本文選題：深部軟巖 + 復(fù)合頂板�。� 參考：《中國礦業(yè)大學(xué)》2015年碩士論文

【摘要】：城郊礦二水平開采目前已進入全面展開的階段,開采深度增大,導(dǎo)致地壓也隨之增大,地質(zhì)條件惡化,以往淺部的支護形式已無法滿足礦井深部圍巖的支護要求。特別是對于深部高應(yīng)力軟巖復(fù)合頂板煤巷,支護效果差、維護極為困難等問題日益暴露,已嚴(yán)重地影響礦井正常生產(chǎn)。因此,急需對城郊礦二水平深部高應(yīng)力軟巖復(fù)合頂板煤巷的破壞機理和支護方式進行研究,保證礦井安全高效生產(chǎn)。本研究結(jié)合目前國內(nèi)外現(xiàn)有的巷道支護理論和技術(shù),采用力學(xué)分析、數(shù)值模擬、實驗室?guī)r石強度測試和現(xiàn)場工業(yè)性試驗等研究方法,深入分析了城郊煤礦二水平深部軟巖復(fù)合頂板煤巷的破壞特征和變形機理。提出了城郊礦深部軟巖復(fù)合頂板煤巷“幫頂同治”支護原理和與之相對應(yīng)的城郊礦二水平煤巷支護技術(shù),并在城郊煤礦21304區(qū)段運輸平巷試驗應(yīng)用成功,有效控制了巷道圍巖變形,實現(xiàn)了“幫頂同治”。研究內(nèi)容和結(jié)論如下:1)分析了城郊礦二水平煤巷圍巖賦存特征,計算了城郊礦二水平地應(yīng)力,城郊礦二水平的垂直應(yīng)力v?=16.755~20.915 MPa,最大水平應(yīng)力=24.308~29.068H?MPa,并對二水平典型煤巷圍巖強度進行了實驗室測試,由此確定城郊礦二水平煤巷頂板為典型的深部軟巖復(fù)合頂板。2)總結(jié)了城郊礦二水平煤巷變形破壞特征,建立了復(fù)合頂板煤巷破壞力學(xué)模型,通過力學(xué)分析,得到了復(fù)合頂板巷道破壞的力學(xué)機理;采用力學(xué)推導(dǎo)、數(shù)值模擬計算對比分析不同支護結(jié)構(gòu),認(rèn)為“巷道幫、頂整體支護”結(jié)構(gòu)為最優(yōu)支護結(jié)構(gòu),并基于此提出了針對城郊煤礦深部軟巖復(fù)合頂板煤巷的“幫頂同治”支護原理。3)針對城郊礦二水平煤巷兩幫煤體強度極低的賦存特點,研究了松軟煤體中錨桿支護失效的機理,提出了適合城郊礦二水平煤巷的幫部加固技術(shù)和包括對拉錨索在內(nèi)的松軟煤層加固對策。4)根據(jù)復(fù)合頂板“幫頂同治”支護原理,從頂板錨固體加固、支護附件和頂板錨索三個方面,對城郊礦現(xiàn)有的頂板加固技術(shù)進行優(yōu)化,滿足了城郊礦二水平煤巷支護的技術(shù)要求,并以此提出了城郊礦深部“幫頂同治”支護技術(shù)。5)研究結(jié)論及成果成功應(yīng)用于城郊礦21304區(qū)段運輸平巷,有效控制了巷道變形,實現(xiàn)了“幫頂同治”的支護效果。
[Abstract]:At present, the second-level mining in suburban coal mine has entered the stage of full development, and the depth of mining increases, which leads to the increase of ground pressure and the deterioration of geological conditions. In the past, the shallow support form can no longer meet the requirements of support for the deep surrounding rock of the mine. Especially for deep high stress soft rock composite roof coal roadway, the problems of poor support effect and extremely difficult maintenance have been exposed day by day, which has seriously affected the normal production of mine. Therefore, it is urgent to study the failure mechanism and supporting mode of the coal roadway with high stress and soft rock in the second level of the suburb mine, so as to ensure the safe and efficient production of the mine. Combined with the existing theories and techniques of roadway support at home and abroad, the research methods such as mechanical analysis, numerical simulation, laboratory rock strength test and field industrial test are adopted in this study. The failure characteristics and deformation mechanism of the coal roadway with soft rock composite roof at the second level in the suburb coal mine are analyzed. This paper puts forward the support principle of the deep soft rock composite roof coal roadway and the corresponding supporting technology of the second horizontal coal roadway in the suburb coal mine, and it is successfully applied in the 21304 section of the suburb coal mine. The deformation of surrounding rock of roadway is effectively controlled, and the same roof treatment is realized. The contents and conclusions of the study are as follows: (1) the characteristics of surrounding rock in the second-level coal roadway in suburban coal mine are analyzed, and the in-situ stress of the second-level coal roadway in suburban coal mine is calculated. The vertical stress of the second level in the suburb mine is 16.755 ~ 20.915 MPA, and the maximum horizontal stress is 24.30880 ~ 29.068 Hm ~ (a). The surrounding rock strength of the typical coal roadway at the second level has been tested in the laboratory. From this, it is determined that the roof of the second level coal roadway in the suburb mine is a typical deep soft rock composite roof. 2) the deformation and failure characteristics of the second level coal roadway in the suburb mine are summarized, and the failure model of the compound roof coal roadway is established, and the failure force model of the compound roof coal roadway is established through mechanical analysis. The mechanical mechanism of composite roof roadway failure is obtained, and different supporting structures are compared and analyzed by mechanical derivation and numerical simulation, and it is considered that "roadway side, roof integral support" structure is the optimal supporting structure. Based on this, the mechanism of bolting failure in soft rock composite roof coal roadway in suburb coal mine is studied according to the supporting principle of "side roof treatment" for coal roadway of deep soft rock in suburb coal mine. 3) aiming at the occurrence characteristics of extremely low strength of two side coal bodies in the second horizontal coal roadway in suburb coal mine, the failure mechanism of bolting support in soft coal body is studied. This paper puts forward the reinforcement technology of the side part suitable for the second horizontal coal roadway in the suburb coal mine and the reinforcement countermeasure of soft coal seam including pulling anchor cable. 4) according to the support principle of the composite roof "the roof is under the same treatment", the reinforcement of the roof anchoring body is carried out from the roof anchoring body. In three aspects of supporting accessory and roof anchor cable, the existing roof reinforcement technology in suburban coal mine is optimized to meet the technical requirements of second-level coal roadway support in suburban coal mine. Based on this, the paper puts forward the research conclusions and results of the deep support technology. 5) successfully applied to the 21304 section transportation roadway of the suburb mine, effectively controlling the deformation of the roadway, and realizing the support effect of "the same roof treatment".
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD353

