论文部分内容阅读
布尔台煤矿42201运顺工作面掘进期间,巷道两帮发生片帮,片帮深度达0.3-1.0m,使巷道超出原设计断面净宽0.6-2.0m,成为布尔台煤矿重大危险源之一。针对该矿存在的片帮灾害问题,结合并分析周边矿井片帮问题原因,提出了超前预应力体系理论和两帮支护方案。
During the boring of 42201 Yunshun working face at Bo\'Tai Coal Mine, two gangways of the roadway occurred as a piece of gang, reaching a depth of 0.3-1.0m so that the roadway exceeded the net width of 0.6-2.0m of the original design section and became one of the major hazards of the Bertuai Coal Mine. Aiming at the problem of sheet bar disaster existing in this mine, the theory of advanced prestress system and two supporting schemes are put forward in combination with the analysis of the cause of surrounding mine sheet slab.