Catastrophe mechanism and disaster countermeasure for soft rock roadway surrounding rock in Meihe mine  

作　　者：Yu Yang Zhu Caikun Chong Deyu Liu Yang Li Sichao 

机构地区：[1]School of Mines,China University of Mining & Technology [2]Key Laboratory of Deep Coal Resource Mining,Ministry of Education of China,China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》2015年第3期407-413,共7页矿业科学技术学报（英文版）

基　　金：provided by the National Natural Science Foundation of China(Nos.51204166 and51174195);the Jiangsu Province ordinary university graduate research innovation projects(No.CXZZ12_0954)

摘　　要：The soft rock's heterogeneity and nonlinear mechanical behavior cause extremely difficult maintenance on the soft rock roadway. Aiming at the asymmetric deformation and destruction phenomenon appearing after excavating and supporting the 7101 air return way in Meihe mine, this paper comprehensively adopted a variety of methods to analyze the roadway surrounding rock deformation rule, obtaining the roadway surrounding rock stress and plastic zone distribution rule under no supporting condition and the roadway surrounding rock deformation features under original symmetric supporting condition.Furthermore, this paper revealed the catastrophe mechanism, and proposed the concept of ‘‘weak structure'' and the disaster countermeasure of ‘‘overall stabilizing the roadway and strengthening the support of weak structure''. The industrial test shows that the disaster control technology can realize the coordination deformation of the supporting structure and roadway surrounding rock, thus significantly controlling the deformation of roadway surrounding rock.The soft rock’s heterogeneity and nonlinear mechanical behavior cause extremely difficult maintenance on the soft rock roadway. Aiming at the asymmetric deformation and destruction phenomenon appearing after excavating and supporting the 7101 air return way in Meihe mine, this paper comprehensively adopted a variety of methods to analyze the roadway surrounding rock deformation rule, obtaining the roadway surrounding rock stress and plastic zone distribution rule under no supporting condition and the roadway surrounding rock deformation features under original symmetric supporting condition. Furthermore, this paper revealed the catastrophe mechanism, and proposed the concept of‘weak struc-ture’ and the disaster countermeasure of‘overall stabilizing the roadway and strengthening the support of weak structure’ . The industrial test shows that the disaster control technology can realize the coordination deformation of the supporting structure and roadway surrounding rock, thus significantly controlling the deformation of roadway surrounding rock.

关 键 词：Soft rockAsymmetric Catastrophe Theoretical analysis Numerical simulation Weak structure 

分 类 号：TD322[矿业工程—矿井建设]