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利用数值分析方法研究了常村矿井巷在动载作用下原巷道、钻孔卸压、预应力注浆锚索底臌治理巷道的动态响应。研究结果表明:在锚索加固区范围内预应力注浆锚索底臌治理巷道相对于原巷道和卸压孔底臌治理巷道的应力峰值均有所减小;原巷道和卸压孔底臌治理巷道在动载作用下引起的位移增量比较接近,而预应力注浆锚索底臌治理巷道位移增量明显要小于原巷道和卸压孔底膨治理巷道位移增量;每种支护形式的底板是振动最剧烈的地方,注浆锚索底臌治理巷道拱底振动速度和振动加速度峰值最大,其次是卸压孔底臌治理巷道,最小是原巷道。研究结果可为动载作用下矿井巷底臌的治理技术设计提供参考。
The dynamic response of the roadway under the action of the original roadway, the pressure relief in the borehole and the bottom of the prestressed grouting and anchor rope under the action of the dynamic load is studied by means of numerical analysis. The results show that the stress peaks at the bottom of control roadway of prestressed grouting anchor cable in the area of anchorage reinforcement zone are both reduced compared with those of the control roadways of the original roadway and pressure relief hole bottom; The increment of displacements caused by the control roadway under the action of dynamic load is relatively close, while the incremental displacement of the roadway under the pre-stressed grouting anchor rope bottom is obviously smaller than that of the original roadway and pressure relief hole. In the form of bottom plate, the vibration is the most violent place. The peak vibration velocity and vibration acceleration at the bottom of grouting anchorage tunnel are the largest, followed by the bottom of pressure relief hole, and the minimum is the original roadway. The research results can provide references for the technical design of mine roadway under the action of dynamic load.