Purpose. To create the technology increasing the level of ecological safety of underground mining of iron ores by means of decreasing the number of harmful substances released into the atmosphere.methodology. Laboratory and industrial research studies of the condition of the atmospheric air around mine arrangement were conducted by means of a physical-and-chemical method and biological testing. The standard method for calculation of their concentration in the atmosphere was used for determination of features of harmful substance dispersion.findings. Regularities of ground concentration of total influence of harmful substances changing with taking into account a specific consumption of explosives and distance from an emission source are revealed. The dependence of conditional indicator of damageability of bioindicators changing with increase in distance from a source of emission and specific consumption of explosives is established. The method for calculation of ecological assessment of atmospheric air condition around an emission source is developed.originality. Dependence of influence of ground concentration of harmful substances on damageability of bioindicators at the cellular and organismal levels is established, which allows estimating an ecological state of atmospheric air on industrial territories.Practical value. Regularities of inluence of ground concentration of total impact of harmful substances on a condition of indicator systems are determined that allows estimating the state of the environment and increasing reliability of local environmental monitoring around an iron-ore mine. The technology of drilling-and-blasting operations conducting in which emulsion explosives are used during mining of iron ores by means of the chamber mining methods, which allows decreasing the hazard index of harmful substances influence on the atmosphere, is developed and implemented.

Topicality of rock pressure energy usage in technologies of underground mining of deposits is revealed. Methodology of geo-energy processes research in the interior of the Earth is described. Energy theory of zonal capsulation parameters research by massif of underground workings is proposed. Results verification of theoretical research is executed by laboratory and industrial tests conducting. Economic and mathematical model of determination of unit costs on types of mining operations is substantiated and volumes of savings during usage of geo-energy during mining operations conducting are determined.

Purpose. The main purpose of the work is identification of massif zonal fragmentation around mine workings by means of industrial methods of research. Methods.Research into processes of massif zonal fragmentation around mine workings was carried out by means of field experiments with the usage of methods of observation and estimation, mine surveying, massif unloading, deformation of boreholels and deep bench marks.Findings. In industrial conditions, results of research into massif behavior around mine workings allowed to define the steady dependence of massif fragmentation depth on the depth of workings contour destruction. It is established that the form of destruction contours of the development and stope ore tend to ellipsoidal shape, the steadiest form of mine working. The change of massif deformation depth across the contours of stoping chambers is mainly realized along power dependence, while in adjoining preparatory workings it is realized on exponential dependence.Originality. Systematization of processes of massif zonal fragmentation around mine workings with the purpose of rock pressure usage in technologies of ore deposits mining.Practical implications. The steady form of developing and stoping workings contour destruction is defined and dependences of massif deformation depth change containing workings are established. Keywords: industrial methods of research, stress-strain state, stoping and development workings, depth of workings contour destruction, zonal destruction of the massif

Purpose. To substantiate drilling-and-blasting technologies allowing to reduce the amount of hazardous substances affecting the level of ecological safety during underground ore mining.Methods. The laboratory research of atmospheric air condition in the vicinity of mine were conducted by means of the physical-chemical analysis. The normative technique for calculation of harmful substances concentration in the atmospheric air was used for defining peculiarities of ecologically hazardous substances dispersion in the atmosphere from mine ventilation shafts.Findings. The research into ecological condition of the atmospheric air in the vicinity of iron-ore mine allowed to reveal the regularities of changing the ground level concentration of ecologically hazard substances depending on the distance to the ventilation shaft. Values of hazard indices were determined for different distances from the emission source in the cases of TNT-based and emulsion explosives application.Originality. Regularities of hazard index change depending on the ground level concentration of ecologically hazardous substances and the distance to emission sources were established. Practical implications.The new technology of drilling-and-blasting operations using eco-friendly emulsion explosives during ore deposits mining by means of square-chamber system is proposed. It will allow to lessen ecological hazard indices of harmful substances effect.

The first classificationsw of physical properties of rocks and hypotheses of rock pressure in the world practice are analysed. The analysis of internationally widely known theories about rock pressure and physical processes around mine workings is executed. Classification of theories about rock pressure on classification feature “condition of investigated massif” is constructed. The energy theory that describing capsulation by the massif of underground mine working is offered.