偏W型工作面回采巷道变形机理与控制技术研究
发布时间：2018-07-23 12:23
【摘要】：偏W型通风系统可以有效解决采煤工作面上隅角瓦斯积聚和超限的难题,对于高瓦斯或瓦斯突出的工作面非常适用,在采煤区段平行布置三条回采巷道,进而形成偏W型回采工作面,其回采巷道因为不同的布置形式和围岩特点而具有不同于其他类型回采巷道的变形机理。 本文以段王矿150405工作面的回采巷道为研究对象,采用理论分析、数值模拟、现场实测等研究方法,对偏W型工作面回采巷道变形机理与控制技术研究。建立了偏W型工作面力学模型,分析了偏W型工作面轨道巷与回风巷之间的煤柱的受力状态以及回风巷的底板应力状态,揭示了回风巷底鼓机理；利用FLAC3D数值模拟软件模拟了回风巷在掘进与回采过程中的受力状态及位移变化,回风巷在掘进与回采过程中有明显底鼓,且回风巷两帮破坏程度不同,靠近煤柱的一帮受多重支承压力的影响而受应力较大,水平位移及破坏较明显,应该较另一帮加强支护。 基于偏W型工作面回采巷道变形机理,确定了巷道的最佳支护方式。根据回风巷道两帮不同的破坏程度对回风巷两帮的支护参数进行差别化设计,采用适用于高瓦斯煤层的玻璃钢锚杆以代替金属锚杆,运用数值模拟和现场实测均表明优化支护设计方案合理可靠,研究成果为偏W型工作面回采巷道的围岩控制的方法在段王矿的应用和推广提供理论与实践依据。
[Abstract]:The partial W-type ventilation system can effectively solve the problem of gas accumulation and over-limit in the upper corner of the coal mining face, which is very suitable for the working face with high gas or gas outburst. Three mining roadways are arranged parallel to each other in the coal mining section. Then a partial W type mining face is formed, and its roadway has different deformation mechanism from other types of roadway because of its different layout forms and surrounding rock characteristics. Taking the mining roadway of 150405 working face of Duan Wang Mine as the research object, this paper studies the deformation mechanism and control technology of the roadway of partial W type working face by the methods of theoretical analysis, numerical simulation and field measurement. The mechanical model of inclined W type face is established, the stress state of coal pillar between track roadway and return air roadway and the stress state of bottom plate of return air roadway are analyzed, and the mechanism of bottom bulging in return air roadway is revealed. Using FLAC3D numerical simulation software, the stress state and displacement change of backwind roadway in the process of driving and mining are simulated. The backwind roadway has obvious bottom bulge in the process of tunneling and mining, and the damage degree of the two sides of return wind roadway is different. The side near the coal pillar is affected by the pressure of multiple supports, and the horizontal displacement and damage are obvious, so the support should be strengthened. Based on the deformation mechanism of mining roadway in partial W type working face, the best supporting mode of roadway is determined. According to the different failure degree of the two sides of the return air roadway, the supporting parameters of the two sides of the return air roadway are designed differently, and the glass fiber reinforced plastic bolt, which is suitable for high gas coal seam, is adopted to replace the metal anchor rod. Numerical simulation and field measurement show that the optimized support design scheme is reasonable and reliable. The research results provide the theoretical and practical basis for the application and popularization of the surrounding rock control method of mining roadway in partial W type face in Duan Wang Mine.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
本文编号：2139408
[Abstract]:The partial W-type ventilation system can effectively solve the problem of gas accumulation and over-limit in the upper corner of the coal mining face, which is very suitable for the working face with high gas or gas outburst. Three mining roadways are arranged parallel to each other in the coal mining section. Then a partial W type mining face is formed, and its roadway has different deformation mechanism from other types of roadway because of its different layout forms and surrounding rock characteristics. Taking the mining roadway of 150405 working face of Duan Wang Mine as the research object, this paper studies the deformation mechanism and control technology of the roadway of partial W type working face by the methods of theoretical analysis, numerical simulation and field measurement. The mechanical model of inclined W type face is established, the stress state of coal pillar between track roadway and return air roadway and the stress state of bottom plate of return air roadway are analyzed, and the mechanism of bottom bulging in return air roadway is revealed. Using FLAC3D numerical simulation software, the stress state and displacement change of backwind roadway in the process of driving and mining are simulated. The backwind roadway has obvious bottom bulge in the process of tunneling and mining, and the damage degree of the two sides of return wind roadway is different. The side near the coal pillar is affected by the pressure of multiple supports, and the horizontal displacement and damage are obvious, so the support should be strengthened. Based on the deformation mechanism of mining roadway in partial W type working face, the best supporting mode of roadway is determined. According to the different failure degree of the two sides of the return air roadway, the supporting parameters of the two sides of the return air roadway are designed differently, and the glass fiber reinforced plastic bolt, which is suitable for high gas coal seam, is adopted to replace the metal anchor rod. Numerical simulation and field measurement show that the optimized support design scheme is reasonable and reliable. The research results provide the theoretical and practical basis for the application and popularization of the surrounding rock control method of mining roadway in partial W type face in Duan Wang Mine.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
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