弱胶结砂岩破坏规律及其声发射特性试验研究  

Experimental Study on Deformation and Failure Laws and Acoustic Emission Characteristics of Weak Cemented Sandstone

作　　者：任建喜[1] 景帅 刘朝科[1] REN Jian-xi;JING Shuai;LIU Chao-ke(Department of Architecture and Civil Engineering,Xi′an University of Science and Technology,Xi′an 710054, China)

机构地区：[1]西安科技大学建筑与土木工程学院

出　　处：《煤炭技术》2019年第6期1-4,共4页Coal Technology

基　　金：国家自然科学基金项目资助(11872299;11802230);陕西省科技计划项目资助(2016XT-04;2016XT-25;2017GY-156;2018JQ5122)

摘　　要：为探究煤矿巷道软弱围岩的变形规律,以彬长矿区某矿为研究对象,研究其顶板弱胶结砂岩在饱水状态下的三轴-声发射特性,分析其塑性变形破坏规律和不同应力阶段声发射特征,得到饱水弱胶结砂岩破坏过程中声发射演化规律。分析结果可为预测弱胶结砂岩变形破坏趋势提供理论依据,为控制同类砂岩顶板变形提供可行性方法。In order to investigate the deformation law of weak surrounding rock in coal mine roadway, a certain mine in Binchang mining area was taken as the research object to study the triaxial-acoustic emission characteristics of the weakly cemented sandstone in the saturated state of the roof, and the plastic deformation and failure rules were analyzed. The characteristics of acoustic emission in the stress stage were used to obtain the acoustic emission evolution during the failure of saturated sandstones with weak cementation. The analysis results can provide a theoretical basis for predicting the deformation and failure trend of weakly cemented sandstone, and provide a feasible method for controlling the deformation of the same type of sandstone roof.

关 键 词：弱胶结砂岩 围压 声发射 残余强度 峰值 

分 类 号：TD315[矿业工程—矿井建设]