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Mine units:
In order to ensure the safety of the drilling construction process and prevent accidents caused by abnormal phenomena, the following preventive measures are formulated and it is expected to comply with the implementation.
First, before the first rig construction on the surrounding roof, support, and geology of coal layers occurrence confirmation before proceeding to the construction without exception.
2. The 2306 wind and machineway measures hole construction cancels the hand-held drilling rig , and all the ZQJC-400/11.0S type and above column type drilling rigs are used for construction; the coal seam excavation working face construction area is gradually adopted ZQJC-400/11.0S Type and above column type drilling rigs; other places where hand-held drilling rigs are used, when it is found that there are top drilling, nozzle holes, gas gushing abnormalities, etc., the column-type drilling rig should be used instead.
3. When using ZQJC—400/11.0S type and above type column rig construction, it is necessary to add protective fences in front of the drilling rig and the rig operating platform to prevent the drill rod from injecting and preventing people's precautions, and to protect the outer leakage part of the bracket drill pipe. The net must be operated on both sides of the rig when the personnel are operating. It is not allowed to face the tail of the drill pipe and minimize the number of construction workers.
4. When drilling, when there is a power phenomenon such as top drilling, nozzle hole, gas emission abnormality, etc., the drilling must be stopped immediately, the cause should be found, and the connection should be connected and 2 meters in the vicinity (partial measure hole 0.5 in the mining face) - 2.0m) Construction of pressure relief drilling, no abnormality can continue construction, the number of drilling rig operators must not exceed three.
5. During the drilling, the drillers are forbidden to stand behind the rig to prevent the pressure from being damaged due to the pressure of the gas or the self-weight of the rig.
6. When loading and unloading the drill pipe, the construction personnel shall not stand in front of or directly behind the drill pipe to prevent the drill pipe from being crushed due to sliding or mishandling.
7. When the rig has a large elevation and a depression angle, and the drill pipe has self-slippage, the rig should not be placed in the neutral position before the drill pipe is installed or unloaded to prevent the automatic sliding of the injured person.
8. During drilling, if the gas pressure in the borehole is large, there is a phenomenon of pinch drilling, top drilling and poor powder discharge, the drill should be repeatedly advanced and retracted in a small range to prevent the drill pipe from being pinched, only when After the signs disappear, the drilling can be resumed.
9. During the drilling, the construction personnel must carry the gas portable instrument and hang it on the downwind side of the drill. When the gas concentration reaches 0.5%, stop drilling immediately to find out the cause.
10. When drilling, do not look directly at the hole to prevent the hole from injuring people.
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