Analysis of the stress deformed state of rocks around the haulage roadway of the Beskempir field (Kazakhstan)

Begalinov, Abdrakhman; Almenov, Talgat; Zhanakova, Raissa; Bektur, Bakytbek

doi:10.33271/mining14.03.028

Cited by 20 publications

(14 citation statements)

References 12 publications

(9 reference statements)

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“…The above trends as a whole contribute to lowering the costs for maintaining the mine workings delineating the pillar, if there is a necessity for their further use according to the mining plan. This is confirmed by a number of studies [6][7][8][9].…”

Section: Introductionsupporting

confidence: 75%

Principles for certain geomechanics problems solution during overworking of mine workings

et al. 2021

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This paper deals with two relevant and interrelated directions of coal mining development. Firstly, the resource-saving complete extraction of reserves, and secondly, the intensification of mining activity through mining operations conducted on several seams. The objective of overworking of mine workings with a real representation of mining-and-geological and mining-engineering conditions has been formulated. Five peculiarities of the geomechanical models construction for overworking of mine works have been revealed and substantiated. The technology for performing a series of computational experiments is proposed. The task of the protecting pillar influence, which is located in overlying coal seam, on the state of mine working placed in the underlying coal seam has been solved. An optimal scheme for its maintenance is proposed.

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Section: Introductionsupporting

confidence: 75%

Principles for certain geomechanics problems solution during overworking of mine workings

et al. 2021

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“…Complexes of inclined and horizontal workings -ad its and spiral ramps -ensure efficient operation of self-propelled equipment and increase productivity of the mining enterprise. Experience shows that in most cases it is most efficient from the engineering and organizational points of view to drive horizontal and inclined transport transportation workings from the open pit side [47][48][49]. When determining the parameters of OT and OUT, the methods used for OPMO are applied [2][3][4] and technological features of determining parameters of mining operations in combined mining are also considered [53][54][55].…”

Section: Analysis Of Researches and Publicationsmentioning

confidence: 99%

Iron ore underground mining under the internal overburden dump at the PJSC “Northern GZK”

Pysmennyi

Chukharev²,

Kyelgyenbai³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Deterioration of mining conditions at mining deposits by open pit methods (increased mining depths, reduced ore deposit thickness) leads to an increase in mining costs. In Ukraine, to reduce open pit mining costs, overburden is disposed in temporary internal dumps located directly in the open pit over the ore reserves. Reactivation of pit areas with the temporary internal overburden dump located on them results in a surge of mining operations and deterioration of technical and economic indicators. Increased energy consumption, a decrease in working site parameters, an increase in angles of open pit slopes and stripping lags lead to unprofitability of open pit mining. One of the solutions to the mentioned scientific and engineering problem involves combined mining of deposits by integrated open pit and underground mining operations. The combined open pit-underground mining method enables reducing mining costs and enhancing technical and economic indicators. The suggested schemes for opening reserves located under the internal overburden dump enhance technical and economic indicators of deposit mining through making the internal dump a permanent one. This allows further disposal of overburden into internal dumps. Implementation of scientific recommendations and technological solutions resulted from the research performed (exemplified by the deposit Hannivske, Ukraine) reduces the cost of ore by 1.33 USD/t. At the same time, the total cost of building an underground mine makes 16.4 M USD, which is 30% less than when applying traditional opening vertical shaft schemes.

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“…The intensive development of open pit mining is accompanied by an increase in the volumes of overburden and the depth of mining. Along with an increase in the depth of mining, the risks associated with the loss of the rock mass stability incre ase [5].…”

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.

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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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Analysis of the stress deformed state of rocks around the haulage roadway of the Beskempir field (Kazakhstan)

Cited by 20 publications

References 12 publications

Principles for certain geomechanics problems solution during overworking of mine workings

Principles for certain geomechanics problems solution during overworking of mine workings

Iron ore underground mining under the internal overburden dump at the PJSC “Northern GZK”

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

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