基于扰动状态理论的回采巷道稳定性分析  

Analysis of gateroad stability in underground coal mining based on disturbed state theory

作　　者：赵毅鑫[1,2] 姜耀东[1,2] 张科学[3] 王宏伟[2] 田素鹏 

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,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]中国矿业大学(北京)资源与安全工程学院,北京100083 [4]河北省建筑科学研究院,河北石家庄050011

出　　处：《中国矿业大学学报》2014年第2期233-240,共8页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划(973)项目(2010CB226804;2010CB226801);国家自然科学基金项目(51174213);新世纪优秀人才项目(NCET-10-0775);中央高校基本科研业务费专项资金项目(2009QM01)

摘　　要：为定量评价不同回采阶段对煤层巷道稳定性的影响,以宁东矿区任家庄矿11501和11503工作面回采巷道为研究对象,根据现场监测数据,引入扰动状态理论中扰动因子D的概念,探讨了回采巷道受本区段回采(一次扰动)、上区段和本区段回采(二次扰动)的影响情况,并基于数值模拟和高精度地质雷达对所研究回采巷道不同位置处的围岩松动圈进行了分析和实测.结果表明:基于围岩变形的扰动因子具有较好的物理意义,能够用于分析不同开采阶段不同巷道受扰动情况;扰动因子D越大,回采对巷道稳定性影响越大;当受一次扰动的回采巷道扰动因子D≥0.7时和受二次扰动的回采巷道扰动因子D≥0.6时,巷道稳定性均需加强安全预警.In order to evaluate the impact of mining on the stability of gateroads, the disturbed state theory was introduced and the disturbance factor D was calculated based on the in-situ monitoring data of ground pressure in the gateroads at No. 11501 and No. 11503 panels in Reji- azhuang mine. The stability of gateroads influenced by different mining sequence of sublevels was also discussed. A comparative analysis was carried out based on the data acquired by nu- merical simulation and in-situ high-precision ground penetrating radar survey. The results show that the disturbance factor on the deformation of gateroads can be used to analyze the mining impacts on gateroad stability. The greater of disturbance factor D, the greater of min- ing impact on stability of gateroads. For gateroads subjected to one-pass or two-pass disturb- ance by sublevel mining, and if the disturbance factor is D≥0.7 and D≥0.6 respectively, the stability of gateroads need to be improved.

关 键 词：扰动状态理论 扰动因子 回采巷道 稳定性 松动圈 

分 类 号：TD353[矿业工程—矿井建设]