The new method of calculation of the granulometre composition of exploded rocks

Rakishev, B.R.; Rakisheva, Zaure

doi:10.1201/9781003078166-106

Cited by 1 publication

(6 citation statements)

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Section: Methodsmentioning

confidence: 99%

“…where h 3charge height above the level of the bottom of the bench, m; k 1coefficient taking into account the fraction of the destroyed volume due to the reflected tensile wave, k 2coefficient taking into account the fraction of the destroyed volume due to the intumescent action of the explosion. Based on the literature data (Repin 1978;Rakishev and Rakisheva 2007), their sum (k 1 + k 2 = k) can be taken to be equal to 1, i.e. k = 1.…”

Section: Methodsmentioning

confidence: 99%

“…The authors (Hanukaev 1974; Rakishev and Rakisheva 2007; Rakishev 2016) showed that the maximum radius of the explosive cavity is an integral characteristic of the effect of an explosion in a solid medium and the relative maximum radius of the explosive cavity is determined by the formula: where – the initial pressure of the detonation products of explosives, MPa; – strength characteristic of the rock under explosive loading, MPa.…”

Section: Methodsmentioning

confidence: 99%

“…Some part of the rockmass is destroyed due to reflected stress waves. This stage of the explosion is short-lived, but during this time most of the explosive energy is consumed, the main destruction of the rock mass is realized (Pokrovsky and Fedorov 1957; Kutuzov 2007; Rakishev and Rakisheva 2007; Viktorov et al 2014; Rakishev 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The key characteristics of the destruction of rocks by the explosive detonation process are: the maximum radius of the explosive cavity, the size of the zones of intense crushing and the volume of the entire fragmented mass. They form the granulometric composition of blasted rocks and depend on a different combination of physicomechanical properties of the rocks mass, chemical and physical characteristics of the explosives used, and charge arrangement parameters in the blasted mass (Hanukaev 1974; Rakishev and Rakisheva 2007; Rakishev 2016).…”

Section: Introductionmentioning

confidence: 99%

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Digital hierarchical model of lumpiness of blasted rock mass

et al. 2020

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The article describes the developed new digital hierarchical model of lumpiness of blasted rocks. It is based on a combination of classes of pieces of rock by size, taken as hierarchical levels of lumpiness of rocks, and the percentage of pieces in classes, adopted for its numerical characteristics. 7 classes of rocks by size are considered, each of which is characterized by the content of its pieces. The key component of the proposed model -the granulometric composition of the blasted rocks is determined by the block mass of the rocks, the size of the zones of intense crushing, the volume of crushed rocks due to the action of stress waves and reflected waves (I stage of explosion), detonation products (swelling effect of the explosion) (II stage of explosion), and collisions of large pieces when moving (III stage of explosion). The regularities of the formation of these explosion results are established depending on the different combination of the physicomechanical properties of the rocks of the massif, the chemophysical characteristics of the explosive used, the parameters of the explosives and the explosive method.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%