基于微震监测的地压活动规律和风险预测

 在介绍微震监测技术基本原理和系统组成架构基础上，以漂塘矿区为工程背景，借助统计学原理和地震学原理对其地压活动规律开展研究，分别从云图、地震参数时间曲线和地震统计b 值对矿山的448 中段进行风险评估，确认该中段特定区域为重点风险区域评估和预测区域。通过理论分析及实际结果表明，矿山地压活动与地下开采活动有着密切联系，开采活动是井下重要风险源之一。微震事件聚集区域与井下作业位置相对应，在时空上，微震事件活跃的高峰期与井下作业台班基本吻合。确定风险区域后，根据地震参数时间曲线分别设定观察期、预警期和危险期以减少损失。实践证明，微震监测系统可实现漂塘钨矿风险区域的岩体状态的全面监控，实现风险区域的监控和预警。

Risk Prediction and Law of Ground Pressure Activities Based on Seismic Monitoring System

This paper introduces the basic principle and system architecture of micro seismic monitoring technology from an engineering background of the Piaotang mine. The law of ground pressure activities in level 448 is studied and three steps based on different theories are involved. The event density contour plot is used for establishing the risk region. Observation period, prediction period and danger period are set up based on earthquake parameter time curves. The statistics of b value are made for checking the result. After that, the particular middle risk assessment of that area is performed by using the statistics and magnitude theory. Then the film clip stopped is confirmed with emphasis on the area of risk assessment and prediction area. Theoretical analysis and practical results show that the mine ground pressure activity is not only related to the time but also closely to underground mining activities. And the underground mining activity is an important risk resource in the underground environment. The seismic event concentrated area corresponds to the underground working position. The peak activity of seismic event is in accordance with stopping and developing machine-team in spatial and temporal domains. Those three periods are set up when determined based on earthquake parameter time curves. If so, less persons and property losses can be achieved. Combined with the current monitoring results and work, when the instability signal appears, the system can inform the miners, providing safeguard for mine safety production.