急倾斜煤层工作面应力分布特征数值模拟研究

Numerical simulation study on the stress distribution behavior in steeply inclined coal seam working face

基于街洞矿区茶山岭矿3383工作面地质条件,建立类似数值模型,进一步研究急倾斜煤层工作面在开采过程中存在的应力分布特征。通过FLAC3D软件进行数值模拟,对比出不同倾角煤层和不同工作面推进长度的相应采场应力分布特征和范围。研究结果表明,随着煤层倾角在不断扩大,倾向煤柱内应力也在不断减小,围岩破坏范围形状会发生转变。随着推进距离的增加,工作面采空区面积逐渐扩大,垂直应力分布等值线也存在非对称特性。

Based on the geological conditions of the 3833 working face of Chashanling Mine in Jiedong Mining Area, a similar numerical model was established to further study the characteristics of mine pressure in the mining process of steep inclined coal seam. The numerical simulation was carried out by FLAC3 D software to ensure that the inclined mining face was compared with the corresponding stress distribution characteristics and range of different dip angle coal seams and different working face propulsion lengths during the overall mining process. The results showed that as the dip angle of the coal seam was expanding, the internal stress of the coal pillar was also decreasing, and the shape of the surrounding rock failure zone would change. With the increase of the propulsion distance, the goaf area of the working face was gradually enlarged, and the contour of the vertical stress distribution also had an asymmetrical characteristic similar to the "butterfly wings".