千米深井软岩巷道破坏机理及支护技术研究  

Study on failure mechanism and supporting technology of soft rock roadaway in a kilometer deep mine

作　　者：李海燕[1] 刘端举[2] 孙庆国[2] 王怀新[2] 刘玉萍[1] 

机构地区：[1]山东大学岩土结构与工程研究中心,山东济南250061 [2]新汶矿业集团,山东新泰271211

出　　处：《山东大学学报（工学版）》2009年第4期112-115,共4页Journal of Shandong University（Engineering Science）

摘　　要：基于矿井开采逐渐向深部发展,巷道围岩呈现高地压、大变形、难支护的特点,常规锚网支护已难以控制巷道围岩变形的情况.通过对华丰煤矿-1100水平巷道破坏机理的研究,提出了采用马蹄形巷道支护断面和全封闭支护的理念,加强底板承载能力和巷道抗蠕变能力;根据千米深井巷道围岩流变特性,研究得出了围岩地压得到合理释放趋于稳定时进行永久支护的时机和距离,并在永久支护中实施锚注加固,使松散破碎岩块胶结成整体,提高了围岩的内聚力和内摩擦角,使围岩由"软"变"硬",使无支护作用的围岩体变为支护结构,同时锚注锚杆成为全长锚固锚杆,加强了围岩的加固效果,达到安全永久支护巷道的目的.With the gradual deep exploitation of the mine, the surrounding rock mass in the roadway has such characteristics as high ground pressure, large distortion and is difficult to support, which can cause difficulties to control the distortion of surrounding rock with anchor-net support and not be able to meet the demand of safe production. By means of a study on failure mechanism of the 1100 horizontal roadway in the Huafeng coal mine, the conceptions of U-shaped supporting section and closed support were put forward, and the carrying capacity of floor and the resistance to creep of roadway were strengthened. According to the research on rheological characteristics of surrounding rock mass in a kilometer deep mine, a longer time and distance can be 013- tained for permanent support, while the ground pressure around the roadway was released and became stable. Then the ineompact rock block was consolidated to unity with anchoring and grouting in permanent support, and the cohesive strengths and internal friction angles of the surrounding rock were also improved, which make the surrounding rock mass change from soft to hard and no-supported effect to support structure. Meanwhile, the bole strengthened and the reinforcement effect achieved the purpose of permanent safety support for the roadway.

关 键 词：软岩巷道 破坏机理 二次支护 锚注 

分 类 号：TD35[矿业工程—矿井建设]