Support technology for mine roadways in extreme weakly cemented strata and its application  

作　　者：Meng Qingbin Han Lijun Qiao Weiguo Lin Dengge Fan Jiadong 

机构地区：[1]State Key Laboratory of Geomechanics and Deep Underground Engineering,China University of Mining & Technology [2]College of Civil Engineering and Architecture,Shandong University of Science and Technology

出　　处：《International Journal of Mining Science and Technology》2014年第2期157-164,共8页矿业科学技术学报（英文版）

基　　金：Financial support for this work, provided by the Major Program of the National Natural Science Foundation of China (Nos. 51174196 and 51204168);the Program for New Century Excellent Talents in University by Ministry of Education of China (No. NCET-07-0519)

摘　　要：For the engineering geology conditions of bad mine roadway roof and floor lithology in extremely weak cemented strata, the best section shape of the roadway is determined from the study of tunnel surrounding rock displacement, plastic zone and stress distribution in rectangular, circle arch and arch wall sections, respectively. Based on the mining depth and thickness of the coal seam, roadway support technology solutions with different buried depth and thickness of coal seam are proposed. Support schemes are amended and optimized in time through monitoring data of the deformation of roadway, roof separation, l-beam bracket, bolt and anchor cable force to ensure the long-term stability and security of the roadway surrounding rock and support structure. The monitoring results show that mine roadway support schemes for different buried depth and section can be adapted to the characteristics of ground pressure and deformation of the surrounding rock in different depth well, effectively control the roadway surrounding rock deformation and the floor heave and guarantee the safety of construction and basic stability of surrounding rock and support structure.For the engineering geology conditions of bad mine roadway roof and floor lithology in extremely weak cemented strata, the best section shape of the roadway is determined from the study of tunnel surrounding rock displacement, plastic zone and stress distribution in rectangular, circle arch and arch wall sections, respectively. Based on the mining depth and thickness of the coal seam, roadway support technology solutions with different buried depth and thickness of coal seam are proposed. Support schemes are amended and optimized in time through monitoring data of the deformation of roadway,roof separation, I-beam bracket, bolt and anchor cable force to ensure the long-term stability and security of the roadway surrounding rock and support structure. The monitoring results show that mine roadway support schemes for different buried depth and section can be adapted to the characteristics of ground pressure and deformation of the surrounding rock in different depth well, effectively control the roadway surrounding rock deformation and the floor heave and guarantee the safety of construction and basic stability of surrounding rock and support structure.

关 键 词：Extreme weakly cemented strata Mining gateway Support technology Numerical simulation with FLAC3D 

分 类 号：TD353[矿业工程—矿井建设]