Research into influence of drilling-and-blasting operations on the stability of the Kusmuryn open-pit sides in the Republic of Kazakhstan

Hussan, Bolatkhan; Takhanov, Daulet; Kuzmin, Sergey; Abdibaitov, Sharabidin

doi:10.33271/mining15.03.130

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…Lately, intensive studies have been conducted in the field of rock mass stability during mineral mining. In the course of studies, researchers developed different methods and techniques helping define rock mass stability and prevent probable risks connected with bench instability [47]- [49].…”

Section: Figure 1 Classification Of Factors Influencing Stability Of ...mentioning

confidence: 99%

Studying rock mass jointing to provide bench stability while Northern Katpar deposit developing in Kazakhstan

Tolovkhan¹,

Smagulova²,

Khuangan³

et al. 2023

Min. miner. depos.

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Purpose is to identify the basic joint systems, their characteristics, distribution within the rock mass, and determine impact of the joints on the bench stability. Methods. The risks of strain emergence in the form of blocks sliding along weakness surfaces within the local areas were determined based upon the definition of rock stability loss. The results of large-scale measurements of jointing were processed using circular and bar diagrams as well as stereographic grids. In the context of the paper, kinematic analysis was implemented through Dips Rocscience Inc. Software. Findings. Five basic joint systems have been identified; joints of 2nd and 5th systems are the most commonly encountered among them. The results of the jointing determination within the open pit boundaries have been represented as well as the open pit wall stability in terms of each site inclusive of consideration of potential strains along the sliding surface. Originality. For the first time, zoning of the open pit wall in terms of slide types has been performed. It has been identified that potential shear of a prismatic block is 33%; at the same time, 66% are bench destruction with the block toppling. The risk of wedge-shaped block shear is minimal. Practical implications. The research findings may be helpful to define and select both parameters and conditions of safe mineral extraction under the specific mining and geological conditions. In turn, the abovementioned will help reduce the risk of accidence while providing scientifically substantiated approach to select quarrying sequence, techniques, and system.

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Section: Figure 1 Classification Of Factors Influencing Stability Of ...mentioning

confidence: 99%

Studying rock mass jointing to provide bench stability while Northern Katpar deposit developing in Kazakhstan

Tolovkhan¹,

Smagulova²,

Khuangan³

et al. 2023

Min. miner. depos.

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“…An increase in the depth of surface mining usually leads to the pushing back of the open-pit walls and an increase in the volume of overburden [16], [17]. Another option for involving in mining of deep open-pit horizons without a significant increase in the cost of mining operations is to revise the ori-ginal project and increase the final angle of the wall inclination [18]- [20]. With this option, the problem arises of ensuring the stability of the open-pit wall and selecting parameters that are rational from the point of view of geomechanics of the newly projected ledges at deep horizons.…”

Section: Introductionmentioning

confidence: 99%

Substantiating the rock mass control parameters based on the geomechanical model of the Severny Katpar deposit, Kazakhstan

Tolovkhan¹,

Demin²,

Amanzholov³

et al. 2022

Min. miner. depos.

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Purpose. The research purpose is to develop a geomechanical model for ensuring the safety of mining operations by determining the optimal slope angles and probabilistic assessment of the stability of the open-pit walls. Methods. Three-dimensional geomechanical models for surface mining of deposits have been developed based on calculations of the stability factor (safety factor SF) of the open-pit walls in the Rocscience program to determine the rock mass stress-strain state at the end of mining using the finite element method. The geological wireframe model (GWM) has been built on the basis of the available geological sections, horizon plans and the results of the engineering-geological surveys using the Surpac geoinformation system. Findings. Strength reduction factor (SRF) has been determined taking into account the physical-mechanical properties of rocks that constitute the near-wall mass. An assessment of the stability of walls according to the selected geological sections is given, taking into account the projected contour of the Severny Katpar open-pit walls. The calculation of the projected contour stability of the open-pit walls by several different methods has revealed that the open-pit walls are generally stable. The open-pit parameters at the end of mining have been determined. Originality. For the first time, it has been determined that in the Southern and South-Western area of the Severny Katpar open-pit wall in the horizons +700…+400, there is a decrease in SF from 1.18 to 1.41 due to the predominant occurrence of siltstones and tectonic disturbances of the walls. Practical implications. The mathematical calculation results of the stability of the projected contour walls in the Severny Katpar open pit have been generalized. In addition, a geological and structural wire-frame model of the deposit has been developed, which makes it possible to ensure the safety of mining operations in the open pit.

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Assessing the quality of drilling-and-blasting operations at the open pit limiting contour

Khussan¹,

Lozynska²,

Takhanov³

et al. 2021

Nauk. visn. nat. hirn. univ.

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Purpose. To develop a methodology for assessing the quality of drilling-and-blasting operations when setting the side to the final position. In this regard, it is necessary to study the nature of deformations in the near-side masses of the design open-pit contours and to assess the seismic impact of blast waves in accordance with damage in the near and far zones from the open-pit boundary, as well as the level of generated seismic vibrations. Methodology.A methodology for assessing the quality of drilling-and-blasting operations at the limiting contour of open pits is developed using the analysis of the mining-and-geological conditions of the rocks constituting the field, in-situ surveying of the state of the open-pit sides, analysis of the physical-mechanical properties of the host rocks, analytical studies and instrumental measurements of the blasting effect. Findings.Based on the analytical methods, the calculation and analysis of the seismicity coefficient of the rocks at the field have been performed. By means of instrumental measurement of the blasting effect in open pit, data have been obtained on the seismic impact of blasting operations on the near-side mass. Based on the results of these works, a methodology for assessing drilling-and-blasting operations at the limiting contour of the open pit has been developed. Originality.In this work, to assess the blasting effect, the seismicity coefficient of the rock mass is used, which characterizes the degree of elastic response to external dynamic influence and is a parameter that determines the elastic seismic wave intensity with distance from the site of blasting operations. Based on the calculation, a map of the seismicity coefficient distribution in the open-pit area has been compiled. Using the method of instrumental measurements, which serves to determine the seismic impact of blasting on a rock mass, the degree of blasting effect on a near-side mass has been revealed. This made it possible to develop a method for assessing the blasting quality, based on determining the percentage of permissible deviations in the face drilling quality. Practical value.The results of the work will be used to calculate the safe parameters of conducting the blasting operations when setting the side to the final position. This method for assessing the quality of drilling-and-blasting operations can be applied at any mining enterprise conducting open-cut mining of minerals.

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Research into influence of drilling-and-blasting operations on the stability of the Kusmuryn open-pit sides in the Republic of Kazakhstan

Cited by 4 publications

References 12 publications

Studying rock mass jointing to provide bench stability while Northern Katpar deposit developing in Kazakhstan

Studying rock mass jointing to provide bench stability while Northern Katpar deposit developing in Kazakhstan

Substantiating the rock mass control parameters based on the geomechanical model of the Severny Katpar deposit, Kazakhstan

Assessing the quality of drilling-and-blasting operations at the open pit limiting contour

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