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Preliminary assessment of roadheaders efficiency based on empirical methods and index of equivalent rock strength
(National Mining University, 2019-09-30)
Purpose. The choice of a proper roadheader is a critically important step in planning of a project or some of its stages. Nowadays various manufacturers produce numerous models of these vehicles, hence it is unreasonable ...
Economic criteria for optimizing the number and load factor of mining transformers
(National Mining University, 2019-06-30)
Purpose. This article discusses how to choose the optimal number and load factor, respectively the economic power in the first year of mining power transformers operation. The analysis is carried out based on technical-economic ...
Laboratory studies of a high-strength roof bolting by means of self-extending mixtures
(National Mining University, 2019-06-30)
Purpose is to analyze parameters of a new method to fasten roof bolts with the help of nonadhesive mixtures extending while hardening along with the development of high expansion pressures.
Methods. The research, concerning ...
Use of thermal and magnetic devices for prevention of asphaltene, resin, and wax deposits on oil equipment surfaces
(National Mining University, 2019-06-30)
Purpose. To substantiate the advantages of using a multi-level externally insulated complex of magneto-thermal dewaxing which is located in the oil well and improves production of the formation fluid with high content of ...
Predicting remaining lifetime of drill pipes basing upon the fatigue crack kinetics within a pre-critical period
(National Mining University, 2019-09-30)
Purpose is to determine regularities of the development of corrosive fatigue cracks in terms of high-strength drill pipes.
Methods. Basing upon the approaches of the material failure mechanics, the crack has been characterized ...
Distribution of mineral extraction revenue: overview of international practice
(National Mining University, 2019-06-30)
Purpose. To study basic principles and conditions of the efficiency of the system to redistribute mineral extraction revenue including the countries with lower levels of welfare.
Methods. The research applies a method of ...
Energy-saving intensification of gas-condensate field production in the east of Ukraine using foaming reagents
(National Mining University, 2019-06-30)
Purpose. Development of recommendations on the use of foaming surfactants (FSs) in the overall task of increasing energy and resource conservation of wells at the final stages of the development of gas condensate fields ...
Digital system of quarry management as a SAAS solution: mineral deposit module
(National Mining University, 2019-06-30)
Purpose. Improving the efficiency of functioning the mining enterprises and aggregation of earlier obtained results into a unified digital system of designing and operative management by quarry operation.
Methods. Both ...
Study of numerical simulation method modelling gas injection into fractured reservoirs
(National Mining University, 2019-06-30)
Purpose. Fractures are the main flow channels in fractured reservoirs. The rapid flow characteristics of gas are outstanding in fractures. It is a major technical problem in the current oilfield development to calculate ...
Resonance in rock mass as the key reason of geodynamic phenomena
(National Mining University, 2019-06-30)
Purpose is to develop deformation criterion or predecessors of geodynamic phenomena within rock mass relying upon the systemized experimental data concerning rock behaviour in a volumetric field of compressive stress.
Methods. ...