 The speed of rope shall be fixed by Manager in consultation with engineer and original equipment manufacturer.

10.3 Adequate number of competent persons including fitter, electrician, operator, rope splicer, and supervisors (Electrical, Mechanical & Mining) etc. shall be appointed.

10.4 An engineer shall be authorized to hold charge of man riding chairlift system, and to be responsible for its installation, maintenance and safe working.

10.5 Regular inspections of the system i.e., shift wise, daily, weekly, monthly, half yearly etc., as per original equipment manufacturer manual, shall have to be carried out by a competent person appointed by the manager of the mine and results are to be recorded in a soft copy/bound paged book.

10.6 During the period of Field Trial the performance shall be closely observed by your Service Engineer and record such observations and the same shall be kept available at Mine office along with test certificates of rope and vital components. A copy of such observation report shall be submitted to this Directorate in the enclosed Proforma in Annexure E at least once in three (3) months.

10.7 Locking arrangement on Pull cord switches, push button stations, Gates, Guards etc shall be provided to facilitate implementation of LOTO system as per Circular DGMS (Tech)(MAMID)Circular No. 2 dated 15.06.2017 at all the places of workings of the Man Riding.

10.8 All Fire Resistant High pressure Hydraulic Hoses shall comply to the general order No. DGMS/Mech/Technical Cir.(Approval)/04 dated 13.02.2015 or its revised version and Fire Resistant Hydraulic Fluids shall comply to the general order No. DGMS/Mech/ Technical Cir.(Approval)/02 dated 13.02.2015 or its revised version issued by this Directorate.

10.9 All technical circulars/guidelines issued from this Directorate from time to time in the interest of safety shall be complied.

10.10 Every unit shall be supplied with instructions regarding proper use, care, operation and maintenance of the equipment. On every unit a suitable name plate shall be fixed in a conspicuous place which shall bear this approval number followed by DGMS logo and serial number with year of manufacture.

10.11 It is clarified that though above man-riding equipment has been approved for use in mine, it is obligatory on the part of the mine management to obtain permission under Regulation 93(7) of the Coal Mines Regulation, 2017 for use of man riding system.

10.12 Please note that the above approval is also subject to the following additional conditions:

  1. This approval is accorded for Man Riding Chair lift System, Manufactured by M/s. APHMEL to work at Bagdewa UG Mine in Korba Area of M/s. SECL only.
  2. New wire rope shall be installed before putting the Man Riding System in operation and details of the same shall be communicated at this Directorate before putting the system into use.
  3. If at any time, any one of the conditions subject to which this approval has been accorded is violated or not complied with, this approval shall be deemed to have been revoked with immediate effect.
  4. This approval may be amended or withdrawn, at any time if considered necessary in the interest of safety.
  5. This is being issued without prejudice to any other provision of law that may be or become applicable at any time.

 

ANNEXURE   - B

Material specification for Man Riding Chair lift System, Manufactured by M/s. APHMEL to work at Bagdewa UG Mine in Korba Area of M/s. SECL

BIS NO.

(or its revised version)

TITLE

IS 210:2009

Grey iron castings

IS 1030: 1998

Carbon  steel  casting for General Engineering purpose

IS 1570:1978 (Part 1)

Schedule for wrought steels Part 1 Steels specified by tensile and/or yield properties

IS 1804:2004

Steel wire Ropes-Fibre main cores.

IS 1855:2003

Standard steel wire ropes for winding and man riding haulages in mines.

IS 1904 : 1986

Code of practice for design and construction of foundations in soils General requirements

IS 2062 : 2011

Hot rolled medium and high tensile structural steel

IS 3973 : 1984

Code of practice for the selection installation and maintenance of wire ropes.

 

 

ANNEXURE   - C

List of drawings of Man Riding Chair lift System, Manufactured by M/s. APHMEL to work at Bagdewa UG Mine in Korba Area of M/s. SECL.

  1. General Arrangement of Electro-Hydraulic Chair Lift System    Drg.No.7800-02-250.
  2. Drive Unit Assembly for Chair Lift System    Drg.No.7800-02-180 Rev.3.
  3. Return Unit for Chair Lift System   Drg.No.7800-02-200 Rev.2.
  4. Carrying Pulley Double    Drg.No.7800-02-130 Rev.1.
  5. Depression Pulley Double Cranked    Drg.No.7800-02-100 Rev.1.
  6. Suspension with Four Roller for Chair Complete    Drg.No.7800-02-165.
  7. Hydraulic Circuit for Chair Lift System     Drg.No.7800-02-255.
  8. Electrical Layout of Chair Lift System    Drg.No.7800-02-255.

