New Approach to Assesment of Slope Stability on Working Bench in Open Coal Mines (original) (raw)
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Trend analysis in assesment and prediction of slope stability in open coal mines
2011
Geotechnical analysis of the condition of slope stability of excavation blocks in the open coal mine allows to define the safety assessment and prediction of the ongoing process of exploration and planning in future development. Subject of research in this paper will be geotechnical analyze of working environment covered with everyday exploitation and already completed benches. In this paper will be performed comprehensive analysis of several distinctive sections. We used the information from monthly reports of geotechnical stability of excavated blocks in the period from April 2009 to December 2010. The primary goals of the research area is a function of calculating, assessing, analyzing and prediction the geotechnical stability of final slopes of the coal open pit mine. Accordingly, the goals of the research in this paper, in accordance with the basic task of main plane of the coal mine, will be:-Determination of the coefficient of stability;-Assessment of the stability of excavation blocks;-Analysis of the slope stability of working and final benches;-Trend analysis and prediction of assessing the slope stability and-Conclusion and suggestion for further research
2019
The “Brod-Gneotino” coal deposit is located on south-west of the Republic of North Macedonia, near the city of Bitola and about 10 km south of the deposit "Suvodol". According to the engineering - geological regionalization of the terrain, the rock masses in the deposit are grouped in the part of the various lythogenetic units, or it is characterized by the presence of several engineering-geological groups of rock masses. Based on the overall performed investigations and explorations, statistical analysis was made on the results of the physical - mechanical examinations and were obtained calculation values necessary for designing of the slope stability. The calculation of the stability is according the method of Bishop (with the software SLIDE 7.0), method that is based on the conditions of boundary equilibrium. Safety coefficients are adopted according the "Rulebook on Technical Norms for Surface Exploitation of deposits of Mineral Raw Materials for slope stability o...
Geomechanical Stability of Slopes of the Surface Coal Mines of the Main
DergiPark (Istanbul University), 2016
The subject of this paper is the analysis of the geo-mechanical stability of slopes of the surface coal mines of the main geometry factors. Its main purpose is to define the interaction between the geological environment and the engineering activity. Therefore, in solving this problem all available documents from the previous researches and examinations for obtaining more credible and relevant data are used. Because of the above mentioned, the thesis shall obtain the following analyses: Description of the existing situation from geological aspect; Application of various numeric and graphical methods; Selection of most optimal geomethric parameters and stability analysis; In general, various methods are used for slope stability analysis. They can roughly be divided into two groups, such as: Border balance methods. In general, the slope stability analysis consists of the following components: Safety Factor Fs; Slope-Geometrical properties; Physical-mechanical properties of tested soil materials; Groundwater. The stability calculation shall be conducted by various methods with the software packages GGU Stability (BISHOP, JANBU). Discovering the right measure and the exact ratio between the advantage and the limitations of a given method is possible only through appropriate methodological approach, where aspects relevant to specific problems in geotechnical engineering shall be analyzed. Following significant results occurred from the work on this doctoral dissertation: 1) Analysis and sensitivity evaluation of the safety factor in the change of the values of certain geo-mechanical parameters. 2) Critical review of the selection of methods for geo-mechanical stability analysis;
Slopes stability analysis from Rosia Poieni open pit mine, Romania
MATEC Web of Conferences, 2021
In the case of Roşia Poieni open pit mine the level of +805 m was established as a daily operating limit; the division into benches was based on this level by dividing into horizontal slices with a thickness of 15 m, equal to the height of the bench. Thus, there were 27 benches in the Curmătura area and 23 benches in the Ruginiş area. The general slope angle was set at 35°, the angle for which the tailings volumes and implicitly the opening-up coefficient were calculated. The stability analysis was performed for individual bench, 2 benches system and the general slope of the quarry (consisting of 24 benches), using two methods (Fellenius and Janbu). A polygonal slip surface was also modelled; such potential landslide surfaces can appear in the slopes of the Roşia Poieni quarry due to the natural cracking systems of the massif but also due to the secondary cracking generated by the used drilling-blasting works (exploitation technology). The stability check was done by applying Hoek's graphical-analytical method; the determined values for the safety factor satisfy the condition of being greater than 1.3. In these circumstances, no further measures are required to increase the stability reserve.
2013
The future of Kosovo's economic development relies on the exploration of natural resources, particularly, mining. Great importance has been placed on the exploitation of these resources via the surface utilization of marls. Marls being the prevalent raw material for cement production. Since the beginning of 20 th century, great achievements have been made in the geo-techniques field, leading to the remarkable progress in the art of mining.This paper through the limit equilibrium solution examines the optimization of parameters for slope stability and presents the findings of the on-site research and lab workings conducted on the open-pit mines of marls near the cement plant "SHARR CEM" Hani i Elezit. Expansion of the mine to the southeastern boundary will require significant stability analysis.Therefore in order to determine represented parameters as realistically as possible, physic-mechanical parameters were drawn from the material on the slope. The lab results were processed from astatistical perspective their reduction were conducted under geotechnical conditions for safety. This parameters where adopted so that slope stability calculations could take place. Two analytic methods were used for geostatic analyses,The Bishop'smethod and Janbu's method.
Study of Slope Stability (Open Pit Mining, Algeria)
International Congress and Exhibition" Sustainable Civil Infrastructures: Innovative Infrastructure Geotechnology", 2017
The objective of our work is the study of the influence of the dynamic load due to the use of the explosive in the stability of the slope of an open pit mine, for this purpose we used the method of limit equilibrium to calculate the value of the safety factor through the geotechnical software SLIDE. On the one hand the calculation was carried out under static loading and on the other hand the dynamic loading is taken into account, which allowed us to conclude that the dynamic load influences the safety coefficient. Finally, a proposal to stabilize the slope at through a reprofiling of the bench is presented.
High wall slope stability assessment of open pit coal mine- A case study
2020
An opencast coal mine is being operated by Singareni Collieries Company Limited (SCCL) is located at Peddapalli District of Telangana State. The mine is situated on the southern bank of river Godavari. There are six coal seams under exploitation in the mine viz. – I, II, IIIA III, IV and V seams. The mine is working with an annual targeted coal production of 4.09 million tones. The present working depth of the mine is 193m with a stripping ratio of 5.57 m 3 /tonne. With the removal of overburden of about 300 million m 3 in the mine, resulted in the formation of high wall slopes towards south side.The high wall slopes are developed in Barakarand Talcher formations. In this area, a major fault, numerous minor faults\slips, joints and shear zones are noticed and they are more or less parallel to fault. Presently, tensile cracks and vertical subsidence observed at top surface of the high wall slopes due to mining activity in this area. An assessment of the south side high wall slopes ne...
2016
Several types of instabilities can menace the personnel and equipment in the open cast mines. Their kinematicis dependent commonly on the nature, the structure, the fracturing and the strength of the rock mass. A scientific assessment vis-a-vis their equilibrium is suggested. For this task a considerable amount of field work must already carrying out to supply the necessary data ie: geometric, mecanic and geologic parameters. The main purpose of this research is identifying different modes of slope failures that may develop on the career “ENOF” of Jebel Gustar, by a multi-step analysis. For this task, i) a structural analysis; ii) an estimation of the rock mass and discontinuity mechanical properties, iii) a rating of the rock mass quality, iv) and a numerical simulation of the stability are procedurally used. The results matched well with the field observations. They proved the poor stability of the career, showing a typical example of a bad slope-design. The application of such ap...