optimal extraction for coal mining jurnal

The opencast coal mining has poten tial impact on landform. It causes large scale land subsidence due to. exte nsiv e excavation, removal of top soil, dumping of solid waste, cutting of roads and ...

Several articles have confirmed the social and environmental consequences of opencast coal mining. 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 monetary costs that occur in the Mining District (located in the central part of …

The host rocks are sandstone subordinated by siltstone. Most seams have a well consistent operating thickness of 0.70–5.00 m. coal mining is carried out in seam 48 of an average thickness of 1.84–2.65 m. The design capacity of the mine is 3 Mt per year. The mining system is longwall top coal caving (LTCC).

Subsidence data acquisition methods are crucial to mining subsidence research and an essential component of achieving the goal of environmentally friendly coal mining. The origin and history of the existing methods of field monitoring, calculation, and simulation were introduced. It summarized and analyzed the main applications, flaws and …

1. Introduction. Territory spatial planning is the spatial and temporal arrangement for land development and protection (Liu and Zhou, 2021).In 1983, spatial planning was adopted by Europe (Albrechts, 2004, 2006).Spatial planning can promote multi-planning integration and achieve established planning goals (Liu and Zhou, …

The exploitation of natural resources remains a common practice in many countries to stimulate economic growth, and coal is the most commonly exploited resource. However, the mining process often causes environmental disturbance. Therefore, this research was conducted to analyze the ideal implementation of coal mine reclamation in …

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 inter-burden between the working horizon and surface/subsurface …

Method of extraction is one of the keys and underrated parameters, which plays an eminent role in successful depillaring in underground coal mining. This chapter highlights the underground coal …

So it is expected to find the optimal trajectory of industrial development to prevent irreversible problems in the biosphere that could stop progress of civilization. ... the German coal mining ...

Dragflow has supplied a new (DRH85/160E22DFHD) dredge to a client in Central Africa for mineral extraction from a river. After extraction, the materials (mainly silt and sand) are sent to a washing plant to separate mineral matter from other inerts. Since dredging depth is about 50m, the dredge is provided with a hydraulic spooler with an ...

Therefore, this study demonstrates that at a segmentation scale of 44, the hierarchical extraction method based on feature combination not only accurately …

Besides, the amount of coal mining that can be produced is primarily determined by the mine design, especially the optimal slope as a basis for mining pits in the coal extraction.

Besides, the amount of coal mining that can be produced is primarily determined by the mine design, especially the optimal slope as a basis for mining pits in the coal extraction. This research aims to estimate coal reserves based …

Optimal selection of coal seam pressure-relief gas extraction technologies: a typical case of the Panyi Coal Mine, Huainan coalfield, China: Energy Sources, Part …

Therefore, in light of the specific coal mining face and based on the optimal control algorithm via adaptive dynamic programming (ADP), this paper develops a new online adaptive learning ...

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 monetary costs that …

Optimal scale extraction of farmland in coal mining areas with high groundwater levels based on visible light images from an unmanned aerial vehicle (UAV) Research Article. Published: 06 August 2020. Volume 13, pages 1151–1162, ( 2020 ) Cite this article. Download PDF. Xiao … See more

Method of extraction is one of the keys and underrated parameters, which plays an eminent role in successful depillaring in underground coal mining. This chapter highlights the underground coal ...

The large-scale extraction of coal resources in the western mining areas of China has resulted in a significant loss of water resources, which is a challenge for coordinating resource extraction with ecological preservation in the mining areas. Although underground reservoir technology can effectively solve this problem, measuring …

The redemption of Rare Earth ElementsRare earth elements from coal ashCoal ash has multifarious advantages in the utilization of waste and also as a way to minimize unnecessary mining. There is a significant escalation in the quantity of coal ash production, as well...

3.2.3 Continuous Mining. Continuous extraction and material handling systems have been used for many years in the coal mining industry. In surface operations, this has been carried out combining the action of bucket wheels excavators for the extraction and conveyor belt systems for the transport of coal and waste.

A semicontinuous process system consisting of a single-bucket excavator, truck, crushing station, and belt conveyor is the main coal mining process system of a large-scale hard coal open-pit mine. …

According to statistics, in 2018, there were about 450 open-. pit coal mines in China. e production scale of the largest. open-pit coal mine was 35 million tons/year, and over 20. large-scale open ...

Safety. Room and pillar mining. Ore recovery. 3D numerical modeling. abstract. This paper presents an optimization methodology for the geometric configuration of a room–and–pillar. mining ...

The occurrence and mining conditions of underground coal seams become more complex with increasing mining depth, making mining gas extraction more and more problematic (Chen et al. 2020; Wang et al. 2021a, b).Gas extraction efficiency directly depends on the coal seam permeability, which, in turn, is controlled by several internal …

This article deals with reliability analysis of mining equipment such as shovels and dumper in a surface coal mine at The Singareni Collieries Co. Ltd., Telangana, by using the RBD and Markov model. First, the method is to obtain the MTBF and failure rate of the individual subsystem of a shovel and each dumper using RBD. Second, the …

In fact, within most Indian coalfields, a large number of coal seams extract only 15-20% of coal, but no pillar extraction is done due to the presence of surface or sub-surface structures leading ...

Comparison of Coal Reserve Estimation ... - jurnal.ugm.ac.id. Besides, the amount of coal mining that can be produced is primarily determined by the mine design, especially the optimal slope as a basis for mining pits in the coal extraction. This research aims to estimate coal reserves based on existing pit designs using a variety of methods.

Plan view of wide stall formation at Umaria colliery Optimal Underground Extraction of Coal 441 5.4 Strata Movement Study To evaluate the performance of the stall formation in the field, different parameters like mining-induced stress, roof to floor convergence, load on support, surface subsidence, etc. were monitored during the workings.

The results showed that: factors affecting the gas extraction efficiency of the correlation between high and low aperture drilling, borehole spacing, and extraction from …

A Life Cycle Assessment study aimed at identifying the environmental impacts of a coal mining process has been carried out. The scope of the process includes land clearing to coal barging (cradle to gate). The functional unit used is the production of 1 ton of coal. The inventory data in this research is site specific, collected from a mining …

In China's northwest coal mining area, the excavation of shallow buried thick coal seams has caused serious damage to the phreatic water layer and induced deterioration of the ecological environment. Backfilling is a basic method of controlling the loss of groundwater and reducing surface subsidence. In order to reduce the porosity of …