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在井工开采中,常由于地质条件复杂及生产接替需要造成开采布局不合理,以致各种煤柱中应力集中而发生冲击矿压,威胁到人员及生产安全。为此,应研究其原因及预兆和防治方法,故本课题立项是正确的。文章以某矿区四水平南17层14区1段为工程实例进行研究,研究方法是:1)根据该区近3个月微震监测系统测定数据的时序分析,总结其时间信息熵Qt值以及Z值趋势图与冲击事件的关系;2)对此区域的应力分布情况进行数值模拟,找出具有冲击危险的煤柱应力升高区域;3)对冲击矿压的影响因素,包括煤柱、停采线及煤层群的开拓开采顺序不合理处进行分析。本文的分析监测数据是实际采集的,是可靠的,足够的;数据整理方法及以参数Qt,Z值来表征冲击危险是合理的;在数值模拟中采用的模型是符合实际的,为类似条件下改进开采合理布局提供了参考。
In the well drilling and mining, often due to the complex geological conditions and production take over the need to cause the layout of the mining unreasonable, resulting in a variety of coal pillars in the stress concentration and the occurrence of rock burst, threatening the safety of personnel and production. To this end, we should study the causes and warnings and prevention methods, so this project is correct. Based on the analysis of the time series of microseismic monitoring data in the past three months in this area, the Qt value of time entropy and Z Value trend and impact events; 2) numerical simulation of stress distribution in this area to find out the area of stress increase of coal pillar with impact risk; 3) impact factors of impact pressure, including coal pillar, stop Mining line and coal seam group exploration and exploitation of unreasonable at the order of analysis. In this paper, the analysis of monitoring data is actually collected, and it is reliable and sufficient. It is reasonable that the method of data sorting and characterization of the percussive risk by parameters of Qt, Z value. The model used in numerical simulation is in line with the actual conditions for similar conditions It provides a reference for improving the rational layout of mining.