厚煤顶大断面煤巷关键部位及围岩控制  

Control of Key Parts and Surrounding Rock in Large Section Coal Roadway with Thick Coal Roof

作　　者：张凤岩[1] 

机构地区：[1]华北科技学院安全工程学院,河北廊坊065201

出　　处：《煤炭技术》2017年第3期38-41,共4页Coal Technology

摘　　要：采用UDEC模拟了巷宽对山西磁窑沟煤矿10106输送带巷围岩稳定的影响,结果表明:顶、底塑性区呈"拱形"分布,两帮呈"三角形"分布。塑性区深度顶板>两帮>底板;塑性区深度增加迅速:两帮>顶板>底板;围岩表面变形:顶板>两帮>底板,表面变形增加量:顶板>两帮>底板。认为:两帮上部为第一控制关键部位,顶板为第二控制关键部位,两帮和顶板锚杆索空间应力骨架结构互相促进围岩稳定。基于此采用高强高预紧力锚杆索支护技术。Responses of surrounding rock with various wdith was analyzed by UDEC in No. 10106 belt transportation roadway of Ciyaogou coal mine in Shanxi. The results showed that plastic zone areas in roof and floor are all distributed as arch shap, and two sides as triangle. Depth of plastic zone：roof〉two sides〉floor,increasing rate of plastic zone depth： two sides 〉 roof 〉floor;Surface displacement： roof〉two sides〉floor,increasing rate of surface displacement： roof〉two sides〉floor. It is considered that： the upper parts of two sides is the first key part,the middle of roor is the second one, the control function of anchor cable interaction space structure in the surrounding rock can enhance the bearing capacity. So, timely support technology of high strength and high pre-stressing bolt and net and cable was proposed.

关 键 词：厚煤顶 大断面 煤巷 支护 

分 类 号：TD32[矿业工程—矿井建设] TD35