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以平顶山一矿丁6-32030工作面跨采的回风下山为对象,对其变形破坏机理进行研究。首先通过数值模拟的方法从采动应力的角度对其变形影响因素进行分析,得出工作面跨采时水平应力集中程度远高于垂直应力集中程度。现场布置多个变形观测点,在工作面回采过程中进行持续观测,从实测结果可以得到巷道底鼓量最大值为670 mm以及左右帮最大值为200 mm。综合以上分析得出水平应力是导致工作面跨采回风下山出现变形破坏的主要因素。
Taking Pingjishan Mine 6-32030 working face cross-over recovery wind and downhill as the object, the deformation and failure mechanism was studied. Firstly, the influencing factors of deformation are analyzed from the aspect of mining stress by numerical simulation. The result shows that the horizontal stress concentration is much higher than that of vertical stress when the working face is over-mining. A number of deformation observation points were arranged on site, and continuous observation was carried out during the mining face recovery. From the measured results, the maximum value of the bottom drum volume of the roadway was 670 mm and the maximum value of left and right help was 200 mm. Based on the above analysis, it is concluded that the horizontal stress is the main factor that causes the deformation and failure of cross-mining face downwind of working face.