中国矿业大学(北京)地球科学与测绘工程学院

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Ecological-Based Mining: A Coal–Water–Thermal Collaborative Paradigm in Ecologically Fragile Areas in Western China
 
2025年05月27日 15:52:24
 

Liu, XX (Liu, Xiaoxiu) [1][2] ; Zeng, YF (Zeng, Yifan) [1][2][3] ; Wu, Q (Wu, Qiang) [1][2][3] ; Meng, SH (Meng, Shihao) [1][2] ; Liang, JY (Liang, Jiyue) [1][2] ; Hou, ZP (Hou, Zhuping) [1][2]


[1] National Engineering Research Center of Coal Mine Water Hazard Controlling, China University of Mining and Technology, Beijing 100083, China.

[2] College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China.

[3] University of Mining and Technology (Beijing) Inner Mongolia Research Institute, Ordos 017000, China.



Original publication

Liu X, Zeng Y, Wu Q, Meng S, Liang J, Hou Z (2024b) Ecological-Based mining: A Coal-Water-Thermal collaborative paradigm in ecologically fragile areas in Western China. Engineering 38:209-222. https://doi.org/10.1016/j.eng.2024.01.019

Abstract

A substantial reduction in groundwater level, exacerbated by coal mining activities, is intensifying water scarcity in western Chinas ecologically fragile coal mining areas. Chinas national strategic goal of achieving a carbon peak and carbon neutrality has made eco-friendly mining that prioritizes the protection and efficient use of water resources essential. Based on the resource characteristics of mine water and heat hazards, an intensive coalwaterthermal collaborative co-mining paradigm for the duration of the mining process is proposed. An integrated system for the production, supply, and storage of mining companion resources is achieved through technologies such as roof water inrush prevention and control, hydrothermal quality improvement, and deep-injection geological storage. An active preventive and control system achieved by adjusting the mining technology and a passive system centered on multi-objective drainage and grouting treatment are suggested, in accordance with the original geological characteristics and dynamic process of water inrush. By implementing advanced multi-objective drainage, specifically designed to address the skylight-typewater inrush mode in the Yulin mining area of Shaanxi Province, a substantial reduction of 50% in water drillings and inflow was achieved, leading to stabilized water conditions that effectively ensure subsequent safe coal mining. An integrated-energy complementary model that incorporates the clean production concept of heat utilization is also proposed. The findings indicate a potential saving of 8419 t of standard coal by using water and air heat as an alternative heating source for the Xiaojihan coalmine, resulting in an impressive energy conservation of 50.2% and a notable 24.2% reduction in carbon emissions. The ultra-deep sustained water injection of 100 m3·h1 in a single well would not rupture the formation or cause water leakage, and 7.87 × 105 t of mine water could be effectively stored in the Liujiagou Formation, presenting a viable method for minewater management in the Ordos Basin and providing insights for green and low-carbon mining.

Graphical abstract

Keywords

Dual carbon targets; Coal-water-thermal co-mining; Ecologically fragile areas; Mine-water control; Resource utilization


 
 

中国矿业大学(北京)地球科学与测绘工程学院

校址:北京市海淀区学院路丁11号 邮编:100083