Study and evaluation of the stability of underground mining method used in shallow-dip vein deposits hosted in poor quality rock

Ghazdali, O.; Moustadraf, Jalal; Tagma, Tarik; Alabjah, Bahija; Amraoui, Fouad

doi:10.33271/mining15.03.031

Cited by 13 publications

(10 citation statements)

References 21 publications

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“…An integral part of mining enterprises is the presence of a rock dump within the limits of the mine allotment, which is formed as a result of stockpiling the mine waste rocks from mining operations. Sustainable and efficient underground mining is achieved by selecting the optimal technological parameters of mining operations, which is impossible without taking into account the rock pressure impact [15,16]. With an increase in the depth of mining operations, the rock pressure increases, as a result of which the stability of the rock mass in underground mine workings decreases.…”

Section: Introductionmentioning

confidence: 99%

Influence of waste rock dump placement on the geomechanical state of underground mine workings

Petlovanyi

Sai

Malashkevych

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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This paper is devoted to assessing the influence of waste rock surface dumps on the geomechanical state of underground mine workings. The conditions of the Pivdenno-Bilozerskyi high-grade iron ore field are chosen as the research object. To study the influence of dump placement and the depth of mine working on the mass stress state on the contour of sublevel drifts, a numerical modeling methodology based on the SolidWorks software package has been developed. This methodology involves the substantiation of the elements and properties of the geomechanical model, as well as the calculation scheme. Polynomial patterns of changing stress value in the hanging wall drift sides have been determined in the depth intervals of 440–740 m depending on the distance of the dump to the geometric center of the stope chamber. It has been revealed that the degree of the waste rock dump influence on the stress state gradually decreases with depth. It has been found that the maximum degree of the waste rock dump influence is observed on the upper horizons. When the waste rock dump is located above the geometric center of the future stope chamber that the stress value on the contour of the hanging wall drift can increase up to 10% compared to the absence of a dump on the earth’s surface. The research results are important for designing stable parameters for supporting sublevel drifts in difficult conditions of occurrence of the hanging wall rocks.

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Section: Introductionmentioning

confidence: 99%

Influence of waste rock dump placement on the geomechanical state of underground mine workings

Petlovanyi

Sai

Malashkevych

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The authors have proposed selective mining of complex-structured ore deposits by a system with caving ore and overlying rocks [42][43][44][45][46][47]. The idea behind the option consists in mining the ore deposit in stages: I -extraction of ore reserves located between the hanging wall and the barren inclusion with its further drawing; II -drilling off the barren inclusion and moving it towards the hanging wall by blasting; III -breaking and drawing the remainder of ore on the footwall.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the rock mass quality in underground iron ore mining through application of resource-saving technologies

Pysmennyi

Fedko

Chukharev

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Annotation In terms of mining and geological structure, ore deposits are complex-structured and composed of single, parallel-contiguous ore bodies. The reserves of barren or ore inclusions with the useful component content less than the cut-off grade of the deposit on the whole make 5-12% for natural-rich ores, and 10-15% for natural-lean ores. Application of conventional systems to mining complex-structured ore deposit areas underground reduces the iron content in the mined ore mass by 3-6% in relation to the main content of the useful component in the ore deposit or increases ore losses 1.5-2.0 times of the standard ones. This leads to a decrease in efficiency of mining the reserves, and as a result, a loss of the world sales market. Application of the resource-saving technologies reduces ore losses and dilution in underground mining, thereby reducing the cost of ore mass processing. As compared with conventional systems, the proposed options of mining systems with ore caving enable increasing the average iron content in the mined ore mass by 2.37-7.03% without increased ore production costs. These indicators are confirmed by laboratory tests on models with natural materials, considering the scale of modeling.

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“…Various types of deposit geometrization are intended to solve mining problems both graphically and analytically. Determination of rock mass stability and its stress-strain state is quite an important problem solved with the help of geometrization methods [9]- [13]. Most of all, geometrization of geological forms and spatial distribution of rock mass characteristics relies upon information concerning subsoil arrangement of mining and geological indices.…”

Section: Introductionmentioning

confidence: 99%

Predictive geometrization of grade indices of an iron-ore deposit

Peremetchyk¹,

Kulikovskaya²,

Shvaher³

et al. 2022

Min. miner. depos.

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Purposeis development of the methods to predict indices of iron-ore deposits relying upon the improvement of available techniques as well as formulation of new geometrization procedures and identification of the most adequate decision-making way to assess geological data as the basis for geometrization and prediction. Methods are to develop a self-organizing prediction algorithm based upon combination of the available techniques and formulation of new mathematical methods; consider various means to assess them in the context of iron-ore deposit; and select the most efficient one. Use of geostatistical methods makes it possible to evaluate and process output geological information. The methods help assess mineral reserves of a mining enterprise. Findings. Dependencies of magnetite ore content upon geological factors have been derived in the context of an open pit of PIVDGZK JSC. The deposit has been geometrized; predictive mining and geometric model of the deposit site has been deve-loped. Factors have been determined influencing the distribution nature of the indices. Graphs to arrange grade indices of the deposit have been constructed. The graphs have helped predict their placement within the deposit. Originality. A method to predict mining and geological indices of iron-ore deposit has been developed relaying upon a self-organizing algorithm. Correlation between grade indices of minerals and different geological factors has been determined making it possible to describe spatial distribution of grade indices of the deposit. Practical implications. Geometrization methods for iron-ore deposits have been formulated. The methods help schedule mining operations accurately while improving their efficiency. The developed predictive self-organizing algorithm is the flexible tool used for various mining and geological conditions to provide scheduling and assessing of different mining methods. The self-organizing as well as geostatic evaluation techniques is quite a promising research tendency.

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Study and evaluation of the stability of underground mining method used in shallow-dip vein deposits hosted in poor quality rock

Cited by 13 publications

References 21 publications

Influence of waste rock dump placement on the geomechanical state of underground mine workings

Influence of waste rock dump placement on the geomechanical state of underground mine workings

Enhancement of the rock mass quality in underground iron ore mining through application of resource-saving technologies

Predictive geometrization of grade indices of an iron-ore deposit

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