基于FLAC^(3D)的巷道围岩高强预紧力支护数值模拟  

Numerical Simulation on High-strength Pre-stressing Force Support for Roadway Surrounding Rock Based on FLAC^(3D)

作　　者：卓先德[1] 崔伟[1] 

机构地区：[1]泸州职业技术学院,四川泸州646000

出　　处：《煤矿安全》2016年第9期210-212,216,共4页Safety in Coal Mines

基　　金：四川省科技支撑计划资助项目(2014FZ0031)

摘　　要：为解决深部高应力条件下复合顶板煤巷支护困难的问题,针对实际工程情况,采用FLAC^(3D)数值模拟软件对不同预紧力条件下的巷道围岩位移及锚杆形成的附加应力场进行对比分析,研究发现:高强预紧力支护可以明显控制巷道围岩位移,锚杆之间的锚固压应力区相互叠加,形成一定厚度承压拱,围岩整体承载能力得到提高,最后提出高强预紧支护方案并应用于现场,监测结果显示该方案合理可行。In order to solve the support problem of coal roadway with compound roof under high stress condition, in this paper, based on the actual engineering situation, the FLAC3D numerical simulation software is used to contrast and analyze the displacement of sur- rounding rock and the additional stress field of boh under different pre - tightening conditions. The study shows that high strength pre - tightening force can obviously control the displacement of surrounding rock, and the anchoring pressure zone between the anchor bolts is superimposed with each other to form a certain thickness of the pressure arch, and the bearing capacity of the surrounding rock is im- proved. Finally, the high strength ple - tightening support scheme is proposed and applied to the field, the monitoring result shows that the proposed scheme is reasonable and feasible.

关 键 词：高应力 复合顶板 高强锚杆 高预紧力 煤巷支护 

分 类 号：TD353.6[矿业工程—矿井建设]