多煤层条带开采煤柱稳定性评价方法研究  

Evaluation method for pillar stability during strip mining in multiple coal seams

作　　者：邓喀中[1,2] 范洪冬[1,2] 谭志祥[1,2] 张宏贞[1,2] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]江苏省资源环境信息工程重点实验室,江苏徐州221116

出　　处：《中国科技论文在线》2009年第11期824-829,共6页

基　　金：国家自然科学基金(50474064)

摘　　要：条带开采是国内外应用最广泛的控制地表沉陷、保护地面建筑物和生态环境的技术,同时也是绿色开采技术体系的主要技术措施之一。条带开采煤柱稳定性是条带开采设计的关键,国内外对单一煤层开采条带煤柱稳定性研究较多,对多煤层条带开采煤柱稳定性研究较少,为此,在系统分析影响多煤层条带煤柱稳定性因素基础上,获得了在上下煤柱不对齐条件下,影响煤柱稳定性的最大因素是下煤层的开采宽度。在此基础上,基于梁理论,建立了多煤层条带开采层间应力、下煤层开采宽度计算式及上下煤柱稳定性评价方法,计算与实测结果证明了所提出方法的正确性,为多煤层条带开采煤柱稳定性评价提供了理论方法。Strip mining is a technology that is widely applied to control surface subsidence and protect ground buildings and ecological environment at home and abroad. Meanwhile, it is also one of the main technical methods for the green mining technique system. Pillar stability is the key to the design of strip mining. Many studies have been conducted on pillar stability during strip mining in single coal seam, and less for multiple coal seams. Based on systematic analysis on the influencing factors for pillar stability of multiple coal seam strip mining, the mining width in the lower seam is the key factor affecting pillar stability in the upper seam, when pillars in the upper seam and the lower seam are not aligned. Based on the beam theory, the formulas for the interlaminar stress in multiple coal seam strip mining and the mining width of the lower seam, as well as an evaluation method for pillar stability in the upper coal seam and the lower coal seam are established. Comparison between the calculated and measured data proves that the method proposed in this paper is correct and it can be applied as a theoretical method to evaluate pillar stability during strip mining in multiple coal seams.

关 键 词：多煤层 条带 稳定性 评价 开采沉陷 

分 类 号：TD822.3[矿业工程—煤矿开采]