远程卸压瓦斯抽放数值模拟

Numerical modeling of gas extraction by relief pressure from a long-distance

利用新近开发的含瓦斯煤岩破裂过程固气耦合作用的F -RFPA2D数值模拟工具 ,模拟了潘一矿在下煤层开采过程中上覆岩层的移动、垮落的全过程 ,以及由于下煤层开采所诱发的上煤层 (主采煤层 )透气性演化过程 ,并对采动影响下煤层瓦斯抽放时瓦斯的流动运移规律进行了初步的数值模拟研究。模拟结果同现场工程实际比较吻合 ,表明利用F -RFPA来研究煤矿开采所诱发的煤层透气性演化和瓦斯运移等工程实际问题是可行的。

The coal seam movement of Panyi coal mine, as well as its collapse process, gas permeability evolution induced by excavation of the underplayed coal seam are simulated, using newly developed F-RFPA2D code, which can simulate the strata fracturing, caving process, and gas permeability evolution induced by excavation of the underplayed coal seam. This research reveals the movement regular of the gas drainage. The results are well tallied with the field data, being practical and reliable to analyze the engineering problems such as gas permeability evolution and gas delivery induced by mining.