NO: E-29021|62350|2025|Electrical(HQ)                                                                                                                                                                Dhanbad, Date: 08/08/2025     

                                                                                                       (DGMS Approval No.856 of 2025)

From

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

To

SOMNATH DUTTA MAJUMDAR, JOY GLOBAL (UK) LIMITED, JOY GLOBAL (UK) LIMITED 4 SWANWICK COURT ALFRETON DERBYSHIRE - DE55 7AS
Derbyshire, ALFRETON, ALFRETON, 0

Subject: Approval under Regulation 208(3) of the Coal Mines Regulations, 2017 for Flameproof and Intrinsically Safe electrical apparatus (as listed in the enclosed Annexure-B) incorporated/associated with the Continuous Miner, Model 12CM15, manufactured by M/s. Joy Global (UK) Ltd., for use in belowground coal mines in India – Regular  approval thereof.

Sir,

I, in exercise of 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 and in reference to Field Trial approval No. FT_E_61996  issued vide letter No E-29021|61996|2024|Electrical(HQ) Dhanbad, Date: 04.10.2024, Test Report as per Annexure ‘A’ and based on the performance reports received from Dhankasa underground coal mine of M/s. Western Coalfields Limited, Hereby accord the approval (DGMS Approval No.856 of 2025) for a period of five years, from the date of issue of this letter i.e. up to 07/08/2030 for use in belowground Coal Mines in India with the conditions and equipment as mentioned in the Annexure - A & B.

Please note that application for renewal should be made at least three (03) months before the date of expiry of the approval.

(UJJWAL TAH)
Director General of Mine Safety - (HQ)
Date : 08/08/2025

Annexure-A

Conditions for Approval under Regulation 208(3) of the Coal Mines Regulations, 2017 for Flameproof and Intrinsically Safe electrical equipment  (as listed in Annexure – B) incorporated / associated with the Continuous Miner, Model 12CM15 confirming to IS/IEC 60079-0:2017,  IS/IEC 60079-1:2014, EN 60079-0:2018,  EN 60079-1:2014, IS/IEC 60079-11:2011, Manufactured by M/s. Joy Global (INDIA) Pvt. Ltd., Kolkata for use in Underground Coal Mine in India.

1. Every unit shall carry conspicuously in a permanent manner the aforesaid identification mark, i.e. ‘DGMS Approval No. 856 of 2025’.

       2. In addition, every unit shall also carry permanently this Directorate’s approval mark, as below:

 3. The design of the electrical circuit shall not be changed without obtaining prior approval from this Directorate.

4. Conspicuous warning inscriptions against opening the cover of the main enclosure or of any apparatus which gives access to the flameproof enclosures on live parts, or which is designed to receive cable attachment unless the supply to the unit is isolated at source, shall be affixed permanently on the respective part to ensure that all live parts within the unit are made dead and safe.

5. Spare parts shall be made readily available to the user as and when required for proper maintenance of the equipment. In the interest of safety, the OEM guidelines shall be adhered to and spares, supplied by OEM shall only be used while maintaining the machine.

6. The customer shall be supplied the copy of this approval letter, the test report from the testing laboratory with the lab certified drawing, an extract of the condition & special conditions, maintenance schedule, if any, recommended by the testing laboratory in their test report(s) so as to maintain safety features of   apparatus / equipment.

7. The customer shall also be provided a copy of factory test report along with drawings, instruction manual on the installation, operation and maintenance of the equipment and spares parts catalogue at the time of delivery of the equipment.

8. The user shall furnish the performance report of the equipment directly to this Directorate after one (01) year of actual use.

9. While seeking renewal, valid BIS license in the case of Indian manufacturers and in case of foreign manufacturers, QAR/QAN, as may be applicable shall be submitted and the same shall remain valid as long as the apparatus is manufactured and marketed.

10.  Any modification to the equipment that might be considered necessary at a later date shall be effected upon being so directed by this Directorate.

