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中文摘要：
利用离散元软件UDEC4.0对千秋矿21141综放工作面在巨厚悬空砾岩层下的采动应力分布进行模拟研究。结果表明,随推采面积的加大,砾岩在不断弯曲变形,挠度增大,砾岩体对工作面前方煤体及切眼后方煤体的作用力逐渐增大,并随煤体的开采而重新分布,因此工作面煤体内部支承应力将随着煤体塑性范围的扩大向深部转移,并重新积聚产生新的冲击危险。
英文摘要：
The stress distribution characteristics of the 21141 caving facing in Qianqiu coal mine under the thick impending mining conglomerate layer by discrete element software UDEC4.0 have been studied.Result shows that as the increasing of the mining area,the conglomerate constant bending and deflection,the force of cutting the coal ahead and behind of the caving face are increasing and are redistributed.So the internal bearing stress of coal mining face will expand to deep layer as the plastic deformation of coal increasing,which formed new impact dangerous.
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