特厚煤层大采高综放开采支架外载的理论研究  

Theory study on the load on support of long wall with top coal caving with great mining height in extra thick coal seam

作　　者：闫少宏[1] 

机构地区：[1]煤炭科学研究总院开采设计研究院,北京100013

出　　处：《煤炭学报》2009年第5期590-593,共4页Journal of China Coal Society

基　　金："十一五"国家科技支撑计划重大资助项目(2008BAB36B01)

摘　　要：从理论上分析认为,特厚煤层综放开采直接顶、老顶范围明显加大;从能否对支架产生变形压力角度将顶板岩层分为"无变形压力岩层"和"有变形压力岩层",并给出了综放支架所受外载的解析计算式,依此分析了特厚煤层大采高综放开采因采厚加大,"有变形压力岩层"的范围将明显加大,从而导致矿压显现异常强烈的原因.On theory study, the range of immediate roof and main roof obviously increased with top coal caving in extra thick coal seam. Based on the deformation pressure on support, the roof of coal was divided into rock without deformation pressure and rock with deformation pressure. Analytic formula of the load on caving support was put forward. Based on this formula, the reason was analyzed that pressure was exceptional intensity while the range of rock with deformation pressure obviously increased of long wall with top coal caving with great mining height.

关 键 词：大采高综放开采 采厚 需控岩层 极限下沉量 可能下沉量 

分 类 号：TD823.97[矿业工程—煤矿开采]