近浅埋煤层大采高综采工作面矿压显现规律研究

Research on strata behaviors of fully-mechanized coal mining face with large mining-height in near shallow seam

为探究近浅埋煤层关键层结构运动对大采高综采工作面来压显现的影响,结合理论分析和数值模拟等方法,对采场覆岩运动特征及其对来压的影响进行了研究。研究发现:近浅埋采场来压步距较小,且主、亚关键层间不同的破断距和破断形式的相互作用直接导致采场周期来压强度均呈现非均匀性周期变化。同时对近浅埋煤层大采高综采工作面的来压规律进行合理预测,并在现场实践中得到验证。

In order to research the impact of the key-stratum structure on the strata-pressure laws of fully-mechanized coal face with large mining-height in near shallow seam, the motion characteristics of overlying rock strata were studied by means of theoretical analy-sis ,numerical simulation and field measurement. The study shows that, the periodic roof weighting pace in near shallow seam is much less than general mining face, the periodic pressure takes on some evident non-uniformity and periodic change under the influence of in-teractions between the two key-strata^ weighting steps and fracture forms. Besides,the strata laws of fully-mechanized face with large mining-height in near shallow seam were predicted, and these entire conclusions were testified by the field experiments.