摘要
根据赵固二矿二1煤层的物理力学参数,利用FLAC3D数值模拟软件模拟巷道开挖后所受到的力学状态,根据钻屑量和钻屑瓦斯解吸量现场实测的数据,确定出巷道的卸压带、应力集中带和原始应力带。通过不同封孔深度的抽采效果验证,得出瓦斯抽采钻孔封孔深度必须超过应力集中带,最后确定合理封孔深度为13m。
According to physical and mechanical parameters of No. 2 1 coal seam of Zhaogu No. 2 Mine,the numerical simulation software FLAC3D was used to simulate the mechanical state of roadway after driving. Using measured data of drilling cuttings and gas desorption amout of drilling cuttings,the pressure release zone,stress concentration zone and original stress zone were determined. The gas drainage results for different borehole sealing depths showed that the depth must be deeper than stress concentration zone, and the rational borehole sealing depth is 1 3 m.
出处
《中国煤炭》
北大核心
2014年第2期101-104,共4页
China Coal
关键词
瓦斯抽采
合理封孔深度
数值模拟
钻屑量
钻屑瓦斯解吸量
gas drainage
rational borehole sealing depth
numerical simulation
drilling cuttings weight
gas desorption amount of drilling cuttings
