岩土力学2017，Vol.38Issue(4)：1148-1153,6.DOI:10.16285/j.rsm.2017.04.028
特厚煤层区段防水煤柱稳定性评价及保护技术研究
Stability evaluation and protection technology of waterproof segment pillar with fully-mechanized caving of ultra-thick coal seam
摘要
Abstract
It is the key to ensure smooth connection and safe mining of fully-mechanized top coal caving face by setting a reasonable segment pillar width.To guarantee the stability and effective water resisting capacity of bilateral segment pillar,an analytical model is established to calculate pillar stress.Pillar stability is assessed by means of numerical simulation and a borehole camera.The reasonable scheme of cutting top blasting successfully reduces the effect of mining-induced stress on the pillars in the vicinity of the 3107 working face,accomplishes pillar stress optimization,and ensures safe mining.The study has a certain significance for determining the width of coal pillar and stress release of segment pillar with hard roof under similar mining conditions.关键词
特厚煤层/区段煤柱/覆岩结构/切缝卸压/应力分布/附加应力Key words
ultra-thick coal seam/segment pillar/overburden structure/roof cutting pressure relief/stress distribution/superimposed stress分类
矿业与冶金引用本文复制引用
何团,毛德兵,黄志增,孙晓冬,张学亮..特厚煤层区段防水煤柱稳定性评价及保护技术研究[J].岩土力学,2017,38(4):1148-1153,6.基金项目
国家自然科学基金项目(No.51504135) （No.51504135）
煤炭科学研究总院科技创新基金项目(No.2015ZYJ001).This work is supported by the National Natural Science Foundation of China (51504135) and the Coal Science Research Institute of Science Technology Innovation Fund (2015ZYJ001). （No.2015ZYJ001）
