遗留煤柱下回采巷道布置及分区支护补强研究

Study on the Layout of Mining Roadway and the Reinforcement of Partition Support under the Remaining Coal Pillar

为解决煤层开采时遗留煤柱下方回采巷道极难维护的问题,以寺河二号井为实际工程背景,根据上部采空区煤柱下方回采巷道破坏失稳原因,设计回采巷道的合理布置位置,并提出对处于煤柱交叉区域的巷道分区域补强支护的参数。工作面回采过程巷道围岩变形稳定,两帮最大移近量为110 mm,顶底板最大移近量为80 mm。

In order to solve the problem that it is very difficult to maintain the mining roadway under the left coal pillar during coal mining,taking Sihe No.2 Well as the actual engineering background,according to the failure and instability reasons of the mining roadway under the coal pillar in the upper goaf,the reasonable layout position of the mining roadway is designed,and the parameters of regional reinforcement support for the roadway in the intersection area of coal pillars are proposed.The deformation of surrounding rock of roadway is stable in the process of mining.The maximum displacement of two sides is 110 mm,and the maximum displacement of roof and floor is 80 mm.