矩形巷道支护预紧力对围岩稳定性的影响

摘要

The cracked roof of Liangshuijing coal mine 3-1 coal is as the research object,the influence of an-chor bolt and cable preload to surrounding rock stability is analyzed.The method of numerical simulation is adopted, the stability change rule of rectangle section roadway surrounding rock is analyzed under the condition of different pre-load,the deformation and failure characteristics of the roadway surrounding rock is obtained under the condition of dif-ferent preload.By numerical simulation the best preload scheme of anchor bolt and cable supporting in 3-1 coal rec-tangle roadway is put forward.In order to achieve the purpose of exerting the active support action of anchor bolt and cable,reducing labor intensity and improving economic benefits.%以凉水井煤矿3-1煤破碎顶板为研究对象，对锚杆索预紧力对巷道围岩稳定性的影响进行分析。采用数值模拟的方法，分析了不同预紧力条件下，矩形断面巷道围岩的稳定性变化规律，得出不同预紧力情况下，巷道围岩变形及破坏特征，通过数值模拟，提出3-1煤矩形巷道锚杆索支护最佳预紧力方案，以达到充分发挥锚杆索的主动支护作用，降低劳动强度，提高经济效益的目的。