In order to solve the problem of roadway support safety in coal mining under high stress conditions and to improve safe and efficient production in coal mines, the control countermeasures of the surrounding rock stability and the optimization scheme of support are put forward and the model and numerical simulation of roadway bolt support system are established. Based on bolt support theory and instability mechanism of the coal rock dynamic system, this paper puts forward the evaluation of support effect and the optimization parameters of bolt support, and the scheme of mine pressure monitoring and the corresponding support optimization system are established. The roof fall accident and the bolt and cable of support have been broken in the Wudong coal mine, the phenomenon of bolt pulling out in the roadway. The causes of roof fall are analyzed and the solutions are put forth, judging the influence of different factors on roadway support. In view of the roof fall accident in the North Lane of the east wing of the +575 level 43 #coal seam in the north mining area of the Wudong coal mine, the cause analysis and support suggestions are made. And, according to the performance of the bolting material and anchoring agent, the laboratory theoretical research was carried out. Through the experiment, it is concluded that the FRP bolt with a diameter not less than 27 mm is the first choice for the side support of the working face in the mining roadway, then ribbed steel bolt with a diameter not less than 20 mm for the nonworking face, and the length of the anchor rod not less than the range of the loose circle. Therefore, full-length anchoring should be carried out in roadway support, the anchorage length of the anchor cable should be increased, and the integrity of the roof should be improved, so as to reduce the amount of roadway roof separation and improve the support effect.

中文翻译：

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高应力大斜特厚煤层巷道失稳影响因素分析

为解决高应力条件下煤矿巷道支护安全问题，提高煤矿安全高效生产，提出了围岩稳定性控制对策和支护优化方案，并建立了模型和数值计算方法。建立了巷道锚杆支护系统仿真。基于锚杆支护理论和煤岩动力系统失稳机理,提出支护效果评价和锚杆支护优化参数,建立矿井压力监测方案及相应的支护优化系统。乌东煤矿发生顶板坠落事故，支护锚索断裂，出现巷道锚杆拔出现象。分析了顶板倒塌的原因并提出了解决方案，判断了不同因素对巷道支护的影响。针对乌东煤矿北矿区+57543#煤层东翼北巷发生顶板坠落事故，提出原因分析及支持建议。并根据锚杆材料和锚固剂的性能，进行了实验室理论研究。通过试验得出结论：采掘巷道工作面侧支护首选直径不小于27mm的FRP锚杆，其次是直径不小于20mm的带肋钢锚杆用于非工作面，锚杆长度不小于松圈范围。所以，