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以卧龙湖煤矿8102软厚煤层工作面为例,通过现场实测接架前后支架工作阻力及回采巷道表面位移,研究工作面长度变化对工作面矿压显现规律影响。研究结果表明,工作面长度增加导致工作面矿压显现强度减弱及基本顶周期来压步距减小,同时回采巷道超前支承压力剧烈影响距离减小,因此当工作面增长时可适当减小超前支护距离。
Taking Wulonghu Coal Mine 8102 soft and thick coal seam face as an example, the influence of working face length variation on the law of strata behavior is studied by measuring the working resistance of front and rear brackets and the surface displacement of mining roadway on site. The results show that the increase of the working face length leads to the weakening of the rock burst strength at the working face and the decrease of the pressure step on the basic top cycle, and the strong influence of the advance support pressure on the mining roadway decreases. Therefore, when the working face increases, Support distance.