The complexity of solving the problem of preventing natural and man-made disasters during intensive nature management is associated with the multifactorial nature of the conditions and causes of catastrophic events, significant variations in the properties and state of geospheres, and the lack of reliable criteria and precursors of dangerous dynamic phenomena. The modern scientific approach to solving this problem consists in modeling processes that allow to adequately describe the state of changing natural and technical systems with subsequent verification of the results of theoretical research by instrumental methods. An even greater effect is brought by the combined use of natural and theoretical methods, united by a common ideology and maximally adapted to the conditions of the problem being solved, providing continuous multivariate monitoring of geophysical fields and processes in the geospheres. In this regard, it seems very urgent to set up research work aimed at the development of scientific and methodological foundations and technical means for assessing and monitoring hazardous geomechanical processes to reduce the risk of man-made disasters during the development of mineral deposits.

Further prospects for the development of “Pioner” gold deposit are associated with the development of deep-seated ore bodies by an underground method. When assessing the bump hazard of proposed technological solutions for stripping and working out the pit reserves of the deposit and substantiating the safe working conditions, some comprehensive studies were carried out, including an analysis of the geological and geomechanical conditions of deposit's development, detailed study of the physical and mechanical properties of rocks and ores, investigation of the fracture tectonics of the deposit and stress and strain state of the rock massif of the deposit. The performed modeling of the geomechanical processes of the rock massif with the use of numerical methods made it possible to identify the safe parameters of the guarding safety pillars under the pit bottom, and also to identify areas and elements of rock structures characterized by a minimum margin of stability according to the criteria of the acting maximum compressive and tangential stresses after complete mining of ore bodies. Recommendations were developed on the rational order of mining of ore bodies and on effective ways to protect and maintain mine workings.

Введение. Внутреннее отвалообразование становится все более актуальным и применяется на месторождениях, ведущих отработку как открытым, так и комбинированным способом. В связи с этим комплексные исследования, направленные на оценку изменения геомеханического состояния окружающего массива месторождения «Восток-2» при условии размещения пустых пород в карьерной выемке, являются наиболее актуальными. Цель работы. Геомеханическая оценка влияния внутреннего отвалообразования на состояние горного массива месторождения вольфрамсодержащих руд «Восток-2», ведущего отработку рудных запасов комбинированным способом. Методология. Исследования включали лабораторное изучение физико-механических свойств горных пород, расчет устойчивости с применением современных программных средств, численное моделирование напряженно-деформированного состояния массива горных пород методом конечных элементов. Результаты. Комплексная оценка влияния внутреннего отвалообразования на геомеханическое состояние окружающего массива позволила установить, что размещение пустых пород в центральной части карьера не окажет значительного влияния на геодинамическую обстановку глубоких горизонтов. При этом в процессе формирования отвал сохранит устойчивость с достаточным запасом. Выводы. Результаты выполненных комплексных исследований на месторождении «Восток-2» могут быть использованы на других объектах, ведущих отработку в схожих горно-геологических условиях.

Based on the results of a joint analysis of seismic-acoustic monitoring data and the geological and structural features of the Niko-laevsk deposit, the main regularities of the formation of technogenic stress fields that determine its impact hazard have been identified. Additionally, using the method of mathematical modeling, a study was done of the stress-strain state of the rock mass taking into account the tectonically ac-tive fault TD-3 and safety measures were proposed to reduce the impact hazard of the rock mass at the Nikolaevsk deposit.