煤层注水在三软煤层大采高综采工作面中的应用

单县能源公司根据煤层地质条件选取了合适的注水工艺及注水参数,对大倾角大采高三软煤层综采工作面的煤壁进行超前注水,板结了松软的煤体,有效控制了煤壁片帮和梁端冒落现象,达到了较好的综采面降尘效果,节约了高分子加固材料费用。

Analysis of main roof breaking form and its mechanism during first weightingin longwall face

By field observation and simulating test in shallow seam longwall mining, the asymmetry breaking of main roof is discovered during the first weighting. Based on simulating model test and theoretical analysis, the mechanism of main roof first breaking is revealed, and the asymmetry breaking parameter is determined at all.