Decision algorithm for rock mechanics problems for bottom layers of potash deposits is suggested. Flow chart for the algorithm and it’s parts is shown. The algorithm represents the method to choose excavation technology for multi-layer potash deposits.
We describe the stages in the development of the method of underground dissolution of salts from the surface through wells. Formulated the key aspects of the complex method of assessing the mechanical state of rocks in the vicinity of mining solution such as cameras located in seismically active areas of potentially suitable for storage and disposal of waste
Radioactive waste received by manufacture of electric power requires a highly reliable burial place. One of the most perspective types of storehouses is underground developments in adjournment to soluble salts, created by dissolution through chinks from the surface. Existing requirements to a burial place of radioactive waste are described as key aspects of a complex method of an assessment of a mechanical condition of rocks in vicinities of chambers- storehouses in seismically active areas which are potentially suitable for storage and burial place of waste are stated.
The basic laws of gas filtration at different stages of coal deposit mining are considered. The technique used for studying complex development of power resources of coal deposits, allowing with reference to concrete conditions to receive engineering dependences for a quantitative estimation of all key parametres of investigated processes is given. On the basis of the developed approach to complex development the algorithm of the practical solution of the problem is offered.
Approaches to selection of technological mining schemes based on selective potash seam extraction are described. Progressive technological mining schemes for potash mining company «Belaruskaliy» and the geological conditions of the IV potash horizon are reviewed. Basic aspects of the geomechanical substantiation of parameters of technological mining schemes for conditions of the new potash horizon in the presence of influence of the overlying horizons are also presented. Guidelines for substantiation of progressive mining methods for the conditions of the IV potash horizon (Third Mine, «Belaruskaliy») are developed on the basis of the modeling of the stress-and-strain state of the rocks.
The growth in energy consumption demands increase in power output of the existing nuclear power plants and construction of the new ones. Radioactive waste requires high-reliable repositories to be disposed. One of the perspective types of the repositories is underground excavations in halogenous formations (created by underground mining or dissolution through boreholes from surface). The new method of radioactive waste disposal is offered in the paper.
The article states the main factors which have to be taken into account in designing highoutput cleaning complexes in conditions of the Vorkuta deposit. Basic approaches to solving this problem have been analyzed and the main problematic issues have been outlined. Research results are given, which help to establish functional dependence between the stress-and-strain state of the rock strata and its gas permeability basing on the analysis of the rock massif volumetric deformation and its impact on the filtration characteristics of the medium.
The article summarizes the main factors that should be taken into account when developing a methodology to take into account the relationship between the geomechanical state of the rock formation and its filtration properties. The main approaches to solving such problems and their disadvantages are analyzed. The results of the research allow us to establish a functional relationship between the deformation-stress state of the rock formation and its gas permeability. The relationship is based on the analysis of volumetric deformation of the formation and its influence on the filtration characteristics of the medium.
Complex geologic conditions of reservoir deposits and insufficient data on the properties and structure of rock formations often lead to mine accidents. Joint mining of salt and oil formations within one mining allotment at different depths can increase the risk of mine flooding. The article presents the main methodological approaches to justify the feasibility of mining of oil deposits in the zone of salt strata spreading. The article also provides a list of the main problems, the solution of which is necessary to ensure safe joint development of oil and salt deposits.
Рассмотрены газодинамические явления, в частности внезапные выбросы угля и газа. Показана целесообразность проведения дальнейших исследований механизма выбросов с целью создания специальной, безопасной и эффективной технологии отработки газонасыщенных угольных пластов.
The concept of the developed model (algorithm) for the formation of rational balances of supply and demand of Russian regions is given. The research is aimed at ensuring rational and efficient exploitation of energy resources in Russia. In the formation of supply-demand balances of the region, the possibility of using local fuels is taken into account. The present model has been developed and preliminarily tested on the example of the Leningrad Oblast and the Komi Republic.
The problems of development of mining education in the St. Petersburg Mining Institute are considered. The main stages of their development are considered: before the Great Patriotic War (1941-1945), during the war and in the post-war period. A brief characterization of these stages is given. Brief biographies of key figures who contributed to the successful formation of mining education at the St. Petersburg Mining Institute are given. The traditions of teaching mining engineering disciplines are revealed. Teaching traditions are based on both analytical and experimental and experimental-analytical teachers, whose knowledge is based primarily on their own industrial and scientific experience.
The paper describes the methodology of solving the problem of determining the degree of mutual influence of mining works on different horizons during the development of reserves of mine fields. By the example of mining three horizons of Starobinskoye deposit, the results of solving mining-geomechanical problems on the assessment of the stress-strain state (SSS) in the zones of influence of mined-out spaces of the salt massif are presented. The dependences for calculating the stress concentration coefficient at different configurations of the front of the development of mining works are proposed.
On the example of Starobinskoye deposit the criteria determining the choice of development systems and possible ways to increase the extraction of potassium reservoirs are considered. Different principal schemes of sylvinite extraction from pillars by auger drilling technology are proposed. The method of geomechanical justification of the parameters of pillar extraction is developed. The results of the estimation of the stress-strain state (STS) of pillars and their host massif for the characteristic time moments of the pillar delineation of mined-out spaces are given.
