煤矿安全2017，Vol.48Issue(7)：95-98,102,5.DOI:10.13347/j.cnki.mkaq.2017.07.025
沿空留巷不均衡承载围岩控制技术
Unbalanced Bearing Surrounding Rock Control Technology of Gob-side Entry Retaining
摘要
Abstract
According to the unbalanced bearing phenomenon of 3414 working face in Xinyuan Coal Mine,based on the production geological conditions of 3414 working face,the bearing capacity mechanics model and UDEC Trigon numerical calculation model are established.The theoretical bearing coefficient of roadway unbalance is 2.93,which indicates that the bearing capacity of roadway coal body is larger than that of filling body;the rationality of micro-mechanics parameters of the rock strata in the model is validated.It is found that the fracture of surrounding rock is mainly shear fracture,the roof in mining area occurs tension and shear damage under the influence of strong vertical pressure of basic roof and the filling body;it shows that the area is a weak link in the control of the surrounding rock.The industrial experiment shows that the comprehensive control technology of the surrounding rock effectively controls the surrounding rock stability of the gob-side entry retaining.关键词
沿空留巷/不均衡承载/力学模型/UDEC Trigon/围岩控制Key words
gob-side entry retaining/unbalanced bearing/mechanics model/UDEC Trigon/surrounding rock control分类
矿业与冶金引用本文复制引用
李国栋,王襄禹..沿空留巷不均衡承载围岩控制技术[J].煤矿安全,2017,48(7):95-98,102,5.基金项目
国家自然科学基金资助项目(51474209) （51474209）
