浅埋煤层黏土隔水层下行裂隙弥合研究  

Study of Downward Crack Closing of Clay Aquiclude in Shallowly Buried Coal Seam

作　　者：黄庆享[1] 蔚保宁[1] 张文忠[1] 

机构地区：[1]西安科技大学能源学院,陕西西安710054

出　　处：《采矿与安全工程学报》2010年第1期35-39,共5页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50574074);教育部留学回国人员科研启动基金项目(教外司留2008-890)

摘　　要：通过对隔水层土样实验,获得了离石黄土和三趾马红土的应力应变全程曲线、渗透系数和膨胀率.基于考虑黏土应力应变全程相似和水理性相似的固液耦合相似模拟,揭示了浅埋煤层长壁开采覆岩采动裂隙带分布规律,发现了"上行裂隙"和"下行裂隙"是隔水层稳定性的主要因素,"下行裂隙"是潜水流失的主要通道之一.发现了隔水层土体膨胀性将产生的"裂隙弥合"现象,可减缓"下行裂隙"的发展.建立了"下行裂隙"模型,给出了"下行裂隙"弥合判据,为隔水层稳定性和保水开采研究提供了理论依据.According to the mechanical experiment on soil samples from an aquifuge,the stress and strain curve and permeability as well as expansibility of Lishi loess and Hipparion red clay have been obtained.Based on similar simulation of solid and liquid coupling and the similarity of whole stress and stain curve and water reaction feature of clay aquifuge,the law of long wall mining the crackd zones in overburden strata of the shallowly buried seam is revealed.The result shows that"upward crack"and "downward crack...

关 键 词：浅埋煤层 保水开采 隔水层 裂隙 弥合 

分 类 号：TD315[矿业工程—矿井建设]