11.  The high-pressure hydraulic hoses supplied with the machine shall confirmed to the standards and parameters as prescribed in the DGMS/Mech/Tech.Cir (Approval) No. 04, Dhanbad, dated 13.02.2015

12. The Fire-Resistant Hydraulic Fluid supplied with the machine shall confirm to the standards and parameters as prescribed in DGMS/Mech/Tech.Cir (Approval) No. 02, Dhanbad, dated 13.02.2015.

13. The cables connecting with equipment shall confirm to the provisions of the DGMS Tech. Circular (Electrical) No. 12 dated 25.05.2015 and corrigendum vide DGMS Tech. Circular (Electrical) Approval No. 01 dated 19.02.2016 in addition to the special requirement, if any, specifically for safe operation of the equipment.

14.All covers, doors/access covers of the electrical equipment mounted on the equipment, on opening/removal which may expose live internal conductors, shall have warning instructions either by raised lettering or by other suitable means against such opening / removal of covers, doors and access covers, without isolating supply of energy to the equipment from its source.

15. The plug and socket assembly affixed to the motors/panel, if provided, will be so interlocked as to prevent removal of plug from the socket while alive.

16.In the interest of safety, the OEM guidelines shall be adhered to and spare, supplied by OEM shall only be use while maintaining the apparatus. Spare parts shall be made readily available as and when required for proper maintenance of the equipment. Any failure in the equipment shall be intimated to this  Directorate.

17. All sensing devices shall be regularly tested and, routinely calibrated or verified to ensure correct operation and a record of the same shall be maintained.

18. The associated items for which approval has been issued is exclusively for use as part of this equipment only and shall not be read as individual approval for those items.

19.The electrical equipment and cables associated with the machine shall be checked by the Electrical Supervisor of the mine for their respective flame proofness of the equipment and condition of cables in the beginning of each working shift and the findings thereof enter into a bound-paged book maintained   for that purpose which shall be duly signed by the Electrical Supervisor with the date.

20. In the event of any revision of standards applicable to the product/equipment, the manufacturer shall get the product/equipment tested as per revised standards and submit test reports to the customer for information and to this Directorate for further approval/renewal.

21.The cable entry devices, threaded adaptors and stopping plugs shall be suitable for the equipment and be considered as a part of equipment (not a component). The cable entry device and cabling methods used shall be suitable for their intended duty and for the special type of cable used in mining. Such cable entry devices shall be duly certified as per relevant IS/IEC standards.

22.The approval of the subject equipment is with regard to Ex standards mentioned herein. Other relevant standards applicable for assessment of its electrical parameters required under type test have not been taken into consideration.

23.All circulars/general approvals issued by DGMS from time to time, relevant to the equipment shall also be complied with.

24.The relevant provisions of the Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations, 2010 shall be complied with in all matter relating to the installation, operation and maintenance of the equipment.

 25. The approval is accorded for a period of five years i.e. till 07/08/2030

26. At the time of applying for renewal, details of supply with name of mines, purchase order and date shall be furnished with the application.

27.If at any time any of the conditions subject to which this approval has been granted, is violated or not complied with, this approval shall be deemed to have been revoked with immediate effect.

28.The above approval may be amended or withdrawn at any time, if considered so necessary in the interest of safety and is being issued without prejudice to any other provisions of law which may be or may become applicable at any time.

You shall submit the test reports conforming the latest applicable testing standards within three months if not submitted before.

(UJJWAL TAH)
Director General of Mine Safety - (HQ)
Date : 08/08/2025

Annexure-B

List of Flameproof and Intrinsically Safe electrical apparatus(as listed in the enclosed Annexure-B) incorporated/associated  with the Continuous Miner, Model 12CM15, manufactured by M/s. Joy Global (UK) Ltd., for use in belowground Coal Mines in India under Regulation 208(3) of the Coal Mines Regulations, 2017.

(UJJWAL TAH)
Director General of Mine Safety - (HQ)
Date : 08/08/2025