where (Q_{{wr}}) are workable coal reserves, thou t; (k) is the coefficient taking into account the decline in annual production at the beginning and end of the mine operation (for coal and shale deposits mined by the open-pit method 0.92–0.96); (T) is the asset life of main mining equipment, years [].. In the case of block mining, the …
Due to terrain and transportation constraints, some open cast mines have to choose a weak basement as their tailings dumping grounds. Therefore, ensuring the bearing capacity and slope stability of dumping grounds on the weak basement is of great significance for the production capacity and economic benefits of open cast mining. To …
Open cast mining has been practiced in South Africa since the late 1970s under near ideal geotechnical conditions. In the past decade, with the exhaustion of the traditional South African coal fields, geotechnical conditions have deteriorated. In addition, the nature of the open cast coal mining industry is changing from the conven-tional strip ...
To plan the production capacity of open-pit coal mines, according to the occurrence of each coal seam in the mining boundary (as shown in Fig. 1), this paper studies the influence of working face ...
Geotechnical study and optimal slope design at Lajkura open cast coal mine, India ... 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 ...
This study considered and developed four artificial intelligence (AI) techniques to estimate mining capital cost (MCC) for open-pit copper mining projects with high …
PDF | surface mining methods; open pit planning and design; open pit terminology; stripping ratio; factors governing strip mining; …
Recent studies of in situ pillar mining have found the extraction of the pillars to be feasible during opencast mining due to the high extraction rates of coal, relatively low stripping ratio, safety of the operation, and general environmental requirements. The geological model of an opencast pillar mining operation within the Witbank coalfield ...
By analysing the factors influencing the economic stripping ratio of opencast mines, Liu Chuang et al. 7 established a model for the location of stripping, mining and dump works in opencast mines ...
In this paper, in light of the definition of the effective stripping ratio in the progress of surface coal mining, based on the ballistics theory and surface mining …
20221114 Note: (1) Stripping ratio is defined as the ratio of OBR to Coal produced in Open Cast mining (2) Meghalaya OBR figures are not known and not reported (3 ) 202217 Abstract Slope stability is a prominent problem for the efficient application and promotion of highwall mining technology, especially when mining residual ...
Rising strip ratios limit mine life Mines in NSW may be getting bigger and bigger, but rising strip ratios will ensure there is an upper limit on this growth. The strip ratio represents the amount of waste or surface material that must be removed to extract a given amount of coal and serves as a measure of an open-cut mine's implicit efficiency.
The stripping ratio in a mine is chosen based on economics. A high grade orebody can support a high stripping ratio. A low grade ore body cannot support a high stripping ratio. Thus you may have a ...
Production and Supply costs of coal - IEA Clean Coal Centre Selection of practical bench height in open pit mining ... Manas K Mukhopadhyay1, Suvomoy Adak2, Palash Banerjee
The production cycle of open-cast coal mines generally includes drilling, blasting, loading, hauling and coal preparation activities. Individual optimization of these activities does not mean that the whole system is optimized. This paper proposes a cost model considering all activities in mining cycle and system-wide approach to minimize …
Abstract A large open cast coal mine always needs a stable side slope to prevent collapse due to excessive overburden pressure. The present study was undertaken to ... factor (SF) is calculated as the ratio of the existing shear strength to the shear stress at equilibrium [3]. However, the design of mine slopes is quite complex in nature.
Trapper mine is a dip-line strip coal mine, located about 10 km (6 miles) southwest of Craig, CO. Blast casting has the potential of considerable savings in the cost of overburden stripping.
Optimum design of the open cast mine pit slope is important from both stability and economic point of view. Hence, the aim of the design of an open cast mine is to provide the best possible outline of excavation with respect to safety, ore recovery and financial return [].The most crucial part of the design is to find the optimum slope angle …
rates of coal, relatively low stripping ratio, safety of the operation, and general environmental requirements. The geological model of an opencast pillar mining operation within the Witbank coalfield has indicated that some 30% of the coal in the no. 2 seam remains in pillars. The no. 4 and no. 1 seams are yet to be mined. Opencast pillar ...
open cast mining technology can play a vital role to full fill the demand of estimated coal production. As the open cast mining ... stripping ratio being arranged presently turning upward to 1:15, at the profundity about 500 m enormous creation volumes ... influence the analysis for slope stability. The different geo-mechanical properties of ...
Influence Of Striping Ratio On Open Cast Coal Mining. influence of striping ratio on open cast coal mining The proposed Coaldale open cast is a relatively small coal mine within an area heavily modified by historical a significant influence on stream macroinvertebrate communities the therefore a higher stripping ratio of waste to coal …
The main topics that will be discussed in this chapter will include an introduction into the general features of open pit mining, ore body characteristics and configurations, stripping ratios and ...
The method aims to release the internal dump space after mining the common side gang of adjacent opencast mines, increase the economic and reasonable …
By analyzing and comparing the stripping ratio, mining life of the district, fault influence, difficulty of transition connection in the mining districts, the convenience …
Dynamic simulations are powerful tools, but only if they are developed using the correct methodology, and with information that has been verified. Mining houses rely on simulation to confirm that complex, integrated systems can achieve design capacity before investment decisions are made. Work conducted in the realm of validation can make an …
1. Introduction. Coal is considered the world's most abundant fossil fuel and is an chief energy resource used mainly power generation. Generally, in India to produce electricity accounting for, more than 70% of the total electricity production (Gupta and Paul, 2015; Chikkatur, 2005).Open-cast mining is gradually increasing in the share of coal …
The main purpose of this chapter is to discuss the general features of open pit mining, ore body characteristics and configurations, stripping ratios and stripping overburden …
It is the most economic option for a deposit up to that depth where the economic ratio of ore and waste can be sustained. There are many advantages to the open pit mining method, namely: ... (2001) Biological activity of soils from reclaimed open-cast coal mining areas in Upper Lusatia using testate amoebae (protists) as indicators. Ecological ...
In many mineral industries, like coal industry, in open cast mines, coal can be extracted only after removing layers of soil, stone etc. ... Suppose in an opencast mine, 20 lakh CuM OB will be removed during the life time (suppose 15 years) against the production of 10 lakh Te of coal, the standard stripping ratio will be 2.1. Company wise OBR ...
The stripping ratio of the Marki Mangli-I coal mine is 6.75 which is very large. Existing overburden dump of the mine consists of three benches of overall height of 30 m and bench width of 20 m.
2. Open cut mining methods strip mining Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been significan t developments in this method of mining. The mines are now operating at significantly higher annual tonnages, growing deeper, more complex and operating at higher stripping …
The underground method is suitable for extraction of deeper coal seams, whereas opencast method is suitable for shallow coal seams. However, due to less production cost, mechanisation, and less ...
The average stripping ratio of Yimin opencast coal mine was 2.68 m 3 t −1 (Yang 2002). The production of Yimin opencast coal mine was 21 × 10 6 t a −1, thus …
