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Qingming Long

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Articles

Research on Grading Evaluation of Coal and Gas Dynamic Disasters Based on Fuzzy Mathematics

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By Guangcai Wen, Qingming Long, Yong Chen, Jiaokun Wu
| MDPI
1. Introduction Coal mining continues to be the cornerstone of energy utilization in China. In 2023, the nation’s total raw coal production reached 4.71 billion tons, with Guizhou and Yunnan provinces in Southwest China contributing 4.70% to the national output [1,2]. Although this proportion is relatively low, Southwest China ranks among the regions that are the most significantly impacted by coal and gas dynamic disasters (CGDDs).
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Application of Isotope Geochemistry in Determining the Extraction Ratio of Target CBM from Multi-Seams

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By Guangcai Wen, Qingming Long
| MDPI
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
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