龙煤南山矿冲击地压的预警研究

发布时间：2018-06-23 04:44

本文选题：冲击地压 + 微震　；参考：《内蒙古科技大学》2015年硕士论文

【摘要】：随着矿井开采深度的增大，冲击地压已经成为严重制约矿井安全生产的主要原因，在一定程度上对矿工的生命安全，对矿井的安全高效生产已经形成了严重的威胁，本文主要针对龙煤南山矿的22采区冲击地压的预警进行研究，先通过学习总结国内研究冲击地压的先进理论如强度理论刚度理论等，学习冲击地压发生的内在原因，然后再去研究外部因素对冲击地压的影响的作用，综合研究分析各种影响冲击地压发生的原因，通过理论研究实验验证，再运用冲击地压预警研究的相关技术方法相结合，对龙煤南山矿22采区的22135工作面进行冲击危险区域预警。本文通过理论分析与现场试验相结合，多角度考虑影响因素，通过运用多种先进的预测方法对南山矿进行研究的，先运用综合指数法针对全矿井的地质进行研究分析发现，全矿井大部分区域都具有中等或强冲击的危险，并将危险区域绘出，而深度开采的22采区是具有强冲击危险的区域，然后分析开采技术条件对冲击地压的影响，发现三个冲击危险工作面如22135等工作面，然后对22135工作面在回采过程中进行数值模拟研究分析，得出具有较高的原岩应力区域及在工作面回采过程中应力重新分布规律，并划分出回采过程中的5个应力集中区，，然后运用微震监测数据进行研究发现，上述危险区域的微震能量普遍超标，并通过对以往冲击事件发生时能量都在105J左右，因此以105J为一个临近值，然后通过电磁辐射方法对危险区域进行进一步的研究，研就发现对22135上巷下帮20-120m，下巷上帮20-500m的监测范围各10个班的电磁辐射强度监测数据进行统计，电磁辐射强度平均值上巷24.8mv，下巷25.6mv，临界值为24.8×1.5=38mv，22135下巷中部区域电磁辐射强度值一直处于比较大的状态，22135工作面回采期间可以参考此临界值，然后运用钻削的方法对冲击危险区域进行研究，其数据表明大部分区域平均钻屑量和最大钻屑量均超过临界值，说明下巷的应力很大，确定了冲击危险源，并采取卸压措施。
[Abstract]:With the increase of mine mining depth, impact ground pressure has become the main reason of restricting mine safety production seriously. To a certain extent, it has posed a serious threat to the safety of miners and the safety and efficiency of mine production. This paper mainly studies the early warning of rock burst in No. 22 mining area of Longmei Nanshan Mine. Firstly, by studying and summarizing the advanced theories of shock ground pressure in China, such as strength theory and stiffness theory, we study the internal causes of impact ground pressure. Then we study the effect of external factors on the impact of shock ground pressure, comprehensively study and analyze the causes of the impact of impact ground pressure, through theoretical research and experimental verification, and then use the relevant technical methods of early warning research of shock ground pressure to combine. The 22135 face in No. 22 mining area of Longmei Nanshan Coal Mine was forewarned of impact hazard area. In this paper, through the combination of theoretical analysis and field test, the influence factors are considered from many angles, and through the use of various advanced forecasting methods to study Nanshan Mine, the comprehensive index method is first used to study and analyze the geology of the whole mine. Most areas of the whole mine have the risk of moderate or strong impact, and the dangerous area is mapped out, while the 22 mining area of deep mining is the area with strong impact risk, and then analyzes the impact of mining technical conditions on the impact of ground pressure. Three percussive working faces, such as 22135 and so on, are found out, and then the numerical simulation analysis of 22135 face is carried out in the process of mining, and the law of stress redistribution in the mining process is obtained, which has higher original rock stress area. Five stress concentration areas in the process of mining are divided, and the microseismic monitoring data are used to study the results. It is found that the microseismic energy of the above dangerous areas is generally over the standard, and the energy of the previous impact events is about 105J. Therefore, taking 105J as an adjacent value, and then making further study on the dangerous area by electromagnetic radiation method, it is found that the monitoring data of electromagnetic radiation intensity of 10 classes in the monitoring range of 22135 upper roadway and 20 to 500m are statistically analyzed. The average electromagnetic radiation intensity is 24.8 MV in the upper roadway and 25.6 MV in the lower roadway. The critical value is 24.8 脳 1.538 MV / 22135. The electromagnetic radiation intensity in the middle area of the roadway is always in a relatively large state. Then the method of drilling is used to study the perilous area of impact. The data show that the average amount of cuttings and the maximum amount of drilling chips in most areas exceed the critical value, which shows that the stress in the lower roadway is very large, and the impact hazard source is determined and the pressure relief measures are taken.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD324

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