矿井沿空掘巷瓦斯分布规律分析

Analysis of Gas Distribution Law in Gob-side Driving Roadway of Mine

主要通过运用FLAC3D软件对某矿的沿空采动煤体进行数值模拟分析,回采工作面开采完后,煤体受采动影响,煤体发生应力变化,在距沿采空煤壁面8～15 m之间,煤体产生塑性破坏的区域。数值模拟分析得出,瓦斯压力在煤体内距沿空煤壁大约11 m处呈现出明显下降趋势。

The numerical simulation analysis of gob-side mining coal body in a mine is carried out by using FLAC 3 D software. After mining, the coal body is affected by mining, and the stress changes occur in the coal body. In the area between 8 and 15 m away from the gob wall, the coal body produces plastic damage. The numerical simulation analysis shows that the gas pressure in the coal body is about 11 meters away from the coal wall along the goaf, showing a significant downward trend.