3. Fig. 3 illustrates the schematic map of a single coal particle during desorption and diffusion in this study. The particle is nearly considered to be spherical containing gas, which desorbs following a shirking core mechanism with a constant particle radius. To be more specific, spherical ...
Therefore, research on coal mass permeability associated with coal damage is critical to the investigation on gas outburst hazard and gas extraction in underground coal mines (Jiang et al., 2010; Palmer and Mansoori, 1996). Coal permeability undergoes dynamic changes during gas drainage from coal ...
Outline Highlights Abstract Keywords 1. Introduction 2. Analytical framework: Causes of path dependency and socio-technical lock-in 3. Case study background: climate, energy and coal policy in Japan 4. Methods 5. Findings: factors perpetuating coal power in Japan 6. Reinforcing dynamics and ...
While this area’s ecological environment has shifted from a terrestrial to a water-land composite ecosystem, it is still impacted by acid wastewater from mines, agriculture, and domestic sewage. As a result, the ecosystem’s structure and function have been severely disrupted. The present study,...
In the northern part of Ningwu Coalfield, there are mostly opencast coal mines, accompanied by the main urban area of Shuozhou city, while in the southern part there are mostly underground coal mines. These areas have frequent human activities and generally have higher NDBSI values, ICDI ...
Therefore, multiple advanced control systems have been installed in mines to ease the mining process and ensure the safety of this critical environment [3]. However, one of the major challenges in underground mines is the lack of a stable communication framework that can provide complete access ...
Tunnels are important areas for coal mine production, with most underground equipment installed in these roadways. Operating this equipment is the primary work of coal miners. With the advancement of technology, the intelligentization of coal mines has become a key means of ensuring miner safety, im...
Our findings show that China had closed/phased out a total of 4027 mines with a total de-capacity of 8.75 × 108 t, spatially concentrated in Southwest and North China from 2016 to 2022. The coal life cycle emitted 1859 million t of carbon during the coal de-capacity. Importantly, 11,...
In addition, regions adjacent to lignite mines face an unpredictable future. Therefore, the transition phase must be based on proper planning that considers the existing infrastructure and social awareness. The main objective of this study is to highlight the geospatial capabilities for geological and...