高瓦斯综放面走向高抽巷布置与抽采技术研究

发布时间：2018-03-11 19:35

本文选题：高抽巷　切入点：裂隙发育　出处：《中国矿业大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着矿井开采向深部延伸，瓦斯含量和瓦斯压力越来越大，瓦斯制约生产的“瓶颈”问题也越来越突出，放顶煤的高强度开采使得工作面上隅角及回风巷内瓦斯屡屡超限，严重影响正常生产并对人员和设备安全造成巨大威胁。因此，从设计源头上解决瓦斯制约生产的问题是实现综放开采安全高效生产的关键。潞安矿区应用高抽巷较少，在目前通风抽采方式不能够解决瓦斯超限的情况下，，对高瓦斯综放面走向高抽巷布置及抽采技术进行系统研究十分必要，可为潞安矿区的深部高瓦斯煤层安全高效开采提供一条新的思路。本文首先对五阳煤矿7605综放面瓦斯涌出特征、来源与构成和采空区瓦斯运移规律进行分析，发现在使用回风巷钻场钻孔抽采技术的基础上，采空区瓦斯涌出仍然是工作面瓦斯涌出的主要原因，故提出更加稳定的走向高抽巷抽采技术来治理相邻7603综放面采空区瓦斯涌出。结合五阳煤矿3#煤层上覆岩层的岩性特征，通过理论计算及数值模拟分析得到综放面冒落带和裂隙带高度，以及横三带的相关参数。建立采空区几何模型，通过FLUENT数值模拟研究了高抽巷在不同平距和垂距参数条件下的抽采效果，得出最优的高抽巷空间布置位置。对高抽巷受采动影响的破坏规律进行理论及数值模拟分析，得出高抽巷的主要变形破坏特征为底臌，为了保证高抽巷的正常使用，采取打底板锚杆对底板进行加固。通过理论及数值模拟分析，确定高抽巷长度、断面、抽采负压、抽采管路、抽采设备、密封措施等高效抽采系统参数。在五阳煤矿7603综放面应用走向高抽巷，从现场监测结果可以发现，合理布置的高抽巷可以抽采邻近层及围岩涌入采空区的大量瓦斯，使综放面实现安全开采。
[Abstract]:As the mining extends to the deep, the gas content and the gas pressure are more and more big, the "bottleneck" problem of the gas restriction production is more and more prominent, the high intensity mining of top coal caving makes the gas in the upper corner of the face and in the return air roadway often exceed the limit. It seriously affects the normal production and poses a great threat to the safety of personnel and equipment. Therefore, it is the key to realize the safe and efficient production of fully mechanized caving mining to solve the problem of restricting the production of gas from the design source, and the application of high drainage roadway is less in Lu'an mining area. Under the condition that the ventilation and mining method can not solve the problem of gas exceeding limit, it is necessary to study systematically the layout of high drainage roadway and the drainage technology of high gas fully mechanized caving face. It can provide a new idea for safe and efficient mining of deep high gas coal seam in Lu'an mining area. In this paper, the characteristics of gas emission from 7605 fully mechanized caving face in Wuyang Coal Mine, the origin and composition of gas emission, and the law of gas migration in goaf are analyzed. Gas emission from goaf is still the main reason of gas emission in coal face, so a more stable technology of high drainage roadway is put forward to control gas emission in goaf of adjacent 7603 fully mechanized caving face. Combined with lithologic characteristics of overlying strata on coal seam of Wuyang coal mine, Through theoretical calculation and numerical simulation analysis, the height of caving zone and fracture zone of fully mechanized caving face and the relative parameters of transverse third zone are obtained. The geometric model of goaf is established. Through FLUENT numerical simulation, the extraction effect of high extraction roadway under different horizontal distance and vertical distance parameters is studied, and the optimal spatial location of high extraction roadway is obtained. The theory and numerical simulation analysis are carried out on the failure law of high extraction roadway affected by mining movement. It is concluded that the main deformation and failure characteristics of high drawing roadway are floor heave. In order to ensure the normal use of high pumping roadway, the bottom slab anchor rod is adopted to reinforce the bottom slab. Through theoretical and numerical simulation analysis, the length, section and negative pressure of high drawing roadway are determined. High efficiency extraction system parameters, such as extraction pipeline, extraction equipment, sealing measures, etc., are used in 7603 fully mechanized caving face of Wuyang Coal Mine towards high pumping roadway. It can be found from the monitoring results on the spot, The reasonably arranged high drainage roadway can extract a large amount of gas from adjacent strata and surrounding rock to the goaf, so that the fully mechanized caving face can be safely mined.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD712.6

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