循环载荷下煤样声发射特征及渗透率变化规律研究  

Study on acoustic emission characteristics and permeability change law of coal samples under cyclic loading

作　　者：郭军杰 邹友平[3,4] 程晓阳[5,6] GUO Junjie;ZOU Youping;CHENG Xiaoyang(School of Safety Engineering,Henan University of Engineering,Zhengzhou 451191,China;State and Local Joint Engineering Laboratory for Gas Drainage&Ground Control of Deep Mines,Henan Polytechnic University,Jiaozuo 454000,China;Coal Mining&Designing Department, Tiandi Science&Technology Co.,Ltd.,Beijing 100013,China;Mining Institute Branch,China Coal Research Institute,Beijing 100013,China;National Key Laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;Chongqing Research Institute,China Coal Technology Engineering Group,Chongqing 400037,China)

机构地区：[1]河南工程学院安全工程学院,河南郑州451191 [2]河南理工大学深井瓦斯抽采与围岩控制技术国家地方联合工程实验室,河南焦作454000 [3]天地科技股份有限公司开采设计事业部,北京100013 [4]煤炭科学研究总院开采研究分院,北京100013 [5]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [6]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《煤炭科学技术》2018年第10期105-109,共5页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2016ZX05045-003);2018年度河南省科技攻关资助项目(182102310738)

摘　　要：为了研究循环载荷下煤样声发射和渗透率变化特征,采用自主研发的三轴应力渗流试验系统,对煤样进行了不同应力水平循环加、卸载的声发射参数及渗透率测试,结果表明:声发射参数变化呈现较为明显的降低-稳定-增长3个阶段特征,其与循环次数的关系曲线呈"U"型,随上限应力水平的升高,曲线从"U"型向"V"型发展;煤层渗透率变化呈现较为明显的降低-稳定-增长3个阶段特征,其与循环次数的关系曲线也呈"U"型,随上限应力水平的升高,曲线从"U"型向"V"型发展;在煤样循环加载过程中,声发射参数变化与渗透率变化趋势一致,两者具有密切的关系。This paper presents the results of an experimental study of acoustic emission characteristics and permeability of coal samples under cyclic loading.The tests were conducted using self-developed triaxial stress seepage experiment system by tested under different stresses levels.The test results showed that both the acoustic emission and coal permeability followed a pattern of reducing-stabilizing-increasing under cyclic loading.The curves representing the relationship between the acoustic emission and cyclic times and the permeability and cyclic time also had the same pattern.Their pattern showed a“U”shape at first,then developed to a“V”shape as the increase of stress.It is concluded that varieties for the acoustic emission characteristics and permeability of the coal samples are consistent,and associated with each other under cyclic loading.

关 键 词：循环载荷 应力水平 渗透率 声发射 

分 类 号：TD313[矿业工程—矿井建设]