一、煤层概况1.煤层的不稳定性。茶山岭煤矿含煤地层系二迭系龙潭组,内含12层煤层,其中6、7煤层为主采煤层,5、8、9煤层为局部可采煤层,其它为不可采煤层。煤层走向为北东-南西方向,倾向北西,各煤层呈鸡窝、藕节状赋存,在走向上断断续续,起伏波折, First, the coal seam profile 1. Coal seam instability. The Chashanling coal-bearing formation is composed of two superimposed Longtan formations, including 12 layers of coal seams, of which 6 and 7 are mainly coal seams, 5,8 and 9 are partially recoverable seams, others are not recoverable seams. The coal seam moves to the north east-southwest, and tends to the northwest. The coal seams are in the hen’s nest, with the occurrence of the lotus nodding, intermittent and undulating in the direction of the strike,