摘要
矿震应力波传播衰减规律是准确评估矿震致灾性的重要理论基础。为明确煤矿矿震的震动效应,并为矿震风险评估提供理论依据,开展了矿震应力波传播衰减理论模型及其应用的研究。首先,建立考虑几何衰减系数、材料衰减系数和地应力影响的矿震应力波传播衰减理论模型。随后,以石拉乌素煤矿为工程背景,采取室内试验与现场监测相结合的方法,测定了地层材料衰减系数,研究地应力对传播衰减模型的影响,构建了适用于该矿的矿震应力波传播衰减模型,并将该模型应用于现场矿震震级的估算,验证了模型的可靠性。研究结果表明:模型中几何衰减系数与矿震震级、波阵面的扩散以及应力波在非连续面中的散射相关;材料衰减系数与地层介质黏弹性、地层波速和应力波频率有关,地应力对传播衰减模型材料衰减系数有显著影响。基于提出的矿震应力波传播衰减模型,估算了石拉乌素煤矿矿震震级,与地震局预报的震级结果具有较好的一致性,验证了该模型在实际应用中的可靠性。根据应力波传播衰减理论模型和震级能量关系,得到了不同震级矿震的应力波传播衰减规律的预测结果。研究结果为理解矿震应力波传播衰减规律提供了理论基础,对评价矿震风险具有指导意义。
The attenuation behavior of seismic wave propagation during mining-induced seismicity is fundamental for accurately assessing its disaster potential.This study investigates the vibration characteristics of mining-induced seismicity in coal mines and develops a theoretical framework for assessing seismic risks.A theoretical model of seismic wave attenuation in mining-induced seismicity is developed,incorporating geometric attenuation coefficients,material attenuation coefficients,and the influence of in-situ stress.Taking the Shilawusu Coal Mine as a representative case,this study systematically quantifies the attenuation coefficients of strata materials through a combination of laboratory experimentation and field monitoring.Additionally,it rigorously evaluates the influence of in-situ stress on the attenuation dynamics of mining-induced seismicity and formulates a propagation attenuation model specifically tailored to its characteristics in the Shilawusu Coal Mine.Subsequently,with the Shilawusu Coal Mine as the engineering background,this study employs a combination of laboratory experiments and field monitoring to determine the attenuation coefficients of strata materials,analyze the influence of in-situ stress on the propagation attenuation model,and construct a propagation attenuation model tailored to mining-induced seismicity in this mine.The model is further applied to estimate the seismic magnitude of mining-induced events,and its reliability is validated through field observations.The results indicate that the geometric attenuation coefficient is affected by the seismic magnitude,the diffusion of the wavefront,and the scattering of stress waves at discontinuous surfaces.The material attenuation coefficient is determined by the viscoelastic properties of the rock,the velocity model of the strata,and the frequency of stress waves induced by seismicity.In-situ stress directly influences the velocity of the strata,thereby indirectly affecting the material attenuation coefficient in the model.Based on the proposed propagation attenuation model for stress waves induced by mining-induced seismicity,the seismic magnitudes of events in the Shilawusu Coal Mine were estimated and demonstrated good agreement with the magnitude forecasts provided by the Earthquake Administration,validating the model's reliability in practical applications.Furthermore,the propagation attenuation behavior of stress waves for different seismic magnitudes was predicted using the theoretical attenuation model and the relationship between seismic magnitude and energy.These findings provide a theoretical basis for understanding the propagation attenuation laws of stress waves induced by mining-induced seismicity and offer valuable guidance for assessing seismic risks in mining operations.
作者
朱建波
郑福润
谢和平
周宏伟
张茹
马斌文
张修峰
公维国
ZHU Jianbo;ZHENG Furun;XIE Heping;ZHOU Hongwei;ZHANG Ru;MA Binwen;ZHANG Xiufeng;GONG Weiguo(State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,Shenzhen University,Shenzhen 518060,China;Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Shenzhen University,Shenzhen 518060,China;Institute of Deep Earth Sciences and Green Energy,Shenzhen University,Shenzhen 518060,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China;Shandong Energy Group Co.,Ltd.,Jinan 250014,China)
出处
《采矿与岩层控制工程学报》
北大核心
2025年第2期18-31,共14页
Journal of Mining and Strata Control Engineering
基金
国家重点研发计划资助项目(2022YFC3004602)
国家自然科学基金资助项目(52325404)
珠江人才计划引进创新创业团队资助项目(2019ZT08G315)
山东能源集团2022年揭榜挂帅资助项目(SNKJ2022A01-R26)
深圳市基础研究资助项目(JCYJ20220818095605012)
深圳大学2035卓越研究计划资助项目(2022B001)。
关键词
矿震
应力波
传播衰减模型
地应力
峰值振动速度
mining-induced seismicity
stress wave
propagation attenuation model
in-situ stress
peak particle velocity
