Rock Face Support
the face with the correct support products and to support the face as designed and required by the mining engineers. The possible reasons for falls of ground, possible support methods and the products available will be discussed in this presentation. BASIC FACE BEHAVIOR AFTER EXPOSURE Before mining commences, the rock environment is subjected
Therefore, the maximal support pressure has to be smaller than 90 per cent of the total vertical stress at the tunnel crown . It is necessary to point out, passive failure of the tunnel face due to high support pressure is unlikely to happen. Before reaching this limit, support medium will blow-out from the excavation chamber.
Rock dowels as illustrated in Figure 42, are typically used on newly excavated slopes. They can be installed in a grid pattern to support an entire face or used to support one block. They provide initial reinforcement through the shear strength of the steel, which increases friction along the potential plane of weakness.
Generally, rock scaling is the first step in a more comprehensive rockfall mitigation strategy, but in some instances, it may be sufficient to stabilize a rockface by itself. Rock Bolting. Rock bolting is a long-term stabilization strategy through which a steel rock bolt drilled into the rock formation provides support for the entire rock face
Learn about rock face stabilization and construction for rock faces on our SESI Learning Series on our website. sesi-learning-series-rock-face-stabilization-design-construction It can be used to replace support of an existing rock feature that may have become undermined. In this application, the shotcrete is used to fill a void within the
Contractor Support. THE CLIFFS CITY OF JERSEY CITY, NEW JERSEY The rock face stability assessment required the stabilization of an existing rock face cliff approximately 67 to 83 feet in vertical height and a span of 560 feet along an existing property located at 100 Paterson Plank Road in the City of Jersey City, Hudson County, New Jersey
Basic Function Rock slope stabilization is used primarily as a preventative measure for both man-made and naturally occurring rock faces but is also implemented as a solution to rock slides, discontinuities in a rock face, or any detected instabilities that would present a danger to the integrity of the rock face.
Rock support is the term widely used to describe the procedures and materials used to improve the stability and maintain the load bearing capacity of rock near to the boundaries of an underground excavation. In this paper, a distinction is drawn between rock reinforcement or active support, where the supporting elements are an
Surface Rock Support Code Practice for Underground Mines Rock falls are an ever-present hazard in underground mining, especially in unsupported ground. They are primarily caused by discontinuities andor high or low adverse stresses in the rock mass. The intersection of three or more joints or fractures with the back, face or side wall of an excavation
Rock dowels as illustrated in Figure 42, are typically used on newly excavated slopes. They can be installed in a grid pattern to support an entire face or used to support one block. They provide initial reinforcement through the shear strength of the steel, which increases friction along the potential plane of weakness.
