本文選題：主斷層　切入點(diǎn)：次生斷層　出處：《山東科技大學(xué)》2017年碩士論文

【摘要】：論文針對(duì)次生斷層影響下主斷層活化規(guī)律以及斷層煤柱留設(shè)問題進(jìn)行研究,運(yùn)用數(shù)值模擬的方法和正交實(shí)驗(yàn),由主斷層傾角、次生斷層傾角、主次斷層間距、次生斷層上端與煤層間距四種因素入手,研究了次生斷層對(duì)主斷層應(yīng)力變化、活化程度、煤柱寬度的影響規(guī)律,論文對(duì)底板突水的防治措施進(jìn)行了總結(jié),主要結(jié)論如下:1)主次斷層間距的增大,主斷層法向應(yīng)力、切向應(yīng)力峰值逐漸變小,并且逐漸向深部移動(dòng),次生斷層對(duì)主斷層應(yīng)力及活化的影響程度和影響范圍也逐漸變小,須留設(shè)的煤柱寬度先增大后減小;2)主斷層傾角的增大,次生斷層對(duì)主斷層上靠近煤層處法向應(yīng)力、切向應(yīng)力的影響程度減小,對(duì)于其他位置的影響程度相差不大,次生斷層對(duì)主斷層30-60m處活化的影響程度變化不大,整體來看,次生斷層對(duì)主斷層活化的影響程度變小,需留設(shè)的煤柱寬度均隨之減小,次生斷層對(duì)煤柱寬度的影響程度隨之減小;3)次生斷層的傾角減小,次生斷層對(duì)主斷層法向應(yīng)力、切向應(yīng)力的影響范圍變化不大,次生斷層對(duì)主斷層法向應(yīng)力、切向應(yīng)力的影響程度加大,次生斷層對(duì)主斷層活化的影響逐漸增大,隨著次生斷層傾角的增加,所需留設(shè)的煤柱寬度也隨之增加,當(dāng)次生斷層傾角大于150′時(shí),隨著次生斷層傾角的增加,須留設(shè)的煤柱寬度變化不大;4)次生斷層與煤層底板之間距離的增大,法向應(yīng)力、切向應(yīng)力峰值逐漸向深部移動(dòng),次生斷層對(duì)主斷層法向應(yīng)力、切向應(yīng)力的影響范圍逐漸向深部移動(dòng),次生斷層對(duì)主斷層法向應(yīng)力、切向應(yīng)力的影響程度也越來越小,次生斷層對(duì)主斷層的活化的影響程度呈先增大后減小的趨勢(shì),須留設(shè)的煤柱寬度先增大后減小;5)以上四種因素對(duì)煤柱寬度的影響程度排序是:次生斷層傾角主斷層傾角次生斷層上端與煤層間距主次斷層間距。研究成果對(duì)含次生斷層情況下底板斷層活化突水的防治具有一定的借鑒意義。
[Abstract]:In this paper, the activation law of main fault and the problem of coal pillar retention under the influence of secondary fault are studied. By means of numerical simulation and orthogonal experiment, the main fault dip angle, secondary fault dip angle and primary and secondary fault spacing are studied. Starting with four factors of the distance between the upper end of the secondary fault and the coal seam, the influence of secondary fault on the main fault stress change, activation degree and coal pillar width is studied, and the prevention measures of water inrush from the floor are summarized in this paper. The main conclusions are as follows: (1) with the increase of the distance between primary and secondary faults, the peak value of normal stress and tangential stress of the main fault becomes smaller, and gradually moves to the deep, and the influence of secondary fault on the stress and activation of the main fault becomes smaller, and the influence of the secondary fault on the stress and activation of the main fault becomes smaller. The width of the coal pillar needed to be set up increases first and then decreases the slope angle of the main fault. The influence of secondary fault on the normal stress and tangential stress near the coal seam on the main fault decreases, but the influence degree on other positions is not significant. The influence of secondary faults on the activation of main faults at 30-60 m has little change. On the whole, the influence of secondary faults on the activation of main faults becomes smaller, and the width of coal pillars that need to be set up decreases accordingly. The influence of secondary fault on the width of coal pillar decreases accordingly) the dip angle of secondary fault decreases, the influence range of secondary fault on normal stress and tangential stress of main fault changes little, and the secondary fault affects normal stress of main fault. The influence of the tangential stress on the activation of the main fault increases gradually, and with the increase of the dip angle of the secondary fault, the width of the coal pillar needed to be set up increases, and when the dip angle of the secondary fault is greater than 150', With the increase of dip angle of secondary fault, the width of coal pillar that needs to be set up is not changed much.) the distance between secondary fault and coal seam floor increases, the normal stress and tangential stress peak gradually move deep, and the secondary fault moves to the normal stress of main fault. The influence of tangential stress on the normal stress and tangential stress of the main fault is becoming smaller and smaller, and the influence of secondary fault on the activation of the main fault is increasing first and then decreasing. The influence degree of the above four factors on the coal pillar width is as follows: secondary fault dip angle main fault dip angle upper end of secondary fault and coal seam distance between main fault and secondary fault. The prevention and treatment of activated water inrush of floor fault under secondary fault has certain reference significance.
【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)】：TD822.3;TD163.1

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