【摘要】 以平煤集团公司四矿新建千米进风井为例,系统研究了新建风井留设小保护煤柱的可能性,提出了井筒抗变形技术措施,为深部矿井风井建设提供了可资借鉴的技术途径。更多还原

【Abstract】 A systematic study is made of the possibility of protecting the 1000 m new air intake shaft with a small - sized coal pillar at the No. 4 Mine of Pingdingshan Coal Industrial ( Group) Co. , and the technical measures for guarding the pillar - protected shaft against deformation are proposed. The result of study may provide a valuable technical approach for reference by other mines in the construction of air shafts at depth.更多还原