Bolt support application peculiarities during support of development workings in weakly metamorphosed rocks

Lapko, V; Fomychov, V; Pochepov, Viktor

doi:10.1201/b16354-38

Cited by 19 publications

(6 citation statements)

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“…2. During the operation of water-bearing communications (gutters) and the lack of the proper surface drainage, it is possible to soak the loess loams, which will reduce the deformation, strength characteristics and subsidence of the base soils, and as a consequence, negative processes of the rock mass extrusion [27][28][29][30].…”

Section: Recommendations For the Obtained Data On The Stability Of The Dump Slopesmentioning

confidence: 99%

Determination of economically viable option of liquidation the consequences of external dump deformation

et al. 2021

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The safety factors for different variants of operation development were obtained, on the basis of which the technical and economic indicators were established and the most expedient way of restoration of dump operations in conditions of the formed landslide was chosen. The solutions were proposed for the external dump No 2 of the Central Ore Mining and Processing Enterprise (COMPE), that allow to continue its future operation. When working in the conditions of the formed landslide, three variants of the further dump operation are modeled: the first one - with landslide removal and unloading of the upper dump horizons, the second one - without landslide removal and involvement of disturbed lands in land allotment, the third one - with the landslide loading. Based on the built sections of the dump and defined physical and mechanical properties, the stability factors were obtained for different options of the operation development, which made it possible to determine the appropriate option to eliminate the effects of the dump slide deformations. As a result of the calculations, the cost flows for each of the proposed options of the formation of the end contour of the dump No 2 are determined.

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Section: Recommendations For the Obtained Data On The Stability Of The Dump Slopesmentioning

confidence: 99%

Determination of economically viable option of liquidation the consequences of external dump deformation

et al. 2021

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“…As an object of study, a mine field area of mine "Velykomostivska" of the Lviv-Volyn coal basin has been chosen, which is assigned to losses and is suggested by the authors for developing the underground gasification. The study of the stress state of rocks around the stope and preparatory mine workings at the traditional technology of coal mining in the Lviv-Volyn coal basin is described in the work [36]. However, during the underground coal gasification, the stress state of rocks containing wells was not studied.…”

Section: The Choice Of Object To Studymentioning

confidence: 99%

Predicting the producing well stability in the place of its curving at the underground coal seams gasification

et al. 2019

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The relevant issues have been studied of ensuring the stability of producing wells in the place of their curving when uncovering the mining extracted area for the underground gas generator operation. It is emphasized that the design planning of efficient operation of underground gas generators in downhole gasification technology is impossible without consideration of the stress state of the rock massif, which can lead to a danger of the wellbore cutting and emergency shutdown of the technological system operation. The parameters of geomechanical models have been developed and substantiated for the study of the stress state of the “rock massif – producing well” system under the conditions of the Lviv-Volyn coal basin. A computer simulation has been performed of change in the stress state of a laminal massif around a well with a curvature radius in the range of 5 – 25 m with the use of the finite element method. The exponential function has been revealed of the tensile stresses value in the roof of the seam from the angle of the producing well entry into the coal seam. It is recommended the rational angle of a well entry into the coal seam, which is in the range of 21 – 28 degrees, and an appropriate curvature radius will be 5 – 10 m.

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“…Mining production management needs solving a number of problems which can be divided into conceptual problems (i.e. strategic), technical and technological problems, and those connected with human factor (Vagonova & Volosheniuk, 2012;Gorova, Pavlychenko, Borysovs'ka, & Krups'ka, 2013;Khomenko, Kononenko, Myronova, & Sudakov, 2018).…”

Section: Introductionmentioning

confidence: 99%

Models and methods to make decisions while mining production scheduling

Khorolskyi¹,

Hrinov²,

Mamaikin³

et al. 2019

Min. miner. depos.

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Purpose is to develop a new approach to the design of mining operations basing upon models and methods of decision making.Methods. The paper has applied a complex approach involving approaches of decision-making theory. Analysis of the pro-duction development scenarios is proposed for strategic activity planning; criteria to make decisions under the uncertainty conditions as well as decision-making trees for day-to-day management are proposed to determine balanced production level.Findings. It has been identified that mining production design is of the determined character demonstrating changes in "state of the nature" depending upon the made decisions. The idea of mining production is to reduce uncertainty gradually by means of analysis of production scenarios, and elimination of unfavourable alternatives. Operative management is implemented while constructing decision trees, and optimizing operation parameters. Representation of sets of rational equipment types as well as development scenarios, and their comparison in terms of decision-making parameters makes it possible to determine adequate capacity of a working area, and to reduce expenditures connected with the equipment purchase and maintenance. In this context, limiting factors, effecting anticipatory mining out-put, are taken into consideration. Successive comparison of the alternatives helps identify decision-making area for different scenarios of the production development.Originality. To manage mining production, approaches of decision-making theory have been proposed which involve the use of decision trees, decision-making criteria, and analysis of scenarios basing upon representation of operating procedures in the form of a network model within which the shortest route corresponds to optimum decision. Practical implications. Decision-making system has been developed making it possible to optimize operation parameters, to reduce prime cost of mining, and to select a structure of engineering connections with the specified production level. The described approaches may be applied at the stage of a stope design as well as in the process of a field development. Specific attention has been paid to a software development to implement the approaches.

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Bolt support application peculiarities during support of development workings in weakly metamorphosed rocks

Cited by 19 publications

References 0 publications

Determination of economically viable option of liquidation the consequences of external dump deformation

Determination of economically viable option of liquidation the consequences of external dump deformation

Predicting the producing well stability in the place of its curving at the underground coal seams gasification

Models and methods to make decisions while mining production scheduling

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