極復雜條件下煤與瓦斯突出規(guī)律及綜合治理技術(shù)
[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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