Determining the influence of the condition of rock-destroying tools on the rock cutting force

Івасів, Василь Михайлович; Yurych, Andriy; Zabolotnyi, Sergii; Yurych, L. R.; Bui, Vasyl; Ivasiv, Orest

doi:10.15587/1729-4061.2020.195355

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…The authors of [15] carried out experimental studies into the influence of the degree of wear of a single cutter on the change in the force and energy parameters of the rock cutting process. A significant influence of the degree of wear of the cutting elements on the growth of the force parameters of the process has been established.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Improving the technique for assessing the condition and predicting the wear of the rock destruction tool equipment

Grydzhuk

Dzhus

Yurych

et al. 2022

EEJET

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To ensure the trouble-free operation of the rock-destroying tool, the peculiarities of its interaction with the rock at different stages of work must be additionally studied. Still unexplored in full is the relationship between the state of the equipment of the rock-destroying tool and the oscillatory processes during the operation of the drilling tool. The basic dependences for determining the wear indicators of the equipment of the rock-destroying tool have been proposed. The scheme for implementing the method of assessing the condition and predicting the wear of equipment, taking into account the peculiarities of its interaction with the rock, has been improved. Underlying its implementation is the presence of a law of change of at least one generalized coordinate of an arbitrary cross-section of a drilling tool. Bench experimental studies were carried out, according to the results of which the dependence of the depth of the face deepening on the mode parameters of drilling and the geometry of the equipment was established. It was found that the wear of the cutter by 1 mm causes a decrease in the amplitude of longitudinal oscillations by an average of 1.4 times. The obtained functions of deepening the face were used to determine the energy indicators of the process of rock destruction. Given the peculiarities of the implementation of the experiment, the work and power of the axial load for the destruction of the rocks of the pit were used for such indicators. It should also be noted that the construction of numerical models is necessary for a complete assessment and prediction of the wear of rock-destructive tools. They should reflect the mechanical system and provide the ability to obtain the values of parameters that are not determined by the results of a laboratory experiment.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Improving the technique for assessing the condition and predicting the wear of the rock destruction tool equipment

Grydzhuk

Dzhus

Yurych

et al. 2022

EEJET

Self Cite

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“…Study [7] investigated the effect of the rotation speed of the rock-breaking tool on the cutting force of the rock. The ave rage values of the constituent forces were established, as well as the amount of work spent in the cutting process, and the amount of specific energy during the destruction of the rock.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Design of diamond drill heads with a hydrojet effect of rock destruction

Mendebaev

Smashov

2022

EEJET

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It follows from the analysis of materials related to the design and operation of drilling equipment that an important direction in the search for effective solutions appears to be the improvement of the structure of the working matrix of diamond drilling heads and the enhancement of their technological capabilities by using in their schemes physical effects that are unconventional in the field of well drilling technology. The tasks to be solved are to reduce the energy costs of the process of deepening wells, to obtain a structurally integral, informative core, and to ensure the stability of well walls. Following the concept, diamond drill heads with a separate system of washing channels and a hydrojet effect of rock destruction were designed and tested during the drilling of wells. The novelty of the structure of drill heads is the direction of the pressure flow of liquid to the steps of the bottom of the wells, repeating the shape of the matrix, the removal of sludge along the grooves and radial grooves, the treatment of the well wall. A special technology for the manufacture of diamond drill heads with a complex geometry of the matrix has been devised. The performance of diamond drill heads of various designs was tested under the industrial conditions of drilling wells for water and at polymetal deposits. It has been established that in terms of the quality of the tasks to be solved and technical and economic indicators, they have a significant advantage in comparison with standard equipment in terms of the mechanical speed of drilling wells, energy costs, and structural integrity of the core. The comparative states of the shape, the transverse size of the hydrogeological well, the purity of the treatment of the wall of the latter, drilled by diamond drill heads and standard equipment with ball bits, are indicative. The structural integrity of the core selected by the regular column set HQ in an assembly with drill heads with a hydrojet effect of rock destruction is ensured

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“…Metal matrix composites (MMCs) reinforced with diamond exhibit high hardness and grinding ability and are widely used in various applications like drills for concrete and rock cutting, mining, tunneling, oil exploration, hydrological and geotechnical drilling [1][2][3]. In MMCs, diamond segments usually are attached to the cutting and grinding tools, e.g.…”

Section: Introductionmentioning

confidence: 99%

Combined Effect of CrB<sub>2</sub> Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites

Ratov¹,

Мечник²,

Rucki³

et al. 2023

Adv. Sci. Technol. Res. J.

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The paper presents research results on the enhancement of diamond composites designed for tools application for mining industry, hard rocks cutting, able to withstand harsh conditions under heavy dynamical loads. In the present study, both CrB 2 micropowder and VN nanopowder additives were used in proportions up to 5 wt.% and 6 wt.%, respectively, together with the basic matrix composition of 51 wt.% Fe, 32 wt.% Cu, 9 wt.% Ni, and 8 wt.% Sn. Addition of both components, CrB 2 and VN, appeared to be advantageous in proportion of 2 wt.% and 4 wt.%, respectively. This composition exhibited the highest relative density of 0.9968, better than that without additives. Similarly, the highest values of compressive strength R cm and flexural strength R bm were reached for the composite with the same percentage of CrB 2 and VN. Compared to the composite with no addition of CrB 2 and VN, R cm improved by almost 70%, while R bm by 81%. Additionally, the abovementioned additives enhanced the ability of the matrix to prevent the diamond reinforcement from being torn out of the composite, which is very important under harsh working conditions of the cutting tools. The presence of CrB 2 micropowder and VN nanopowder promoted densification of the matrix and adhesion between the diamond grits and the Fe-Cu-Ni-Sn matrix.

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Determining the influence of the condition of rock-destroying tools on the rock cutting force

Cited by 5 publications

References 8 publications

Improving the technique for assessing the condition and predicting the wear of the rock destruction tool equipment

Improving the technique for assessing the condition and predicting the wear of the rock destruction tool equipment

Design of diamond drill heads with a hydrojet effect of rock destruction

Combined Effect of CrB<sub>2</sub> Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites

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