大佛寺煤矿采动覆岩裂隙演化规律研究及应用

发布时间：2018-02-25 22:27

本文关键词： 采动裂隙椭抛带模拟实验高抽巷层位布置　出处：《西安科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：针对采动覆岩裂隙演化规律的研究对于高位瓦斯抽放巷的层位布置尤为关键，将高抽巷层位布置在瓦斯运移的裂隙通道中，有利于高抽巷更好的抽采瓦斯。本文在总结分析前人研究的基础之上，通过运用相似模拟实验、数值模拟实验及现场实测冒落带高度等方法，以大佛寺煤矿40108工作面的覆岩结构为原型，在采动覆岩裂隙演化规律研究的基础上进一步分析了高抽巷在抽放瓦斯中的合理应用。本文通过理论分析，阐述了采动裂隙椭抛带为瓦斯的储集和运移提供了空间和通道；通过实验分析，揭示随采动的影响裂隙产生发展的时空规律及随着工作面的逐步推进，，受采动影响的覆岩裂隙形成似椭抛带的动态空间。综合相似模拟实验、数值模拟实验、理论分析及现场实测的结果，获得了采场覆岩冒落带的高度。基于高抽巷抽采瓦斯机理，以大佛寺煤矿40108工作面的实际情况及高抽巷抽采数据为基础，通过分析高抽巷与煤层顶板不同距离下的抽采混合流量、抽采负压、抽采瓦斯浓度、抽采瓦斯纯量、高抽巷中CO浓度、高抽巷中CO纯量的关系，并考虑到高抽巷层位高度对采空区遗煤自燃的影响，将高抽巷的终孔层位布置在覆岩采动卸压裂隙带内，这样不仅能够提高瓦斯抽放率及瓦斯抽放浓度，获得良好的抽放效果，从而实现了该工作面瓦斯防治的安全要求。
[Abstract]:According to the layout layer of overlying strata fracture evolution law of mining in high gas drainage roadway is particularly critical, the roadway layout of fissures in Gao Chou gas migration, is conducive to better the high drainage roadway drainage gas. Based on the analysis of previous studies, through the simulation experiment, numerical simulation experiment and field measurement of the height of caving zone method in Dafosi Coal Mine 40108 working face overburden structure as the prototype, based on the law of overburden mining induced fracture on further analysis of the high drainage roadway drainage in reasonable application in gas.
This paper describes the mining fissure elliptic paraboloid provides space and channel for gas storage and transport; through the experimental analysis, reveal the effect of temporal and spatial distribution characteristics of fractures with mining development and with the working face advance gradually, by rock influences the formation of the quasi elliptic paraboloid zone dynamic space mining dynamic. A comprehensive simulation experiment, numerical simulation experiments, the results of theoretical analysis and field measurement, the overburden rock caving zone height. The roadway gas drainage mechanism based on the actual situation in Dafosi Coal Mine 40108 working face and high drainage roadway data as the foundation, through the analysis of high pumping lane with the roof of coal seam under different distances and drainage mixed flow, vacuum extraction, gas extraction concentration, gas drainage quantity of pure, high concentration of CO pumping lane, the relationship between high pumping Lane CO scalar, and considering the high drainage roadway layer height on goaf coal spontaneous The influence of combustion is to arrange the final hole level in the high pressure drainage roadway in the overburden and pressure relief fractured zone, so that not only can improve the gas drainage rate and gas drainage concentration, but also achieve good drainage effect, so as to achieve the safety requirements for gas control in the working face.

【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD325;TD712

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