渗水厚砾石层斜井围岩破坏机理模型试验  

Model test on failure mechanism of the surrounding rock of oblique laneway in thick gravel stratum under seepage water

作　　者：闫振东[1,2] 杨仁树[1] 岳中文[1] 董聚才[1] 牛学超[3] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]晋城无烟煤矿业集团有限责任公司,山西晋城048006 [3]北京工业职业技术学院建筑工程系,北京100042

出　　处：《煤炭学报》2009年第12期1599-1604,共6页Journal of China Coal Society

基　　金：国家科技支撑计划(2008BAB33B04-3;2007BAK24B00);国家自然科学基金资助项目(50874109)

摘　　要：以新疆伊犁一矿为工程背景,设计了物理模型试验,建立了渗水条件下厚砾石层斜井围岩破坏机理模型试验方法.实现了渐进加载作用下渗流状态时井筒围岩塌方破坏过程的试验模拟,并结合模型试验结果对渗流状态下井筒围岩破坏过程及破坏过程中围岩应力和围岩位移变化规律进行了分析.研究结果表明,渗流条件下,非耦合支护厚砾石层巷道顶板离层现象明显,围岩顶板下沉量大于两帮围岩位移量,支架上承受的荷载明显增加;同时由于围岩的自承力明显减少,强度明显较低,支架受力就会变得很大,支架容易失稳;不同级渗流条件下,渐进加载时顶板土压力变化最为明显也最大,两帮的土压力次之.Under the engineering background of the First Mine of Yili in Xinjiang Municipality, the physical model test was designed and the method of failure mechanism of the surrounding rock of oblique laneway in thick gravel stratum with water was found. The test simulation of the failure process of the surrounding rock under progressive load and seepage condition was carried out successfully. Finally the model test results of the progressive failure process of the surrounding rock under seepage, the laws of the stress of surrounding rock and the pressure of the bracket and their displacement during the collapse were analyzed. The results show that roof separation phenomenon of thick gravel bed is evident under the condition of uncoupled support and seepage. Subsidence of roof surrounding rock is bigger than roadways sides. The loading on supports increases obviously, meanwhile because of the decreased tolerance of surrounding rock and then the intension turns to be lower significantly, the supports pressure increases soon, the supports instability easily. The pressure of the soil on roof has the most obvious and biggest change under gradually loading, followed with the two sides.

关 键 词：厚砾石层 围岩破坏机理 渗流 

分 类 号：TD322[矿业工程—矿井建设]