综放面覆岩移动与裂隙带瓦斯运移规律及瓦斯抽采工程实践

An applied research on overlying strata movement and gas migration regularity and extraction/mining technologies for use in top-coal caving longwall faces

基于芦岭煤矿的地质条件,通过建立综放工作面开采的岩层力学模型,运用RFPA、UDEC计算软件,对上覆岩层移动规律进行数值模拟计算;结合岩层移动特征,研究了综放工作面覆岩高位裂隙瓦斯运移规律和机理,由此确定出瓦斯运移的关键层位,找出适合煤与瓦斯共采的基本条件。

Based on the geological conditions of Luling coal mine,through the establishment of rock mechanics model of top coal caving longwall faces,overlying strata movement regularity of top coal caving longwall face is numerically simulated by using RFPA and UDEC calculation software.Combining the strata movement characteristics of overlying rock,gas migration rule in high cranny above full-mechanized caving mining face is comprehensively studied.Gas migration mechanism in high fissures is analyzed.Thus,key strata of gas migration are identified and the basic conditions to suit simultaneous mining/extraction of coal and gas are found out.