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《Chinese Journal of Underground Space and Engineering》 2017-03
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Experimental Research on Acoustic Emission Characteristics of Argillaceous Siltstone Failure under Different Moisture Contents

Zhang Anbin;Liu Xiangxin;Zhang Yanbo;Tian Baozhu;Faulty of Resources & Safety Engineering,China University of Mining & Technology;College of Mining Engineering,North China University of Science and Technology;Department of Geology & Mining,CNNC;  
The uniaxial compressive and the acoustic emission(AE) tests have been taken on different moisture of argillaceous siltstone,including the state of dry,natural and saturated.The difference of rock rupture mechanics characteristics and AE characteristics on three moisture contents has been developed.The results show that the presence of water makes argillaceous siltstone softening damage intensity,the peak stress and elastic modulus decrease with the increase of the water content,the characteristic of deformation transfer form brittle to ductile;AE accumulative events,AE events rate peak,AE accumulative absolute energy and AE absolute energy rate peak decrease with the increase of the water content,namely the presence of water makes the damage or broken degree of argillaceous siltstone decrease,and the energy release level in whole failure of rock reduce;According to the curves of AE accumulative events and AE accumulative absolute energy changing with time,it turns out that the presence of water makes the failure of argillaceous siltstone transfer form the brittle type of sudden to the ductile of stable.
【Key Words】: rock mechanics argillaceous siltstone different water moisture acoustic emission absolute energy
【Fund】: 国家级大学生创新创业训练计划项目(201210081001);; 河北省教育厅自然科学基金(QN2014067);; 教育部高校博士学科专项科研基金(20120023110023);; 中央高校基本科研业务费专项资金资助(2014QZ03)
【CateGory Index】: TU45
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