摘要
基于液压支架失稳特点,着重研究液压支架姿态失稳及其控制方法,提出液压支架“自撑、临拉、底推、顶挤”倾覆力矩平衡的三维支护原理和刚柔系数概念,采用倾覆力矩评定液压支架倾倒失稳条件,利用刚柔系数评价液压支架调节能力,基于静力学平衡条件建立液压支架下滑失稳和倾倒失稳2种姿态失稳的矩阵方程,定量分析大倾角综采工作面液压支架稳定性及其调节能力,给出大倾角工作面液压支架与围岩稳定性耦合状态方程,得出大倾角工作面液压支架保持稳定的基本条件。
Based on the characteristics of powered support instability,the attitude instability of powered support and its control method had been studied particularly. This paper presented a 3D supporting mechanism from the balance of overturning moment considering self-supporting,adjacent-pulling,bottom-pushing and top-pressing of powered support and gave the concept of rigid-flexible compositing coefficient. The instability condition of powered support was calculated by the methods of overturning moment and the support regulating ability was evaluated by rigid-flexible compositing coefficient. According to the static equilibrium condition,the matrix equations of powered support in sliding and overturning attitude instability were established. On this foundation,the paper quantitatively analyzed the support stability and its regulating ability in large dip angle coal seam,established the stability coupled equation between supports and surrounding rocks,and concluded the basic conditions for maintaining the stability of powered shield support in large dip angle mining face.
作者
王国法
徐亚军
李丁一
WANG Guofa;XU Yajun;LI Dingyi(Coal Mining Technology Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;China Coal Research Institute,Mining Design Institute,Beijing 100013,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2018年第A02期4125-4132,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点研发计划(2017YFC0804305)
国家自然科学基金重点项目(U1610251)
国家重点基础研究发展计划(973)项目(2014CB046302)~~
关键词
采矿工程
液压支架
稳定性
耦合
倾覆力矩
大倾角煤层
mining engineering
powered support
stability
coupling
overturning moment
large dip angle coal seam
