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The research upon the influence of the underground mining upon the surface represent a primordial preoccupation in order to highlight the moving phenomenon and to take the required measures for the protection of the surface and its existing objectives. Thus, the necessity of monitoring the studied phenomenon and the need for prognosis in taking decisions for a durable development leads to the apparition and the creation of topographic techniques and concepts for obtaining information, using the installation in the studied area of marks to observe the deformation and the movement of the surface. The object of this paper is the monitoring process in the East area of the coalfield in Valea Jiului, based on observations that may be visualised, questioned and researched in several areas from the study perimeter in order to find efficient rehabilitation and development solutions of the area, considering the reality in the field and the effects of the subsidence. The documentation for the research in the present paper was made in Compania Nationala a Huilei S.A. of Petrosani, Romania and the measuring was performed in the eastern area of the coalfield. After processing and analysing data and information, a comparison was made between the existing data inside the host company and the data from the field, gathered with the method of radiation with the help of dedicated modern technology, leading to concrete results. The results presented in our study in tables, diagrams, reports and comparisons permit a prognosis of the influence the subsidence has upon the anthropic environment, helping to take correct decisions, necessary to a durable development in the affected area from the eastern part of Valea Jiului coalfield. The paper highlights the fact that subsidence continues to be of large interest due to its involvement in the problems of environmental protection and the protection of the constructions at the surface. The research leads to the conclusion that, following observations in the areas affected by underground exploitation, prognosis on short, medium and long time are possible for the studied phenomenon. These prognoses have a special importance because they can be used for future studies for a durable development of the areas affected by the underground mining. Â

Topographic Research upon the Subsidence in the East of the Mining Basin of Petroşani