Research of possibilities for extraction of secondary resources from mining waste and mineral processing waste

Substantiation of new methods and technologies of processing and enrichment of technogenic wastes and previously formed wastes of mining and metallurgical production [1-5]. The choice of areas of rational use of man-made waste from mining and metallurgical production must be performed on the basis of a comprehensive study of raw materials, as well as the analysis of potential consumers in the region of the producer

Ecological aspects of managing the stressed- deformed state of the mountain massif during the development of multiple coal layers

The ecological consequences of long-term development of coal deposits for the components of the environment, buildings, communications and infrastructure facilities have been analysed. The stress-deformed state of the rock massif around the preparatory working in the development of multiple coal layers is determined. The parameters of the development of the contiguous layers in the conditions of the mines of the Lviv-Volyn Coal Basin are substantiated. The complex of nature protection measures allowing to reduce the negative consequences of disturbance of the earth's surface in the development of multiple coal layers is substantiated

Ecological aspects of filling of worked-out area during underground coal mining

The ecological consequences of underground coal mining and the mechanisms of transformation of the rock mass and the earth's surface are determined. To increase the efficiency of environmental activities of coal mining enterprises, the expediency of introducing the technology of stowing of the worked-out areas with grouting solutions using rock from dumps, ash, waste from coal processing plants is substantiated. The implementation of the proposed technological solutions will ensure the protection of land, buildings and structures from under-mining, as well as improve the environmental situation in coal mining regions

Ecological aspects of managing the stressed-deformed state of the mountain massif during the development of multiple coal layers

The ecological consequences of long-term development of coal deposits for the components of the environment, buildings, communications and infrastructure facilities have been analysed. The stress-deformed state of the rock massif around the preparatory working in the development of multiple coal layers is determined. The parameters of the development of the contiguous layers in the conditions of the mines of the Lviv-Volyn Coal Basin are substantiated. The complex of nature protection measures allowing to reduce the negative consequences of disturbance of the earth’s surface in the development of multiple coal layers is substantiated

Investigation of processes of rocks deformation and the earth’s surface subsidence during underground coal mining

Many years of coal production have led to significant changes in the stability of the rock mass and the earth's surface in the territory of the coal mining regions of Ukraine. The reasons for such changes are the increase of fracture and decrease of the strength of rocks, stratification and hanging of rocks in the boundary parts of workings, the presence of interstices in the coal-face workings, large-scale subsidence of the earth's surface, underworking of a considerable number of buildings, structures and infrastructure

Ecological aspects of managing the stressed-deformed state of the mountain massif during the development of multiple coal layers

The ecological consequences of long-term development of coal deposits for the components of the environment, buildings, communications and infrastructure facilities have been analysed. The stress-deformed state of the rock massif around the preparatory working in the development of multiple coal layers is determined. The parameters of the development of the contiguous layers in the conditions of the mines of the Lviv-Volyn Coal Basin are substantiated. The complex of nature protection measures allowing to reduce the negative consequences of disturbance of the earth’s surface in the development of multiple coal layers is substantiated

Justification of the method of dust emissions localization on mobile crushing and sorting complexes of quarries with the use of air-and-water ejectors

Rock mass transloading from bunkers to conveyors or from conveyors to conveyors in quarries is accompanied by intense releases of dust into the atmosphere, which is a significant danger to the environment. The regularities of the interaction process between dust particles and droplets of a liquid (water) in polluted air flow are determined. It is established that when the pressure of compressed air is changed from 0.1 to 0.4 MPa (approximately in the range of 1 to 4 atm.), the average size of droplets decreases from 26 to 9 microns. Justification of the localization method of dust emissions into the atmosphere, arriving from the units of dust formation in crushing and sorting complexes of quarries, is done with the use of air-and-water ejectors − irrigators with highly efficient water use, sprayed with separate nozzles. Variants of air-and-water ejectors placement on dust formation sources are grounded. The choice of the optimal mode of air-and-water ejectors operation depends on the characteristic sizes of the formed dust particles, which are determined by the parameters of the crushing and sorting equipment in the quarry. Reducing dust emissions within the sanitary protection zone of the quarries prevents its dispersion in the adjacent zone