Application of Stress, Geologic, and Support Design System (Sgsm) to Ground Control for Mine Slope Entries

摘要

Accurate evaluation of stress and geological conditions iscritical to ground control design in underground openings. For amine slope entry, the problem becomes more complicated becausea slope transverses through many different types of strata. Mineslope ground control has traditionally been practiced based on trialand error and prior experience. There is currently no well-acceptedslope and support design methodology available for an economicaland technically sound ground control plan. Over the last few years,Keystone Mining Services, LLC (KMS), the engineering affiliatecompany of Jennmar Cooperation, has developed a ground supportdesign methodology called the “Stress, Geologic, and Supportdesign system” (SGSSM). This patent pending method enablesaccurate analysis of actual geo-technical conditions and stress;identifies strong, fair, and weak sections along the slope; formulatesprimary and supplemental roof bolting systems, designs optimallong-term steel structure support; and verifies the adequacy of thedeveloped support. The method has been successfully utilized onvarious new slope projects and has been well received by state andfederal regulatory agencies during the approval process. This paperdetails the concepts of the methodology using an actual case studyof a slope project in the Midwest.