软岩大断面车场和硐室近距离跨采

Coal Mining Operation Crossing Over Large Cross Section Shaft Bottom and Underground Chamber with Short Distance

针对－ ４００ ｍ 车场和硐室距上覆煤层底板岩柱较小的实际情况， 探讨了合理的跨采卸压方案， 确定了硐室的支护加固参数， 保证了跨采安全， 取得了显著的经济效果。

A expansion of a - 650 m Level in Wennan Coal Mine is not yet completed. Due to a continued high tension in the coal production of the coal mining face, a - 400 m Level was used to excavate coal at the first stage of the - 650 m Level. Therefore the coal mining operation should excavate coal seam crossing over the shaft bottom and chamber in the - 400 m level. Thus, the strata over the shaft bottom and chamber will have pressure releasing and the stress in the surrounding rocks will be redistributed. The stressed conditions of the shaft bottom and chamber will be fundamentally improved. With a full consideration of coal production, two crossing over mining and pressure releasing planes were proposed base on the technology and economic summary. A combined mining and pressure releasing method was used for the two seams over the shaft bottom and chamber. The feasibility of the plan was furthered confirmed base on the simulation test for the real effect of the plan after in practices.