Physical modelling of blasting in high-grade quartz mining

Sokolov, I. V.; Smirnov, A. A.; Antipin, Yu. G.; Rozhkov, A. A.

doi:10.18503/1995-2732-2017-15-1-4-9

Cited by 2 publications

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“…45 quartz-cement and 1 quartz sample were blasted. The influence of the method of explosion on the character of destruction in the near zone of explosion was determined from the sample n=46 [9].…”

Section: Resultsmentioning

confidence: 99%

Development of explosive breaking principles for the ores prone to overgrinding

et al. 2020

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In underground mining of valuable non-metallic raw materials, non-ferrous and precious metal ores, the problem of overgrinding of raw materials as a result of blasting operations is quite acute. For ores of nonferrous and precious metals, represented by strong rocks, the effect of increased concentration of ore minerals in small classes of ore is characteristic. Due to the process of segregation of the mass in ore drawing, small fractions accumulate in significant quantities on the lying side of the mine goaf and on the roughness of its surface. Such ore is often simply lost. It is rational to create conditions for reducing the yield of small fractions already at the stage of separating the ore from the array. Therefore, the development of technological methods for managing the quality of mining enterprise products and methods for improving the completeness of extracting mineral reserves is an urgent scientific and technical task. To solve this problem, a number of model and full-scale experiments were conducted to identify the dependence of the nature of destruction on the method and parameters of blasting, followed by statistical evaluation of the results. The principles of determining the parameters of the technology for breaking valuable ores that are prone to overgrinding are established.

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Section: Resultsmentioning

confidence: 99%

Development of explosive breaking principles for the ores prone to overgrinding

et al. 2020

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Application of resource-saving principles at breaking of strong fractured ores by blasthole ring charges

Smirnov

Baranovskiy

Rozhkov

2020

Gorn. inf.-anal. bull.

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During underground mining of deposits of valuable non-metallic raw materials, nonferrous and precious metal ores, the problem of their overgrinding as a result of blasting is quite acute. Overgrinding of valuable non-metallic raw materials leads to an actual decrease in the yield of concentrates or final products, due to the rather stringent requirements of the enrichment technology for the conditional size of the piece and the structural safety of the useful component. Non-ferrous and precious metal ores represented by strong rocks are characterized by the effect of increased concentration of ore minerals in small classes of ore. Due to the process of segregation on ore drawing, small fractions in significant quantities accumulate on the lying side of the goaf and its unevenness. Such ore with a high content of useful component requires additional technological measures for its extraction or is simply lost. Consequently, the development of technological methods for managing the quality of products of a mining enterprise and methods for increasing the completeness of extracting mineral resources are an urgent scientific and technical task. To solve it, an analysis of theory and practice in the study area was carried out, which showed that the existing methods for additional extraction of fine ore fractions in mining systems with an open goaf are laborintensive and resource-intensive, not universal, ineffective and often not safe. It is rational to create conditions for reducing the yield of fine fractions already at the stage of ore blasting As a result, determining parameters principles for breaking technology of strong fractured ores are proposed. Developed guidelines and recommendations for blasthole ring charges. Dependences the technical and economic indicators of ore explosive blasting from its structural and technological parameters are obtained.

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Physical modelling of blasting in high-grade quartz mining

Cited by 2 publications

References 0 publications

Development of explosive breaking principles for the ores prone to overgrinding

Development of explosive breaking principles for the ores prone to overgrinding

Application of resource-saving principles at breaking of strong fractured ores by blasthole ring charges

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