Formulation of methods reducing landslide phenomena and the collapse of career slopes during open-pit mining

Begalinov, Abdrakhman; Хомяков, В.А.; Serdaliyev, Yerdulla; Iskakov, Yerkin; Zhanbolatov, Aibar

doi:10.1051/e3sconf/202016800006

Cited by 5 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…it is still not possible to achieve acceptable rates of gold recovery from raw materials. At the same time, all the mentioned methods do not ultimately exclude the environmental hazard of the process resulting from the use of a cyanide reagent at the final stage of the technology [7]- [10].…”

Section: Introductionmentioning

confidence: 99%

Leaching process intensification of gold-bearing raw materials

Begalinov¹,

Shautenov²,

Almenov³

et al. 2022

Min. miner. depos.

Self Cite

View full text Add to dashboard Cite

Purpose. Research on the process intensification of gold-bearing product hydrometallurgical processing based on mechanochemical milling of the initial sulphide material. Methods. Mechanochemical activating (oxidation) of sulphide gold-bearing concentrate under conditions of superfine milling, sulphite-thiosulphate leaching of the milled product after liquid phase separation. The float concentrate sample with a particle size of -0.074 mm, the Au content is 15.5 g/t is tested. When loading into the mill of an initial concentrate sample weighing 300 g, 600 ml of a calcium hydroxide solution with a concentration of 143 g/l are added. The weight of balls loaded into the mill in relation to the concentrate weight is 10:1. The remainder of the solid product after milling is subjected to lea-ching with a sulphite-thiosulphate reagent. Findings. A sharp increase in the milled product of 10 µm fractions (from 14.05 to 34.63%) has been determined, and the mass fraction of gold in the final milling product decreases from 15.5 to 13.0 g/t. This corresponds to the recovery of gold into solution at this stage at the level of 16%. It has been found that with an additional supply of 1 g/l of copper sulphate for copper in the process of milling, it is possible to reduce the gold content in the milled product to 8.3 g/t. Thus, the recovery of gold into solution at the stage of milling increases from 16 to 48%. During the milling process, partial leaching of gold by reagents formed from its own sulphur has been revealed. It has been found that the transition of gold into solution is caused by the formation of a water-soluble hydrosulphide complex of gold during milling (AuS). As a result of leaching with the reagent, an additional 27% of gold has been recovered. Originality. Phase transformations of the sulphide gold-bearing beneficiary product as a result of mechanochemical activation have been determined. For the first time this process has been implemented to intensify the leaching process of gold-bearing mineral raw materials. Practical implications. The research results can be used in technological processes for the processing of refractory gold-bearing ores and technogenic raw materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Leaching process intensification of gold-bearing raw materials

Begalinov¹,

Shautenov²,

Almenov³

et al. 2022

Min. miner. depos.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The modern stage of development of mining deposits is characterized by the complication of mining-andgeological conditions [1,2] with a simultaneous increase in requirements to reduce the negative impact on the environmen t [3]. The issues of reducing landslide phenomena in mining areas are especially acu te [4]. The intensive development of open pit mining is accompanied by an increase in the volumes of overburden and the depth of mining.…”

Section: Introductionmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

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.

show abstract

“…Unsolved aspects of the problem. Stope dimensions are subject to its mining period [5], physicomechanical characteristics of the mineral [6] and waste rocks [7], methods to support the mined-out area [8], as well as mining and geological conditions of the rock mass occurrence [9]. The parameters identify geometry of a preventer mounted in the neighbourhood of the stope collar.…”

mentioning

confidence: 99%

Simulation of amber extraction processes from sandy and clay rocks with stope filling

Moshynskyi¹,

Korniyenko²,

Malanchuk³

et al. 2021

Nauk. visn. nat. hirn. univ.

View full text Add to dashboard Cite

Purpose. To develop a mathematical model for a system of amber extraction based upon physical cumulation and deflation effects under the conditions of turbulent flows. Methodology. Theoretical simulation of the extraction processes took into consideration use of a basic aggregate, converting processes, compounding processes, modification processes, aggregating processes, processes of rotation series development involving practices of design and operation of the available similar facilities, design solutions, and widespread unification of both components and assembly units. Analysis of the gained theoretical and practical experiences helped simulate processes of amber extraction from sandy and clay rocks with stope filling. Findings. Rock mass loosening by means of hydromonitor jets, operating tangentially in a casing while developing swirling pulp flows, has been simulated mathematically. A procedure to prepare filling material from mine tailing by means of a preparator, located within a settling pond, has been substantiated. The research, concerning mineral disintegration, has helped identify that the average value of the maximum deflector radius, shaped as a result of counter jetting action, is Rmax = 0.30.5 m; at the same time, the average value of the maximum radius of a hole, shaped resulting from helical jetting action around suction pipe, is Rmax = 0.3m. Originality. For the first time, a mathematical model to use cumulation and deflation effects for a mineral disintegration has been developed as well as for preparation of filling material from mine tailing. The model reflects twists of helical 6585 jetting action with the maximum 0.5 m deflector radius and development of turbulence improving stope filling efficiency. Practical value. The proposed procedure is the theoretical background to develop automated system of amber extraction from sandy and clay rocks, which will improve productive capacity of the mining process substantially.

show abstract

Formulation of methods reducing landslide phenomena and the collapse of career slopes during open-pit mining

Cited by 5 publications

References 0 publications

Leaching process intensification of gold-bearing raw materials

Leaching process intensification of gold-bearing raw materials

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

Simulation of amber extraction processes from sandy and clay rocks with stope filling

Contact Info

Product

Resources

About