CAJ | 학술논문

为找到一种能够准确测定低渗松软煤层有效抽采半径的方法，及确定合理的抽采钻孔参数，以煤介质的双重孔隙结构特征以及瓦斯流动理论为基础，根据质量守恒定律、Fick定律以及Darcy定律，建立了考虑扩散-渗流作用的瓦斯流动模型。并以余吾煤业低渗松软的3＃煤层为例，将建立的瓦斯流动模型植入到COMSOL中开展计算，得到了抽采钻孔周围瓦斯流动规律及不同抽采时间的有效抽采半径，计算数据与现场测试结果的吻合证实了所建立的瓦斯流动模型的有效性，形成了一种确定低渗松软煤层抽采钻孔附近的瓦斯流动规律及抽采半径的方法。
위조도일충능구준학측정저삼송연매층유효추채반경적방법，급학정합리적추채찬공삼수，이매개질적쌍중공극결구특정이급와사류동이론위기출，근거질량수항정률、Fick정률이급Darcy정률，건립료고필확산-삼류작용적와사류동모형。병이여오매업저삼송연적3＃매층위례，장건립적와사류동모형식입도COMSOL중개전계산，득도료추채찬공주위와사류동규률급불동추채시간적유효추채반경，계산수거여현장측시결과적문합증실료소건립적와사류동모형적유효성，형성료일충학정저삼송연매층추채찬공부근적와사류동규률급추채반경적방법。
In order to find a way to accurately measure drainage radius of the low-permeability soft coal effectively ,and to determine the reasonable drilling drainage parameters ,based on the coal medium’s double-porosity structure characteristics and the gas flow theory ,according to the law of conservation of mass , Fick’s law ,and Darcy’s law ,establish the gas flow model to consider the diffusion-seepage action .Take the industry low-permeability soft 3# coal seam of the Yuwu coal mine for example ,implant the established gas flow model into the COMSOL to carry out the calculation ,we will get the gas flow regularity surrounding the drainage drill hole and the effective drainage radius of the different drainage time .calculating date consistent with the field test results confirm he validity of the established gas flow model ,and form a way of accurately determine the low-permeability soft coal seam surrounding’ s gas flow regularity and drainage radius .