本文選題：煤與瓦斯突出 + 深部開采��； 參考：《遼寧工程技術(shù)大學(xué)》2013年碩士論文

【摘要】：煤與瓦斯突出是指在壓力作用下，破碎的煤與瓦斯由煤體內(nèi)突然向采掘空間大量噴出，是一種具有極其復(fù)雜動(dòng)力現(xiàn)象的工程地質(zhì)災(zāi)害。隨著井下煤層開采深度的逐漸增加，深部采場(chǎng)地應(yīng)力、瓦斯壓力、溫度逐漸升高，煤體力學(xué)特性與淺部也將存在較大差異。因此，深入開展煤與瓦斯突出模擬實(shí)驗(yàn)及數(shù)值計(jì)算的研究，對(duì)防治深部開采煤與瓦斯突出災(zāi)害，保證煤礦安全生產(chǎn)具有重要的理論與實(shí)踐意義。 本文采用以試驗(yàn)研究為主，數(shù)值模擬和理論分析為輔的研究方法。首先以典型高瓦斯礦井遼寧阜新孫家灣煤礦太上層為研究對(duì)象，利用自主研發(fā)的煤與瓦斯突出模擬實(shí)驗(yàn)裝置，首次進(jìn)行了主動(dòng)突出模擬實(shí)驗(yàn)研究。模擬了煤層開采深度分別為900m、1100m、1300m時(shí)發(fā)生煤與瓦斯突出全過(guò)程。利用軸壓、圍壓模擬地應(yīng)力作用，孔隙壓模擬瓦斯壓力作用。經(jīng)相似理論計(jì)算預(yù)設(shè)了三種開采深度下軸壓和圍壓值，孔隙壓逐級(jí)增加得到了突出臨界瓦斯壓力、突出強(qiáng)度、突出距離等突出參數(shù)。試驗(yàn)再現(xiàn)了煤與瓦斯突出孔洞口小腔大、突出煤粉分布具有分選性等突出特征現(xiàn)象，驗(yàn)證了煤與瓦斯突出模擬儀的可靠性。基于試驗(yàn)結(jié)果，，重點(diǎn)分析了突出后各區(qū)域煤粒徑分布、質(zhì)量分布、分選性等規(guī)律，與前人結(jié)果吻合性較好。繼而利用實(shí)驗(yàn)結(jié)果反演現(xiàn)場(chǎng)突出有效應(yīng)力值，理論推導(dǎo)得到煤與瓦斯突出能量，與現(xiàn)場(chǎng)實(shí)測(cè)值基本相符。最后，建立了THM耦合數(shù)值模型，模擬得到了深部采場(chǎng)不同煤層深度、溫度條件下的煤層瓦斯壓力、瓦斯?jié)B流速度、有效應(yīng)力、體積應(yīng)變、孔隙率和滲透率的變化規(guī)律。研究結(jié)論可為該礦煤與瓦斯突出的防治提供參考。
[Abstract]:Coal and gas outburst is a kind of engineering geological disaster with extremely complex dynamic phenomena, which means that the broken coal and gas are ejected suddenly from the coal body into the excavating space under the action of pressure. With the increase of mining depth in underground coal seam, the stress, gas pressure and temperature of deep coal mining site will gradually increase, and the mechanical characteristics of coal body will also be different from that of shallow coal seam. Therefore, it is of great theoretical and practical significance to carry out the simulation experiment and numerical calculation of coal and gas outburst to prevent and control coal and gas outburst disasters in deep mining and to ensure the safety of coal mine production. In this paper, the experimental research method is adopted, which is supplemented by numerical simulation and theoretical analysis. Firstly, taking the upper layer of Sunjiawan Coal Mine in Fuxin, Liaoning Province, as the research object, the active outburst simulation experiment was carried out for the first time by using the self-developed simulation experimental device of coal and gas outburst. The whole process of coal and gas outburst is simulated when the mining depth of coal seam is 900m ~ 1100m ~ 1300m respectively. Axial pressure, confining pressure and pore pressure are used to simulate ground stress and gas pressure respectively. The axial pressure and confining pressure under three mining depths are calculated by similarity theory, and the outburst critical gas pressure, outburst strength, outburst distance and other outburst parameters are obtained by increasing pore pressure step by step. The experimental results show that the coal and gas outburst with small cavity is large and the coal powder distribution has the characteristics of separation. The reliability of the coal and gas outburst simulator is verified. Based on the experimental results, the distribution of coal particle size, mass distribution and separation of coal in different regions after outburst are analyzed, and the results are in good agreement with the previous results. Then the effective stress value of field outburst is retrieved from the experimental results, and the energy of coal and gas outburst is derived theoretically, which is basically consistent with the field measured value. Finally, a THM coupled numerical model is established to simulate the variation of coal seam gas pressure, gas seepage velocity, effective stress, volume strain, porosity and permeability under different coal seam depths and temperatures in deep stope. The results can provide reference for the prevention and treatment of coal and gas outburst in this mine.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TD713

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張建國(guó),魏風(fēng)清;含瓦斯煤的突出模擬試驗(yàn)[J];礦業(yè)安全與環(huán)保;2002年01期

2 潘一山,楊小彬,王學(xué)濱;多孔介質(zhì)局部化與煤和瓦斯突出射流理論[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年04期

3 ;國(guó)外煤和瓦斯突出機(jī)理綜述[J];礦業(yè)安全與環(huán)保;1976年03期

4 張九零,張?jiān)迄i;利用“球殼失穩(wěn)”理論確定煤與瓦斯突出瓦斯壓力臨界值[J];河北理工學(xué)院學(xué)報(bào);2005年02期

5 李連崇;唐春安;楊天鴻;王大國(guó);;巖石破裂過(guò)程THMD耦合數(shù)值模型研究[J];計(jì)算力學(xué)學(xué)報(bào);2008年06期

6 俞善炳;恒穩(wěn)推進(jìn)的煤與瓦斯突出[J];力學(xué)學(xué)報(bào);1988年02期

7 丁曉良,丁雁生,俞善炳;煤在瓦斯一維滲流作用下的初次破壞[J];力學(xué)學(xué)報(bào);1990年02期

8 鄧全封,欒永祥,王佑安;煤與瓦斯突出模擬試驗(yàn)[J];煤礦安全;1989年11期

9 李萍豐;淺談煤與瓦斯突出機(jī)理的假說(shuō)——二相流體假說(shuō)[J];煤礦安全;1989年11期

10 蔣承林,俞啟香;煤與瓦斯突出機(jī)理的球殼失穩(wěn)假說(shuō)[J];煤礦安全;1995年02期

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