基于修正普氏拱的巷道锚杆支护技术  

Roadway Bolt Supporting Technique Based on Modified Natural Arch

作　　者：鲁岩[1] 邹喜正[1] 刘长友[1] 

机构地区：[1]中国矿业大学能源与安全工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2007年第4期461-464,共4页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50574089)

摘　　要：为了对受到较大水平应力的巷道进行有效的支护,本文在考虑水平构造应力作用情况下,假设巷道周边的岩体为松散破碎岩体,分析了巷道周边自稳结构的形状,得到开挖巷道周边最终形成的修正普氏拱的方程.在此基础上,推导出巷道顶部和两帮的破碎范围与松动压力计算公式,为巷道的加固范围和支护强度计算提供了理论依据。在神火矿区新庄矿现场地应力测量值基础上,采用以上理论,进行巷道的锚杆支护设计,得到了很好的支护效果.并采用YZT-Ⅱ型岩层钻孔探测仪观测巷道周边的破碎状况,测量结果与采用修正普氏拱理论计算结果接近.In order to support the roadway suffering great horizontal stress effectively, the shape of self-stabilized structure around roadway was analyzed in considering the horizontal tectonic stress and supposing that the rock mass is fractured around roadway, obtaining the equation for the modified natural arch. On the basis of this, the formula of the cracked range and broken-rock pressure was induced, providing a theoretical basis for calculating the reinforcing range and supporting intensity. Based on in-situ measured values in the Xinzhuang mine of the Shenhuo Group,the bolt supporting was designed according to the research result, which have been proved to be successful. The YZT-Ⅱ terrane bore detector was used to observe the fragmentation around the roadway, showing that the observation is in good accordance with the calculated result.

关 键 词：修正普氏拱 松动压力 自稳结构 锚杆支护 

分 类 号：TD353.6[矿业工程—矿井建设]