摘要
为确定特定条件下底抽巷的合理位置,基于FLAC3D分析了底抽巷与回采巷道不同空间位置关系下的应力与位移场分布特征,同时对各个底抽巷布置方案进行瓦斯抽采试验。基于层次分析与模糊评价,以底抽巷、回采巷道围岩稳定性与瓦斯抽采效果为一级指标,并选取相应的二级指标,建立综合评判模型,确定底抽巷的最佳位置。试验结果表明,底抽巷与被保护的回采巷道之间平距5 m、垂距10 m时,能同时兼顾巷道稳定性与瓦斯抽采要求。
To determine reasonable position of floor gas drainage roadway,based on FLAC3D numerical simulation software,the distribution laws of stress fields and displacement fields were analyzed when the position relation between floor drainage roadway and coal wining roadway are different,gas drainage effect of every designed plans about floor drainage roadway were also tested. Based on AHP and fuzzy mathematics, the first grade assessment indicators of judging model are surrounding rock stability of floor gas drainage roadway and mining roadway, and gas drainage effect, the second grade assessment indicators were also selected, the floor gas drainage roadway position judging model was established to determine the best gas drainage roadway position. Experimental results shows that, when horizontal distance and vertical distance between floor gas drainage roadway and mining roadway respectively are 0 m and 10 re,the position plan can meet requirements of surrounding rock stability and gas drainage.
出处
《中州煤炭》
2015年第7期1-5,66,共6页
Zhongzhou Coal
基金
"十二五"国家科技重大专项课题资助项目(2011ZX05041-004)
(2011ZX05040-003-003)
关键词
底抽巷
层次分析
模糊数学
数值模拟
floor gas drainage roadway
AHP
fuzzy mathematics
numerical simulation
