基于微震监测的采空区安全性分区分级研究
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摘要
基于矿山微震监测结果,首先分析了矿区范围微震活动性规律,结合微震事件的基本统计、空间分布、时间序列演化过程和敏感预警特征参数等多个指标,将监测范围内的采空区在空间上划分为4个分区,再对各分区范围的微震事件进行研究,采用频次特征、能量特征、时间序列特征、D-t分布特征、βn分布特征、η值特征、CUFIT模型特征多指标综合分析法,以权值评分的形式,对各分区的稳定性分别进行分级和评价。该方法充分发挥了微震监测信息量大、覆盖范围广、能对震源三维定位、进行预测预报等特点,为采空区稳定性评判、综合治理和安全管理提供了科学依据。
Based on the microseismic monitoring results of mine,the rules of microseismic activities were analyzed firstly.The monitoring area was divided into four regions with basic statistic,space distribution,time series and sensitive parameters of microseismic prediction.Then the microseismic events of each region were comprehensively analyzed by the multi indexes such as frequency,energy,time series,Dt distribution,βndistribution,ηvalue,CUFIT model etc.Finally the stability of each region was graded and evaluated by the form of weight value.This method,including rich information,broad covering,three-dimensional positioning for epicenter,risk prediction and other advantages,provided a scientific basis for the evaluation of goaf stability,comprehensive treatment and safety management.
Based on the microseismic monitoring results of mine,the rules of microseismic activities were analyzed firstly.The monitoring area was divided into four regions with basic statistic,space distribution,time series and sensitive parameters of microseismic prediction.Then the microseismic events of each region were comprehensively analyzed by the multi indexes such as frequency,energy,time series,Dt distribution,βndistribution,ηvalue,CUFIT model etc.Finally the stability of each region was graded and evaluated by the form of weight value.This method,including rich information,broad covering,three-dimensional positioning for epicenter,risk prediction and other advantages,provided a scientific basis for the evaluation of goaf stability,comprehensive treatment and safety management.
引文
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[8]张兴民,于克君,席京德,等.微震技术在煤矿两带监测领域的研究与应用[J].煤炭学报,2000,25(6):566-570.
[2]唐礼忠,潘长良,等.冬瓜山铜矿微震监测系统及其应用研究[J].金属矿山,2006(10):41-44.
[3]文兴.非连续复杂群采空区稳定性分析与治理方案研究[D].长沙:中南大学,2012.
[4]李庶林,尹贤刚,等.凡口铅锌矿多通道微震监测系统及其应用研究[J].岩石力学与工程学报,2005(12):2048-2053.
[5]Mendecki A J.Data-driven understanding of seismic rock mass response to mining[C]//In:G.van Aswegen,R.J.Durrheim,W.D.Ortlepp.ed.In:Proceedings of the 4th international symposium on rockbursts and mines,The South African Institute of Mining and Metallurgy,Johannesburg,2000:1-9.
[6]Ortlepp W D.RaSiM comes of age-a review of the contribution to the understanding and control of mine rockbursts[C]//In:Yves Potvin,Martin Hudyma ed.In:Proceedings of the 5th international symposium on rockbursts and mines.Nedlands:Australian Centre for Geomechanics Press,2005:3-20
[7]许昭永,等.岩石在破裂孕育过程中声发射变化特征的物理机制研究[J].中国地震,1994,10(3):293-302.
[8]张兴民,于克君,席京德,等.微震技术在煤矿两带监测领域的研究与应用[J].煤炭学报,2000,25(6):566-570.
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