This article relied on Key Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period Development and Research of Key Technology for Complicated and Rich Water Deposit Mining(2006BAB02A01). According to the engineering condition of 8# ore body in Huize Lead & Zinc mine of Yunnan Chihong Lead & Ge Co., LTD., and integrating research methods of engineering geological survey, theory analysis, numerical simulation and on site monitoring based on rock mass mechanics theory...