本文選題：舊采殘煤　切入點：圍巖控制　出處：《太原理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：本文以山西晉煤集團澤州天安圣華煤業(yè)有限公司的3號煤層舊采殘煤為背景，研究分析舊采區(qū)二次掘進巷道圍巖控制技術。根據(jù)現(xiàn)場鉆孔頂板取樣并進行巖性力學分析以及現(xiàn)場實地勘察分析，得出了舊采區(qū)巷道的現(xiàn)狀，和舊采區(qū)二次掘進巷道尺寸等相關參數(shù)，以及二次掘進時的巷道穿越情況。依據(jù)工程類比法，及工程經(jīng)驗，，選定錨桿支護方案。通過RFPA軟件數(shù)值模擬二次掘進巷道通過空巷、空區(qū)、冒落區(qū)時，頂板在不同的錨桿支護方案下的支護效果，得出以下結(jié)論： （1）實體煤中掘進巷道與舊采區(qū)二次巷道掘進穿越空巷對比，實體煤中掘進時，巷道破壞程度小于舊采區(qū)二次巷道掘進穿越空巷。舊采區(qū)二次掘進無支護巷道穿越空巷、空區(qū)、冒落區(qū)時，頂板局部破壞嚴重，存在冒頂?shù)碾[患，都需要進行支護。 （2）舊采區(qū)二次掘進巷道穿越空巷時，影響頂板支護效果的因素由大到小依次是錨桿強度、錨桿間距、錨桿長度。支護方案選用錨桿強度600MPa，錨桿長度2.0m，錨桿間距600mm的支護方案組合最為合理，對頂板控制效果較好。 （3）舊采區(qū)二次掘進巷道穿越空區(qū)時，影響頂板支護效果的因素由大到小依次是錨桿強度、錨桿長度、錨桿間距。舊采區(qū)二次掘進巷道穿越空區(qū)時，支護方案選用錨桿強度500MPa，錨桿長度2.0m，錨桿間距800mm的支護方案組合最為合理，對頂板控制效果較好。 （4）舊采區(qū)二次掘進巷道穿越冒落區(qū)時，影響頂板支護效果的因素由大到小依次是錨桿強度、錨桿長度、錨桿間距，但錨桿長度和錨桿間距對支護效果的影響幾乎相同。舊采區(qū)二次掘進巷道穿越冒落區(qū)時，支護方案選用錨桿強度500MPa，錨桿長度2.0m，錨桿間距800mm的支護方案組合最為合理，對頂板控制效果較好。
[Abstract]:The background of this paper is the old mining residual coal in No. 3 coal seam of Shanxi Jin Coal Group, Zezhou Tianan Shenghua Coal Industry Co., Ltd. This paper studies and analyzes the control technology of surrounding rock in the roadway of secondary excavation in the old mining area. According to the sampling of the roof of the borehole on the spot and the analysis of rock mechanics and field investigation, the present situation of the roadway in the old mining area is obtained. According to the engineering analogy method and engineering experience, the bolting support scheme is selected, and the numerical simulation of the secondary tunneling roadway through the empty roadway is carried out by RFPA software, and the relevant parameters such as the size of the roadway in the old mining area, and the tunnel traversing during the secondary excavation, are selected according to the engineering analogy method and the engineering experience. The effect of roof support under different bolting schemes is obtained when there is a caving area. The following conclusions are obtained:. Compared with the second tunneling in the old mining area, the damage degree of the roadway in the solid coal is less than that in the old coal mining area, which is less than that in the old mining area, and the second excavation in the old mining area passes through the empty roadway without support. In the caving area, the local damage of roof is serious, and the hidden danger of roof fall needs to be supported. 2) when the roadway passes through the empty roadway in the old mining area, the factors influencing the roof support effect are the strength of the anchor rod, the spacing of the bolt, the order of the factors that affect the effect of roof support. The combination of bolting strength 600MPa, bolt length 2.0m, bolt spacing 600mm is the most reasonable, and the effect of roof control is better. 3) when the roadway passes through the goaf in the old mining area, the factors influencing the roof support effect are the strength of the bolt, the length of the bolt, the spacing of the bolt, and when the roadway of the old mining area passes through the goaf, the factors influencing the effect of roof support are as follows:. The combination of bolting strength 500MPa, bolt length 2.0m, bolt spacing 800mm is the most reasonable, and the effect of roof control is better. 4) when the roadway passing through the caving area in the old mining area, the factors influencing the roof support effect are the strength of the bolt, the length of the bolt, the spacing of the bolt, the order of the factors affecting the effect of roof support. However, the influence of bolt length and bolt spacing on the support effect is almost the same. When the roadway passes through the caving area in the old mining area, the support scheme is composed of bolting strength 500 MPA, bolt length 2.0 m, bolt spacing 800 mm, and so on. The control effect on roof is better.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD353

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