向斜构造区巷道底板冲击机理与防治  

Impact Mechanism and Control of Roadway Floor in Syncline Structure Area

作　　者：芦庆和 钟诗颖 刘义宗 

机构地区：[1]贵州理工学院矿业工程学院,贵州贵阳550003 [2]贵州省凯里市安全生产监督管理局,贵州凯里556000

出　　处：《煤矿安全》2017年第9期197-200,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51564004)

摘　　要：以某矿N_2105工作面回采过程中进风巷穿过向斜构造区发生的2次底板冲击为研究对象,理论分析了巷道底板失稳破坏机理,并数值模拟了水平应力集中系数与底板塑性区的变化关系。研究结果表明:水平应力集中系数越高,底板越容易产生滑移变形鼓起;底板的冲击破坏是动静载叠加引起的;煤体大直径钻孔卸压能够有效卸压,从而抑制巷道底板冲击。Taking two times of floor impact in N2105 working face of a mine in the mining process of intake airway passing through syncline structure zone as study object, we theoretically analyze the failure mechanism of roadway floor, and numerically simulate relationship between horizontal stress concentration factor and the change of floor plastic zone. The results show that the higher the horizontal stress concentration coefficient, the more likely to produce a sliding deformation of floor; floor impact damage is caused by superposition of static and dynamic load; large diameter drilling and pressure relief can effectively release pressure to control the roadway floor impact.

关 键 词：向斜构造区 底板冲击 数值模拟 应力集中系数 卸压 底鼓 

分 类 号：TD322.1[矿业工程—矿井建设]