It is reported that the safety of mining has always been a problem worthy of attention. For some safety hazards, there must be some precursors at the beginning. What are the signs of faults?
It generally includes the following four aspects:
1, to a larger inclined coal layer is changed;
2. The top and bottom of the coal seam are seriously uneven, and the rock has large cracks;
3. The thickness of the coal seam changes significantly, the coal seam is soft, the gloss is darkened, and the sliding surface is increased;
4, broken with water or water, gas emission increased.
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