富水软岩斜井局部失稳机理及治理对策  

Local instability mechanism and countermeasures for inclined-shaft with water-abundant soft rock

作　　者：吴学明[1,2] 伍永平[1,2] 张建华 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054 [3]神华宁夏煤业集团,宁夏银川750004

出　　处：《煤田地质与勘探》2010年第6期48-53,共6页Coal Geology & Exploration

基　　金：国家自然科学基金重大研究计划项目(90210012);教育部"新世纪优秀人才支持计划"项目(NECT-04-972)

摘　　要：宁夏清水营煤矿1号回风斜井局部破坏较严重,多次发生大面积顶板冒落。通过对冒落区现场调查,并根据现场工程地质条件,利用有限差分程序法和物理相似模拟实验,分析其顶板局部失稳机理,指出导水裂隙带和剪切变形局部化效应是导致有效应力变化和塑性区失稳的主要原因。提出对于冒落轻重区分别采用"锚—网—钢带—喷+11号矿工字钢棚梁"联合支护方案。工程效果表明,这种支护技术对于此类围岩是一种有效的经济支护方式。The 1st air return inclined shaft of Qing Shui Ying mine in Ningxia has been seriously damaged locally,roof fall has occurred for many times in large area.Through on-site investigation in falling area to explore the reasons for destruction,and according to the engineering geological conditions of the site,finite difference procedure and physical similarity simulation experiments were used to analyze the local instability mechanism of the roof,it was identified that the effect of localization of water-conducting fractured zone and deformation was the main reason inducing change of ef-fective stress and instability of plastic zone.Aimed at areas with light and serious falling,the joint suport program of ＂bolt-steel net-steel belt-groutting and no.11 mine-steel shelf beam＂ was proposed.Engineering results showed that the supporting technology for this type of surrounding rock was effective and economic.

关 键 词：富水软岩 斜井 局部失稳 治理对策 

分 类 号：TD82[矿业工程—煤矿开采]