摘要
深部高应力综放工作面沿空巷道往往围岩变形较大、巷内支护困难。对姚桥煤矿回风巷煤样进行力学分析,掌握巷道地应力分布情况,该巷道地应力主要为水平地应力,且方向接近水平方向。通过开展锚杆支护机理研究证明,锚杆支护对本条件巷道可行有效,采用FLAC3D数值模拟锚杆支护下围岩受力状态,分析了对不同锚杆间距下的不同锚杆长度在深部沿空留巷内支护的情况,确定了合理的支护参数,并在该矿进行了应用试验,巷道变形量得到了有效控制,巷道围岩得到了安全支护。
The deformation is grate and the supporting is difficuh in gob-side entry retaining in deep-mining high-stress fully-mecha- nized top coal caving face. It made a mechanics analysis on the coal samples of Yaoqiao mine return roadway to grasp the stress distribu- tion of roadway. The roadway ground stress is mainly horizontal ground stress, and its direction is close to the horizon. It prove to be that the roadway bolting supporting is feasible based on the bolting mechanism analysis. It simulated the rock roadway stress state by using numerical simulation software FLAC3D,and analyzed the supporting for different lengths and different anchor space in deep gob-side en- try retaining. It puts forward reasonable anchor supporting selection in roadway, and made field tests of application. After the test,the de- formation of the roadway has been significantly reduced,the roadway was supported safely,it has a certain significance for the similar ge- ological conditions of surrounding rock control.
出处
《中州煤炭》
2014年第5期1-4,共4页
Zhongzhou Coal
关键词
沿空巷道
高应力
数值模拟
围岩变形
支护参数优化
gob-side entry retaining
high-stress
numerical simulation
surrounding rock deformation
supporting parameter optimization
