Research into stress-strain state of the mass under open pit with a change in the open-pit bottom width

Imashev, Askar; Suimbayeva, Aigerim; Zhunusbekova, Gaukhar; Zeitinova, Sholpan; Kuttybayev, Aidar; Mussin, Aibek

doi:10.33271/mining16.03.061

Cited by 8 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The specifics of field testing and development by these methods is to conduct excavation chambers without fastening. Continuous extraction of chambers followed by collapse is rational [18,19]. In the process of excavation, an unloading zone is formed in the roof of the chambers, which perceives only the mass of the roof directly, the pressure of which is mainly transmitted to adjacent massifs and collapsed rocks of the produced space [19][20][21].…”

Section: Development Of a Methodology For Calculating The Parameters ...mentioning

confidence: 99%

Study of hydroerosion process parameters of zeolite-smectite tuffs and underlying rock

Malanchuk,

Ya Korniyenko,

Zaiets

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The paper considers the expediency of complex processing of zeolite-smectite tuffs using the method of borehole hydro-mining. The basic information about deposits of zeolite-smectite tuffs in the Rivne-Volyn region of Ukraine and the main areas of their application in industry are presented. Also, the method of calculating the parameters of the process of hydraulic erosion of tuffs and underlying rocks by the method of borehole hydro-mining is given, and the dependence of the specific consumption of the working agent during erosion of tuffs and underlying rocks on the diameter of the nozzle at variable pressure is presented. The dependences for determining the rational forms of recess chambers with the specified erosion radius are given.

show abstract

Section: Development Of a Methodology For Calculating The Parameters ...mentioning

confidence: 99%

Study of hydroerosion process parameters of zeolite-smectite tuffs and underlying rock

Malanchuk,

Ya Korniyenko,

Zaiets

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Most studies aimed at establishing the impact of open-pit productivity on the economic indicators of development, the existing relationship between the development of mining and mining operations in a open-pit [25][26][27], is considered only on the basis of the condition that a change in the angle of slope of the working side of the open-pit [28] leads to a change in the current stripping ratios [29][30][31]. This does not take into account the need to ensure the standard volume of reserves ready for extraction [32][33][34].…”

Section: Object and Methods Of Researchmentioning

confidence: 99%

Study of the impact of the open pit productivity on the economic indicators of mining development

Hryhoriev,

Lutsenko,

Kuttybayev

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The article studied the issue of improving the scientific and methodological base in the field of design and planning of open-pit mining by developing new and adjusting existing methods for determining the ore productivity of an open-pit, which should take into account the interconnection between the mining schedule and the productivity of an open-pit for ore, based on the condition for ensuring the standard volume of finished to the extraction of reserves. When choosing the production of an open-pit for ore, it is necessary to take into account the impact of the interconnection between the schedule of mining and production, based on the conditions of regulatory regulation of the volume of mining for the excavation of reserves, on the cost of ore mining and concentrate production. With an increase in ore productivity, the cost of ore mining, as well as the cost of production of concentrate reduction. At the same time, the very possible productivity of the open-pit for especially minerals is achieved, the economic efficiency of the development of deposits is achieved with the chosen direction of the open-pit. A decrease in productivity for a common mineral by 20 and 40% entails a decrease in profit from the development of the deposit by 10 and 20%, respectively. It has been determined that an increase in the slope angle of the working side of the open-pit significantly reduces the economic efficiency of the development of the deposit due to the fact that the operation of the open -pit with a large slope angle entails not only a decrease in the current stripping ratios as a result of an improvement in the mining schedule, but also a decrease in ore productivity, which reduces the present value of marketable products due to an increase in the period of development of the deposit. The results of the studies performed can be used by design organizations and mining enterprises in determining the ore productivity of an open-pit.

show abstract

“…If to take into account the nonuniform distribution of horizontal and vertical stresses, it is possible to improve the safety of conducting mining operations and increase the reliability of the results obtained by numerical analysis methods based on rock mass modeling using highprecision programs [50].…”

Section: Figure 1 Cable Fastening Test Area Figure 2 View Of An Area ...mentioning

confidence: 99%

Reduction of ore dilution when mining low-thickness ore bodies by means of artificial maintenance of the mined-out area

Mussin¹,

Imashev²,

Matayev³

et al. 2023

Min. miner. depos.

View full text Add to dashboard Cite

Purpose. The research purpose is to study the effectiveness of artificial maintenance of the mined-out space based on the use of cable bolts to reduce the dilution coefficient when mining low-thickness ore bodies. Methods. Geotechnical mapping of the rock mass according to the Q, RMR, RQD and GSI rating classifications is conducted, as well as a linear survey of the fracture system in the hanging wall and footwall rocks is performed using a rock compass and the GEO ID application. Numerical analysis by the limit equilibrium method in the Unwedge software package is applied to determine the safety factor of a mass divided by fractures into wedges. Using a Schmidt test hammer, the uniaxial compressive strength of the mass rocks has been determined. The full-scale studies have been conducted using cable support in the conditions of the Akbakai deposit. Findings. It has been revealed that the footwall rocks are in a stable state, while the safety factor of the hanging wall rocks is 0.98, which requires artificial maintenance using cable bolts. The cable support parameters are calculated taking into account nonuniform distribution of horizontal and vertical stresses in the rock mass. It has been determined that when strengthening the hanging wall with cable bolts in inclined veins with a dip angle of up to 40º, the average ore dilution is 66.1%, and that of previously mined without fastening is 68.7%. In similar experiments in steep-dipping veins with a dip angle of more than 60º, dilution decreases from 62.8 to 48.7%. Originality. It has been revealed that in the conditions of the Akbakai deposit, cable fastening of the hanging wall rocks is effective at an ore deposit dip angle of more than 60º, at which the mined ore dilution coefficient decreases. Practical implications. The research results can be used to increase the stability of hanging wall rocks when mining low-thickness ore bodies with a sublevel caving system.

show abstract

Research into stress-strain state of the mass under open pit with a change in the open-pit bottom width

Cited by 8 publications

References 13 publications

Study of hydroerosion process parameters of zeolite-smectite tuffs and underlying rock

Study of hydroerosion process parameters of zeolite-smectite tuffs and underlying rock

Study of the impact of the open pit productivity on the economic indicators of mining development

Reduction of ore dilution when mining low-thickness ore bodies by means of artificial maintenance of the mined-out area

Contact Info

Product

Resources

About