青洼煤业2103工作面留小煤柱沿空掘巷技术研究与应用

Research and Application on Roadway Driving Technology along Goaf with Small Coal Pillar in the 2103 Working Face of Qingwa Coal Industry

为提高青洼煤业2^#煤层的采出率,设计在21031巷进行留小煤柱沿空留巷应用试验,通过数值模拟研究不同支护方案条件下巷道围岩内应力分布和位移情况,确定最为合理的支护方案。现场应用期间围岩位移监测结果:顶底板最大移近量为142mm,煤柱帮内移量最大为75mm,实体煤帮内移量最大为62mm,巷道围岩变形量较小。

In order to improve the recovery rate of No.2 Coal Seam in Qingwa Coal Industry,the application test of retaining small coal pillar along gob is designed in 21031 lane.The stress distribution and displacement of surrounding rock under different support schemes are studied by numerical simulation,and the most reasonable support scheme is determined.During the field application,the displacement monitoring results of surrounding rock:the maximum displacement of roof and floor is 142mm,the maximum displacement of coal pillar side is 75mm,the maximum displacement of solid coal side is 62mm,and the deformation of surrounding rock of roadway is small.