Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one coal mine. After extracting the No.15seam, the overlying strata movement and the deformation ...Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one coal mine. After extracting the No.15seam, the overlying strata movement and the deformation of the No.9-10 protected seamwere studied. The experiment results show that it is feasible to destress the protectedseams with large interburden thickness. When the face had advanced 200 m from thesetup room, the No.9-10 seam was fully destressed, resulting in easy gas drainage in thedestressed zone. Recommendations on mining sequence of multiple seams mining in thesame coal areas were made.展开更多
基金Supported by Ministry of Education Doctoral Foundation (20070460001)Natural Science Foundation of Henan Province (0623021400)
文摘Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one coal mine. After extracting the No.15seam, the overlying strata movement and the deformation of the No.9-10 protected seamwere studied. The experiment results show that it is feasible to destress the protectedseams with large interburden thickness. When the face had advanced 200 m from thesetup room, the No.9-10 seam was fully destressed, resulting in easy gas drainage in thedestressed zone. Recommendations on mining sequence of multiple seams mining in thesame coal areas were made.
