【摘要】 为提高坚硬厚煤层放顶煤开采回采率,本研究借助FLAC3D数值分析手段,对采用爆破技术弱化顶煤的参数进行数值模拟,最终获得装药量与煤岩体破坏程度、对钻孔周围介质的扰动频率、在钻孔周围介质中引起的剪应力大小三方面规律,为煤矿现场顶煤弱化爆破参数选择提供依据。更多还原

【Abstract】 In order to improve mining rate of top coal caving in hard thick coal seam,the blasting parameters of top coal weakening have been researched by FLAC3D numerical analysis in this paper,as the result,the three aspects laws about charge weight with degree of rock and coal damage,perturbation frequency of hole material and shear stress value have contained.The research conclusion will provide according for choosing top coal weakening blasting parameters in coal mine.更多还原