Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Mining Engineering
Preparation Of Coal-Series Solid-Waste-Based Green Filling Materials And Their Performance, Dong Meng, Li Jiangshan, Chen Xin, Jin Jiaxu, Lu Longzhao
Preparation Of Coal-Series Solid-Waste-Based Green Filling Materials And Their Performance, Dong Meng, Li Jiangshan, Chen Xin, Jin Jiaxu, Lu Longzhao
Coal Geology & Exploration
The filling technology is an important part of green mining. The low-carbon environmental-friendly filling materials with low costs in research and development and reliable performance are critical for the development of filling technologies. The coal gangue (CG) and coal-series metakaolin (MK) were adopted as the raw materials to prepare coal-series solid-waste-base green filling materials, and the effect of the mixing proportion and alkali activator on the strength and fluidity of filling materials was discussed. In combination with the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TG) analysis and scanning electron microscopy/energy dispersive x-ray spectroscopy (SEM-EDS) and other characterization measures, …
Status And Prospect Of Harmless Disposal And Resource Comprehensive Utilization Of Solid Waste Of Coal Gangue, Wang Yutao
Coal Geology & Exploration
A large amount of coal gangue generated during coal production and processing is piled up on the surface, which not only causes land occupation and soil erosion, but also causes geological disasters such as landslides and debris flows. So it has a serious impact on the ecological environment of the mining area. The cumulative stockpile of coal gangue in China has exceeded 6 billion tons, accounting for 13000 hectares of land. In 2020, the output of coal gangue in China is 729 million tons, the comprehensive utilization is 526 million tons, and the comprehensive utilization rate is 72.2%. At present, …
Transport Mechanism Of Ammonia Nitrogen In The Simulated Gob Area Packed With Coal Gangue, Li Yusong, Lu Yucan, Cao Qiong, Zhao Li, Zhu Kaipeng, Zhang Qing, Yu Hongfei, Zhang Lei
Transport Mechanism Of Ammonia Nitrogen In The Simulated Gob Area Packed With Coal Gangue, Li Yusong, Lu Yucan, Cao Qiong, Zhao Li, Zhu Kaipeng, Zhang Qing, Yu Hongfei, Zhang Lei
Coal Geology & Exploration
In many coal mining areas in western China, waste water produced during coal mining is often dominant in mine water, resulting in high ammonia nitrogen content. The pretreatment of mine water by filling gangue in coal mine gob areas has become an important measure for the resource utilization of mine water and gangue. The research took the coal gangue from Baode Coal Mine of Shenhua Shendong Coal Group Corporation as the filling medium and the ammonia nitrogen in mine water as the research object. Based on CXTFIT2.1, column simulation experiments were carried out to study the migration mechanism of ammonia …