Hunan Provincial Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines

Changsha, China

Hunan Provincial Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines

Changsha, China
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Li X.-B.,Central South University | Li X.-B.,Hunan Provincial Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines | Zhou J.,Central South University | Zhou J.,Hunan Provincial Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines | And 4 more authors.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2017

Based on the current situation of deep resources exploitation at home and abroad and its research achievements, the division and difference of the deep from industry and academy around the world were summarized in this work. The definition and the critical depth of deep mining for solid mineral resources and its mining modes were also discussed. Then, some new strategies and/or alternatives on deep mining for solid mineral resources were proposed for deep hoist & transportation, and temperature control of deep mining, etc.. Lastly, incorporating with the characteristics of high stress, great lifting depth and high temperature in deep hard-rock mines, a new strategy and mining mode which can be "convert harm into benefit" were given for the deep rare, valuable and strategic resources exploitation. © 2017, Science Press. All right reserved.


Li X.,Central South University | Li X.,Hunan Provincial Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines | Yin T.,Central South University | Yin T.,Hunan Provincial Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines | And 6 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

With the self-developed dynamic disturbance test system coupling with temperature and pressure, laboratory experiments were conducted to investigate the dynamic strength of siltstone under temperatures from 20°C to 300°C and different axial pressures. The effects of temperature and pressure on the dynamic strength of siltstone are discussed. The results show that: (1) When the temperature is 20°C-100°C, the dynamic peak strength of siltstone increases with the increase of temperature. However, the strength of siltstone decreases with the increase of temperature during the temperature over 100°C. (2) At the same temperature and different axial pressures, the dynamic strength of siltstone increases rapidly with the increase of axial pressure initially. When the axial pressure is up to 45 MPa, the dynamic strength decreases with the increase of axial pressure. And the higher the axial pressure is, the larger impact failure strength decrease is.

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