【摘要】：近幾年來，隨著我國經(jīng)濟(jì)建設(shè)的高速發(fā)展，作為煤炭生產(chǎn)和消耗大國，煤炭資源越來越少，面臨枯竭的趨勢(shì),這就要求我們?cè)诿禾块_采期間必須竭盡全力地做到避免煤炭資源不必要的浪費(fèi)。針對(duì)這種情況，國內(nèi)外許多研究學(xué)者就沿空巷道留煤柱護(hù)巷技術(shù)展開了大量的研究，并取得了重要的成果。通過研究發(fā)現(xiàn)合理的煤柱尺寸不僅能夠節(jié)約煤炭資源，而且還對(duì)回采巷道圍巖控制及采場(chǎng)安全回采起到積極作用和效果。特別是對(duì)高瓦斯礦井而言，合理的護(hù)巷煤柱尺寸不僅要減小煤柱尺寸避免資源的浪費(fèi)，同時(shí)還要防止采空區(qū)一側(cè)的有害氣體通過煤柱的裂縫進(jìn)入回采空間對(duì)工作面安全開采帶來威脅。所以針對(duì)高瓦斯礦井沿空巷道護(hù)巷煤柱留設(shè)是否合理的問題也是現(xiàn)下還需進(jìn)一步研究解決的問題之一。 通過對(duì)先前眾多學(xué)者研究成果的學(xué)習(xí)和借鑒，本文以陽煤集團(tuán)五礦高瓦斯礦井8407工作面沿空巷道護(hù)巷煤柱適應(yīng)性進(jìn)行研究。首先是運(yùn)用理論研究分析8407工作面回風(fēng)巷道護(hù)巷煤柱上覆巖層運(yùn)動(dòng)破壞的特征及其對(duì)煤柱產(chǎn)生的影響，并對(duì)沿空護(hù)巷煤柱內(nèi)部應(yīng)力分布以及變形破壞機(jī)理進(jìn)行分析，，建立了沿空巷道護(hù)巷煤柱力學(xué)計(jì)算模型，推導(dǎo)出煤柱的合理留設(shè)寬度的計(jì)算公式來驗(yàn)證8407工作面沿空護(hù)巷煤柱是否達(dá)到回采要求，并根據(jù)注漿加固后的煤柱強(qiáng)度重新計(jì)算優(yōu)化煤柱的合理寬度。接著輔以相似材料模擬實(shí)驗(yàn)來還原采場(chǎng)實(shí)際情況，根據(jù)觀察采場(chǎng)開挖過程中煤柱及巷道礦壓顯現(xiàn)特征來初步預(yù)測(cè)煤柱及巷道圍巖變形規(guī)律。然后運(yùn)用數(shù)值模擬對(duì)煤柱注漿加固前后的應(yīng)力、位移大小和狀態(tài)進(jìn)行分析，并對(duì)煤柱在注漿加固后能否繼續(xù)優(yōu)化尺寸進(jìn)行初步的探討。最后根據(jù)現(xiàn)場(chǎng)工業(yè)性試驗(yàn)來監(jiān)測(cè)實(shí)際工作面支承壓力分布、巷道及煤柱應(yīng)力和位移等礦壓規(guī)律及顯現(xiàn)特征對(duì)比煤柱注漿加固前后的效果，并以此來論證先前運(yùn)用各種方法手段的正確性。本文所研究的成果為今后陽煤礦區(qū)煤柱的支護(hù)及尺寸優(yōu)化提供一些有價(jià)值的參考和實(shí)踐經(jīng)驗(yàn)。
[Abstract]:In recent years, with the rapid development of China's economic construction, as a large country of coal production and consumption, coal resources are becoming less and less, facing the trend of depletion. This requires that we must do our utmost to avoid unnecessary waste of coal resources during coal mining. In view of this situation, many scholars at home and abroad have carried out a great deal of research on the technology of retaining coal pillar to protect roadway along the goaf, and obtained important results. It is found that reasonable coal pillar size can not only save coal resources, but also play a positive role and effect on the control of surrounding rock of mining roadway and safe mining of stope. Especially for high gas mine, reasonable coal pillar size should not only reduce the coal pillar size to avoid the waste of resources, At the same time, it is necessary to prevent harmful gas from the side of goaf from entering the mining space through the crack of coal pillar. Therefore, it is one of the problems that need to be solved further in order to solve the problem of whether it is reasonable to keep coal pillar in roadway along goaf in high gas mine. Through the study and reference of many previous scholars' research results, this paper studies the adaptability of coal pillar protection along goaf roadway in 8407 face of high gas mine in No. 5 Coal Mine of Yangmei Coal Group. Firstly, the characteristics of movement failure of overburden strata on coal pillar in 8407 face return air roadway and its influence on coal pillar are analyzed, and the stress distribution and deformation failure mechanism of coal pillar along goaf roadway are analyzed. The mechanical calculation model of coal pillar in goaf roadway is established, and the formula of reasonable retaining width of coal pillar is deduced to verify whether the pillar along goaf roadway of 8407 face meets the requirement of mining. The reasonable width of coal pillar is optimized according to the strength of coal pillar strengthened by grouting. Then the simulation experiment of similar materials is used to reduce the actual situation of stope and the deformation law of coal pillar and surrounding rock of roadway is preliminarily predicted according to observing the characteristics of coal pillar and rock pressure in roadway during the excavation of stope. Then the stress, displacement and state of coal pillar before and after grouting reinforcement are analyzed by numerical simulation, and whether the coal pillar can continue to optimize the size after grouting reinforcement is discussed preliminarily. Finally, according to the field industrial test to monitor the actual working face bearing pressure distribution, roadway and pillar stress and displacement and other characteristics of rock pressure, compared with the effect of coal pillar grouting before and after reinforcement. And in order to demonstrate the correctness of the previous use of various methods and means. The results of this paper provide some valuable reference and practical experience for the support and size optimization of coal pillar in Yang-coal mine area in the future.
【學(xué)位授予單位】：太原理工大學(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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