Subsidence Ground Voids

############################# Video Source: www.youtube.com/watch?v=u5hSykSEpdU

Sio Silica has developed a new patented technology for mining silica. Using the Room and Pillar method to extract the sand raises questions about ground lowering and voids, otherwise referred to as subsidence. • Brent Bullen, Chief Operations Officer, explains how world-recognized engineering firm Stantec has analyzed the science of rock mechanics, specifically in the Vivian Sand Project to provide reporting on how to do this safely and responsibly. • Room and Pillar mining is the removal of underground material to create a room, then leaves surrounding material as the pillar to support the surface. The Vivian Sand Project operates within the recommended engineering void calculation buffers based on geotechnical modeling and extensive core logs, drilling and lab testing. Each cluster of wells can be drilled within natural clearings on the land up to 100 metres apart, which in return has a minimal effect on the surface. We continually measure and monitor for land subsidence using Bernstein rods. • Some concerns stem from the dissolution of the limestone. However, the limestone (Red River) formation was deposited in the Late Ordovician and there have been no indications of dissolution. • #viviansilicaproject #silica #subsidence

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