Optimal extraction policy when the environmental and social costs
The main purpose of this study is to simulate the optimal extraction policy of coal mining with and without the internalization of the environmental and social To further improve the simultaneous extraction efficiency of coal and coalbed methane (CBM) during coal mining operations, this study investigated CBM A mathematical model for optimization and decisionmaking of
Optimal scale extraction of farmland in coal mining areas with high
Abstract The accurate acquisition of information concerning farmland in coal mining areas with high groundwater levels can provide a basis for land dynamic monitoring and The main purpose of this study is to simulate the optimal extraction policy of coal mining with and without the internalization of the environmental and social Optimal Extraction Policy When the Environmental and Social
Optimal scale extraction of farmland in coal mining areas
Two methodsie, samplebased, objectoriented extraction and feature combinationbased hierarchical extractionwere used to extract farmland In addition, the results of our research will be useful in designing new methods of coal mining and coal mining waste storage [42, 43] and designing safety systems of manmade objects [44,45]Improving the process of coal extraction based on the
Optimal selection of coal seam pressurerelief gas extraction
Optimal selection of coal seam pressurerelief gas extraction technologies: a typical case of the Panyi Coal Mine, Huainan coalfield, China Pressurerelief gas extraction from a This manuscript outlines a methodological framework for modelling the impacts of proposed coal mining and coal seam gas extraction on downstream river Modelling the impacts of future coal mining and coal
Global methane emissions from coal mining to continue growing
The gas content of the current global underground hard coal mix 1 thus is in the range between 13 and 18 m 3 /t for mining depths from 450 to 1120 m For surface mines, the gas content of hard coal is 3–5 m 3 /t for depths from 50 to 200 m and 077 m 3 /t at the constant depth of 50 m for brown coal However, the gas content per ton of coal The techniques of stress relief mining in lowpermeability coal seams and pillarless gob side retained roadway entry using Ytype ventilation and gas drainage systems were developed to control gas outbursts and applied successfully However, as the mining depth increasing, parts of the gas drainage system are not suitable for mines with high Gas drainage from different mine areas: optimal placement of
Slope stability calculation method for highwall mining with
Slope stability is a prominent problem for the efficient application and promotion of highwall mining technology, especially when mining residual coal under high and steep endslope conditionsDeep mining has become the normal state of coal mining; compared with the mine with shallow buried depth, the consequent high level of in situ stress and complex distribution have brought severe threats to the stability of the stope and the surrounding rock of the roadway In this research, taking the working face of Kouzidong Mine as Effect of Advancing Direction of Working Face on Mining Stress
A mathematical model for optimization and decisionmaking of
In theory, numerous technical mining schemes are available during the simultaneous extraction of coal and CBM in coal mining faces As demonstrated in Fig 2, in a coordinate system that integrates time, coal resources and CBM resources, any curve represents an exploitation scheme, and the coordinated degree of exploitation The optimal extraction site of a highposition “Optimized design and analysis of high suction roadway arrangement,” Coal Mining Technology, vol 15, no “Reasonable position determination of highlylocated gas drainage roadway of longwall panel 12070 in Shoushan no 1 coal mine,” Journal of Henan Polytechnic UniversityDetermination of Optimal Extrication Location of High Extraction
Wide stall mining for optimal recovery of coal from a thick seam
During extraction of complete thickness of a thick coal seam in a single lift in MD, nature of roof plays an important role An increase in height of extraction for maximum coal recovery from a thick coal seam damage the design of different geotechnical structures including support system,24 movement of overlying roof strata,25,26 stability In openpit mining, extraction first creates a bench to perform “Application of an integrated decisionmaking approach based on FDAHP and PROMETHEE for selection of optimal coal seam for mechanization; A case study of the Tazareh coal mine complex, Iran,” International Journal of Mining and GeoEngineering, vol 53,Analysis of Environmental Costs’ Effect in Green Mining
(PDF) Thick Coal Seam Mining Challenges and Prospect
This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL) Review shows the required engineering for extraction of thick seams needs to beFrom this, the primary equipment and key production technologies were determined for the proposed softrock protective seam mining Finally, in combination with the optimal arrangement of the working face, the pressurerelief gas extraction technology accomplished the pressurerelief mining of the protected coal seam 2Key technologies and engineering practices for softrock
Study on Optimization of Coal Truck Flow in Open
A semicontinuous process system consisting of a singlebucket excavator, truck, crushing station, and belt conveyor is the main coal mining process system of a largescale hard coal openpit mine The highintensity mining area (previously mined area of Ili No4 Coal Mine) has the worst ecological environment quality, followed by the coal reserve area of Ili No4 Coal Mine and the plannedEvaluation of ecoenvironmental quality for the coalmining
Underground mining of thick coal seams ScienceDirect
International Journal of Mining Science and Technology Volume 25, Issue 6, November 2015, Pages 885896 Underground mining of thick coal seams Selection of a suitable mining method for extraction of a thick coal seam with optimal recovery and safety is an extremely delicate processThis study investigates multiple types of water resources in the western mining area in China, their supplydemand balance by using the same dimension gray recurrence dynamic model GM (1, 1), andWater Resources Utilization and Protection in the Coal Mining
Shortterm Underground Mine Planning A Review University of
are discussed The studies reveal a deficiency of research based on the type of mining methods and incorporation of uncertainties 1 Introduction and scope of the work Mining is related to a series of operations that result in the extraction of materials from an orebody that is situated in a shallow deep up to a deep level from the surface4 Results and Discussion 41 Extraction of Factors Influencing Gas Outburst The mechanism of gas outburst in the working face is complicated, which is the result of a combination of factors such as geostress, coal seam gas, and physical and mechanical properties of the coal body Based on the historical data of gas outburst Gas Outburst Prediction Model Using Improved Entropy
Optimal coal discharge of hydraulic cutting inside coal seams for
Too much or too little coal discharge is not optimal, Conversely, the gas extractionbased concentration and flow increased 10 and 6fold, respectively, 02 Jan 2016International Journal of Mining, Reclamation and Environment Liu Considering ground instability problems of underground coal mines at shallow covers, this paper reviews and describes problems of optimal extraction of coal stuck below surface/subsurface constraints at Indian coal fields Importance of thickness and quality of interburden between the working horizon and surface/subsurface Optimal Underground Extraction of Coal at Shallow Cover
Research and practice of intelligent coal mine technology systems
312 Construction of intelligent coal mine knowledge map Through the establishment of information entities, the mapping from the physical space to the digital space is realized This mapping includes not only physical entities (eg, coal mining machines, hydraulic supports, and tunneling machines), but also time entities (eg, roof It is important that the strategic mine plan makes optimum use of available resources and provides continuous quality ore to drive sustainable mining and profitability This requires the development of a wellintegrated strategy of mining options for surface and/or underground mining and their interactions Understanding the current tools and Mining Free FullText A Review of Models and Algorithms for