Characteristics of Strata Behaviors on Coal Face with Sublevel Caving in Lower-slicing and Its Overlying Strata Control
Based on fully mechanized mining in slicing, fully mechanized mining with sublevel caving (FMMSC) has gradually been developed in China. But some large coal mines, which fully mechanized mining in slicing has been employed, are confronted with problems of FMMSC in lower-slicing while upper-slicing of thick seam has been mined out. According to a mass of observation data on rock pressure, the authors explained the essential characteristics of strata behaviors in FMMSC in lower-slicing, by compare it with FMMSC in whole-seam. It is the structure mechanical model of overlying strata on coal face with sublevel caving (CFSC) in lower-slicing in Changcun Coal Mine of Yima Coal Group of China that was set up. The model gave an account for that the equilibrium structure with stacked layer of blocks of main roof in CFSC in lower-slicing moves into a higher stratum. Since rock mass strength of upper-immediate roof is very high and the size of rock mass is large, a semi-arch equilibrium structure with stratum-rock sometimes can be formed. Its periodic destabilization and caving can lead to a behavior of small periodic weighting in CFSC in lower-slicing. While periodic destabilization and caving of the equilibrium structure with stacked layer of blocks of main roof will cause a behavior of large periodic weighting. The conclusions are enriched the theory on mining with sublevel caving.
thick coal seam lower-slicing fully mechanized mining with sublevel caving (FMMSC) strata behaviors overlying strata control
ZHAI Xin-xian XU Rengui
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023, Liaoning, School of Energy Science and Engineering, Henan Polytechnic University, Jaozuo 454000, Henan, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
607-613
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）