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根据星村煤矿3302综放工作面的地质资料和开采技术,在几何比1∶100的条件下制作了3 m×0.3 m×1.8 m的相似模拟材料模型,在模型的正面不同层位共布设了8层位移基点,用电子经纬仪来观测岩体在开采过程中的位移变化情况;共布置6条间距200 mm的压力水平测线,通过压力传感器来监测覆岩的支承压力。实验室内相似材料模拟实现了对煤层开采过程中覆岩运动的全程观测。
According to the geological data and mining technology of 3302 fully mechanized top coal caving face in Xingcun Coal Mine, a similar simulated material model of 3 m × 0.3 m × 1.8 m was fabricated under geometric ratio of 1: 100. The 8-layer displacement base point was used to observe the displacement change of the rock mass during the mining process with the electronic theodolite. Six pressure measurement lines with a spacing of 200 mm were arranged and pressure sensors were used to monitor the bearing pressure of the overburden rock. Simulation of similar materials in the laboratory realizes the whole observation of overlying strata movement during the process of coal seam mining.