巷道围岩支护的极限自稳平衡拱理论

Ultimate self-stable arch theory in roadway support

根据巷道围岩垮落过程的自稳平衡现象,提出了巷道围岩极限自稳平衡拱概念,按照顶板围岩冒落区的拉破坏原则和无拉应力条件,给出了极限自稳平衡拱的椭圆曲线方程。考虑巷道两帮破坏区对顶板稳定性的影响,提出了巷道围岩的极限自稳平衡拱理论,揭示了巷道围岩的控制对象为自稳平衡拱内的岩体。基于巷道"底板-两帮-顶板"相互影响,巷道支护应当按照极限自稳平衡圈进行设计。结合大量的实践总结,提出了巷道支护要重视两帮和底板的原则,为软岩巷道支护理论与实践提供了新的借鉴。

Based on the homeostatic phenomenon in roof caving process of roadway, the concept of ultimate self-stable arch of roadway is put forward. In accordance with the principles of roof rock destruction pull caving area and no tensile stress conditions, the limits of homeostasis arch elliptic curve equation is set up. Considering the impact of roadway ribs damaged areas on the roof stability, the ultimate self-stable arch theory in roadway control is proposed. Based on the interaction of“floor-rib-roof”, the roadway support should be designed according to the whole ultimate self-stable circle. Combining plenty of practical work experiences, the roadway support principles are renewed to pay attention to the ribs and floor support, and the key points of bolting quality are presented. This research will provide a new scientific basis for the theory and practice of roadway support.