【摘要】：含陷落柱煤層開采時(shí)，由于水的溶蝕、沖蝕和磨蝕作用，陷落柱的孔隙度和滲透性參量隨時(shí)間變化，，常常發(fā)生水流形態(tài)的轉(zhuǎn)變，引發(fā)突水災(zāi)害。變質(zhì)量破碎巖體滲流研究成為陷落柱突水災(zāi)害防治的基礎(chǔ)課題。陷落柱突水前，經(jīng)歷了長時(shí)間的質(zhì)量流失，加速滲透試驗(yàn)是模擬陷落柱質(zhì)量遷移和流失的有效手段。本文對(duì)質(zhì)量流失過程中破碎巖體的滲透性進(jìn)行加速試驗(yàn)研究，取得如下研究成果： （1）研制了能夠體現(xiàn)溶蝕、沖蝕和磨蝕效應(yīng)的變質(zhì)量破碎巖石滲透試驗(yàn)系統(tǒng)，本系統(tǒng)由軸向加載及位移控制子系統(tǒng)、滲透子系統(tǒng)、數(shù)據(jù)采集與分析子系統(tǒng)和細(xì)小顆�；厥兆酉到y(tǒng)構(gòu)成，可滿足泵站式和注射器式兩種方式滲透試驗(yàn)的要求，兩種滲透方式切換自如。 （2）分析了溶蝕、沖蝕、磨蝕作用下破碎巖石的質(zhì)量變化過程，建立了質(zhì)量流失率和表觀毛密度變化率的表達(dá)式，解釋了破碎巖石質(zhì)量遷移和流失的機(jī)理。 （3）通過變質(zhì)量破碎泥巖滲透加速試驗(yàn)，建立了質(zhì)量流失率與孔隙度、時(shí)間的函數(shù)關(guān)系，并構(gòu)造了函數(shù)形狀參數(shù)的遺傳算法；得到了Talbol冪指數(shù)和初始孔隙度對(duì)質(zhì)量流失率的影響規(guī)律。 （4）通過變質(zhì)量破碎泥巖滲透加速試驗(yàn)，構(gòu)建了變質(zhì)量破碎泥巖滲透性參量的遺傳算法，得到不同Talbol冪指數(shù)和初始孔隙度下滲透率、非Darcy流β因子和加速度系數(shù)的變化規(guī)律。 （5）通過變質(zhì)量破碎泥巖水流形態(tài)轉(zhuǎn)變?cè)囼?yàn)，得到了水流形態(tài)轉(zhuǎn)變前質(zhì)量流失時(shí)間、流失總質(zhì)量與Talbol冪指數(shù)、初始孔隙度、壓力梯度的關(guān)系，建立了水流形態(tài)轉(zhuǎn)變條件，運(yùn)用質(zhì)量流失的觀點(diǎn)解釋了破碎泥巖滲流失穩(wěn)機(jī)理。 （6）考慮了加速因子對(duì)質(zhì)量流失率的影響，構(gòu)建了變質(zhì)量破碎巖體滲流系統(tǒng)動(dòng)力學(xué)模型，設(shè)計(jì)了系統(tǒng)響應(yīng)計(jì)算方法，模擬了任意Talbol冪指數(shù)、任意初始孔隙度和任意壓力梯度下破碎巖石質(zhì)量流失率、孔隙度、滲透率、非Darcy流β因子、加速度系數(shù)、壓力和滲流速度的時(shí)變過程。
[Abstract]:In coal seam mining with subsided columns, the porosity and permeability parameters of collapse columns vary with time due to the erosion, erosion and erosion of water, which often result in the change of water flow form and cause water inrush disaster. Seepage analysis of broken rock mass with variable mass has become the basic subject of water inrush disaster prevention of collapse column. Before the collapse column inrush water, it has experienced a long time of mass loss, and accelerated permeation test is an effective means to simulate the mass migration and loss of the collapse column. In this paper, the permeability of broken rock mass in the process of mass loss is studied by accelerated test, and the following research results are obtained: (1) A permeability test system for fractured rock with variable mass, which can reflect the effects of dissolution, erosion and erosion, is developed. The system consists of axial loading and displacement control subsystem, penetration subsystem, data acquisition and analysis subsystem and fine particle recovery subsystem. (2) the mass change process of broken rock under the action of dissolution, erosion and abrasion is analyzed, and the expressions of mass loss rate and apparent wool density change rate are established. The mechanism of mass migration and loss of broken rock is explained. (3) through accelerated permeability test of broken mudstone with variable mass, the function relationship between mass loss rate and porosity and time is established, and the genetic algorithm of function shape parameter is constructed. The influence of Talbol power exponent and initial porosity on mass loss rate is obtained. (4) genetic algorithm for permeability parameters of variable mass broken mudstone is constructed by accelerated permeability test of fractured mudstone with variable mass. The variations of permeability, non-Darcy flow 尾 factor and acceleration coefficient under different Talbol exponents and initial porosity are obtained. (5) the mass loss time before the change of flow pattern is obtained through the flow pattern transformation test of broken mudstone with variable mass. The relationship between total mass loss and Talbol power exponent, initial porosity, pressure gradient, and the condition of flow pattern transformation are established. In this paper, the mechanism of seepage instability of broken mudstone is explained from the viewpoint of mass loss. (6) considering the influence of acceleration factor on mass loss rate, the dynamic model of seepage system of fractured rock mass with variable mass is constructed, and the calculation method of system response is designed. The time-varying processes of mass loss rate, porosity, permeability, non-Darcy flow 尾 factor, acceleration coefficient, pressure and seepage velocity of broken rock under arbitrary Talbol exponent, arbitrary initial porosity and arbitrary pressure gradient are simulated.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TD745

