煤矿安全2019，Vol.50Issue(10)：93-97,5.DOI:10.13347/j.cnki.mkaq.2019.10.021
多巷布置充填留巷围岩变形特征及补强支护技术
Deformation Characteristics and Reinforcement Support Technology of Surrounding Rock in Multi-Lane Filling and Retaining Roadway
摘要
Abstract
In order to solve the serious problem of surrounding rock deformation of dynamic pressure roadway with multiple roadway layout and filling entry retaining in Xinyuan Coal Mine, based on the field monitoring characteristics of roadway surface displacement change, leading supporting stress change law and numerical simulation of roadway plastic zone change law, and according to the deficiency of the original supporting form, the support optimization scheme suitable for large deformation of multi-roadway roadway is proposed, and the industrial test of optimized reinforcing support is carried out in underground. The measured results show that the surrounding rock starts to deform after it enters the influence area of abutment pressure, but the deformation amount is not large; after the original support scheme was applied in working face, the floor heave of the roadway increased sharply. According to the field observation and numerical simulation analysis of the change law of the plastic zone, both the roof and the two sides of the reinforcement measures after the optimization of support were reduced, and the floor heave was reduced by about 50%. The optimization of the reinforcement scheme improved the quality of the roadway surrounding rock.关键词
充填留巷/动压巷道/超前支承应力/补强支护/数值模拟Key words
filling entry retaining/dynamic pressure roadway/advance support stress/enhanced support/numerical simulation分类
矿业与冶金引用本文复制引用
玄忠堂,赵善坤,杨晓成,杨勇,吕坤..多巷布置充填留巷围岩变形特征及补强支护技术[J].煤矿安全,2019,50(10):93-97,5.基金项目
国家重点研发计划资助项目(2017YFC0804205, 2017YFC0804201) （2017YFC0804205, 2017YFC0804201）
国家自然科学基金资助项目(51574150, 51704159,51674143) （51574150, 51704159,51674143）
