Coal mining reclamation as an environmental recovery …

A new approach to reclamation, such as eco-habitat, is important to obtain optimal social, economic, and ecological benefits. ... Coal mining reclamation as an environmental recovery effort: a ...

Pillar Extraction

Longwall mining or coal pillar extraction by any other method causes the roof to subside and the floor to heave. The "gas emission space" created by such coal extraction can extend 1000 ft above and 250 ft below the working seam depending on the width of the panel. Any coal seam contained in the gas emission space will release gas contained ...

Breaking law of overburden rock and key mining technology …

The diversity of coal mining conditions in China, as well as the limitations imposed by historical mining levels, have resulted in a large amount of residual coal resources 4,32,33,34.The safe and ...

Risk management of underground coal pillar extraction in …

Pillar extraction practices in South Africa have consumed a significant proportion of safety and fatality statistics in relation to its relative output (less than 5% of total South African coal production) and as a result research was undertaken in local pillar extraction operations and extended to similar operations in New South Wales ...

Open Pit Mining

Open pit mining method is one of the surface mining methods that has a traditional cone-shaped excavation and is usually employed to exploit a near-surface, nonselective and low-grade zones deposits. It often results in high productivity and requires large capital investments, low operating costs, and good safety conditions. The main …

Examining the optimum panel pillar dimension in longwall …

In Turkey and globally, the extraction of coal seams is frequently conducted through the utilization of longwall method. According to 1, longwall mining is an exploitation method commonly applied ...

Comparison of Coal Reserve Estimation Methods, Case Study …

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 …

Determination of Optimal Extrication Location of …

Determining the optimal extrication location of the high extraction roadway can improve the gas extrication effect of highly gassy mine and solve the problem of gas concentration overrun at the upper corner, …

Wide stall mining for optimal recovery of coal from a thick …

The conventional method of mining for optimal coal extraction under such geo-mining conditions is splitting and stooking. The formation of stooks during the optimisation of recovery causes a considerable drop in strength of the natural support which is not desirable for long term stability of the underground mining and surface structures.

approach for underground coal pillar extraction in South …

Analysis for pillar extraction potential (A-PEP) is an intelligent tool, which could be used as a preliminary output indicator when considering the secondary extraction of regional support pillars in the Witbank and Highveld coalfields of South Africa. The safe and economic extraction of underground coal pillars is of paramount

Improving the process of coal extraction based on the …

For the effective operation of coalfields, it is necessary to solve a number of issues that are associated with the justification of rational operation of the stoping equipment, increase …

Improving Open-Pit Mining Mapping Accuracy in the Tropics …

Study Area. The study area is situated in the Central Bangka Regency, which is part of the Bangka Belitung Islands Province in Indonesia (Fig. 1).This region is known for its extensive mining operations, particularly tin extraction through open-pit mining techniques (ESDM, 2020).Given the high likelihood of finding open mining sites …

Ultimate Pit Limit Optimization Methods in Open Pit Mines: …

Abstract Ultimate pit limit optimization plays a major role in the mining industry as it serves as the elementary foundation of all the activities in mine planning. This paper reviews and documents some methods used in ultimate pit limit optimization and gives a clear insight of these algorithms, their functionalities and limitations to open up …

Extraction of open-pit mining area based on optimal scales …

To reduce time of extraction, taking laterite nickel as an example, we proposed a remote sensing extraction strategy of ground objects information in open-pit …

ITSMART: Jurnal Teknologi dan Informasi

To make strategic decisions, The company analyzes the information on trades data. The data used in this study were coal trade data PT Global Bangkit Utama from January …

Mining | An Open Access Journal from MDPI

Mining is an international, peer-reviewed, open access journal on mining science and engineering published quarterly online by MDPI.. Open Access — free for readers, with article processing charges () paid by authors or their institutions.; High Visibility: indexed within Scopus, GeoRef, AGRIS, and other databases. Rapid …

(PDF) Cajuput (Melaleuca cajuputi (L.) Powell) Oil Yield and …

Cajuput (Melaleuca cajuputi) has the potential to be developed with monoculture and agroforestry patterns in ex-coal mining land. This study aimed to analyze the oil yield and cineole content of ...

