软弱破碎回采巷道变形特征监测分析  

Monitor analysis on deformation character of soft and crushed mining entry

作　　者：杨相海[1] 张杰[2] 

机构地区：[1]陕西能源职业技术学院能源工程系,陕西咸阳712000 [2]西安科技大学能源学院,陕西西安710054

出　　处：《西安科技大学学报》2010年第4期393-396,共4页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金资助项目(50074023);陕西省教育厅专项科研计划项目(09JK599);西安科技大学博士启动金项目(200801)

摘　　要：破碎围岩巷道的变形与失稳行为很复杂,巷道围岩局部变形易引起破坏失稳,而理论计算得到的支护参数与工程实际相差甚远。基于现场调查,通过表面变形与深部离层规律综合监测,深入分析了复杂地质条件下松软破碎围岩局部变形与演化失稳机理。监测表明:巷道开采深度较大时,围岩变形情况比较复杂,煤层裂隙发育,巷道顶底板和两帮变形大;巷道积水造成底鼓时,因现有的支护方式不适应围岩非线性、大变形的要求,而必然导致支护失效。研究成果对回采巷道支护方案的选择具有重要的借鉴作用,为工程防灾和减灾提供了科学依据。The crushed rock-mass＇s failure behavior and process is complex and the crushed rock-mass will be destroyed and instabilized, but the support parameter from theory calculation is different from filed engineering. Based on field geologic investigation, the mechanism analysis of part deformation and instability in complex soft and crushed rock-mass condition is accomplished through monitor of surface deformation and deep deformation. The analysis indicates that the rock-mass deformation is complex condition because the mining depth is big. The fracture of coal is developed and the deformation of roof and working slope is big, floor is protruded because of entry water. The support way can＇t meet the requirement of rock-mass nonlinearity and big deformation character and must lead to support lose efficacy. The study achievement is referential for support way in mining entry choosing, and provides a scientific proof for hazard prevention.

关 键 词：破碎围岩 回采巷道 巷道变形 

分 类 号：TD32[矿业工程—矿井建设]