贵州大湾露天煤矿外部排土场协同设计与稳定性分析OA

To address the disconnect between stability assessment and drainage,reclamation design for the high-storage waste dump in Guizhou Dawan Open-pit Coal Mine,through engineering geological surveys,laboratory testing and numerical simulation,we obtain the physical and mechanical parameters of rock-soil mass,and present cooperative design scheme of"zonal backfilling-layered compaction-graded slope-multi-level drainage-ecological restoration"approach,conduct stability and drainage capacity calculation under multiple scenarios for representative profiles and retaining walls using LIZHENG Geotechnical Analysis Software Version 7.0 and GE05-2022-CHN geotechnical calculation program.The results show that under normal and rainstorm conditions,the safety factors of external dump slope range from 1.28 to 1.46 and from 1.15 to 1.31,respectively.All stability indicators for the retaining wall and the flood discharge capacity of the drainage system meet code requirements.This cooperative design system ensures the long-term stability and safety of the external dump,and realizes efficient reclamation and utilization of land for external dump,which provide technical reference for the design and development of open-pit coal mine external dump in southwestern karst mountainous areas.