Bureau of Industrial Economics, Bozhou District, Zunyi City

为探究多场耦合条件下的瓦斯抽采效果,依托COMSOL软件建立瓦斯抽采试验模型,以玉龙煤矿为例,分析了温度、瓦斯压力、渗透率随抽采时间的演化趋势,对比分析了三花眼与矩形布孔方式的瓦斯抽采效果。结果表明:温度、瓦斯压力、渗透率随抽采时间表现为下降趋势,在抽采时间为50~90d条件下的变化程度最为明显,建议90d作为玉龙煤矿瓦斯抽采的治理时限。三花眼布置方式相比于矩形布置方式的有效抽采半径更大,同比增加0.82m。

To explore the gas extraction effect under multi field coupling conditions, a gas extraction test model was established using COMSOL software. Taking Yulong Coal Mine as an example, the evolution trends of temperature, gas pressure, and permeability with extraction time were analyzed, and the gas extraction effects of three hole and rectangular hole layout methods were compared and analyzed. The results show that temperature, gas pressure, and permeability show a decreasing trend with the extraction time, and the degree of change is most significant under the condition of extraction time of 50-90 days. It is recommended that 90 days be used as the governance time limit for gas extraction in Yulong Coal Mine. The effective extraction radius of the triplet eye layout way is larger than that of the rectangular layout way, with a year-on-year increase of 0.82 m.