Leonid Novikov

M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine · Department of Geomechanics of Mineral Opencast Mining Technology

Blasting operations conducted in quarries affect the surrounding landscape. The paper proposes improvements to the scheme of conducting blasting operations in one of the Ingulets quarries, where the main problem of deposit development lies in the possibility of water breakthrough from the Ingulets River through natural fissures into neighboring qua...

Purpose. To determine the patterns of changes in the gas mixture parameters in the final gas-drainage pipeline section during draining-out of gases from the mined-out space through the gas pipeline branches with impaired throughput capacity. Methodology. Theoretical studies of gas mixture flows in mine gas-drainage pipelines, as well as the laws of...

Purpose. The research aims to assess the efficiency and performance of solid media destruction in directed blasting of a charge with variable cross-sectional shape. Methods. Numerical modelling of the blast wave interaction process is performed using the finite element method based on the Euler-Lagrange algorithm. The Johns-Wilkins-Lee equation of...

The purpose of this study is to use remote sensing data to map the deposits of the Kryvyi Rih iron ore basin. Several methods for estimating iron oxide content have been applied and tested. Using image processing techniques, color composites, band ratios and supervised classification, a map of rocks with different iron oxide contents in the Inhulet...

Since the majority of emergencies on belt conveyors of mining enterprises are associated with the conveyor framework, the article considers the failures of its elements - roller supports. The process of functioning of the framework is presented as a Markovian process of death and reproduction for a system of n parallel connected elements (roller su...

Surface mining operations lead to an increase in the depth of open pits. As a result, there is a need to choose a conveyor transport, which allows transporting rock mass to a great height at high lifting angle. Conveyors with deep trough belts and tubular and steep incline belt conveyors are used to transport rock mass along curved and vertical rou...

The increased intensity of rock crushing using blast energy is a live problem for mining companies in Ukraine engaged in the extraction of hard rocks. The solution to this problem is to increase the share of blast energy spent on rock mass destruction. The paper presents the results of pilot studies of the efficiency of rock breaking in the massif...

The paper examines the process of formation and propagation of a dust and gas cloud in a blind drift during a drilling and blasting operation. The length of zone of the active-stage detonation product propagation is determined. A formula for determining the distance of transport of dust particles by ventilation flow is obtained. It was found that t...

Open pit mining is accompanied by emissions of fine dust and hazardous gases into the atmosphere. This is related to the operation of open pit transport, drilling and blasting operations. The release of harmful components into the quarry space and the increase in their concentrations has a negative impact on the health of working personnel and lead...

The purpose of the work is to reveal the regularities of the influence of the gaseous phase on the process of filtering carbonated liquid and to characterize the physi-cochemical processes during the implementation of the method of reducing mine methane emissions. The development of minerals can be accompanied by the release of a large amount of me...

The movement of air leaks through the goaf of coal mines can lead to gas contamination of workings with the formation of local and layer accumulations of methane. This increases the likelihood of explosive situations. Therefore, an important factor is the ventilation scheme used in the excavation area. The process of gas flow through a goaf is an u...

concentrations in the vacuum degassing gas pipeline. Methods. Analytical dependencies for determining the absolute pressure, volume flow rate and temperature of the gas mixture in link of degassing gas pipeline and an empirical dependence for determining the volume flow rate of air in the inflows coming through the flange connections of the gas pip...

At present, due to the complexity of technical systems, industrial production is becoming a source of accidents, disasters, leading to large human and material losses, as well as to environmental pollution. In particular, this applies to conveyor systems for mining enterprises. The main causes of accidents and disasters in the conveyor transport of...

Conveyor transport of mining enterprises is a constant source of accidents. With increasing depth of mines and quarries and with an increase of the load on the transport systems, the problems of ensuring the safety and health of people, environmental protection. The solution of these problems is associated with the development of the theory of reli...

The purpose of the work is analysis of technical measures to reduce pollution of the mine degassing network and vacuum pumps with solid deposits and water accumulations. Research methods. To solve the task, the analysis of sources and causes contamination of gas pipelines for degassing and vacuum pumps was carried out in the work. The main require...

The purpose of research: to improve the efficiency of belt conveyors by optimizing the service life of the conveyor belt for various designs of loading devices and their operating conditions.The issues of optimizing the parameters of loading devices are described in detail in [1], in which the equations of the goal are given in terms of performance...

The issue of accounting for the accumulation of liquid in the mine degassing network during gas-dynamic calculations is considered. Geometry of fluid accumulation in the cross section of degassing pipeline and the formulas for geometric parameters are presented. A scheme of wave generation on the liquid surface is considered. Dependence for the coe...

The methods and means of control for gas pipelines, as well as signs of liquid accumulation are present. Dependencies for determining the volume flow of gas mixture and the absolute equivalent roughness for internal surface of degassing pipeline is given. The graph of changes in local pressure losses of the gas mixture in the place of fluid accumul...

Purpose. The aim of the research is to develop conceptual fundamentals for the functioning of the mine degasification system based on the studies of the effect of the units of degassing and efficiency of their work on the concentration of me-thane in the ventilation flow. The accumulation of condensate in the pipeline degasation leads to increase i...