开采布局不合理引发冲击危险的研究  

Study on the Rock Burst Risk Caused by the Irrational Layout of the Mining Exploitation

作　　者：王毅[1] 曹安业[1] 窦林名[1] 郭晓强[1] 杜斌斌[1] 刘辉[1] 朱亮亮[1] 

机构地区：[1]中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2012年第6期827-832,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2010CB226805);中央高校基本科研业务费专项资金项目(2010QNA30);煤炭资源与安全开采国家重点实验室研究课题项目(SKLCKSM10X05);江苏省高校优势学科建设工程项目(PADD)

摘　　要：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 underground mining, the irrational layout of exploitation is often caused because of the complex geological conditions and production supersedure. Thus, it is easy to cause stress concentration around a variety of coal pillars, and may result in rock burst, which has been threat to the safety of the personnel and mining production. This paper takes the example of mining operation in Section 1, District 14, Layer 17 of the south in Level 4 of one coal mine to study. The study methods in this paper are as follows： 1） According to the timing analysis of microseismic monitoring data for nearly three months, we have summarized the relationship between the trends of time information entropy Qt ,Z and the rock burst events. 2） We carded out numerical simulation of the stress distribution in this region to identify the stress concentration pillar area around which the rock burst risk is high. 3） We analyzed the influencing factors of rock burst in the irrational layout region, including the pillar, stop line and unreasonable mining sequence in the coal seam group. In this paper, the analysis and monitoring data isactually collected, reliable and enough, and the method of the data processing and the use of the parameters Qt and Z values to characterize the burst risk are reasonable. In addition, the model which is used in the numerical simulation is well related to the actual conditions. Thus, the conclusions in the paper are credible and correct, which can be used as a reference to improve the mining layout under the similar conditions.

关 键 词：冲击矿压 开采布局 微震监测 矿震活动 

分 类 号：TD324[矿业工程—矿井建设]