摘要
为了研究软弱顶板和坚硬顶板对沿空巷道围岩的影响作用,采用二维有限差分软件FLAC2D进行计算分析。分析结果表明,随着开采深度的增大,软弱顶板巷道围岩变形以顶底板和两帮为主。坚硬顶板巷道围岩变形是以底板和两帮变形为主。坚硬顶板沿空巷道的底臌变形比较大,在开采过程中需注意底臌变形。
In order to analyze the effect of the soft-weak roof and hard roof to the surrounding rock of the gob-side entry, the numerical simulation has been made by two-dimension finite differential code for FLAC2D. The analytical results indicate that with the increase of mining depth, the deformation of the surrounding rock for the soft-weak roof mainly oceurrs in the roof, floor and two sides; for the hard roof, the deformation of the surrounding rock mainly happens in the floor and two sides. The value of the deformation of the floor heave for the gob-side entry of the hard roof is higher than that of the soft-weak roof, so it needs to pay more attention to the deformation of the floor heave in the process of the mining construction.
出处
《煤炭技术》
CAS
北大核心
2012年第10期62-64,共3页
Coal Technology
关键词
沿空巷道
软弱顶板
坚硬顶板
数值计算
gob-side entry
soft-weak roof
hard roof
numerical simulation
