本文選題：煤柱寬度 + 數(shù)值模擬��； 參考：《遼寧工程技術(shù)大學(xué)》2015年碩士論文

【摘要】：在我國(guó)煤炭行業(yè)普遍采用留設(shè)煤柱的方法對(duì)受采動(dòng)影響的巷道進(jìn)行護(hù)巷,它是保證煤礦安全開(kāi)采的一種比較可靠的方法,同時(shí),也是建設(shè)高產(chǎn)、高效礦井的重要技術(shù)手段之一。從目前的應(yīng)用情況來(lái)看,煤柱回采巷道對(duì)于留設(shè)寬度的確定、圍巖變形控制與安全問(wèn)題沒(méi)有得到較好的解決。因此,開(kāi)展強(qiáng)力約束小煤柱綜采巷道圍巖變形控制的研究有利于進(jìn)一步推廣煤柱護(hù)巷技術(shù)的發(fā)展,而且對(duì)于提高煤炭資源的開(kāi)采率和保證煤巷安全具有重要的科學(xué)指導(dǎo)意義。本課題選擇神華寧煤集團(tuán)白芨溝煤礦進(jìn)行研究,因?yàn)樵摰V區(qū)對(duì)于采用煤柱護(hù)巷進(jìn)行開(kāi)采的采煤方法剛剛普及,煤柱寬度都采用經(jīng)驗(yàn)進(jìn)行留設(shè),不能確保巷道安全穩(wěn)定與施工安全。因此,以白芨溝煤礦2621工作面為工程背景,對(duì)以下內(nèi)容的進(jìn)行研究：(1)現(xiàn)場(chǎng)通過(guò)勘察與收集資料,針對(duì)2621工作面的具體條件,提出煤柱寬度合理留設(shè)與巷道支護(hù)方案。(2)對(duì)于煤柱采用中空注漿錨索進(jìn)行加固,提出了“錨桿+金屬網(wǎng)+噴射混凝土+中空注漿錨索補(bǔ)強(qiáng)加固煤柱”的聯(lián)合加固支護(hù)方案。(3)采用理論計(jì)算得出煤柱的彈性區(qū)與塑性區(qū)寬度,并運(yùn)用FLAC3D軟件分別模擬不同煤柱寬度條件下,巷道圍巖的應(yīng)力分布情況和巷道圍巖位移變化規(guī)律。通過(guò)理論計(jì)算結(jié)果與模擬結(jié)果對(duì)比分析,最終確定白芨溝煤礦煤柱留設(shè)寬度為30m時(shí)較為合理。(3)通過(guò)現(xiàn)場(chǎng)監(jiān)測(cè)結(jié)果表明,支護(hù)方案增加了煤柱的強(qiáng)度,能夠保證巷道圍巖的整體穩(wěn)定性,保證生產(chǎn)安全。
[Abstract]:The method of retaining coal pillar to protect roadway affected by mining movement is widely used in the coal industry of our country. It is a more reliable method to ensure the safe mining of coal mine, and it is also one of the important technical means of constructing high yield and high efficiency mine. According to the current application situation, the problem of surrounding rock deformation control and safety has not been solved well for the determination of the retaining width of coal pillar mining roadway. Therefore, the study of surrounding rock deformation control in fully mechanized coal mining roadway with strong restraint is beneficial to the further development of roadway protection technology of coal pillar, and it has important scientific guiding significance to improve the mining rate of coal resources and ensure the safety of coal roadway. This topic chooses Shenhua Ning Coal Group Baijigou Coal Mine to carry on the research, because this mining area just popularizes the coal mining method which uses the coal pillar to protect the roadway to carry on the mining, the coal pillar width all uses the experience to carry on the design, Can not ensure the safety and stability of roadways and construction safety. Therefore, taking the 2621 face of Baijigou Coal Mine as the engineering background, this paper studies the following contents: (1) through surveying and collecting data, aiming at the concrete conditions of 2621 face, It is put forward that the coal pillar should be reasonably set up and supported by roadway. (2) the hollow grouting anchor cable is used to reinforce the coal pillar. In this paper, the combined reinforcement and support scheme of "bolting metal mesh shotcrete hollow grouting anchor cable strengthening and strengthening coal pillar" is put forward. The width of elastic and plastic zone of coal pillar is calculated by theoretical calculation. FLAC3D software is used to simulate the stress distribution of surrounding rock and the displacement of surrounding rock under different coal pillar width. Through the comparison and analysis of the theoretical calculation results and the simulation results, it is finally determined that the retaining width of coal pillar in Baijigou coal mine is more reasonable when the width of coal pillar is 30m. The field monitoring results show that the support scheme increases the strength of coal pillar. It can ensure the overall stability of roadway surrounding rock and the safety of production.
【學(xué)位授予單位】：遼寧工程技術(shù)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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