煤矿分布式地下水库煤柱坝体合理布置方式
Reasonable Arrangement Mode About Coal Pillar Dam of Distributed Groundwater Reservoir in Coal Mine
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摘要: 针对神东矿区大柳塔矿特定的地质条件和现代化开采技术,采用相似模型试验的方法,分析研究了煤矿分布式地下水库煤柱坝体的留设及其稳定性问题,对分布式地下水库的煤柱布置方式进行了划分:在垂直于煤层平面方向上可分为对齐布置和错开布置,在平行于煤层平面方向上可分为短工作面布置和长工作面布置。基于此,提出了煤柱坝体的合理留设方式:在平行于煤层平面方向上,煤柱的布置方式以工作面开采形成的采空区破裂带高度略小于两煤层的层间距为宜;在垂直于煤层平面的方向上煤柱的布置方式以对齐布置为宜。Abstract: Aiming at the specific geological conditions and mining technology modernization about Daliuta Mine, the method of similarity model test is adopted in this paper, the arrangement and stability about coal pillar dam for distributed groundwater reservoir in coal mine was analyzed and studied, the layout method of coal pillar for distributed underground reservoir is divided: in the vertical direction of the seam plane, including alignment arrangement and stagger arrangement; in the parallel direction of the seam plane, including short working face layout and long working face layout. Based on this, the reasonable design method of coal pillar dam was proposed: in the parallel direction of the seam plane, the layout of coal pillar was better, in this case, the fracture zone height caused by goaf of working face mining is smaller than the two seam spacing; in the vertical direction of the seam plane, the alignment top and bottom of coal pillar was better.
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