基于FLAC^(3D)的高瓦斯矿井底抽巷布置位置优选

Optimum Analysis of Floor Gas Extraction Roadway Location in Gassy Mine Based on FLAC^(3D)

瓦斯抽采是煤矿常用的瓦斯治理方法,瓦斯抽采巷道的布置位置决定了瓦斯治理效果的好坏。以贵州地区米箩煤矿上煤组开采为工程背景,结合煤矿相关资料,从理论上提出了适合该煤矿的两种瓦斯抽采巷道布置方案。采用FLAC3D数值模拟软件,从围岩垂直应力和塑性破坏区两个方面对两种方案进行优选分析,得出米箩煤矿在10号煤层底板10m靠近回风巷侧20m处布置瓦斯抽采巷道最为合适。该优选方案用于米箩煤矿工程实践,经检验该方案瓦斯治理效果较好。

Gas extraction is a gas control method commonly used in gassy coal mines, the layout of gas extraction roadway will determine whether the gas control effect is good or bad. In this paper, by taking the mining of the upper group of coal seams in Miluo Mine in Guizhou Province as an engineering background and combining with relevant information of the mine, two schemes of gas extraction roadway layout suitable for this mine were theoretically proposed. Preferred analysis was made on the two schemes through two aspects of vertical rock stress and plastic damage zone by using numerical simulation software FLAC3D . Finally, it concluded that the best scheme was to arrange the gas extraction roadway in the position 10 m in the floor of No. 10 Seam and 20 m near the side of the air-return gate. This preferred scheme was used to the engineering practice in Miluo Mine and good gas control effect was obtained.