Authors: AndrosovA.D., ZarovniaevB.N., ShubinG.V., Budikina

Title of the article: Development of safe designs for nonmining flanks of deep quarries in conditions of cryolithozone

Year: 2018, Issue: 3, Pages: 13-21

Branch of knowledge: Earth sciences

Index UDK: 622.371:551.345

DOI: 10.26730/1999-4125-2018-3-13-21

Abstract: With an increase in the depth of diamond quarries (up to 300 ÷ 500 m and lower) and their service life, the importance of the conditions for long-term stability and safety of slopes of benches and berm of non-working sides increases to ensure safe mining conditions for the whole period of quarry exploitation. In the exploitation of deep open pits, rock slides and falls from the upper horizons of the disturbed areas are a significant hazard in mining operations, especially in places where superhigh ledges are set up, where the free fall of the broken pieces of rock is of the order of 60 to 100 m. Because of talus deposits filling the space and a small width of the safety berm between such ledges, this negative phenomenon carries a constant threat of injury to people and damage to machinery. Improvement in the design of the non-working side in the development of steeply dipping deposits by deep quarries is extremely important, because with the depth the conditions of mining equipment operation are sharply complicated impacting its performance. Therefore, in the research and design practice, several options are considered for arrangement of non-working sides, selecting the optimal one that ensures a stable standing of the side for the entire period of field operation. In the process of building and using the structures of these sides, which are built into the final position, an important task is to regularly monitor their stability throughout the life of the quarry. For deep quarries in the cryolithozone conditions, there are provided options of technical solutions for safety berms, which depending on their spatial location on the quarry side perform various functions, ensuring the safety, stability of its steep sides, reducing the amount of stripping work in the pit contour.

Key words: deep quarries cryolithozone ledge quarry side talus catching trench steeply inclined berm gravitational safety berm

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