Sponsor(s): China Coal Society
12 issues per year
Current Issue: Issue 02, 2019
Journal of China Coal Society, the 1st in the field of mining engineering, promotes the development of coal theory and practice, as well as academic exchanges at home and abroad to accelerate the transformation from scientific research to real productive forces. It is supervised by China Association for Science and Technology and sponsored by China Coal Society. Launched in 1964, it aims at providing key topics of coal scientific research and mining development. Its scope covers coal geology, geochemistry, geophysics, mineralogy and coal seam formation and evolution; petrophysics of coal; organic matter-rich shales, including mineralogy, formation, transport and storage of gases in coal and shales; unconventional energy systems (e.g. oil shales, shale gas, and other carbon-based fuels); ore deposits of materials and rare metals in coal and coal-bearing strata; and groundwater management. The journal is included in CA, JST, EI, CSCD.
Fan Baoying, Xu Shengyang, Zhu Shuangcheng
Journal of China Coal Society,2019,Vol 44,No. 02
In this paper, a scientific idea was proposed, i.e., the intelligent coal mine is the core technology support for the coal industry development. The definition and general requirements of the intelligent coal mine were expounded. The development goal of the intelligent coal mine is to build a smart coal mine. The connotation and relationship of coal mine intellectualization, wisdom, informatization and digitalization were analyzed. Also, the construction principles and goal of the intelligent coal mine were proposed. The top-layer design of intelligent coal mine was carried out, and the ideas of the integrated planning development mode of the intelligent coal mine, the scientific design on the overall framework of the intelligent coal mine, and the construction of 100 intelligent demonstration coal mines were put forward. In addition, the main development routes of intelligent coal mine were discussed including the precision geological exploration and 4D-intelligent GIS system of underground coal mine, the intelligent development plan and the mining face design, the intelligent roadway rapid drivage technology, the intelligent technology of fully mechanized coal face, the intelligent main/auxiliary transportation technology, the hazard sources intelligent sensing and early warning technology, the intelligent washing system, the intelligent comprehensive support technology, and the comprehensive control system and operating platform of mine Internet of things. Furthermore, the development direction of the intelligent open-pit coal mine was expounded. The development ideas of constructing the informatization system of an open-pit coal mine, developing the intelligent continuous mining technology of open-pit coal mine, establishing the integrated space-air-ground safety warning system in an open-pit coal mine, and promoting the coordinated green development of ecological environment in an open-pit coal mine were put forward. It is important to vigorously develop intelligent manufacturing of coal mining equipment, and to improve the reliability and adaptability of coal mining equipment, thus promoting the robotized substitution of coal resource development, and providing intelligent equipment support for intelligent development of coal mining. Some policy suggestions were put forward, such as increasing policy support for intelligent development of coal mine, setting up special projects for the intelligent standard system construction of coal mine, and establishing a national experimental platform for the intelligent technology innovation of coal mine.
Bubble-particle attachment science: advances and dilemma in bubble-particle attachment on a macroscopic scale
Journal of China Coal Society,2019,Vol 44,No. 02
Bubble-particle attachment refers to the process from the time when the particles encounter the bubble to the film thinning and rupture, and finally to the three-phase contact line (TPC) spreading and the formation of a stable mineralized gas floc, which is the key process in flotation. However, the underlying mechanism for bubble-particle attachment is not well understood. The attachment process is mainly influenced by the physical and chemical properties of particle and bubble, and the chemical conditions of the solution. The thinning rupture behavior of the thin liquid film between bubble and particle is controlled by the synergistic effect between surface force and hydrodynamic force. The deformation of gas-liquid interface further increases the complexity of the system, making the theoretical research and experimental exploration of bubble-particle attachment challenging. Early studies on attachment have been mainly focused on attachment probability. The induction time test on a macroscopic scale is dominant, and the attachment probability can be calculated based on the induction time result. A comprehensive review of the current bubble-particle attachment probability models and the existing technical bottlenecks was carried out. The existing technical bottlenecks and limitations were also analyzed. Experimental techniques such as the induction timer and high-speed visualization have significantly contributed to a better understanding of bubble-particle attachment. It has been demonstrated that the induction time correlates well with flotation recovery. However, surface forces and film drainage information between bubble and particle could not be identified, leading to that the fundamental adhesion mechanism could not be revealed by macroscopic induction time. It is an inevitable trend of the development of technology to measure the interaction force between bubble and particle and to measure the thinning dynamics of the thin liquid film on a nanometer scale. It can shed new light on the flotation micro-mineralization process, and also provide theoretical support for the flotation intensification of difficult-to-float coal and refractory ore.