被保护煤层变形特性和渗透率变化规律研究

Study on deformation characteristics and permeability changing laws of protected coal seam

为了研究被保护煤层变形特性和渗透率变化规律,理论分析了煤体渗透率和损伤变形关系、加载过程中煤体的渗透率变化,采用FLAC^3D数值软件,模拟分析了1201工作面开采时和1202工作面开采时,13号煤层的垂直应力分布特征以及1202工作面开采后13号煤层渗透率分布。研究为后期巷道支护和瓦斯抽放设计提供理论支持。

In order to study the deformation characteristics and permeability change law of the protected coal seam,this paper theoretically analyzed the relationship between coal permeability and damage deformation,and the permeability change of coal during loading.With the application of FLAC 3D numerical software the vertical stress distribution characteristics of No.13 coal seam and permeability distribution of No.13 coal seam after 1202 coal face mining were simulated and analyzed.The study can provide theoretical support for the design of late roadway supporting and gas drainage.