摘要
针对深部半煤岩回采巷道围岩结构的非连续性及变形破坏的非协调性,以某矿92105工作面半煤岩回采巷道的具体工程地质为背景,采用Abaqus建立了半煤岩巷道数值计算模型,研究了不同煤岩界面位置、不同煤岩界面倾角等主控因素下巷道的围岩应力与变形破坏规律,揭示了深部半煤岩巷道围岩变形破坏失稳机理。结果表明:巷道开挖后在煤层位置处的巷道帮部变形破坏较大;随着煤层倾角的增加,巷道主应力差值集中区逐渐向帮部转移,致使巷道的整体变形减小,仅在煤层位置处出现局部较大变形。针对深部半煤岩巷道围岩非对称变形破坏特征,提出了关键部位非对称耦合支护对策,计算结果表明该支护对策可有效地控制半煤岩巷道围岩变形破坏的非协调性,保证了巷道的长期稳定。
In view of the non-conformity of discontinuous structure of surrounding rock of deep half coal rock roadway and deformation, taking the specific engineering geological conditions of a coal mine 92105 working face in the half coal rock roadway as background, Abaqus software has been used to build the half coal rock extraction roadway model, study the stress, displacement and plastic zone distribution under the main controlling factors such as different coal and rock interface position and coal rock interface dip, and reveal the mechanism of deformation and failure of surrounding rock of deep soft rock roadway. It shows that the large deformation occurs in the tunnel in coal seam at the position of the side seam location; with the increase of the coal seam inclination, the concentration area of the principal stress difference gradually shift to the roadway＇s sides, which causes the decrease of the overall deformation of roadway, and the large deformation only appears in the coal seam location. In rerock, the asymmetric coupling support countermeasure in key parts has been put forward, and the results show that： this support countermeasure can effectively control the non-conformity of the rock deformation failure in half coal rock roadway, guaranteeing the stability of the roadway surrounding rock.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2015年第6期963-967,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(51274191)
教育部博士点基金项目(20130095110018)
国家重点基础研究发展计划(973)项目(2014CB046905)
