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工程试验。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方案。试验结果表明,底抽巷与回风平巷之间平距0 m、垂距10 m时,能同时很好地兼顾巷道稳定性与瓦斯抽采要求。
In order to determine reasonable position of floor gas drainage roadway, the distribution characteristics of stress field and displacement field of the floor gas drainage roadway and mining roadway with different spatial position are analyzed based on FLAC3D numerical simulation, the layout schemes of every floor gas drainage roadway are conducted gas extraction engineering test. Based on AHP and fuzzy e- valuation method, the surrounding stability of floor gas drainage roadway and mining roadway and gas ex- traction effect are regarded as the first grade indicators, and the second grade indicators are also selected so as to establish the comprehensive evaluation model to determine the determine the perfect layout scheme of floor gas drainage roadway. The test result show that when horizontal distance and vertical dis- tance between floor gas drainage roadway and mining roadway are 0 m and 10 m respectively, which can meet the requirements of surrounding rock stability and gas extraction.
出处
《现代矿业》
CAS
2015年第11期24-27,共4页
Modern Mining
关键词
底抽巷位置选择
层次分析
数值模拟
AHP
Selection of floor gas drainage roadway, Analytic hierarchy, Numerical simulation, AHP
