圣华煤业复采工作面微震监测研究

发布时间：2018-03-31 18:39

本文选题：二次回采　切入点：1301复采工作面　出处：《太原理工大学》2017年硕士论文

【摘要】：圣华煤业1301复采工作面属于二次回采,经过初步物探,与井下实际观察,发现井下存在许多空巷、空区、冒落区,这些情况的存在对煤矿的正常回采有很大的影响。由于矿山煤岩体爆裂灾害具有复杂性与不确定性,目前对灾害的诱发机理及孕育过程还不清晰,因此,利用ESG微震监测技术对煤岩体的失稳运动监测具有重要意义,从而实现圣华煤业复采工作面顺利高效回采。通过本文的研究,得出以下结论:圣华煤业1301复采工作面回采过程中遇到的矿山压力现象与实体煤回采有很大的区别,通过对圣华煤业井下实际地资料的收集,研究了微震的发震机制,结合微震监测定位理论及实际应用情况,确定了井下微震传感器的布置,经过实测得出ESG微震监测系统符合实际要求。通过在井下布置矿压观测设备,监测工作面来压时,支架的受力情况,得出初次来压步距为28.6m,周期来压步距为11.7m,与理论计算基本相同,符合监测要求。将ESG微震监测系统应用在圣华煤业,同时通过微震监测系统监测工作推进方向的微震活动的能量和频次。通过总结得出1301复采工作面回采时周期来压前1~2天,微震事件的能量和频次增加明显,能量是平时的3倍,频次是平时的2倍左右,说明微震监测效果良好。对复采区不同时间的微震事件进行了分析,得出微震事件分别处于平稳期、续发期和间歇期,不同的时期对应不同的矿山压力现象。从而制定残煤复采过程中的矿山动力灾害工程控制措施,着重介绍了主动控制和被动控制。通过对微震监测预警研究,说明了微震在残煤复采中的应用具有很好的实践意义,可以提前对复采工作面推进方向的空巷、空区与冒落区起到预防作用,从而对提前支护起到指导作用,有效避免矿山压力灾害的发生,避免材料、人力的浪费,对二次回采起到一定优化作用。
[Abstract]:The 1301 compound mining face of Shenghua Coal Industry belongs to secondary mining. After preliminary geophysical exploration and actual observation, it is found that there are many empty roadways, empty areas and caving areas in the underground. The existence of these conditions has a great influence on the normal mining of coal mine. Because of the complexity and uncertainty of the burst disaster of coal and rock mass in the mine, the induced mechanism and inoculation process of the disaster are not clear at present. It is of great significance to use ESG microseismic monitoring technology to monitor the instability movement of coal and rock mass, so as to realize the smooth and efficient mining of the compound mining face of San Hua coal industry. The conclusions are as follows: the phenomenon of mine pressure encountered in the mining process of 1301 remining face of San Hua coal industry is quite different from that of solid coal mining. Through collecting the actual ground data of San Hua coal mining industry, the mechanism of occurrence of microearthquakes is studied. Combined with the theory and practical application of microseismic monitoring and positioning, the arrangement of downhole microseismic sensors is determined. The ESG microseismic monitoring system is found to meet the practical requirements through the installation of mine pressure observation equipment in the downhole to monitor the pressure coming from the working face. The stress condition of the support shows that the initial pressure step distance is 28.6 m, and the periodic pressure step distance is 11.7 m, which is basically the same as the theoretical calculation and accords with the monitoring requirements. The ESG microseismic monitoring system is applied to the Shenghua coal industry. At the same time, the energy and frequency of microseismic activity in the direction of microseismic monitoring are monitored through the microseismic monitoring system. By summing up the energy and frequency of microseismic events, the energy and frequency of microseismic events are increased obviously, and the energy is three times that of normal times. The frequency of microseismic monitoring is about 2 times that of normal time, which indicates that the microseismic monitoring effect is good. The microseismic events at different times in the remining area are analyzed, and the results show that the microseismic events are in the stationary period, the continuation period and the interval period, respectively. Different periods correspond to different mine pressure phenomena. Thus, the engineering control measures of mine dynamic disaster in the process of remining residual coal are formulated, and the active control and passive control are emphatically introduced. It shows that the application of microseismic in residual coal mining has good practical significance, which can prevent the gob, goaf and caving area in advance of the driving direction of remining face, thus playing a guiding role in supporting ahead of time. Effectively avoid the occurrence of mine pressure disaster, avoid the waste of materials and manpower, and play a certain role in optimization of secondary mining.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD326

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