跨采影响下巷道围岩变形力学机制及其控制技术  

Surrounding rock deformation mechanism and control technology of roadway influenced by working across over roadway

作　　者：刘洪涛[1] 镐振[1,2] 吴祥业[1] 郭林峰[1] 刘洋[1] 王建宗[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京市海淀区100083 [2]河南能源化工集团焦煤公司赵固二矿,河南省新乡市453633

出　　处：《中国煤炭》2016年第7期29-34,共6页China Coal

基　　金：国家自然科学基金资助项目(51234005;51434006)

摘　　要：以鹤煤公司九矿东总回风巷为工程背景,采用理论分析和数值模拟方法研究了跨采期间巷道围岩应力、位移和塑性区的变化特征。结果表明,跨巷采动导致巷道围岩垂直水平应力比值发生变化,应力比值最大为1.34,是巷道发生变形破坏的主因;巷道最大破坏部位位于顶板与底板部位,顶板破坏深度已超过锚杆锚固范围,底板破坏深度为3 m左右,并因缺乏支护导致底鼓。因此,必须在跨采工作面回采前,对顶底板进行加固,使塑性破坏区域位于锚固范围以内。Taking eastern main return airway in No. 9 Mine of Hebi Coal Industry Co. , Ltd. as the engineering background, change characteristics of surrounding rock stresses, displacement and plastic zone of roadway during working across over roadway were studied by methods of theoretical analysis and numerical simulation. The results showed that the ratio of vertical stress and horizontal stress was changed during working across over roadway, and the maximum value of the ratio was 1.34, which was the main reason of deformation. The largest deformation of roadway generated in the roof and floor, the failure depth in roof was beyond the rock bolting and the floor failure depth was nearly 3 m which resulted in floor heave. So before working across over roadway, the roof and floor needed to he strengthened to make sure that the plastic zone was within the range of rock bolting.

关 键 词：跨采工作面 巷道支护 锚注 U型钢支架 数值模拟 围岩变形 

分 类 号：TD353[矿业工程—矿井建设]