深井巷道底鼓机理及切槽控制技术分析  

Analysis of Floor Heave Mechanism and Cutting Control Technique in Deep Mines

作　　者：郭保华[1] 陆庭侃[1] 

机构地区：[1]河南理工大学能源学院,河南焦作454010

出　　处：《采矿与安全工程学报》2008年第1期91-94,共4页Journal of Mining & Safety Engineering

基　　金：河南省杰出人才创新基金项目(0621000400)

摘　　要：为了确定水平应力对深井软岩巷道底鼓的影响,采用数值模拟软件FLAC3D对不同岩性、不同侧压系数的巷道变形破坏情况及底板切槽深度对巷道变形的影响进行了研究.结果表明,岩性较弱时,侧压系数对巷道变形影响较大,侧压系数小于1时,巷道顶板下沉量较大,侧压系数大于1时,两帮变形量及底鼓量较大,且侧压系数越大,两帮变形量及底鼓量越大.底板垂直切槽技术能有效减少巷道底鼓量和顶底移近量,切槽深度为巷道宽度一半时,巷道稳定性最好.In order to determine the effects of horizontal stress on floor heave of soft rock roadway in deep mines, the effects of different rock strength, lateral pressure coefficients and depths of notching in floor on deformation of roadway are numerically studied by means of FLAC^3D software. The results show that when the surrounding rocks are soft, the lateral pressure coefficients have a significant effect on deformation of roadway. And when lateral pressure coefficient is smaller than 1, there will be a big roof subsidence~ otherwise, there will be a seri- ous deformation of two ribs and a serious floor heave, and the greater the lateral pressure coefficient, the more serious the deformation of two ribs and the floor heave will be. Vertical cutting in floor can effectively reduce the floor heave and the convergence between roof and floor, when the cut depth is half of the width of roadway, the stability of roadway reaches the best.

关 键 词：巷道 水平应力 底鼓 切槽 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]