瓦斯吸附作用下煤岩力学行为及声-电荷反演

doi:10.16265/j.cnki.issn1003-3033.2018.07.014

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (7): 82-87.doi: 10.16265/j.cnki.issn1003-3033.2018.07.014

瓦斯吸附作用下煤岩力学行为及声-电荷反演

肖晓春教授, 王磊, 吴迪副教授, 丁鑫, 樊玉峰, 赵宝友副教授

辽宁工程技术大学力学与工程学院,辽宁阜新 123000

收稿日期:2018-04-20 修回日期:2018-06-09 出版日期:2018-07-28 发布日期:2020-11-25
作者简介:肖晓春(1979—),男,内蒙古化德人,博士,教授,博士生导师,主要在矿业工程领域从事煤矿动力灾害机制及预警、预测和低渗储层煤层气运移规律相关增采方法的研究。E-mail:xxc7902@163.com。
基金资助:
国家自然科学基金资助(51374123,51504122,51774164);辽宁省教育厅一般项目(LJYL045)。

Mechanical behavior and acoustic-charge inversion ofcoal rock under gas adsorption

XIAO Xiaochun, WANG Lei, WU Di, DING Xin, FAN Yufeng, ZHAO Baoyou

School of Mechanics and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China

Received:2018-04-20 Revised:2018-06-09 Online:2018-07-28 Published:2020-11-25

摘要/Abstract

摘要： 为深入探究不同瓦斯吸附压作用下的煤岩力学行为及声-电荷反演规律,完善冲击-突出复合灾害的预测预警方法,以阜新孙家湾矿168工作面煤样为研究对象,利用载荷-声-电-应变复合监测系统对不同瓦斯吸附压力作用下的试样的力学特性、破坏特征、冲击-突出特征及声-电信号反演进行试验研究。结果表明:随瓦斯吸附压力增大,瓦斯煤岩冲击倾向指标均降低,应力峰前调整逐渐增多,煤岩峰值破坏时间延长,煤体内部损伤、软化程度及破碎程度升高,煤体动力灾害存在冲击向突出转化的可能;监测获得的声-电荷高幅值信号在时间序列上与煤体应力状态呈现较好对应关系,能够反演瓦斯煤岩的力学特征。

关键词: 瓦斯吸附压力, 力学行为, 破坏特征, 冲击倾向性, 声-电荷信号

Abstract: In order to further explore the mechanical behavior of coal and the inversion law of acoustic-charge under different gas adsorption pressures,and improve the method of predicting and warning of shock-outburst complex disaster,coal samples were selected from the 168 working face of Sunjiawan mine in Fuxin,and their mechanical properties,shock-outburst characteristics and acoustic-charge inversion process under different gas adsorption pressures were investigated by using an acomposite monitoring system of load-acoustic-charge-strain.The results show that with the increase of gas adsorption pressure,the impact tendency index of gas coal decreases,and the adjustment of stress before peak stress increases gradually,and the peak failure time of gas coal is prolonged,the degrees of internal damage,softening and breaking of coal sample also increase,and the dynamic disaster of gas coal likely changes from an impact into an outburst,and that the acoustic-charge high amplitude signal obtained from monitoring system has a good correspondence relationship with coal stress state in time series,and could reflect the mechanical characteristics of gas coal.

Key words: gas adsorption pressure, mechanical behavior, failure characteristics, impact tendency, acoustic charge signal

中图分类号:

X936

肖晓春, 王磊, 吴迪, 丁鑫, 樊玉峰, 赵宝友. 瓦斯吸附作用下煤岩力学行为及声-电荷反演[J]. 中国安全科学学报, 2018, 28(7): 82-87.

XIAO Xiaochun, WANG Lei, WU Di, DING Xin, FAN Yufeng, ZHAO Baoyou. Mechanical behavior and acoustic-charge inversion ofcoal rock under gas adsorption[J]. China Safety Science Journal, 2018, 28(7): 82-87.

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瓦斯吸附作用下煤岩力学行为及声-电荷反演

Mechanical behavior and acoustic-charge inversion ofcoal rock under gas adsorption

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