ROLE OF GEODYNAMIC MOVEMENTS IN WATER BREAKTHROUGHS INTO WORKINGS AT EXPLORATION UNDER DIFFICULT HYDROGEOLOGICAL CONDITIONS
| Autor: | Anatoliy D. Sashurin, Andrey A. Panzhin, Timur F. Kharisov |
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| Jazyk: | ruština |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 332, Iss 6, Pp 28-38 (2021) |
| Druh dokumentu: | article |
| ISSN: | 24131830 2500-1019 2413-1830 |
| DOI: | 10.18799/24131830/2021/6/3233 |
| Popis: | Relevance of the study is conditioned by wide spread problem of prevention of water mass breakthroughs into underground mine workings, successful solution of which in many respects determines the efficiency and safety of exploration. The aim of the research is to study the interrelation of modern geodynamic movements with danger of water objects breakthrough into mine workings during development of deposits in difficult hydrogeological conditions. Object: massif of deposits in difficult hydrogeological conditions, located under a powerful sedimentary stratum containing several aquifers. Methods: analytical, satellite positioning with dual-frequency GPS geodetic receivers, computer simulation of vector and tensor deformation field. Results. Based on the analysis of occurred emergency situations related to water breakthroughs at the mines, their causes and methods of prevention, it was found that one of the most important factors causing a breakthrough of water bodies are modern geodynamic movements that form a heterogeneous mosaic stress-strain state in the rock mass, which prevents the preservation of the integrity of water-protective massifs. The known methods to prevent the danger of water breakthrough in the rock by laying the depleted space and maintaining the overlying thickness of the whole, the appointment and application of parameters of treatment works without taking into account the formation of real tensely-deformed state under the influence of modern geodynamic movements are usually accompanied by accidents. As recommendations for prevention of water breakthroughs into the mine workings the method of studying modern geodynamic movements and the stress-strain state formed by them was presented and tested on the example of the massif Elanskoe and Elkinskoe polymetallic deposits. The vectors of trend movements of points together with the tectonic structure of the investigated region are established. Maximum vertical rises and maximum horizontal displacements were fixed. The obtained results of measurements using mathematical apparatus of solid medium mechanics were transformed into vectorial and tensor representation of deformation field with selection of main components of deformation tensor. Conclusions. The studied array is located in the temperate zone of stress-strain state with a characteristic multi-directionality of the deformation tensor, which leads to the development of shear deformations in an array of rocks, adversely affecting the stability of rock workings, as well as contributing to the disclosure of natural structural disorders of the array of rocks and improvement of its filtration properties. Increase of reliability of applied methods for preventing the danger of water breakthroughs into mine workings demands carrying out of special researches of formation of a real tensely-deformed condition and consideration of its parameters at designing and conducting clearing works. |
| Databáze: | Directory of Open Access Journals |
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