 

 

ANNEXURE   - D

List of electrical items associated with Man Riding Chair lift System, Manufactured by M/s. APHMEL to work at Bagdewa UG Mine in Korba Area of M/s. SECL.

Sr. No.

Details of Equipments

Specification  / Type of the Equipments

Name of the Manufacturer

Location

Test Report / Standard Reference, if any

DGMS Approval No.

  1.  

Electric Motor-60KW, FLP, TEFC, Foot-cum-Flange mounted, 1500RPM in 280M Frame Squirrel Cage Induction Motor

550V, VAC

3 phase, 50Hz

Laxmi Hydraulics

Near Drive Unit

IS:325 &

IS/IES 60079-1:2007

557 of 2007

  1.  

FLP Star-Delta Starter

Ex 630S,550V,

3-phase,50Hz

Mine Line Pvt.Ltd.

Near Drive Unit

IS:325 &

IS/IEC 60079-1:2007

 

448 of 1996

  1.  

FLP Pull Chord Switch

EPC-1

Electrical Equipment Corporation

Gateway

IS:325 &

IS/IEC 60079-1:2007

 

207 of 1981

  1.  

FLP /I.S Audio-Visual Alarm

EEC/FLP/WP/AVA/12,110V AC

Electrical Equipment Corporation

Drive Unit & along Gate Way

IS:325 &

IS/IEC 60079-1:2007

 

 

  1.  

FLP Lighting Transformer

CP-1

Mine Line Pvt.Ltd.

Drive Unit Area & Return Unit Area

IS:2148-2004

169 of 1978

  1.  

FLP Push Button Station

PBS-1

Electrical Equipment Corporation

Drive Unit Area & Return Unit Area

IS:325 &

IS/IEC 60079-1:2007

 

207 of 1981

  1.  

FLP Well Glass Fixture with 26W CFL

LF-01 110V AC

Safex(India)

Drive Unit Area & Return Unit Area

IS:2148 & IS:13346-2004

 

463 of 1999

  1.  

IS Page Home

Type KSPP-01

 

Kaizen Services Pvt. Ltd.

Underground Main Incline Ltd.

ERTL,Test Report No.ERTL(E)/TES/K061/ 0017/06-03,Dt-24.09.2003

 

526 of 2005

  1.  

I.S Power Supply Unit for Page phone

Type KSPP-02

 

Kaizen Services Pvt. Ltd.

Underground Main Incline

ERTL,Test Report No.ERTL(E)/TES/K090/ 0009/11-12,  Dt-17.12.2012

 

526 of 2005

  1.  

FLP Limit Switch

BSS-1

Electrical Equipment Corporation

At Return Unit Area

IS/IEC 60079-1:2007

 

207 of 1982

  1.  

Cables

3Cx35 Sq.mm, 3.3KV Grade

Netco Cables Pvt.Ltd.

Near Drive Unit Area

IS:1554 Part-II

 

  1.  

Cables

2Cx2.5 Sq.mm,

3C x2.5Sq.mm

7C x2.5Sq.mm 1.1KV Grade

Netco Cables Pvt.Ltd.

In Drive Unit Area & along Gateway

IS:1554 Part-I

 

 

 

ANNEXURE – E

Proforma for Quarterly Performance Report of Man Riding Chair Lift System

PERFORMANCE REPORT OF MAN RIDING CHAIR LIFT SYSTEM

(For the period, from                       to                      )

                                                                   Date of Inspection:

Mine:                                                                                     Area:

Name of the Manufacturer

 

Location (From- To)

 

Date of commissioning

 

DGMS  approval No.

 

Permission No.

 

Valid up to:

 

Length of travel (m) and Max. Gradient

 

Sl.No.

DESCRIPTION

STATUS

1.0

PUMP  STATION

 

  •  

Hour  meter  reading

 

  •  

Ref.No. of Electric Motor

 

  •  

Coupling

 

  •  

Fastening/Mounting  of  motor

 

  •  

Oil leakage

 

  •  

Boost  pressure (MPa)

 

  •  

Working  pressure (MPa)

 

  •  

Oil cooler

 

  •  

Oil condition/ Working Temp.

