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《Journl of China Coal Society》 1991-03
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THEORY OF COAL PORES AND ITS APPLICATION IN EVALUATION OF GAS OUTBURST PRONENESS AND GAS DRAINAGE

Wu Jun (Institute of Geology,Academia Sinica) Jin Kuili (Beijing Graduate School,China University of Mining and Technology) Tong Youde (Technical Consulting Committee of Coal Industry) Qian Rongde (Physical and Chemical Research Institute,Nanjing Oil Refinery)  
The authors used Carlo-Erba 2000 Mercury Pressure Porosimeter to study mi-cropore volume,distribution of pore passage,pore structure and pore outburstingpressure,migration of coal-bed gas and gas drainage of coal seams with and with-out proneness of outburst.The micro-pores,with a radius of 37.5~75000(?)were divided into 3 classes and 9 sub-classes according to distribution of porepassage.The concept and classification of“gas pocket”was introduced.Views thatcoal prone to outburst has the tendency of multiple outbursts,and that factors af-feeting migration of gas are micropore,micro-fissure and effect of gas diffusionare expressed.
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