A Review on the Types, Performance and Environmental Protection of Filling & Plugging Materials for Prevention and Control of Coal Spontaneous Combustion in China

ABSTRACT

Coal spontaneous combustion (the term is hereafter abbreviated as CSC) is an important problem facing by China to achieve carbon peak and carbon neutrality. CSC affects the mining process of mining for a long time, not only causing a large amount of waste of coal resources, but also severely destroying the ecological environment. At present, filling & plugging materials (the term is hereafter abbreviated as F&P materials) is widely welcomed and developed rapidly because of its advantages of wide application, obvious performance and low price. Based on the research of the prevention and control of CSC and the materials applying for it, this paper creatively puts forward an application system of materials used for the prevention and control of CSC. The types of F&P materials are systematically summarized. According to the form of materials, the F&P materials are divided into slurry, colloid and foam. The performance and effect of three kinds of F&P materials are analyzed in detail. On this basis, the cost and environmental protection characteristics of F&P materials in China were compared and evaluated. Finally, this paper predicts the development of F&P materials. This paper provides an effective reference for Chinese coal mining enterprises to select suitable F&P materials, which is of great significance for the prevention and control of CSC and environmental protection.

KEYWORDS:

• Coal spontaneous combustion
• filling and plugging
• material cost
• environmental performance

Acknowledgments

This research was jointly supported by the National Natural Science Foundation of China (51904172), the China Postdoctoral Science Foundation (2020M682209), the Research Fund of Key Laboratory of Safe and Effective Coal Mining (Anhui University of Science and Technology), Ministry of Education (JYBSYS2020102), the Natural Science Foundation of Shandong Province (ZR2019QEE041)，the Qingdao West Coast New Area Science and Technology Benefiting People Project (2019-109). We also wish to thank Wisharing Editorial Services for improving the language of this paper.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Competing interests

The authors have no relevant financial or non-financial interests to disclose.

Availability of data and materials

Data sharing not applicable to this article as no datasets were generated or analyzed during the current study.

Authors contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Huimin Cao, Xiaolei Sun, Xiangming Hu, Jinliang Li, Jinhu Li and Biao Kong. The first draft of the manuscript was written by Wei Lu and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Ethical approval

This article does not involve any ethical issues.

Consent to participate

All coauthors of this article have participated in the research of this paper.

Additional information

Funding

The work was supported by the China Postdoctoral Science Foundation [2020M682209]; National Natural Science Foundation of China [51904172]; Research Fund of Key Laboratory of Safe and Effective Coal Mining [JYBSYS2020102]; Natural Science Foundation of Shandong Province [ZR2019QEE041].