多断面巷道表面收敛快速观测方法研究  

A rapid observation method applied to roadway cross-section reduction

作　　者：郑西贵[1] 张农[1] 韩昌良[1] 

机构地区：[1]中国矿业大学矿业工程学院煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2011年第5期697-701,共5页Journal of China University of Mining & Technology

基　　金：煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM09X03);国家自然科学基金项目(50974118);国家自然科学基金青年科学基金项目(50904064)

摘　　要：通过分析巷道掘进期间围岩表面收敛的规律,得出了多断面巷道表面收敛的快速矿压观测方法.其本质在于在巷道围岩状况相似、支护方式一致、施工速度和质量相同的地点可按不同距离布置多个断面,进行顶底板和两帮宽度的观测,通过空间来换取时间,在较短时间内得出巷道收敛的规律.掘进工作面推进速度较快或巷道矿压显现程度较低的巷道,观测时断面的数量可设置少些,距离可大些,否则应设置更多断面并减少距离.该方法在某矿煤层回风大巷得到了具体应用,通过对间距20～30 m不等的5个断面一周时间的观测后,成功得出了整条巷道26 d内表面收敛及收敛速度的变化规律,为常规观测时间的1/4左右.A rapid method to obtain underground pressures is presented.A regular pattern of surface convergence of the roadway is used for the analysis.The convergence of different cross sections of the roadway is observed,over time and at various spacing,for constant conditions in the surrounding rock,the supports,the excavation speed,and the excavation quality.Long term patterns in roadway convergence over time are obtained.Slow excavations with lower underground pressures require fewer observations overall and the space between observations may be increased.In contrast,rapid excavation requires more closely spaced observations taken more often.The method was successfully applied to the air return roadway in a coal mine.A 26 day pattern of surface convergence was obtained after one week observing five sections： The time required is one quarter of the time used for the traditional observation method.

关 键 词：多断面 巷道 矿压观测 表面收敛 方法 

分 类 号：TD326.1[矿业工程—矿井建设]