本文選題：深井 + 高應力　； 參考：《中國礦業(yè)大學》2015年碩士論文

【摘要】：隨著開采深度的增加,深井高應力軟巖巷道的支護與維護問題已經(jīng)成為國內(nèi)外地下工程支護的難題之一,單一的主動支護、被動支護的形式已無法有效控制巷道劇烈變形和持續(xù)蠕變。傳統(tǒng)錨桿支護技術在高應力軟巖巷道中難以形成穩(wěn)定、有效的承載結構;而被動支護形式,雖然能夠通過其護表作用顯著提高淺部圍巖穩(wěn)定性,但無法適應圍巖的強烈變形,同時難以發(fā)揮深部穩(wěn)定巖體的承載能力,高應力環(huán)境下出現(xiàn)大變形屈服破壞現(xiàn)象。因此,本文根據(jù)國內(nèi)外深井高應力軟巖巷道的研究現(xiàn)狀和金寶屯煤礦N201工作面地質條件,綜合采用理論分析、工程類比、數(shù)值模擬和現(xiàn)場工業(yè)性試驗等方法,研究了深井高應力軟巖巷道的支護技術,確定了被動支護與主動支護相結合的錨網(wǎng)噴架棚聯(lián)合支護技術方案及參數(shù),并將研究成果成功應用到工程實踐。主要研究內(nèi)容為:(1)現(xiàn)場調查相鄰工作面--N203工作面皮帶巷與回風巷地質采礦條件及其變形破壞特征,指出了巷道變形破壞的主要影響因素為:煤層埋藏深,研究巷道埋深800m,原巖應力大;巷道圍巖強度低,頂?shù)装寰鶠檩^厚泥巖,高應力下變形大,底鼓現(xiàn)象突出;圍巖淺部變形大,原始被動支護方案無法控制巷道圍巖的大變形;(2)針對金寶屯煤礦N201工作面皮帶巷與運輸巷條件(其中皮帶巷相鄰上一工作面采空區(qū),回風巷為兩側實體煤的巷道)采用FLAC3D數(shù)值計算軟件對皮帶巷護巷煤柱合理留設寬度進行了分析,得到掘巷期間巷道圍巖非對稱破壞特征,基于現(xiàn)場實測和模擬分析確定皮帶巷采用沿空掘巷,煤柱寬度為8m;(3)依據(jù)巷道變形破壞特征及理論分析,提出錨桿支護+錨索+注漿加固+U型鋼支架架棚支護的錨網(wǎng)噴架棚聯(lián)合支護技術,分析了該支護技術的機理,應用FLAC3D數(shù)值計算軟件對巷道支護參數(shù)進行了數(shù)值模擬分析并確定了支護參數(shù);(4)在金寶屯N201工作面回風巷與皮帶巷進行了工程試驗,有效控制了兩條巷道的劇烈變形和持續(xù)蠕變,并且相比較原支護需要多次翻修U型鋼支架的設計方案,該支護方案簡單、易行,具有較高的推廣應用價值。
[Abstract]:With the increase of mining depth, the support and maintenance of soft rock roadway with high stress in deep well has become one of the difficult problems of underground engineering support at home and abroad. The form of passive support can not effectively control the severe deformation and continuous creep of roadway. Traditional bolting technique is difficult to form a stable and effective bearing structure in high stress soft rock roadway, while passive support can obviously improve the stability of shallow surrounding rock, but it can not adapt to the strong deformation of surrounding rock. At the same time, it is difficult to give full play to the bearing capacity of deep stable rock mass, and the phenomenon of large deformation and yield failure occurs under high stress environment. Therefore, according to the present research situation of deep and high stress soft rock roadway at home and abroad and the geological conditions of N201 face in Jinbaotun Coal Mine, the methods of theoretical analysis, engineering analogy, numerical simulation and field industrial test are adopted in this paper. In this paper, the supporting technology of soft rock roadway with high stress in deep well is studied, and the technical scheme and parameters of combination of passive support and active support are determined, and the research results are successfully applied to engineering practice. The main research contents are as follows: 1) investigation of geological mining conditions and deformation failure characteristics of belt roadway and return air roadway in adjacent face N203 working face. It is pointed out that the main influencing factors of roadway deformation and failure are: deep buried coal seam. The research roadway buried deep 800 m, the original rock stress is big, the surrounding rock strength of the roadway is low, the roof and floor plate are thick mudstone, under the high stress the deformation is big, the bottom heave phenomenon is prominent, the surrounding rock shallow deformation is big, The original passive support scheme can not control the large deformation of surrounding rock of roadway) aiming at the condition of belt roadway and transportation roadway in N201 face of Jinbaotun Coal Mine (among them, the goaf of the upper face adjacent to the belt roadway), The FLAC3D numerical calculation software is used to analyze the reasonable retaining width of coal pillar in belt roadway, and the asymmetric failure characteristics of surrounding rock of roadway during roadway excavation are obtained. Based on the field measurement and simulation analysis, it is determined that the belt roadway should be driven along the gob, the width of coal pillar is 8 m ~ (3) according to the characteristics of roadway deformation and failure and theoretical analysis, This paper puts forward the combined support technology of bolting, mesh, shotcreting and shed for bolting and bolting cable grouting to strengthen U steel support frame and shed, and analyzes the mechanism of this support technology. The numerical simulation and analysis of the supporting parameters of the roadway and the determination of the supporting parameters are carried out by using the FLAC3D software. The engineering tests are carried out in the return air roadway and belt roadway of Jinbaotun N201 face, which effectively control the violent deformation and continuous creep of the two roadways. Compared with the original support, it is necessary to renovate the design scheme of U-shaped steel support many times. This support scheme is simple, easy to implement and has high value of popularization and application.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD353

【參考文獻】

相關期刊論文 前7條

1 李化敏;付凱;;煤礦深部開采面臨的主要技術問題及對策[J];采礦與安全工程學報;2006年04期

2 周宏偉,謝和平,左建平;深部高地應力下巖石力學行為研究進展[J];力學進展;2005年01期

3 王其洲;謝文兵;荊升國;臧龍;張農(nóng);;動壓影響巷道U型鋼支架-錨索協(xié)同支護機理及其承載規(guī)律[J];煤炭學報;2015年02期

4 康紅普;煤巷錨桿支護成套技術研究與實踐[J];巖石力學與工程學報;2005年21期

5 康紅普;王金華;林健;;煤礦巷道錨桿支護應用實例分析[J];巖石力學與工程學報;2010年04期

6 王衛(wèi)軍,侯朝炯,柏建彪,張習美;綜放沿空巷道頂煤受力變形分析[J];巖土工程學報;2001年02期

7 何滿潮;煤礦軟巖工程技術現(xiàn)狀及展望[J];中國煤炭;1999年08期

，

本文編號：1917142