煤矿安全2019，Vol.50Issue(5)：226-230,5.DOI:10.13347/j.cnki.mkaq.2019.05.055
大采高综采采场基本顶周期破断特征研究
Research of Main Roof Periodic Fracture Features in Fully Mechanized Coalface with Large Mining Height
摘要
Abstract
To study the effect of supports and gob waste rock on the periodic fracture characteristics of the main roof in mechanized face with large mining height, the characteristic quantity of supporting effect is introduced, the mechanical model of roof rock beam is established, and the periodic fracture characteristics of basic roof are analyzed. The results show that the main roof periodic fracture interval increases with the increase of the thickness and tensile strength of main roof and the decrease of the load value under the same supporting condition; and main roof periodic fracture interval increases with the increase of the supporting strength and roof distance of the support and gob waste rock under the same mining condition. In combination with in-situ monitoring, the main roof periodic fracture feature was verified.关键词
大采高综采/基本顶/周期破断距/支撑作用/顶板岩梁Key words
fully mechanized mining with large mining height/main roof/periodic fracture interval/supporting effect/roof rock beam分类
矿业与冶金引用本文复制引用
王创业,纪洪广..大采高综采采场基本顶周期破断特征研究[J].煤矿安全,2019,50(5):226-230,5.基金项目
国家自然科学基金资助项目(41641036,51504241) （41641036,51504241）
