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An experimental investigation on acoustic emission characteristics of sandstone rockburst with different moisture contents 被引量:9

An experimental investigation on acoustic emission characteristics of sandstone rockburst with different moisture contents
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摘要 Rockburst occurred frequently during deep mining in China. The mechanism of rockburst is very complicated and related to many factors. In order to investigate the influence of moisture contents of rockmass on rockburst, we conducted a series of laboratory rockburst experiments of sandstone under three different moisture contents by the Modified True-Triaxial Apparatus (MTTA),in which the acoustic emission (AE) system was employed to monitor the internal damage of rock mass. A high-speed video camera was utilized to record the detail of rockburst. Based on the experimental results, the AE characteristics, such as AE count,AE energy, and AE frequency, were analyzed. The rockburst process, type, and indensity under different moisture contents were discussed. The research results show that with the increase of moisture contents, rock strength was soften, the elastic and the cumulative damage of the rock were reduced, resulting in a gradual decrease in AE cumulative counts and cumulative energy over the course of rockburst. This study provides an experimental basis and reference for better understanding to the rockburst mechanism and control.
出处 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2016年第10期1549-1558,共10页 中国科学(技术科学英文版)
基金 supported by the National Natural Science Foundation of China (Grant Nos. 51374214 , 51134005 & 51574248) the Special Fund of Basic Research and Operating of China University of Mining & Technology, Beijing (Grant No. 2009QL03) the State Scholarship Fund of China
关键词 SANDSTONE ROCKBURST moisture contents acoustic emission mechanical characteristics 声发射特性 实验室实验 岩爆过程 含水砂岩 声发射能量 水分含量 岩石强度 累积损伤
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