相似材料煤样单轴压缩声发射试验及数值模拟研究  

Acoustic Emission Test and Numerical Simulation on Similar Coal Samples Under Uniaxial Compression

作　　者：朱昌星[1] 赵伟浩 刘旭 ZHU Changxing;ZHAO Weihao;LIU Xu(School of Civil Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003,China)

机构地区：[1]河南理工大学土木工程学院,河南焦作市454003

出　　处：《矿业研究与开发》2023年第2期133-137,共5页Mining Research and Development

基　　金：国家自然科学基金资助项目(51874119)。

摘　　要：以平煤股份二矿庚一轨道巷为背景,采用水泥、石膏及全粒径煤粉配比相似材料煤样,通过单轴压缩声发射试验及颗粒流软件(PFC3D)模拟试验,分析单轴压缩声发射试验相似材料煤样力学特性及其裂纹演化过程。研究结果表明:相似材料配比煤样的应力-应变曲线与原煤类似,破坏模式为沿斜截面剪切破坏;PFC3D模拟得到的应力-应变曲线及试样破坏模式与配比煤样相似。Taking the Gengyi track roadway in No.2 Coal Mine of Pingmei Coal Group Co., Ltd. as the background, the mechanical properties and crack evolution process of similar coal samples in uniaxial compression acoustic emission test and particle flow software(PFC3D) simulation test were analyzed by using cement, gypsum and full-size pulverized coal for preparation. The results show that the stress-strain curve of similar coal samples is similar to that of raw coal, and the failure mode is shear failure along the inclined section. The stress-strain curve and failure mode of the samples obtained by PFC3Dsimulation are similar to those of the coal samples with different proportions.

关 键 词：相似材料 单轴压缩 声发射 PFC3D 裂纹演化 

分 类 号：TD315[矿业工程—矿井建设]