本文選題：直墻半圓拱形巷道 + 巷道變形破壞因素　； 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：直墻半圓拱形巷道是目前煤礦中應(yīng)用最多的巷道之一,對(duì)直墻半圓拱形巷道變形破壞的機(jī)理、影響巷道變形破壞的因素、巷道的支護(hù)技術(shù)等方面的研究具有重要的理論意義和實(shí)用價(jià)值。本文以直墻半圓拱形巷道為研究對(duì)象,首先采用理論分析方法,對(duì)直墻半圓拱形巷道的變形破壞機(jī)理進(jìn)行分析,得出影響巷道變形破壞的5個(gè)主控因素:側(cè)壓系數(shù)λ、圍巖垂直壓力p巖體的黏聚力C、巖體的內(nèi)摩擦角φ、巖體的抗拉強(qiáng)度σt;然后通過(guò)FLAC3D數(shù)值模擬分析不同影響因素對(duì)直墻半圓拱形巷道變形破壞的影響規(guī)律,又通過(guò)數(shù)值模擬和正交試驗(yàn)法對(duì)5個(gè)主控因素進(jìn)行分析,得出它們對(duì)直墻半圓拱形巷道變形破壞的顯著性次序,影響巷道塑性區(qū)體積的顯著性次序?yàn)?內(nèi)摩擦角側(cè)壓系數(shù)垂直應(yīng)力內(nèi)聚力抗拉強(qiáng)度;5個(gè)主控因素對(duì)巷道綜合變形量的影響顯著性次序?yàn)?內(nèi)摩擦角 側(cè)壓系數(shù) 黏聚力 抗拉強(qiáng)度垂直應(yīng)力,其中內(nèi)摩擦角是影響巷道變形破壞的最主要因素。以霄云煤礦東翼膠帶大巷為工程背景,對(duì)巷道全斷面破壞段提出新的巷道修復(fù)方案,以理論和數(shù)值模擬結(jié)論為指導(dǎo),對(duì)巷道支護(hù)參數(shù)和注漿范圍進(jìn)行優(yōu)化,最終提出采用高強(qiáng)錨桿、錨索+粗鋼筋網(wǎng)+注漿+噴混凝土+底角錨桿+槽鋼梁形成反底拱的聯(lián)合加固方式。而后對(duì)修復(fù)方案進(jìn)行現(xiàn)場(chǎng)監(jiān)測(cè),通過(guò)監(jiān)測(cè)數(shù)據(jù)和現(xiàn)場(chǎng)變形情況可知,新的巷道修復(fù)方案可以有效地控制巷道圍巖的變形,滿足礦井的正常生產(chǎn)需求。
[Abstract]:The vertical wall semi-circular arch roadway is one of the most widely used roadways in coal mines at present. The mechanism of deformation and failure of the vertical wall semi-circular arch roadway and the factors influencing the roadway deformation and failure are discussed. The research of roadway supporting technology has important theoretical significance and practical value. In this paper, the vertical wall semi-circular arch roadway is taken as the research object. Firstly, the deformation and failure mechanism of the vertical wall semi-circular arch roadway is analyzed by using the theoretical analysis method. Five main controlling factors affecting roadway deformation and failure are obtained: lateral pressure coefficient 位, cohesive force C of rock mass under vertical pressure of surrounding rock, internal friction angle 蠁 of rock mass, tensile strength 蟽 _ t of rock mass, and then different influencing factors are analyzed by FLAC3D numerical simulation. The law of influence on deformation and failure of semi-circular arch roadway with straight wall, By means of numerical simulation and orthogonal test, five main control factors are analyzed, and the significant order of their deformation and failure to the vertical wall semi-circular arch roadway is obtained. The significant order of influence on the volume of the plastic zone of roadway is as follows: lateral pressure coefficient of internal friction angle vertical stress cohesion tensile strength and the significant order of influence of five main control factors on the comprehensive deformation of roadway is as follows: lateral pressure coefficient of internal friction angle Cohesion tensile strength vertical stress, The angle of internal friction is the most important factor affecting the deformation and failure of roadway. Taking the belt roadway in the east wing of Xiaoyun coal mine as the engineering background, a new roadway restoration scheme is proposed for the whole section failure section of the roadway. Under the guidance of the theoretical and numerical simulation conclusions, the supporting parameters and grouting range of the roadway are optimized. Finally, the combined reinforcement method of high strength anchor rod and thick wire mesh grouting concrete bottom angle channel steel beam to form reverse bottom arch is put forward. Through monitoring data and field deformation, the new roadway restoration scheme can effectively control the surrounding rock deformation of roadway and meet the normal production needs of the mine.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD353

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