Department Head
Nickolay Nickolaevich Grishchenkov, Doctor of Engineering Science, Professor
tel.: +7 (856) 300-27-9; +7 (856) 340-64-36
e-mail: oszpo@ranimi.ru
Awarded with:
- Miner's Glory Medal of the III degree;
- Miner's Glory Medal of the II degree;
- Miner's Fame Medal of the III degree.
N. N. Grishchenkov is a member of the Presidium of the International Society for Mine Surveying (ISM) and a member of the Russian Union of Mine Surveyors; Chair professor at the Mine Surveying Department of the Donetsk National Technical University, State-Funded Educational Institution of Higher Vocational Education. Nickolay Nickolaevich Grishchenkov is one of the leading experts in the sphere of research into geomechanical processes that occur in case of undermining with stopes. While being the author of more than 140 publications and a member of two Dissertation Councils, he actively participates in training new specialists. Under his supervision four Candidates of Engineering Science successfully defended their theses; one graduate student is working on the thesis. The main lines of N.N.Grishchenkov’s scientific activity are:
- Automation of the mine surveying support for mining operations;
- Prediction of the soil surface displacement while taking into account the mesorelief and longwall progress dynamics;
- Research into geomechanical processes that occur in a rock mass and at a soil surface in the course of conducting underground mining operations.
Modern Lines of Scientific and Applied Scientific Research
- prediction of the impact of under- and over-mining operations on the mine roadways;
- calculation of soil surface deformations while taking into account the mesorelief, and of the deformation increase dynamics;
- monitoring of the state of the existing built-up areas at the mine takes of operating mines;
- determination of the residual deformation resource of buildings&structures operated under challenging mining and geology conditions with the use of non-destructive monitoring methods;
- development of digital terrain models for the territory of Donbas at the mining operations influence zones;
- prediction of the correlation between the buildings&structures and the undermined basement while taking into account its rheological properties in case of multiple undermining;
- specification of permissible and critical soil surface deformations;
- development of measures to protect buildings and structures against the impact of soil surface deformations;
- elaboration of measures to improve the pipelines resource under challenging geomechanical conditions;
- geomechanical monitoring of the soil surface deformations and of the undermined objects;
- correlation between on-surface objects and flooded basement, and development of measures to protect buildings&structures at the flooded areas;
- assessment of the degree of the displacement process activation impact on the on-surface objects in the course of flooding the mine roadways;
- shooting of the surface objects and relief forms using a ground laser scanner.
Developments and Scientific Achievements
The department employees have obtained patents for inventions, published hundreds of printed works, elaborated thousands of conclusions and recommendations for collieries.
Employees of the department are co-authors of a number of regulatory and regulatory&procedural documents regulating the production activities of mining enterprises:
- KD 12.12.004-98Coal Mines Liquidation. Soil Surface Protection against Flooding Mine Roadways. Recommendations;
- DSTU 101.00159226.001-2003 Regulations for Undermining Buildings, Structures and Natural Objects in the Course of Underground Coal Mining;
- Recommendations for the Choice of Construction and Mining Measures for Protecting Undermined Settlements and Industrial Enterprises;
- DBN V.1.1-5-2000 Buildings and Structures at the Undermined Territories and on Collapsible Soils.
In 2020-2022 the department developed a draft regulatory legal act Rules for Undermining Buildings, Structures and Natural Objects in the Course of Underground Coal Mining. The sections of the draft regulatory legal act and its 14 appendices developed will allow regulating the undermining projects implementation, applying new methods for predicting soil surface displacements and deformations caused by the impact of undermining and flooding the underground mine roadways.
The application of the provisions set out in the draft regulatory legal act will make it possible to specify the requirements for intelligent coal extraction and the usage of mining and structural protective measures, to improve the safety of the undermined buildings and structures.
Currently the department’s staff is involved in the scientific and research work Development of Geomechanical Principles for Protecting Surface Objects under the Conditions of Challenging Relief Structure at the Undermined Territories, and Research into the Formation of Zones with Intense Rock Mass Deformations. The studies performed prove that the influence of mesorelief on predicted deformation values is significant and reaches 50-80% of permissible slopes values, curvature and relative deformations for a number of protected on-surface objects. At considerably steep slopes of mesorelief there also exists a problem of slope stability and slope soil displacements that pose a threat to buildings foundations, utilities, pipelines, etc. Soil surface displacement process activation in case of flooding mine roadways of a coal mine being under close-down procedure also results into similar problems at the slopes of mesorelief. All these factors require scientifically substantiated choice of measures for protecting objects (mining and structural measures).
Thus, the theoretical substantiation of the soil surface deformations prediction and the choice of measures for protecting buildings&structures at mesorelief areas undermined with underground mining operations is a crucial scientific task, the solution whereof is of a great theoretical and practical importance for the national economy and will contribute to improving the safety and efficiency of mining operations.
Taking into account that most of the territory of Donbas is undermined, and the process of closing down the mines continues, all of the mentioned processes pose hazard to the integrity of the housing stock of the Russian Federation, and as well can result in damage to utilities and transport communication facilities. To predict the behavior of subsurface rocks an additional research into the process of the rock mass and soil surface displacement at the mine takes of operating and closed mines is required. Such research will improve the safety of on-surface objects at the undermined territories of Donbas.