Examination of the preliminary gravity dressing influence on the Shalkiya deposit complex ore

Motovilov, I. Yu.; Telkov, Sh. A.; Barmenshinova, M. B.; Nurmanova, Assel

doi:10.17580/nfm.2019.02.01

Cited by 6 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, centrifugal crushers are used to produce cube-shaped crushed stone with relatively low energy consumption. The destruction of the ore body rock containing the metal nuggets occurs without crushing metal inclusions [11]. Destruction in this case obviously occurs along the so-called reticular planes, characterized by the number of nodes (atoms, ions) of a flat lattice per unit of its plane (in accordance with the Bravais hypothesis).…”

mentioning

confidence: 81%

Substantiation of research results on energy efficiency of basalt crushing

Malanchuk¹,

Khrystyuk²,

Stets³

et al. 2022

Nauk. visn. nat. hirn. univ.

View full text Add to dashboard Cite

Purpose. To experimentally determine the main design and operational parameters of the influence of rock mass properties on the Roller Crusher performance when processing basalt rock mass. Methodology. The crushing and grinding of basalts are studied by the methods of mathematical statistics in order to identify the results obtained and determine the dependences of technological parameters on the mechanical impact factors. Experimental studies are carried out on the example of basalts from the Rafalivskyi quarry in the Rivne region. Findings. It has been revealed that the elemental composition of rocks in the benches of basalt quarries has a different mineral composition. Experimental studies of the rock crushing results have determined the efficiency of using screening for crushing basalts. The experimental dependences of the roller crusher performance in crushing and grinding modes on the properties of the rock mass have been obtained. Originality. The value of crushed rock fractal joints has been found, when using cone and centrifugal crushers, which is characterized by the shape factor and fractal dimension D. For cone crusher Kf=2.15.0 and D=1.4. For centrifugal crusher Kf=1.51.8 and D=1.17. These parameters testify to the energy feasibility of using centrifugal crushers. The high value of the multiple correlation coefficients R2 and Fisher criterion F, whose value at a significance level of 0.05 is higher than the critical one, indicates a sufficient convergence between the experimental and theoretical results and the accuracy of the obtained analytical dependences. Practical value. The generalized models for determining the Roller Crusher performance, obtained for each rock type, based on significant factors, greatly facilitate the choice of parameters for crushing and grinding processes, and also allow choosing a rational mode of crusher operation.

show abstract

mentioning

confidence: 81%

Substantiation of research results on energy efficiency of basalt crushing

Malanchuk¹,

Khrystyuk²,

Stets³

et al. 2022

Nauk. visn. nat. hirn. univ.

View full text Add to dashboard Cite

show abstract

“…The country's favorable geology and vast territory have allowed for extensive exploration and exploitation of its mineral wealth. This has led to the discovery of substantial deposits, many of which are considered world-class, attracting attention from major mining companies and investors seeking to capitalize on the potential of Kazakhstan's mineral resources [5]- [11].…”

Section: Introductionmentioning

confidence: 99%

Assessing a natural field of rock mass stress by means of in-situ measurements within Vostochnaya Sary-Oba deposit in Kazakhstan

Akpanbayeva,

Issabekv

2023

Min. miner. depos.

View full text Add to dashboard Cite

Purpose is to assess a natural field of rock mass stress within Vostochnaya Sary-Oba deposit using in-situ measurements. It will help identify stress distribution as well as high-stress areas that may be dangerous for mining operations. Methods. The research has applied a technique of well hydraulic fracturing to study parameters of the initial stress field within the deposit. For the purpose, two metering points in two measuring (horizontal and vertical) wells were used. Hydraulic fracturing has been tested at each installation location. Findings. The in-situ measurement results have helped obtain quantitative parameters of stress-strain state of the rock mass. It has been understood that the available tectonic disturbances may result from the shape of structural folds as well as from tectonic fissility. Operating azimuth of the maximum horizontal stress within the points coincides, it is equal to 70° ± 10. Originality is the use of a new approach to assess the stress rock mass state within Vostochnaya Sary-Oba deposit while applying in-situ measurements and well hydraulic fracturing. The abovementioned favours more accurate and reliable assessment of rock stress state at the field being quite important for mining safety and for the development of the efficient supporting procedures and ore extraction procedures. Practical implications. The research results are applicable to adapt project documents for the deposit mining, a supporting technique selection, and ore extracting. Moreover, they will help make the substantiated choice of a structure and geotechnical parameters taking into consideration safety of operations as well as quality of ore mining. In addition, the results help develop measures to prevent rock mass outburst and fall in mine workings.

show abstract

“…The non-traditional mining method of coal deposits opens new prospects in the development of coal seams with complicated mining and geological modes of occurrence. It combines extraction, dressing, and complex processing [33][34][35] with detailed study of rock mass behavior [36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of the Effect of Design and Technological Solutions on the Intensification of an Underground Coal Gasification Process

et al. 2021

View full text Add to dashboard Cite

This paper represents the results of experimental studies of physical modeling of the underground coal gasification process in terms of implementation of design and technological solutions aimed at intensification of a gasification process of thin coal seams. A series of experimental studies were performed in terms of a stand unit with the provided criteria of similarity to field conditions as well as kinetics of thermochemical processes occurring within a gas generator. Hard coal (high volatile bituminous coal) was selected as the raw material to be gasified, as that coal grade prevails in Ukrainian energy balance since it is represented by rather great reserves. Five blow types were tested during the research (air, air–steam, oxygen–steam, oxygen–enriched, and carbon dioxide and oxygen). As a result, the effect of tightness of a gas generator on the quantitative and qualitative parameters of coal gasification while varying the blow by reagents and changing the pressure in a reaction channel has been identified. Special attention was paid to the design solutions involving blow supply immediately into the combustion face of a gas generator. The experimental results demonstrate maximum efficiency of the applied gas generator design involving flexible pipelines and activator in the reaction channel and a blow direction onto the reaction channel face combined with blow stream reversing which will make it possible to improve caloricity of the generator gas up to 18% (i.e., from 8.4 to 12.8 MJ/m3 depending upon a blow type). Consideration of the obtained results of physical modelling can be used with sufficient accuracy to establish modern enterprises based on the underground coal seam gasification; this will help develop more efficiently the substandard coal reserves to generate heat energy as well as power-producing and chemical raw material. The research conclusions can provide technical reference for developing a new generation of underground coal gasification technology.

show abstract

Examination of the preliminary gravity dressing influence on the Shalkiya deposit complex ore

Cited by 6 publications

References 0 publications

Substantiation of research results on energy efficiency of basalt crushing

Substantiation of research results on energy efficiency of basalt crushing

Assessing a natural field of rock mass stress by means of in-situ measurements within Vostochnaya Sary-Oba deposit in Kazakhstan

Experimental Studies of the Effect of Design and Technological Solutions on the Intensification of an Underground Coal Gasification Process

Contact Info

Product

Resources

About