立体抽采下采场瓦斯流动规律及模拟

Numerical Simulation of Gas Flow Law in Stope Under Stereo Gas Drainage

为了更好的研究瓦斯立体抽采条件下的采空区的瓦斯流动和涌出规律,根据"砌体梁"的顶板下沉移动曲线和导气裂隙带的"O"型圈理论,研究煤矿井下采空区破碎煤岩的渗流特性,对垮落带破碎煤岩的渗透率进行量化研究,推导出正常回采期间采空区垮落带的渗透率半理论化的表达式,并将其应用于阳泉三矿K8206综采工作面的U+I型+高抽巷的瓦斯立体抽采系统中,根据现场情况建立对应的CFD模型,得出瓦斯立体抽采条件下采空区瓦斯流动及分布规律,数值模拟结果和现场大量观测数据高度吻合,为瓦斯抽采系统的设计和优化提供理论依据.

In order to well master the gas flow law and gas emission under goaf,here we present that the goaf fractured coal-rock is in a non-saturation and the reason was also analyzed.The goaf fractured coal-rock seepage was investigated based on the displacement curve of voussior beam theory and "O" type circle theory in maths methods.The distribution of falling zone seepage is described as a "dustpan" type and a semitheoretical equation is proposed.The model and equation were put into the CFD simulation software a...