巴拉素煤矿2号煤层“两带”发育高度研究

Development height of “two zones” of No.2 coal seam in Balasu Coal Mine

摘要: 巴拉素煤矿水文地质评价结果为复杂型，因此必须测量其导水裂隙带与冒落带发育高度。采用洗液漏失量观测、压水试验和电视窥视3种方法对巴拉素煤矿2号煤层开采后顶板导水裂隙带和冒落带发育高度进行研究。结果表明，巴拉素煤矿2号煤层导水裂隙带发育高度为103.68～107.58 m,裂采比为31.42～32.60;巴拉素煤矿2号煤层的冒落带发育高度为22.58 m,冒采比为6.84。此外，研究发现3种方法确定的“两带”发育高度在同一采空区具有变异性，在顶板管理时需考虑这一特性。

Abstract: This paper investigates the development heights of the water-conducting fracture zone and collapse zone in the roof after mining the No.2 coal seam at the Balasu Coal Mine using three methods of wash fluid loss observation, water pressure test, and borehole television inspection.The results indicate that the development height of the water-conducting fracture zone in the No.2 coal seam of the Balasu Coal Mine ranges from 103.68 to 107.58 meters, with a fracture-to-mining ratio of 31.42 to 32.60.The development height of the collapse zone in the No.2 coal seam is 22.58 meters, with a collapse-to-mining ratio of 6.84.