Tests show that coal with larger porosity, lower strength and higher velocity of gas desorption is more dangerous in hazard of outburst.
试验表明突出危险煤较非危险煤孔隙率大，强度小，且具有更大的瓦斯解吸速度。
Therefore, coalbed methane adsorption has close relationships with coal molecular structure, crystal structure and porosity.
可见煤层甲烷的吸附与煤的分子结构、晶体结构和孔隙度密切相关。
Coal reservoir is a dual porous rock composed of matrix porosity and fracture with its unique cleat system.
煤储层是一种双重孔隙介质，其孔隙由基质孔隙和裂隙组成，并具有自身独特的割理系统。
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