Does de-capacity policy promote the efficient and green development of the coal industry? –Based on the evidence of China

Zhang, Rui; Qie, Xiaotong; Hu, Yanyong; Chen, Xue

doi:10.1016/j.resourpol.2022.102717

Cited by 18 publications

(10 citation statements)

References 32 publications

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“…It is well known that most countries face resistance to phasing out coal [39,40], and our research shows that phasing out coal has significant carbon reduction benefits, particularly in the coal mining phase. Further and stronger coal phase out policies could be a key contributor to China's carbon peaking and carbon neutrality [14,23,41].…”

Section: Discussionmentioning

confidence: 99%

“…We also provide a case for empirical analysis of the increasingly important but largely neglected issue of spatial interactions in the context of SDG interactions. In addition to reductions in carbon emissions (SDG13), air pollutants (SDG12) and health co-benefit (SDG3), there are a significant number of other important environmental benefits from coal closure that are worth exploring [10,31,41,47]. A previous study found that the water resources co-benefitted from coal de-capacity in China from 2016 to 2022, only taking into consideration the avoided coal mining, and amounted to 3000 million m 3 (SDG6) [48].…”

Section: Discussionmentioning

confidence: 99%

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Co-Benefits Analysis of Coal De-Capacity in China

Cui,

Lu,

Dong

et al. 2023

Sustainability

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China is the world’s largest carbon emitter and coal de-capacity is a policy with immediate and substantial CO2 reduction effects. However, the carbon emission reduction and health co-benefits arising from the coal de-capacity are often ignored. Here, we assessed the carbon emission reductions and quantified the health co-benefits from coal de-capacity based on an analysis of the spatial and temporal distribution characteristics of the mine closures and phase out during 2016–2022. 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, 11,775 premature deaths were avoided during 2016–2022 due to reduced PM2.5 exposure as a result of coal mining. This study highlights the significant effects of coal de-capacity on carbon reduction and health co-benefits in China and provides scientific evidence and data to support the achievement of the sustainable development goals and the ‘dual carbon goals’.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Co-Benefits Analysis of Coal De-Capacity in China

Cui,

Lu,

Dong

et al. 2023

Sustainability

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“…14 This has a significant and far-reaching impact on the healthy and sustainable development of the coal industry. [15][16][17][18][19][20] Research on the remanufactured coal face revealed that the coal pillar overruns the destabilization problem existing when the remanufactured coal becomes the main source, limiting the remanufacturing efficiency and safety. The remining disturbance can trigger the redistribution of coal pillar stresses, [21][22][23] which may lead to coal pillar overrun destabilization, thus leading to a large-scale collapse of the roof of the empty lane.…”

Section: Introductionmentioning

confidence: 99%

“…Remnant coal, which is a coal resource that has not been mined temporarily for various reasons (e.g., technology and safety) in past coal‐mining processes, 12,13 is the focus in terms of how to mine remnant coal efficiently and safely to achieve the maximum utilization of resources 14 . This has a significant and far‐reaching impact on the healthy and sustainable development of the coal industry 15–20 …”

Section: Introductionmentioning

confidence: 99%

Coal pillar destabilization prediction and mining method in residual mining areas under remining disturbances

Wen,

Gong,

Zhu

et al. 2023

Energy Science & Engineering

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To address the problem of pillar instability in residual mining areas under repeated mining disturbances, the prediction of pillar instability time and mining technology is studied by using numerical simulations, theoretical examinations, and practical experimentation techniques utilizing the remaining facade of the Shenghua Coal Industry 3103. On the basis of the findings, employing a fully mechanized mining technique exerts greater pressure on the coal pillar, increasing the likelihood of plastic failure. However, adopting the segmental filling mining approach can effectively disperse this pressure, consequently mitigating potential damage to the coal pillar. Initially, the coal pillar undergoes a progressive yielding or collapsing process at its periphery, leading to instability once the area of the projectile core of the coal pillar decreases beyond a specific threshold. The dimensions of both the affected roadway and the coal pillar play a pivotal role in determining the coal pillar's load‐bearing capacity. A prediction model for pillar instability is established. If the area of the projectile core is less than 34% during remining, the mining method should be changed or pillar reinforcement should be implemented. The accurate prediction and adaptation of the model's mining approach ensure the secure extraction of coal pillars within the remaining mining region, with successful validation of the model's performance.

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“…In the Coal Industry Development Annual Report 2020, it was shown that the raw coal washing rate reached 74.1% in the past five years, which is 8.2 percentage points higher than that of 2015 [1][2][3]. A Flotation collector is a necessary reagent used in the coal flotation process, and with the increase in coal washing rate, the demand for flotation collectors in coal preparation plants is increasing [4,5].…”

Section: Introductionmentioning

confidence: 99%

Construction of a Green-Comprehensive Evaluation System for Flotation Collectors

Cui

Cao

et al. 2023

Processes

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The evaluation of flotation reagents performs an important role in the selection and green application of reagents. The green indexes and effect indexes of flotation collectors were selected by data literature method, system analysis method, mathematical model method, and qualitative and quantitative analysis method, and the green evaluation system of flotation collectors, flotation effect evaluation system, and comprehensive evaluation system of flotation collectors were established. The normalization method and expert evaluation methods were adopted to obtain the grade classification of quantitative and qualitative indicators, respectively. The analytic hierarchy process (AHP) was used to determine the weight of secondary indicators and tertiary indicators of the evaluation system and the weight of indicators at a lower level. Applying the fuzzy comprehensive evaluation (FCE), the trapezoidal function is selected to determine the index affiliation, the index system score is calculated according to the weighted average principle, and finally, the established evaluation system is applied in an example. The example application shows that the comprehensive evaluation system of flotation collectors can make a comprehensive evaluation of collectors from the aspects of the greenness of reagent, flotation effect, and cost, and it has a strong target and practicality for collectors evaluation. The establishment of the system has a guiding significance for the selection and use of flotation collectors.

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Does de-capacity policy promote the efficient and green development of the coal industry? –Based on the evidence of China

Cited by 18 publications

References 32 publications

Co-Benefits Analysis of Coal De-Capacity in China

Co-Benefits Analysis of Coal De-Capacity in China

Coal pillar destabilization prediction and mining method in residual mining areas under remining disturbances

Construction of a Green-Comprehensive Evaluation System for Flotation Collectors

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