Comprehensive evaluation of rockburst risk by multiparameter characteristics based on microseismic signals: A case study

IF 3.5 3区 工程技术 Q3 ENERGY & FUELS
Yong-yuan Li, Xin-yuan Tian, Xiu-feng Zhang, Shun Hu, Rupei Zhang
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Abstract

Nowadays, the seismological monitoring system in China is a valuable tool in the rockburst risk evaluation for deep coal mines. In the past, only parameters, like source location and energy, are widely used to estimate the risk level of rockburst. Sometimes, it is effective; however, some other important physical parameters, such as apparent stress drop, static stress drop, P-wave velocity, and moment tensor, should also be included in order to improve the accuracy of risk assessment. In this study, these parameters are calculated using mine tremor signals recorded in the LW35001 workface of Liangbaosi Coal Mine. These calculations provide an overall identification of periodical stress distribution and rock mass energy-releasing type under high concentrated stress. Via linear moment tensor inversion procedure, the source mechanism of mine tremors and stress state of the rock mass is determined whether it is risk or not to underground roadway. This comprehensive analysis provides a specific guidance for rockburst prevention for coal mine management, that is, knowing when and where measures must be taken to decrease the risk level or induce the occurrence of rockburst under control.

Abstract Image

基于微地震信号的多参数特征综合评估岩爆风险:案例研究
目前,中国的地震监测系统是深部煤矿岩爆风险评估的重要工具。过去,只有震源位置和能量等参数被广泛用于估算岩爆风险等级。这种方法有时是有效的,但为了提高风险评估的准确性,还应包括其他一些重要的物理参数,如视应力降、静应力降、P 波速度和力矩张量等。本研究利用梁宝寺煤矿 LW35001 工作面记录的矿震信号计算了这些参数。这些计算可全面识别高集中应力下的周期应力分布和岩体能量释放类型。通过线性力矩张量反演程序,确定了矿井震源机制和岩体应力状态对井下巷道的危险与否。这一综合分析为煤矿管理中的岩爆预防提供了具体指导,即了解何时何地必须采取措施降低岩爆风险水平或促使岩爆发生在可控范围内。
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来源期刊
Energy Science & Engineering
Energy Science & Engineering Engineering-Safety, Risk, Reliability and Quality
CiteScore
6.80
自引率
7.90%
发文量
298
审稿时长
11 weeks
期刊介绍: Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.
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