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为了研究采动动压影响下断层面附近的矿压规律,根据朝阳煤矿3101东工作面地质资料和开采技术条件,在几何比为1∶100的条件下制作了3m×0.3m×1.8m的相似模拟材料,布设位移基点和压力传感器进行相似模拟研究。实验结果表明:工作面由下盘向上盘推进过程中,直接顶的周期突变失稳步距为30m,基本顶的垮落周期为60m,工作面超前支撑压力的影响范围为40 m,最大支撑压力值为45.1 MPa,应力集中系数为3.0,实验结果及过程对现场实际施工具有重要的指导意义。
In order to study the law of underground pressure near the fault plane under the influence of mining dynamic pressure, according to the geological data and mining technical conditions of the east face of 3101 in Chaoyang Coal Mine, a 3m × 0.3m × 1.8m Similar simulation material, cloth displacement base point and pressure sensor were simulated. The experimental results show that during the process of the working face being driven from the lower plate to the upper plate, the step-by-step instability step of the direct top is 30m, the collapse period of the basic roof is 60m, the influence range of the advance support pressure of the working face is 40m and the maximum support pressure The value of 45.1 MPa, the stress concentration factor of 3.0, the experimental results and the process of the actual construction of the site has an important guiding significance.