Address the major aspects of waste disposal in underground space. Are key problems of isolation of wastes in underground salt deposits? Proposed waste disposal technology, based on the use of waste for immobilization of natural mineral salts.
The basic aspects of safe mining of potash deposits is reviewed. Practical examples of the mechanism and possible consequences of violating the integrity of the waterproof rock strata are described. Use of remote non-destructive monitoring system for non-destructive integrity breeds of the waterproof rock strata is proposed.
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.
The relationship between displacements of the excavation contour and distance to the excavation face is obtained in the paper. The relationship allows to calculate support pressure with the account for delay of the support installation. Some calculation results of axial forces in the support are given. Calculations are made on the basis of finite-element method with three dimensional models.
An example of application of finite element method in rock mechanics is presented. Parameters of stress-and-strain state of rocks in vicinity of a shallow transport excavation are estimated. Some results of numerical modeling are presented.
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.
Methods of substantiation of a rational mining technology for the new potash horizon are presented in the paper. Progressive technological mining schemes for potash mining company «Belaruskaliy» are reviewed, as well as the geological conditions of the IV potash horizon. Basic aspects of the geomechanical substantiation of parameters of technological mining schemes for conditions of the IV potash horizon in the presence of influence of the overlying horizons are also presented. Results of modeling of the stress-and-state strain of the rock strata with production horizons are described.
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 scheme of approach of evaluation of the stability of underground structures with account for seismic activity of rock strata is introduced. Some aspects of estimation of stability of underground structures under dynamic loads are also present. Methods of choosing the safe parameters of underground mining with account for seismic and tectonic activity of rocks are shown.