School of Mining Engineering, China University of Mining and Technology Stata Key Lab of Coal Resources and
Safety Mining, China University of Mining and Technology

针对棋盘井煤矿工作面巷道底鼓严重的问题,采用现场地质调研、理论解析、数值模拟的方法分析了巷道底鼓的主要影响因素,得出了软弱、无支护和应力集中是巷道底鼓的根本原因,发现了原支护条件下巷道围岩呈不均匀收缩状态,揭示了巷道底板是巷道围岩破坏的危险位置,提出了承压支护系统。结果表明:承压支护系统体现了支护结构与底板围岩的协同作用,巷道底鼓量由支护前的800 mm减小到400 mm,承压支护系统有效控制了巷道底鼓。

According to serious floor heave problems in mining roadway of Qipanjing Mine, the field geological investigation, theoretical analysis and numerical sim ulation method were applied to analyze maijor influence factors of floor heave. The research acquired that weak floor, non-support and stress concentration were primar y factors causing floor heave, and found differential shrinkage state of roadway surrounding rock in the original support conditions. Meanwhile, the study ilustrated that roadway floor was the weak position of roadway surrounding rock destruction, and then put forward bearing-pressure support system. The results showed that the beari ng-pressure support system had reflected synergistic effect between support structure and floor surrounding rock. Floor heave value decreased from 800 mm to 400 m m, which showed that the bearing-pressure support system had good support effects and had controlled roadway floor heave effectively.

国家自然科学基金资助项目(51204166,51174195)；江苏省高校优势学科建设工程资助项目(SZBF2011-6-B35)；江苏省普通高校研究生科研创新计划资助项目(CXZZ12_0954)；