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極復雜條件下煤與瓦斯突出規(guī)律及綜合治理技術(shù)

發(fā)布時間:2018-12-23 12:04
【摘要】:坦家沖、里王廟與龍家山礦地質(zhì)條件極其復雜,煤與瓦斯突出事故與瓦斯動力現(xiàn)象時有發(fā)生。論文統(tǒng)計分析歷年來煤與瓦斯突出事故,研究極復雜地質(zhì)構(gòu)造條件下影響煤與瓦斯突出事故的主要因素;分析了煤體彈性勢能與瓦斯內(nèi)能在突出過程中轉(zhuǎn)換為煤體的破碎功、碎煤拋出功的表現(xiàn)形式,得出了煤與瓦斯突出的能量條件;基于達西定律、瓦斯?jié)B流速度與瓦斯壓力梯度、圍巖應(yīng)力之間的關(guān)系,建立了煤層瓦斯壓力梯度與地應(yīng)力之間的定量關(guān)系計算模型;模擬復雜地質(zhì)條件下煤層中地應(yīng)力分布與破壞規(guī)律,分析煤層瓦斯分布狀態(tài);通過對常用的煤與瓦斯突出預測性指標測定分析,提出適用于極復雜地質(zhì)構(gòu)造條件下具有動態(tài)適應(yīng)性煤與瓦斯突出預測性指標;統(tǒng)計分析各礦歷年來所采用的各種區(qū)域防突與局部防突措施,研究分析現(xiàn)場實施效果,提出適用于極復雜地質(zhì)構(gòu)造條件下煤與瓦斯突出綜合治理技術(shù)方案。
[Abstract]:The geological conditions of Tanjiachong, Liwangmiao and Longjiashan mines are extremely complex, and accidents of coal and gas outburst and gas dynamic phenomena occur from time to time. The paper analyzes coal and gas outburst accidents over the years, and studies the main factors that affect coal and gas outburst accidents under the condition of extremely complex geological structure. The energy condition of coal and gas outburst is obtained by analyzing the transformation of elastic potential energy of coal body and internal energy of gas into the crushing work of coal body and the form of throwing work of broken coal in the process of outburst. Based on Darcy's law, the relationship between gas seepage velocity and gas pressure gradient, surrounding rock stress, the quantitative relationship between gas pressure gradient and ground stress in coal seam is established. The distribution and failure law of ground stress in coal seam under complex geological conditions are simulated, and the distribution state of coal seam gas is analyzed. Based on the determination and analysis of the commonly used predictive indexes of coal and gas outburst, the predictive index of coal and gas outburst with dynamic adaptability is put forward under the condition of extremely complex geological structure. The regional and local outburst prevention measures adopted by various mines over the years are statistically analyzed. The field implementation results are studied and analyzed, and the technical scheme for comprehensive control of coal and gas outburst under extremely complex geological structure conditions is put forward.
【學位授予單位】:中國礦業(yè)大學(北京)
【學位級別】:博士
【學位授予年份】:2013
【分類號】:TD713

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