Theoretical Calculation of the Optimal Distance between Parallel-close Charges in the Explosion of High Ledges

The article considers the dependences of determining the parameters of the destruction zones of the rock mass by explosive charges, proposed by V.N. Mosints, N.P. Gorbachev, M.F. Drukovanny, V.N. Tyupin, B.N. Kutuzov and A.P. Andrievsky and others. The above dependences allow determining the location of the boreholes in the face, taking into account the physical and mechanical characteristics of the massif being destroyed, the features of the explosive used, the variety of mining, geological and mining technical conditions for driving mine workings, as well as performing the calculation of rational parameters under conditions of increased rock pressure.

“…Mosinets and N.P. Gorbachev were among the first who proposed formulas for determining the destruction zones [1][2][3][4][5][6][7][8][9]. Collapse zone radius:…”

Section: Resultsmentioning

confidence: 99%

Methods for calculating the parameters of drilling and blasting operations based on the primary determination of the zones of destruction of the rock mass

Оchilov,

Маkhmudоv,

Nizamova

et al. 2024

“…Fluctuations in the output of the 5-40 mm fraction do exceed 4%. This pattern takes place both in the explosion of continuous explosive charges and in the explosion of explosive charges with longitudinal channels [3][4][5][6][7][8].…”

Section: Fig 4 Graph Of the Change In Particle Size Distribution Duri...mentioning

confidence: 99%

Investigation of the Process of Destruction of a Roain Massif by Borehole Charges with an Axial Air Cavity by the Method of Physical Simulation

Zairov,

Urinov,

Ochilov

et al. 2024

the design of downhole explosive charges with an axial air cavity was developed, which ensures uniform crushing of the rock mass and reduces the specific consumption of explosives. A technique has been developed for modeling the process of destruction of a rock mass by borehole charges with an axial air cavity. It has been established that with an increase in the diameter of the axial cavity, the mass of the charge and the specific consumption of explosives for breaking decrease. However, this decrease occurs only up to a certain limit, after which the volume of the chipped mass decreases and the specific consumption of explosives increases. The most efficient way is to reduce the specific consumption of explosives for breaking when the ratio of cavity diameters and charge diameters is 1.3:5–2.2:5. For other values of the ratio, the specific consumption of explosives increases dramatically.

“…The main task of drilling and blasting in rock quarries of complex structure deposits is to ensure the highest technical and economic efficiency of technological processes of excavation and transportation of blasted rock mass. In recent years, from the standpoint of the ultimate goal of mining, explosive crushing of ore is considered not only as a process of preparing rocks for excavation and loading operations, but also as the initial stage of the ore processing process, preceding mechanical crushing and grinding, that is, explosive destruction is one of the stages of disintegration along with coarse and medium mechanical crushing and is included in the mining technology [1][2][3][4][5][6][7][8]. Explosive breaking, crushing and grinding are elements of a single process for preparing the ore mass, called ore preparation.…”

Section: Introductionmentioning

confidence: 99%

Justification of the Value of Well Drilling During Explosion of Leads

Umarov,

Nasirov,

Makhmudov

et al. 2024

The article considers the influence of the strength of rocks, the type of explosive height, the diameter and length of the charge in the drilling of wells on the quality of crushing rocks. It has been established that about 50% or more of the length of the drilled well is used irrationally, and only 50% is used for its intended purpose for destroying the explosive charge in order to destroy the massif by explosion. To determine the effect of the distance between the charges on the value of the resistance overcome along the sole, industrial experiments were carried out at the quarries of the NMMC and AGMK.