Abstract detail - The 9th International Conference on Energy, Resources, Environment and Sustainable Development (ERESD 2022)

ID / Created Time

127 / 2022-01-21 18:52:12

Title

Paradigm of ultra-deep injection and storage approach for reducing deep mine water surface drainage at coal mine areas

Keywords

Deep mine water; Water quality characteristics; Ultra-deep injection and storage; Surface drainage reduction

Track/Subject

Resource Development and Utilization > 11. Mine Water Hazard, Pollution Prevention and Control, and Utilization of Mine Water Resources

Status

Draft Paper Accepted

Author

Xin Li / China University of Mining and Technology；School of Resources and Geosciences

Yajun Sun / School of Resources and Geosciences, China University of Mining and Technology

Zhimin Xu / School of Resources and Geosciences, China University of Mining and Technology

Ge Chen / School of Resources and Geosciences, China University of Mining and Technology

Qi Liu / School of Resources and Geosciences, China University of Mining and Technology

Abstract

Mining activities inevitably produce enormous mine water drainage result in many problems in China’s mine areas, such as poor water quality, high-cost water treatment, improper disposal approaches. This paper investigated the characteristics of mine water quality for seeking low-cost mine water treatment approaches and reducing deep mine water surface drainage (DMWSD). High concentration of conventional components is the main factor causing poor deep mine water quality, and the contents and proportions of toxic and harmful substances in mine water are lower than our imagination, more than 70% coal mines have better water quality than groundwater class III standard in China. We compared the differences between deep mine water quality and acid mine drainage (AMD) and pointed out the types of mine water that can be treated by ultra-deep injection and storage (UDIS), such as acidulous, alkalescent and high TDS types deep mine water. The technological framework of UDIS was established in this paper, and some technical and scientific questions of UDIS were proposed. Then the rationality, effectiveness and feasibility of UDIS technology were certified by a in situ UDIS project in Ordos Basin, China. Finally, we proposed some theory and technology bottlenecks of the UDIS approach. The UDIS technology will be of great significance to protecting water resources and sustainable environment of water dynamic, ecology and chemistry, and it provides a typical paradigm for reasonable DMWSD reduction at mine areas.