 

  •  

Oil level/ Previous Oil Change    HMR

 

  •  

Oil filter Condition

 

  •  

Vibration if any

 

 

2.0

DRIVE  UNIT

  •  

Drive Unit Motor seepage (lpm)

 

  •  

Outer leakage of Oil

 

  •  

Speed Indicator

 

  •  

Brake Piston Dimension:

When Released (in mm)

When Applied (in mm)

 

  •  

Foundation of frame and Fastenings of drive unit

 

  •  

Brake Test Result (Braking distance)

 

  •  

Condition of Drive Sheave lining

 

  •  

Clearance between drive sheave and Drive Frame

 

  •  

Condition of Brake Pads

 

  •  

Clearance between Brake Pads and Drive sheave face 

 

  •  

Condition of Bearing

 

 

3.0

EMBARKING  AND  DIS-EMBARKING  STATION  AT  DRIVE UNIT

  •  

Condition of Lining of pulleys

 

  •  

Bearings of pulleys

 

  •  

Embarking rail with starting device

 

  •  

Disembarking rail with back run stop device

 

  •  

Fastening of complete construction

 

  •  

Stability/Vibration of the structure

 

 

4.0

GATE WAY AREA

 

  •  

Number of Curve stations

 

  •  

Number of Intermediate stations

 

  •  

Safety provisions at Intermediate stations

 

  •  

Fastening/Stability of all stations

 

  •  

Safety distance in all respects

 

  •  

Lining of pulleys

 

  •  

Roll bearing of pulleys

 

  •  

Stability/Vibration of the Curve station

 

 

5.0

EMBARKING AND DIS-EMBARKING STATION AT RETURN  UNIT

  •  

Condition of Lining of pulleys

 

  •  

Bearings of pulleys

 

  •  

Embarking rail with starting device

 

  •  

Disembarking rail with back run stop device

 

  •  

Fastening of complete construction

 

  •  

Stability/ vibration of the structure

 

 

6.0

RETURN  STATION  AND  TENSIONING  TOWER

  •  

Condition of Lining of return pulley

 

  •  

Bearing of return pulley

 

  •  

Rope, return pulley and tensioning rope directions(In the same plane or not)

 

  •  

Suspension at trolley

 

  •  

Rollers of trolley

 

  •  

Condition of rails and suspensions

 

  •  

Alignment of counter weight

 

  •  

Condition of tensioning rope and rope clamps

 

  •  

Stability of tensioning tower

 

  •  

Max. travel of counter weights

 

 

7.0

CHAIRS

  •  

Total no. of Chairs in operation

 

  •  

Numbering of all chairs & History book

 

  •  

Rollers of Suspension assembly

 

  •  

Bush bearing and Shaft of Suspension Assembly

 

  •  

Average life of Rope Chuck

 

  •  

Chair suspension and Seats

 

  •  

Max. clearance between chair and floor

 

 

8.0

Rope

  •  

Original rope size

 

  •  

Name of Rope manufacturer

 

  •  

Rope changed on date (Life obtained)

 

  •  

Actual rope size and %reduction

 

  •  

Condition of rope  

 

  •  

No. of joints

 

  •  

Spinning of Rope

 

  •  

NDT of Rope

 

 

9.0

ELECTRICAL CONTROL DEVICES

  •  

Proper function of start and stop device

 

  •  

No. of pull cord switches

 

  •  

Over speed tripping device (Location of input)

 

  •  

Right position and function of counter weight limit switches

 

  •  

Proper function of audio visual alarm

 

  •  

Lighting arrangements at Pump station and other stations

 

  •  

Accessibility of controls to Operator

 

  •  

Proper function of page phones

 

  •  

Provision of Pull cord switches along the total length of travel

 

GENERAL CONDITIONS

Condition of Floor along the travel

 

Condition of Roof and Sides along the travel

 

Separate SOPs circulated

 

NDT  (Test report no and Date)

Attach the copy of test report

 

No. of Authorized Fitters

 

Name of the Authorized Engineer

 

History of Accidents if any

 

 

Overall Performance

 

Any other information:

 

 

 

 

 

 Name and Signature

of Service Engineer

Name and Signature of Survey officer

Name and Signature of Mine Engineer

 

 

Name and Signature

of Mine Manager

 

 

Name and Signature of Agent

 

Your Sincerely,
(PRABHAT KUMAR)
Director General of Mine Safety
Date : 19/03/2021
THIS IS A SYSTEM GENERATED DOCUMENT, DOES NOT REQUIRE ANY SIGNATURE.
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