Study on porosity distribution of porous media in mine gob based on UDEC

作者：Ming Yang^*; Jianliang Gao; Xiaomin Jin

来源：Electronic Journal of Geotechnical Engineering, 2014, 19 T: 4619-4630.

• Flow field distribution
• Fractured rock mass
• Gob
• Mechanical model
• Overlying strata
• Pore distribution
• Porosity distributions
• Sediment distribution

Bulking features of falling rocks and pore distribution in gob are key parameters influencing flow field and gas migration; and the correct selection of above parameters will produce a significant impact on permeability computation and flow field distribution in gob. In this brief where Zhao Village 3304 coal face of Jincheng Anthracite Mining Group is taken as an example, a physical mechanical model is established and the numerical analysis software of UDEC is applied to study the overlying strata falling state and sediment distribution in gob after the coal face is mined. The study show that, the sediment of roof overlying strata is similar to "dustpan" shaped distribution. on the surface at the same height in gob, if it is nearer the coal face, up and down crossheading areas (support and coal wall support area), the porosity enlarges, but it decreases towards the postmedian gob; in vertical height direction of gob, the pore fracture of fractured rock mass will develop less with the increase in height in a 0.1~0.28 variation range of porosity.

• 出版日期2014
• 单位Polytechnic university