底板隔水层岩性组合特征对隔水性能的影响  

Effect of Lithologic Association of the Water-Resisting Strata in Coal Seam Floor on Water Insulating

作　　者：冯梅梅[1] 茅献彪[1] 朱庆华[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,力学与建筑工程学院,江苏徐州221008 [2]徐州矿务集团张双楼矿,江苏徐州221000

出　　处：《采矿与安全工程学报》2010年第3期404-409,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2007CB209400);国家自然科学基金项目(50574090,50874103,50904065);国家自然科学基金重点项目(50634050,50834004)

摘　　要：带压开采是解决受底板突水威胁煤层的有效方法之一;而底板隔水层阻隔水能力是影响带压开采安全性的重要因素.运用理论分析、物理试验和数值模拟手段,就底板隔水层的不同岩层岩性特征对其阻隔水性能的影响进行研究,得到了工作面推进过程中底板隔水岩层的变形、应力及破坏特征和渗流分布特征,讨论了3种组合情况下底板隔水层的结构稳定性和渗流稳定性,比较分析了软、硬岩层的不同组成方式对底板隔水性能的影响.Mining above aquifer is one of the effective methods for which the mining is threatened by water-inrush from floor. The water insulating effect of the water-resisting strata in coal seam floor is one of important factors affecting the safety in mining above aquifer. In order to analyze, numerical simulation and physical modeling are applied to study systematically the effect of the lithologic characteristic of the water-resisting strata in coal seam floor on its water insulating effect, and obtain the parameters of deformation, stress distribution, failure characteristic, and the seepage distribution of the water-resisting strata in coal seam floor. And then, the structural stability and seepage stability of the water-resisting strata with three different lithologic association are discussed and the effect of the combination of both soft rock and hard rock beds on the water insulating effect of water-resisting strata in floor are compared and analyzed.

关 键 词：底板突水 带压开采 底板隔水层 渗流稳定性 阻隔水性能 

分 类 号：TD325[矿业工程—矿井建设]