Limited Access Drilling
Hoff Geotechnik offers limited access drilling services for mining and civil engineering industry. Hoff Geotechnik’s limited access drilling services were originally developed from landslide remediation and rockfall hazards mitigation projects. Our limited access drilling services have now been extended to cover slope stabilization projects for deep excavations such as mine box-cuts and access portals. Hoff Geotechnik’s limited access drilling system design and safety framework was
- Published in Slope
Geotechnical Monitoring
Mining companies across the world have traditionally used various types of in-situ ground based stability monitoring systems to monitor the stability of both surface and underground mining excavations. However, in the early year 2000 there was a massive shift from the traditional in-situ based ground monitoring techniques towards remote-based slope stability monitoring technologies such as
- Published in Slope
Rockfall Netting for Mine Portal
What is a mine portal: A “mine portal” represents the immediate area surrounding the entrance of an underground mine excavation from “surface” leading up to a tunnel or adit. However, tunnels and adits may also be excavated from the bottom of a vertical mine shaft. Mine portals are usually “driven-in” a few benches from surface
Types of Rockfall Netting
Rockfall refers to quantities of rock falling freely (uncontrolled) from a natural slope or man-made excavation. The term is also a synonym for collapse of rock from an underground mine roof or open pit mine high-wall, also known as fall of ground. Rockfalls are also major hazard in excavations for highways and railways in mountainous terrain. A
Wire Mesh Lacing for Rockfall Protection
Wire-Mesh Lacing for Rockfall Protection Rockfall refers to quantities of rock falling freely (uncontrolled) from a natural slope or man-made excavation. The term is also a synonym for collapse of rock from an underground mine roof or open pit mine high-wall, also known as fall of ground. Rockfalls are also major hazard in excavations for highways and
Rockfall Drapery Installation on Challenging Slopes
Rockfall Drapery Mesh Installation on Challenging Slopes Installations of rockfall drapery systems are never easy; and never the same. Each project has a different set of challenges, with slope conditions and access to the slope as major factors. Hoff Geotechnik was recently appointed to install drapery mesh systems on a tricky slope along a railway
Cost of Rockfall Scaling
Rockfall scaling ranges from simple scaling of loose rock mass with hand-held tools such as “gwala” to more advanced processes such as the sensitive blasting with low energy rock-breaking cartridges. Rockfalls presents major hazards in excavations for open pit mines, highways and railways in mountainous terrain. A rockfall event is generally initiated by climatic and
Grouting of Underground Sinkholes
Underground sinkholes are caused by natural geological processes or the collapse of old underground mines. Generally, naturally forming sinkholes are circular and may be up to 125 m in diameter. Additionally, they are steep sided and deep up to 50m. Usually, they occur with little warning. However, cracks in walls or settlement of the ground
- Published in Slope
Rockfall Scaling Techniques
Rockfall scaling ranges from simple scaling of loose rock mass with hand-held tools such as “Gwala” to more advanced processes such as the sensitive blasting with low energy rock-breaking cartridges. Rockfalls presents major hazards in excavations for highways and railways in mountainous terrain. A rockfall event is generally initiated by climatic and biological event that
About Rockfall Hazard Mitigation
What is Rockfall Hazards Mitigation? Definition: Rockfall refers to quantities of rock falling freely (uncontrolled) from a natural slope or man-made excavation. The term is also a synonym for collapse of rock from an underground mine roof or open pit mine high-wall, also known as fall of ground. Rockfalls are also a major hazard in excavations for
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