發(fā)布時(shí)間：2018-07-23 12:23

【摘要】：偏W型通風(fēng)系統(tǒng)可以有效解決采煤工作面上隅角瓦斯積聚和超限的難題,對(duì)于高瓦斯或瓦斯突出的工作面非常適用,在采煤區(qū)段平行布置三條回采巷道,進(jìn)而形成偏W型回采工作面,其回采巷道因?yàn)椴煌牟贾眯问胶蛧鷰r特點(diǎn)而具有不同于其他類型回采巷道的變形機(jī)理。 本文以段王礦150405工作面的回采巷道為研究對(duì)象,采用理論分析、數(shù)值模擬、現(xiàn)場(chǎng)實(shí)測(cè)等研究方法,對(duì)偏W型工作面回采巷道變形機(jī)理與控制技術(shù)研究。建立了偏W型工作面力學(xué)模型,分析了偏W型工作面軌道巷與回風(fēng)巷之間的煤柱的受力狀態(tài)以及回風(fēng)巷的底板應(yīng)力狀態(tài),揭示了回風(fēng)巷底鼓機(jī)理；利用FLAC3D數(shù)值模擬軟件模擬了回風(fēng)巷在掘進(jìn)與回采過(guò)程中的受力狀態(tài)及位移變化,回風(fēng)巷在掘進(jìn)與回采過(guò)程中有明顯底鼓,且回風(fēng)巷兩幫破壞程度不同,靠近煤柱的一幫受多重支承壓力的影響而受應(yīng)力較大,水平位移及破壞較明顯,應(yīng)該較另一幫加強(qiáng)支護(hù)。 基于偏W型工作面回采巷道變形機(jī)理,確定了巷道的最佳支護(hù)方式。根據(jù)回風(fēng)巷道兩幫不同的破壞程度對(duì)回風(fēng)巷兩幫的支護(hù)參數(shù)進(jìn)行差別化設(shè)計(jì),采用適用于高瓦斯煤層的玻璃鋼錨桿以代替金屬錨桿,運(yùn)用數(shù)值模擬和現(xiàn)場(chǎng)實(shí)測(cè)均表明優(yōu)化支護(hù)設(shè)計(jì)方案合理可靠,研究成果為偏W型工作面回采巷道的圍巖控制的方法在段王礦的應(yīng)用和推廣提供理論與實(shí)踐依據(jù)。
[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.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353

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