【摘要】：本文結(jié)合鄂爾多斯色連二礦某工作面運(yùn)輸順槽巷道工程地質(zhì)條件,針對(duì)弱黏結(jié)薄層復(fù)合頂板巷道支護(hù)中發(fā)生的各種問題,采取理論與現(xiàn)場(chǎng)相結(jié)合,并使用數(shù)值模擬計(jì)算分析,對(duì)弱黏結(jié)薄層復(fù)合頂板巷道圍巖破壞狀況、變形破壞機(jī)理及支護(hù)控制技術(shù)進(jìn)行了研究。 通過工程地質(zhì)研究,分析了運(yùn)輸順槽弱黏結(jié)軟巖巷道工程條件,對(duì)薄層復(fù)合頂板統(tǒng)計(jì)了在原支護(hù)形式下的巷道變形破壞規(guī)律。通過對(duì)巷道進(jìn)行現(xiàn)場(chǎng)觀測(cè),對(duì)巷道圍巖的變形特征進(jìn)行了總結(jié)分析。 采用FLAC3D數(shù)值模擬軟件,建立工程計(jì)算力學(xué)模型,模擬了運(yùn)輸順槽中巷道圍巖損壞形變情況,分析了巷道圍巖失穩(wěn)情況,同時(shí)運(yùn)用軟巖工程力學(xué)等理論對(duì)巷道支護(hù)荷載進(jìn)行計(jì)算,并確定了影響巷道穩(wěn)定性的主要因素。 通過對(duì)運(yùn)輸順槽破壞機(jī)理研究分析,結(jié)合巷道控制原則,運(yùn)用FLAC3D軟件模擬比較了巷道矩形、拱形和圓角平頂矩形三個(gè)斷面,確定了巷道斷面形狀,提出了以錨桿加固中部與錨索深部承載結(jié)構(gòu)相結(jié)合為核心的弱黏結(jié)薄層復(fù)合頂板巷道穩(wěn)定性控制新技術(shù),闡述了新技術(shù)中各加固拱作用機(jī)理,并通過數(shù)值模擬證實(shí)了煤巷控制技術(shù)的合理性和可靠性。 通過現(xiàn)場(chǎng)工程實(shí)踐,表明聯(lián)合加固結(jié)構(gòu)支護(hù)技術(shù)有效地控制了運(yùn)輸順槽巷道圍巖變形破壞,維護(hù)和保持了巷道的穩(wěn)定。
[Abstract]:According to the engineering geological conditions of transportation roadway in a working face of Ordos Selian No.2 Mine, aiming at the various problems occurred in the support of weakly bonded thin layer composite roof roadway, this paper combines the theory with the field, and uses numerical simulation to calculate and analyze. The failure state of surrounding rock, deformation failure mechanism and support control technology of weakly bonded thin-layer composite roof roadway are studied. Through engineering geology research, the engineering conditions of weakly bonded soft rock roadway in transport channel are analyzed, and the deformation and failure law of roadway under the original supporting form is analyzed for thin layer composite roof. The deformation characteristics of surrounding rock of roadway are summarized and analyzed by field observation of roadway. In this paper, the numerical simulation software FLAC3D is used to establish the engineering computational mechanics model, to simulate the damage and deformation of the surrounding rock in the roadway along the channel, to analyze the instability of the surrounding rock of the roadway, and to calculate the supporting load of the roadway by using the theory of engineering mechanics of soft rock. The main factors influencing the stability of roadway are determined. Through the study and analysis of the failure mechanism of transportation along the channel, combined with the principle of roadway control, using FLAC3D software to simulate and compare three sections of roadway rectangular, arch and rounded flat-top rectangle, the section shape of roadway is determined. In this paper, a new technique for stability control of weakly bonded thin-layer composite roof roadway is put forward, which is based on the combination of the central part of anchor reinforcement and the deep bearing structure of anchor cable, and the action mechanism of each reinforced arch in the new technology is expounded. The rationality and reliability of coal roadway control technology are verified by numerical simulation. Through the field engineering practice, it is shown that the combined reinforcement structure support technology can effectively control the surrounding rock deformation and damage of the roadway along the channel and maintain the stability of the roadway.
【學(xué)位授予單位】：安徽理工大學(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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本文編號(hào)：2318167