论文部分内容阅读
根据半无限体理论,建立了倾斜煤层走向底板采动破坏深度力学求解模型,计算了倾斜煤层底板采动最大破坏深度。以平煤十矿的开采地质条件为工程背景,基于FLAC~(3D)数值仿真软件,对22300工作面底板采动破坏特征进行数值模拟。研究表明:沿煤层走向方向,底板采动塑性破坏区大致呈1个勺底偏向停采线一侧的“勺状”分布形态,且当推进至工作面“见方”期(回采距离等于工作面斜长)时,底板采动破坏深度首次达到峰值15 m。采用位移传感器法,对底板破坏深度进行现场实测,底板位移监测曲线表明,底板采动最大破坏深度为14~16 m,与理论计算及数值模拟所得结果吻合。
According to the semi-infinite body theory, a mechanics solution model of mining depth of inclined coal seam towards the floor was established, and the maximum depth of excavation of inclined coal seam floor was calculated. Based on the mining geological conditions of Pingdingshan No.10 Mine, the numerical simulation of the mining failure of floor in 22300 working face was carried out based on FLAC 3D numerical simulation software. The results show that, along the direction of the coal seam, the bottom of the plastic mining area is about 1 scalloped bottom to the “scoop-like” distribution on the side of the cut-off line, and when pushed to the working face The distance is equal to the slope of the working face), the depth of mining failure of the floor reaches the peak value of 15 m for the first time. Displacement sensor method was used to measure the failure depth of the floor. The displacement monitoring curves of the floor show that the maximum failure depth of floor mining is 14 ~ 16 m, which is in good agreement with the theoretical calculation and numerical simulation.