富水厚砾石层斜井围岩破坏机理试验研究(Ⅱ)  

Test study on failure mechanism of the surrounding rock of inclined shaft in thick gravel stratum with abundant water (Ⅱ)

作　　者：岳中文[1,2] 杨仁树[1,2] 孙中辉[2,3] 窦波洋[2] 杨立云[2] 

机构地区：[1]深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]新汶矿业集团,山东新泰271233

出　　处：《煤炭学报》2010年第8期1273-1278,共6页Journal of China Coal Society

基　　金：国家科技支撑计划资助项目(2007BAK24B00)

摘　　要：以新疆伊犁一矿为工程背景,设计了物理模型试验内容,建立了富水厚砾石层斜井围岩破坏机理模型试验方法。实现了加载作用下富水裸巷围岩破坏过程的试验模拟,并结合模型试验结果对围岩破坏过程中围岩压力、位移和孔隙水压力变化规律进行了分析。研究结果表明,在富水砾石层斜井开挖过程中,井筒围岩塌方破坏从拱顶开始,并逐渐向上发展;井筒开挖过程中,围岩应力总体呈下降趋势变化,围岩破坏过程中,拱顶和两帮垂直、水平应力均呈减小趋势变化,但底板和底角水平应力呈增加趋势变化;拱顶围岩位移变化量大于侧帮位移量,底板位移量最小;孔隙水压最大时,拱顶发生冒落,渗水是导致井筒围岩最终破坏的主要因素。Under the engineering background of the First Mine of Yili in Xinjiang,the physical model test was designed and the method of failure mechanism of the surrounding rock of inclined shaft in thick gravel stratum with abundant water was investigated in detail.The test simulation of the failure process of the scale model surrounding rock under external applied load and seepage condition was carried out successfully.Combined with the model test results of the failure process of the surrounding rock under seepage,the surrounding rock stresses,displacement and pore water pressure were analyzed.The results show that the destruction of surrounding rock from the dome begins to collapse,and gradually move upwards in the excavation process of inclined shaft in water-rich gravel layer.The stress of wall rock declines in the shaft excavation process.The vertical and horizontal stress of the vault and the two sides are reduced in rock failure process,but the horizontal stress of the bottom and the bottom corner increases.The displacement value of vault wall rock is bigger than that of well sides,among them that of soleplate is least.The displacement value of wall rock is evidently affected by seepage,when the pore water pressure reaches the maximum value,the vault damage occurs.The seepage is the main factor of wall rock failure.

关 键 词：富水厚砾石层 斜井 围岩破坏机理 

分 类 号：TD315.3[矿业工程—矿井建设]