摘要
采用FLAC3D数值模拟软件模拟了超长大采高俯斜工作面顶板下沉量及工作面超前支承压力分布规律,并在此模型的基础上,通过调整采高、面长、采深,对比分析了超长大采高工作面矿压显现特征与常规工作面的差异。研究结果表明:刘庄矿171301大采高综采工作面超前支承压力影响范围大,达到60m;顶板最大下沉量随着采深、面长的增大而增大,增大幅度逐渐减小,随着采高的增大而急剧增大;工作面支承压力峰值随着采深的增大而增大,随采高的增大而减小,峰值位置均向煤壁前方发生迁移;工作面面长对支承压力影响不显著,所以在其他条件不变的情况下,增加面长矿压显现变化不大。
The FLAC3D software was used to study the roof subsidence in super-long large mining height working face and the distribution law of advanced abutment pressure of the working face. Based on this model, through adjusting the mining height, working face length and mining depth, the paper analyzed the differences of strata behavior characteristics between super-long large mining height working face and normal working face. The results indicate： the advanced abutment pressure of 171301 large mining height fully mechanized mining face of Liuzhang Mine has a large influenced range up to 60m; the maximum roof subsidence increases with the increase of mining depth and working face length, the in- creasing--amplitude decreasing gradually, while it sharply increases due to the increase of mining height; the peak of face abutment pressure increases with the increase of mining depth, while decreases with the increase of mining height, and the location of the peak transfers to the front of the coal wall; the effect of working face length on abutment pressure is very feeble, so, the strata behavior characteristics change little with the increase of working face length when keeping other conditions invariable.
出处
《中国煤炭》
北大核心
2013年第1期51-54,共4页
China Coal
基金
国家自然科学基金项目(51174002
51074003)
安徽理工大学博士科研启动基金资助项目(11057)
安徽理工大学青年科学研究基金资助项目
关键词
超长工作面
大采高工作面
矿山压力
采高
数值分析
顶板下沉量
super-long working face, large mining height working face, strata pressure, mining height, numerical analysis, roof subsidence
