松软煤层稳定顶板综放工作面的矿压显现特点

Characteristics of strata behaviors of fully mechanized caving face in soft coal and stable roof conditions

针对乌兰煤矿5343综放工作面的特殊开采条件,采用现场矿压观测和综合分析方法研究了松软煤层稳定顶板综放工作面的矿山压力显现规律,掌握了其矿压显现的基本特点。5343综放工作面顶板初次来压步距24.2 m,周期来压步距平均9.41m,工作面支架平均载荷和最大载荷的差距不大,但支架前柱的载荷显著大于后柱的载荷。该结论有助于提高这类综放工作面的安全生产水平。研究结果表明,与一般的松软煤层综放工作面相比,松软煤层稳定顶板综放工作面的矿山压力显现相对比较剧烈,工作面存在着比较明显的周期来压现象,工作面煤壁片帮冒顶更为严重,工作面顶板管理难度很大;

According to the unusual mining conditions of the 5343 fully mechanized caving face of WuLan colliery, the law of the strata behaviors of fully mechanized caving face in soft coal and stable roof conditions are researched with the methods of ground pressure observation and synthetic analysis, the basic characteristics of the strata behaviors have been acquired. In the face, the first weighting distance is 24.2m, the periodic weighting average distance si 9.41m, and the average load and the maximum load of supports is not different too. The results show that, compared with the fully mechanized caving face in ordinary soft coal seam, the strata behavior of the fully mechanized caving face in soft coal and stable roof conditions is comparatively obvious, and the face has notable periodic weighting phenomena and the serious wall spalling and roof fall, the face roof management is very difficult. The conclusion helps to enhance the safe producing level of this face.