采空区下特厚煤层综放开采回采巷道矿压显现规律实测分析

Measurement and Analysis of Ground Pressure Behavior of Mining Roadway in Full-mechanized Caving Mining of Extremely Thick Coal Seam Under Goaf

为解决采空区下特厚煤层综放开采回采巷道矿压显现强烈的问题,以国投塔山煤矿3-5~#煤层30501工作面为工程背景,在采矿学、矿压相关理论的指导下,综合运用多种现场实测的方法,对工作面两巷不同位置处的煤柱应力分布、锚杆(索)工作载荷、巷道围岩裂隙及松动圈发育、巷道变形等规律进行了深入的监测分析。分析结果充分揭示了采空区下特厚煤层综放开采不同位置处回采巷道强矿压显现的诱发机理。

In order to solove the problem of strong pressure behavior of mining roadway in sub-level caving mining of extremely thick coal seam under goaf, taking 30501 working face in 3-5~# coal seam of SDIC Tashan Coal Mine as engineering background,varied of field measurement methods were used under the guidance of mining science and theory of the mine pressure, the stress distribution of coal pillar, the working load of bolts, the cracks and the loose circle development of roadway and the roadway deformation laws were deeply monitored and analyzed. The measurement and analysis result has fully revealed the inducement mechanism of strong pressure behavior of different positions in mining roadway in sub-level caving mining of extremely thick coal seam under goaf.