An experimental investigation on acoustic emission characteristics of sandstone rockburst with different moisture contents

Sun, XiaoMing; Xu, HuiChen; Zheng, LianGe; He, ManChao; Gong, WeiLi

doi:10.1007/s11431-016-0181-8

Title: An experimental investigation on acoustic emission characteristics of sandstone rockburst with different moisture contents

Journal Article · Mon Sep 19 00:00:00 EDT 2016 · Science China Technological Sciences

DOI:https://doi.org/10.1007/s11431-016-0181-8· OSTI ID:1571929

Sun, XiaoMing ^[1]; Xu, HuiChen ^[2]; Zheng, LianGe ^[3]; He, ManChao ^[1]; Gong, WeiLi ^[1]

China Univ. of Mining & Technology, Beijing (China). State Key Lab. for Geomechanics and Deep Underground Engineering
China Univ. of Mining & Technology, Beijing (China). State Key Lab. for Geomechanics and Deep Underground Engineering, and School of Mechanics and Civil Engineering
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Geosciences Division

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. Finally, this study provides an experimental basis and reference for better understanding to the rockburst mechanism and control.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1571929

Journal Information:: Science China Technological Sciences, Vol. 59, Issue 10; ISSN 1674-7321

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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