Annual Report,2009 - Directorate General of Mines Safety
Annual Report,2009 - Directorate General of Mines Safety
Annual Report,2009 - Directorate General of Mines Safety
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DGMS <strong>Annual</strong> <strong>Report</strong>, <strong>2009</strong><br />
The supplied energy shall be disconnected from all apparatus (including<br />
portable & transportable apparatus) working in the vicinity <strong>of</strong> a place where<br />
inflammable gas has been detected by the lowered flame <strong>of</strong> a flame safety<br />
lamp kept and maintained in a continuous state <strong>of</strong> illumination. The apparatus<br />
shall be interlocked with controlling switch in such a manner as to disconnect<br />
power supply automatically in the event inflammable gas exceeds 1.25% at the<br />
place. Further, if an approved apparatus for automatic detection <strong>of</strong> % <strong>of</strong><br />
inflammable gas or vapour in addition to Flame <strong>Safety</strong> Lamp is provided in<br />
any working district or place such apparatus shall be interlocked with portable<br />
or transportable equipment.<br />
Thus looking into the all above aspects and considering high<br />
production and mechanization, it is suggested to install a LMD (Local<br />
Methane Detector) which can automatically and continuously detect %<br />
inflammable gas at all mines having II/III degree gassy seams at following<br />
places :-<br />
(i)<br />
(ii)<br />
(iii)<br />
(iv)<br />
District/Faces having continuous mining machine.<br />
Return side <strong>of</strong> district/Longwall faces<br />
Return airway having Electrical motors.<br />
Main return airway.<br />
Though the power supply in a district has to be discontinued whenever<br />
the % <strong>of</strong> inflammable gas reaches 1.25, the power to the ventilating fans<br />
(auxiliary/booster) shall be so arranged that they run continuously.<br />
It is expected that al owner, agent and manger shall implement this<br />
circular with right spirit.<br />
¸üÖÂÒü úß ÃÖê¾ÖÖ ´Öë<br />
A century committed to the service <strong>of</strong> the nation<br />
No. DGMS (Tech)/Circular No./ 07 Dhanbad, Dated – 12/03/<strong>2009</strong><br />
To,<br />
Owner/Agent/Manager <strong>of</strong> all <strong>Mines</strong>.<br />
Sub:- Safe gaps between cage and landing levels in winding shaft<br />
An accident occurred in one <strong>of</strong> the coal mines when a work person was entering in to<br />
a cage at inset landing, he fell down in the shaft. The investigation revealed that the<br />
gap between the cage and the collar <strong>of</strong> the shaft at the inset landing was abnormally<br />
large which resulted in the accident.<br />
Although the gap between the cage and the landing level is governed by<br />
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