采动裂隙场瓦斯运移规律分析

Analysis of gas migration law in mining fracture field

为了研究采动裂隙场瓦斯运移规律,采用理论分析和数值模拟相结合的方法,理论分析了采动裂隙场中瓦斯涌出规律以及采动裂隙场中瓦斯运移数学模型,然后建立了“U型+走向高抽巷”通风模型,采用COMSOL软件数值模拟了“U型+走向高抽巷”通风下采空区纵向剖面、水平剖面瓦斯浓度分布以及采场瓦斯三维空间分布。研究得出,通过“U型+走向高抽巷”的布置,瓦斯抽采效果良好,为瓦斯抽采提供了借鉴。

In order to study the law of gas migration in mining fissure field,the law of gas emission in mining fissure field and the mathematical model of gas migration in mining fissure field were theoretically analyzed by the method of combining theoretical analysis with numerical simulation.Then the ventilation model of "U-shaped+heading high-pumping roadway" was established,and the "U-shaped+ heading high-pumping roadway" was numerically simulated by COMSOL software.The distribution of gas concentration in the longitudinal and horizontal sections of goaf and the three-dimensional spatial distribution of gas in stope under the ventilation of "type+strike high extraction roadway".The results showed that through the layout of "U-shaped+high-level drainage roadway",the gas extraction effect was good,which provided a reference for gas extraction.