In order to realize the safe and efficient mining of the short-distance isolated island working face under the deep goaf area, the 120502 isolated island working face of Liuzhuang Mine was taken as the engineering background. The method of combining numerical simulation and field measurement were used comprehensively to systematically simulate and study the spatial evolution of the stress field, plastic strain field, and fracture field of coal rock during the mining process. The leading support pressure and the vertical displacement of the roof in the overlapping section and noncoinciding section of the isolated working face and the goaf above were measured on site. The results are that the peak value of the advanced support pressure of the overlap section and the nonoverlapping section is 10 m before the coal wall of the working face; the advanced support pressure of the nonoverlapping section is 33.3 MPa, and the vertical displacement of the roof is 300 mm. The advanced support pressure and the vertical displacement of the roof in the noncoincidence section were significantly higher than those in the coincidence section of 18.2 MPa and 210 mm. The results are consistent with those predicted by numerical simulation. This provides theoretical support for the safe mining of the 120502 isolated island working face in Liuzhuang Mine and, at the same time, provides a reference for the study of similar working faces in other domestic mining areas.

中文翻译：

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深采空区下近距岛式工作面岩压特性研究

为实现深空区下短距离孤岛工作面的安全高效开采，以刘庄矿120502孤岛工作面为工程背景。综合运用数值模拟与现场实测相结合的方法，系统地模拟研究煤岩开采过程中应力场、塑性应变场、断裂场的空间演化规律。现场测量了孤立工作面与上方采空区重叠段和非重合段顶板的超前支护压力和竖向位移。结果表明，重叠段和非重叠段的超前支护压力峰值在工作面煤壁前10 m处；非重叠段超前支护压力为33.3 MPa，顶板竖向位移为300 mm。非重合段顶板超前支护压力和竖向位移显着高于重合段18.2 MPa和210 mm。结果与数值模拟预测的结果一致。这为刘庄矿120502孤岛工作面的安全开采提供了理论支持，同时为国内其他矿区类似工作面的研究提供了参考。非重合段顶板超前支护压力和竖向位移显着高于重合段18.2 MPa和210 mm。结果与数值模拟预测的结果一致。这为刘庄矿120502孤岛工作面的安全开采提供了理论支持，同时为国内其他矿区类似工作面的研究提供了参考。非重合段顶板超前支护压力和竖向位移显着高于重合段18.2 MPa和210 mm。结果与数值模拟预测的结果一致。这为刘庄矿120502孤岛工作面的安全开采提供了理论支持，同时为国内其他矿区类似工作面的研究提供了参考。