【參考文獻】

相關(guān)期刊論文 前10條

1 高明仕;閆高峰;楊青松;孟憲義;張明華;;深度破壞軟巖巷道修復(fù)的錨架組合承載殼原理及實踐[J];采礦與安全工程學(xué)報;2011年03期

2 康紅普;王金華;林健;;高預(yù)應(yīng)力強力支護系統(tǒng)及其在深部巷道中的應(yīng)用[J];煤炭學(xué)報;2007年12期

3 李學(xué)哲;黃成玉;;基于工業(yè)以太網(wǎng)的頂板離層檢測傳感器設(shè)計[J];工礦自動化;2012年11期

4 肖同強;支光輝;張治高;;深部構(gòu)造區(qū)域地應(yīng)力分布與巷道穩(wěn)定關(guān)系研究[J];采礦與安全工程學(xué)報;2013年05期

5 胡躍敏;劉國生;辛亞軍;勾攀峰;;松軟煤體中錨桿支護錨固體形成機理分析[J];河南理工大學(xué)學(xué)報(自然科學(xué)版);2014年05期

6 張超;;錨固長度對松軟特厚煤層巷道支護穩(wěn)定性影響研究[J];煤炭技術(shù);2014年09期

7 鄒永德;歐陽建江;張衛(wèi)東;;深部大傾角煤巷幫部加強支護技術(shù)的實踐[J];煤炭科技;2014年01期

8 沈榮喜;劉長武;吳秀儀;;錨網(wǎng)煤巷頂板離層臨界值的計算和分析[J];四川大學(xué)學(xué)報(工程科學(xué)版);2007年03期

9 何滿潮,蘇永華,孫曉明,徐能雄;錨桿支護煤巷穩(wěn)定性可靠度分析[J];巖石力學(xué)與工程學(xué)報;2002年12期

10 曹國金,姜弘道,熊紅梅;一種確定拉力型錨桿支護長度的方法[J];巖石力學(xué)與工程學(xué)報;2003年07期

，

本文編號：1908313