aimed at more specific mining methods. Bandophadhyay and Venkatasubramanian 1987 developed on of the first e studies on the implementation of expert system in the mining method selection process. It is developed to aid the mining engineers in selecting suitable mining methods for coal deposits minable by underground methods.
In order to select the reasonable coal mining method of large mine, analysing the main factors of affecting the mining method and establishing the evaluation index system of coal mining methods selection to large mine, then using Analytic Hierarchy Process AHP to calculate the weight of each index. The grey correlation evaluation model of mining method was established for large mine by
Jul 14, 2016 The selection of a mining method is one of the most important decisions made by mining engineers. An appropriate fully mechanized mining method is of great importance to mining design and capacity planning for thin coal seams. Therefore, the comprehensive evaluation of alternative mining methods is an important part of mining design. Several parameters should be considered in
The overall coal mining process consists of several sequential stages 1 exploration of a potentially economic coal seam to assess minable reserves, environmental issues, marketable reserves, potential markets, and permitting risks 2 analysis and selection of a mining plan 3 securing the markets 4 developing the mine 5 extracting ...
May 17, 2017 In this work, at the beginning the decision matrix of the experts presented by Reza Mikaeil et al. was used based on the decision matrix, the calculations corresponding to each method were implemented for the selection of mining method. The results of the WPM method showed that Conventional Cut and Fill is the optimum one with the value of 0 ...
Coal being a heterogeneous fuel varies in its properties the variation depends on many factors like type of origin of coal formation etc.Two major parameters which decide the mill capacity and performance are the hardness of the coal and the total moisture level in coal. Coal mining Choosing a mining method Britannica. Choosing a mining method.
The selection of underground mining methods is primarily based on the geologicalspatial setting of the deposit. Candidate methods can therefore be chosen and ranked based on ... popular, particularly in non-coal mining. Gravity can be utilized for ore transportation
Mar 16, 2017 Longitudinal Back, Flat-Back Mining Method Long-Wall StopingmMining Method. After starting an overhand stope the shape in which the back is carried is often of prime importance. In A, Fig. 2, is illustrated the method of carrying a flat or longitudinal back the term long-wall is used sometimes when the vein lies nearly flat.
Factors in Mining Method Selection. 1. Spatial characteristics of the deposit. 2. Geologic and hydrologic conditions. 3. Geotechnical soil and rock mechanics properties. 4. Economic considerations.
Underground Mining Methods. Soft rock Mining Methods. Blast mining. Shortwall mining. Coal Skimming or Sink and Fl oat method. Hard rock Mining Methods. Stoping. 1
the mining technologies currently in use on Federal leases and the potential for commer-cial mining technologies to extract Federal coal reserves from deep underground seams. The chapter discusses three surface mining techniques that are used in the West 1 area strip, 2 open pit, and 3 terrace pit two methods of underground mining in
Key words Equipment Selection, Surface Mining, Shovel-Truck Productivity, Mining Method Selection, Multi-Commodity Network Flow Introduction The general Equipment Selection Problem ESP is to choose a collection of compatible, but not necessarily homogeneous, items of equipment to perform a speci ed task. In many applications,
Underground coal mining recovers an average of 50 of the coal with the room and pillar system and up to 80 using the longwall method 2, 5, 10. The likely losses are identifiable in the beginning of the mining process some by the standards of legislation, some limited by mine design and some by prior exploration data 2.
Mining types and methods Coal mining. Uncheck All. Selection yields no results. Home Links. Mining Home NIOSH Home Content source National Institute for Occupational Safety and Health, Mining Program . HAVE QUESTIONS Visit CDC-INFO. Call 800-232-4636 ...
8 Methods for Protecting Coal Miners Intake air courses, which bring in fresh air to the working face Return air courses, which exhaust air from the working face The number of entries available for ventilation vary with the mining method used and the geological characteristics of the rock strata mined.
PROMETHEE, TOPSIS, and TODIM stood out as methods for use in the selection of mining method in the coal mining industry. From the research findings, it was generally concluded that OCRA, ARAS, CP, SAW, and COPRAS are simplified approaches of the afore-mentioned methods.
