中文摘要：

为了减少特厚煤层综放开采工作面煤柱过大造成的煤炭损失,首先采用理论对区段煤柱宽度的合理取值范围进行理论计算,然后通过FLAC3D数值模拟,分析煤柱侧向支承应力、塑性区的分布,更直观的反映出在不同煤柱宽度情况下,马鞍形应力曲线和弹性核区域的发展过程,从而验证了理论计算所得出的区段煤柱的合理尺寸.

英文摘要：

In order to reduce the coal lost caused by the oversize coal pillar in the fully mechanized top coal caving mining face in the ultra thick seam,a theory was applied to the theoretical calculation on the rational value selection range of the section coal pillar width.Then with the FLAC3D numerical simulation,the side support stress of the coal pillar and the distribution of the plastic zone were analyzed and could directly reflect the development process of the saddle-shaped stress curve and the elastic core area under the condition of different coal pillar width,which could verify the rational size of the sectional coal pillar obtained from the theoretical calculation.