Calculation of optimal parameters for drill-and-blast operation chart in mining with direct slot stage cutting

Андриевский, А. П.

doi:10.1007/bf00711129

Cited by 2 publications

(2 citation statements)

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“…Owe and O [21] employed grey relative analysis to analyze the effects of the parameters like hole depth, dip angles, and hole spacing on the V-cut blasting charged at the bottom. Andrievskii [22] optimized the parameters for drill-and-blast operation chart in mining with direct slot stage cutting. In addition, Qiao et al [23,24] research on optimization algorithms, wave transformation, and hybrid model prediction of improved deep learning, Lou et al [25,26] research on impact pressure on blasthole wall with radial air-decked charge, and so on obviously have better parameter value for blasting parameter optimization.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Numerical Research on V‐Cut Parameters and Auxiliary Cuthole Criterion in Tunnelling

Lou

Bao

et al. 2020

Advances in Materials Science and Engineering

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This paper aims at providing a sound theoretical solution to auxiliary central hole and the cutting parameters. For this purpose, the forming mechanism of V-cut cavity for cutting blasting was performed based on the hypothetical rock breaking mechanism of V-cut blasting. A theoretical solution for increasing the critical depth of the auxiliary center cuthole and the criteria for increasing the cuthole diameter of various types of cutholes when the rock attributes, explosive properties, and cuthole dip angle are constant are proposed. (1) If charging length le < 0.75H/sin θ, no auxiliary cuthole is needed. (2) If 0.75H/sin θ < le < 0.75H/sin θ + (2∼4) × 0.1, a central vertical auxiliary hole is needed. (3) If 0.75H/sin θ + (2∼4) × 0.1 < le < 0.75(H/sin θ + Hi/sin θi), a shallow inclined hole is needed. (4) If le > 0.75(H/sin θ + Hi/sin θi), both the central vertical cuthole and the shallow inclined cuthole are needed. Meanwhile, the theoretical solution was verified by numerical modelling with ANSYS/LS-DYNA. Moreover, the field implementation of the V-cut and the auxiliary hole effectively improved the blasting effect in both efficiency and economy.

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Section: Introductionmentioning

confidence: 99%

Theoretical and Numerical Research on V‐Cut Parameters and Auxiliary Cuthole Criterion in Tunnelling

Lou

Bao

et al. 2020

Advances in Materials Science and Engineering

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“…Головною умовою високої ефективності проведення гірничих виробок є правильний добір комплекту шпурів, що забезпечую максимальний коефіцієнт їх використання та впливає на швидкість проведення виробки. Параметри БПР, такі, як тип врубу [19], схема розташування та кількість шпурів, тип ВР і величина заряду залежать від конкретних гірничо-геологічних умов. У сучасній практиці при підземному видобуванні руд широкого використання набули вруби, що класифікуються за розташуванням врубових шпурів відносно площини вибою на похилі вруби (відривної дії) та прямі вруби (подрібнювальної дії).…”

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New method for determining parameters of drilling and blasting for horizontal and inclined mine workings

Kononenko,

Khomenko,

Kosenko

2023

Coll. res. pap. nat. min. univ.

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Purpose. Development of a new methodology for calculating the parameters of drilling and blasting (D&B) for horizontal and inclined mine workings, taking into account the pressure of the explosion products, the compressive strength of rocks, their structural structure, fracturing and compaction under the action of rock pressure. The methodology of research. Using the well-known laws of the theory of elasticity and the main provisions of the quasi-static-wave hypothesis of the mechanism of destruction of a solid medium by an explosion, a method has been developed for determining the D&B parameters for excavating, which is based on the principle of placing groups of blast-holes in the areas they occupy in the working face and their location behind outside the fender circuits. To establish the suitability of the developed new methodology for calculating the parameters of the D&B, it was tested in the conditions of a real object. Findings. A methodology has been developed for calculating the parameters of the D&B in the excavating, which is based on the principle of placing groups of blast-holes in the areas they occupy in the working face and their location behind outside the fender circuits. The first stage of the methodology includes the calculation and design of straight cuts, the distance between the blast-holes in which is determined by the radius of the crush zone. The second stage of the methodology includes the calculation of: specific and total costs of explosive (EX) per slaughter, the value of the line of least resistance (LLR) for the blast-hole along the radius of the zone of intensive grinding, the areas of groups of holes, the number of blast-holes, the calculated and actual distance between the blast-holes, the actual value of the charge per blast-hole, actual specific and total costs of EX for working face. Approbation of the developed methodology was carried out in the conditions of an operating ore mine during excavating using a bulk emulsion explosive (EЕ) Ukrainit-PP-2, for which the D&B parameters were calculated according to the developed method. On the basis of test blasts, good results were obtained for blasting the bottom of the working, uniform ore crushing and a high utilization rate of blast-holes. The originality. The parameters of the location of blast-holes in the working face are implemented according to the power-law pattern of change in the LLR depending on the diameter of the blast-hole, the pressure of the explosion products, the compressive strength of the rocks, their structural structure, fracturing and compaction under the action of rock pressure. Practical implications. The developed method for determining the D&B parameters for horizontal and inclined mine workings makes it possible to rationalize the uniform arrangement of blast-holes in the working face and to save resources when performing drivage up to 18%.

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Calculation of optimal parameters for drill-and-blast operation chart in mining with direct slot stage cutting

Cited by 2 publications

References 1 publication

Theoretical and Numerical Research on V‐Cut Parameters and Auxiliary Cuthole Criterion in Tunnelling

Theoretical and Numerical Research on V‐Cut Parameters and Auxiliary Cuthole Criterion in Tunnelling

New method for determining parameters of drilling and blasting for horizontal and inclined mine workings

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