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐曉松;鄧楚鍵;鄭穎人;吳相超;;三峽庫區(qū)碎石土地基浸水試驗(yàn)研究[J];地下空間與工程學(xué)報(bào);2008年02期

2 朱萬成;魏晨慧;張福壯;楊天鴻;;流固耦合模型用于陷落柱突水的數(shù)值模擬研究[J];地下空間與工程學(xué)報(bào);2009年05期

3 李道娟;許江;楊紅偉;李樹春;;循環(huán)孔隙水壓力作用下砂巖變形特性實(shí)驗(yàn)研究[J];地下空間與工程學(xué)報(bào);2010年02期

4 尹尚先;武強(qiáng);;陷落柱概化模式及突水力學(xué)判據(jù)[J];北京科技大學(xué)學(xué)報(bào);2006年09期

5 王家臣;李見波;;預(yù)測陷落柱突水災(zāi)害的物理模型及理論判據(jù)[J];北京科技大學(xué)學(xué)報(bào);2010年10期

6 В.И.Кузъкин;趙惠珍;;負(fù)載狀態(tài)下溶解作用對(duì)不同成因巖石強(qiáng)度的影響[J];地質(zhì)科學(xué)譯叢;1997年02期

7 曾康一,門福錄;關(guān)于多孔介質(zhì)中滲流的基本規(guī)律[J];地震工程與工程振動(dòng);1990年03期

8 陳鋼林,周仁德;水對(duì)受力巖石變形破壞宏觀力學(xué)效應(yīng)的實(shí)驗(yàn)研究[J];地球物理學(xué)報(bào);1991年03期

9 湯連生,王思敬;水—巖化學(xué)作用對(duì)巖體變形破壞力學(xué)效應(yīng)研究進(jìn)展[J];地球科學(xué)進(jìn)展;1999年05期

10 張信貴,吳恒,方崇,易念平;水土化學(xué)體系中鈣鎂對(duì)土體結(jié)構(gòu)強(qiáng)度貢獻(xiàn)的試驗(yàn)研究[J];地球與環(huán)境;2005年04期

相關(guān)博士學(xué)位論文 前3條

1 黃偉;基于流固耦合動(dòng)力學(xué)的礦壓顯現(xiàn)與瓦斯涌出相關(guān)性分析[D];中國礦業(yè)大學(xué);2011年

2 姚邦華;破碎巖體變質(zhì)量流固耦合動(dòng)力學(xué)理論及應(yīng)用研究[D];中國礦業(yè)大學(xué);2012年

3 杜鋒;破碎巖體水沙兩相滲透特性試驗(yàn)研究[D];中國礦業(yè)大學(xué);2013年

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