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.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
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)
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
long wall with top coal caving with great mining height
mining height
need-controlled rock
ultimate subsidence value
potential subsidence value
