【摘要】 结合西石门铁矿采空区顶板冒落的实际观测数据 ,提出顶板冒落的“打气筒”和“绕流”2种类型 ,并对“绕流”模型进行了详细的计算与分析 ,得出了避免冲击危害的安全距离 ,提出了预防采空区顶板冒落危害防治的具体技术措施。更多还原

【Abstract】 Based on the practical observation data of the roof fall in mined area at Xishimen Iron Mine,two kinds of models for roof fall,namely "inflator" and "surrounding flow",are proposed. Through detailed calculation and analysis of "surronding flow" model, the safety distance of avoiding the danger of striking airstream is obtained and technical measures for controlling the roof fall in mined area are suggested.更多还原