The main purpose of this paper is to represent a solution to the problem of mining method selection MMS in mining projects. To this aim, the well-known MMS technique of Nicholas has been modified so that in addition to eliminate its defects, it would be possible for mining engineers to easily assign their engineering judgments to unsteady and uncertain characteristics of mineral resources.
Coal mining takes place either underground or through surface opencast operations. The method used depends on the geology of the coal deposit. When is this used Surface mining is used when the coal seam is near the surface. It recovers a higher proportion of the coal deposit than underground mining as all coal seams are exploited 90 or ...
Underground mining methods are the focus of this article. The selection of a mining method for an ore deposit is based on many factors that are driven by the economics and profitability of the mine for a company. These include the following Ore grade and recovery. Cost of infrastructure.
Mining method selection MMS for mineral resources is one of the most signi cant steps in mining production man-agement. Due to the high costs involved and environmental problems, it is usually not possible to change the coal mining method after planning and starting the operation. In most cases, MMS can be considered as an irreversible ...
Mining method selection MMS for mineral resources is one of the most significant steps in mining production management. Due to high costs involved and environmental problems, it is usually not possible to change the coal mining method after planning and starting the operation. In most cases, MMS can be considered as an irreversible process.
Highwall mining is a coal mining method for recovery of outcropped coal by mechanical excavation without removal of overburden. A continuous miner with single or multiple augerscutting heads is operated underground and controlled remotely by crew located outside. Augering can be regarded as a supplementary method for open cast mining in
Stanley R. Michalski, in Coal and Peat Fires A Global Perspective, 2011 Longwall Coal Mining. The longwall-mining method is a continuous mining system that was developed for mining coal deposits uniform in thickness and slope or where the overburden pressures may crush support pillars or for improving productivity. This method relies on the complete extraction of the coal in a designated area ...
Initial capital investment for the mining methods ranged from 77,200,000 for chamber and pillar, to 122,872,000 for block caving, using LHDs. Mining costs, including all direct, indirect and fixed costs, except royalty and lease payments, ranged from 1.04 per ton for chamber and pillar to 1.35 per ton for block caving, using LHDs.
Jan 25, 2014 Equipment selection for high selective excavation surface coal mining 1. Equipment selection for high selective excavation surface coal mining by H. Aykul, E. Yalcn, I.G. Ediz, D.W. Dixon-Hardy, and H. Akcakoca The choice of which mining method to use at many large surface coal mines is often dicated by what machinery is available or what experience the mine management can
It is used for ores like tin, coal, gold, and diamonds, and derives its name from the equipment used called dredge a kind of floating excavator. These surface mining methods are considered to be more efficient and economical in extracting minerals as compared to most methods of underground mining. In fact, it can extract almost 90 of ...
The primary objective of any mining plan should be the effective integration of all the activities involved in the overall mining process that will meet predetermined targets with regard to health, safety, environmental, productivity and unit cost criteria. The South African coal mining industry and its stakeholders acknowledge that effective mine
As mentioned, surface mining or opencast coal mining is the predominant method used in. Australia, and so is focused on within this pa per. Opencast coal mining on a large scale first. commenced ...
Nov 02, 2011 2 Room Bord-and-Pillar mining or continuous mining method It is the most common supported pillar method, designed and used primarily for mining flat-lying seams, or tabular orebodies, or gently dipping bedded ore deposits of limited thickness like coal, oil shale, limestone, phosphate, salt, trona, potash, and bedded uranium ores,. Room ...
Thin coal seam mining is one of the key problems in coal mining, being able to predict thin coal seam mining method is an essential aspect in coalmine sustainable development. However, the traditional methods concerning mining method selection is hindered by multi-objective and non-continuous problem. The thin coal seam mining method prediction model based on improved neural network
Choosing a mining method. Surface mining. Surface coal mining generally involves the following sequence of unit operations 1 clearing the land of trees and vegetation, 2 ... Mining methods. Contour strip mining. Area strip mining. Open-pit mining.
The problem of selecting the mining method becomes the most important aspect of mining activities, and you should select the method that best fits the unique criteria of each location, such as spatial, geological, hydrogeological, geotechnical and other considerations such as economic, technological and environmental factors.
The selection of extraction methods in mining is one of the oldest challenges of humanity and has been studied widely, about the most relevant scientific literature begins with the first qualitative classification schemes extractive methods selection Boshkov and Wright 1973.