High-efficiency and precision gas extraction in intelligent …

Article history. Views. Share. Tools. As intelligent mining operations evolve, stringent standards for gas management and extraction are imperative. To mitigate the …

Optimizing Digging Equipment Productivity Using Overall …

Coal companies have an overburden stripping production target of 95,000 bcm in January 2022, while the realization of production with the Sumitomo SH 350 LHD excavator and Zaxis 350 H excavator is only 77,000 bcm or 82% of the production target. The purpose of this study was to obtain an analysis of the productivity of the Sumitomo SH …

Open Pit Mining

Mining and milling. Markus H.A. Piro, Ksenia Lipkina, in Advances in Nuclear Fuel Chemistry, 2020 8.2.3.1 Open pit mining. Open pit mining refers to mining directly on the ground surface, thereby producing an open pit. This method is practical and cost-effective when the uranium ore is located near the surface (e.g., within 100 m). Underground …

The analysis and application of granular backfill material to …

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 …

Investigation of Humate Extraction from Lignites

The promising results with over 80% humate extraction were achieved for the Yatagan lignites when the acid–coal consumption ratio was less than 1 mL concentrated nitric acid per 1 gram coal at a pH of 9 with mixing for 48 hours, while Malkara lignites reached 70% humate extraction with 72 hours of mixing under the same …

Selecting the Optimal Borehole Drilling Pattern for Methane …

The emission of gas from the coal seams is one of the most important issues during the underground coal mining operation. Each year, coal gas emission from the underground stopes leads to the death of a large number of miners and is one of the biggest threats to workplace safety. In addition, ventilating and releasing coal gas …

Improving the process of coal extraction based on …

Regularities of forming technological schemes of coalfield operation with a given level of performance, taking into account the relationship between technological parameters of mining face,...

A review on existing opencast coal mining …

Mining equipments such as draglines, dredgers or bucket wheel excavators, trucks and shovels, and dozers are the main equipments employed for overburden removal and coal extraction.

Optimal Underground Extraction of Coal at Shallow Cover …

SummaryConsidering 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 constraints …

Innovation in the Mining Industry: Technological …

Innovation plays a critical role in the mining industry as a tool to improve the efficiency of its processes, to reduce costs, but also to meet the increasing social and environmental concerns among communities …

Open-Pit Mining Area Extraction Using Multispectral Remote …

In the era of remote sensing big data, the intelligent interpretation of remote sensing images is a key technology for mining the value of remote sensing big data and promoting a number of major applications, mainly including land cover classification and extraction. Among these, the rapid extraction of open-pit mining areas plays a vital …

Optimal scale extraction of farmland in coal mining areas …

Two methods-i.e., sample-based, object-oriented extraction and feature combination-based hierarchical extraction-were used to extract farmland information …

Mining footprint of the underground longwall caving …

The coal seals in these two mining regions have features of considerable mining height and coal recovery rate, resulting in significant surface subsidence. Further study showed that the damaged sections of the special railway line for the coal mine, Suiyong Highway, cargo highway, and riverbanks of Wangyin River, Caogou River, and …

optimal extraction for coal mining jurnal

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 …

Estimation of Optimum Line of Extraction for Continuous …

Roadheader applications in mining and tunneling …

excavation of coal in the early 50s. Today, their application areas have expanded beyond coal mining as a result of continual performance increases brought about by new technological developments and design improvements. The major improvements achieved in the last 50 years consist of steadily increased machine weight, size and cutterhead …

Study of the Dynamic Development Law of Overburden …

Coal is asignificant source of energy 1,2,3, but the production process is often disastrous.It is very important for the mining face pressure control and the horizon selection of high- and low ...