Results 91 to 100 of about 370,321 (357)

Key technologies of coal mine roadway adaptive dust cleaning robot

Meitan kexue jishu
In response to the problems of low automation levels, high water consumption, and poor effectiveness of dust cleaning in coal mines, a roadway dust cleaning robot is developed.
Huaiwei REN, Zhifeng WANG, Jie ZHOU, Shijun LI, Ziyan MA, Shuji ZHAO, Ming DU, Guoqing LI   +7 more
doaj   +1 more source

Corrosion effect of hydrochloric acid on the granite: Insights from electrical conductivity, mineral composition, and tensile behavior

Deep Underground Science and Engineering, EarlyView.
The evolution of electrical conductivity, mineral composition, and tensile behavior such as peak strength, average stiffness, and the energy evolution of the granite specimen under different HCl conditions are studied, analyzed as well as quantified, and investigated, respectively.
Yanan Gao, Yikang Cheng, Guanglei Cai, Yuan Gao, Jianwei Tian, Mingzhong Gao   +5 more
wiley   +1 more source

Energy and precious fuels requirements of fuel alcohol production. Volume 4: Appendices G and H, methanol from coal [PDF]

Coal mine location, mining technology, energy consumption in mining, coal transport, and potential availability of coal are discussed.
Back, G., Reddy, T. S., Weinblatt, H.
core   +1 more source

Optimal selection test of material ratio in the top of Ordovician limestone grouting reconstruction

Meitan kexue jishu
It is an effective method to reduce the risk of floor water inrush by grouting reconstruction and sealing of water channel on top of Ordovician limestone before deep confined water mining in Huabei type coal mine in China. The basic properties of fly-ash
Zhenli FAN, Lutong CAO, Fengda ZHANG, Xiwen YIN, Qiuyang ZHAO, Zhiwei ZHANG   +5 more
doaj   +1 more source

Experimental study on dynamic behavior analysis of coal and its acoustic emission response characteristics under impact failure

Deep Underground Science and Engineering, EarlyView.
Based on acoustic emission response characteristics, it can be more accurate to identify the damage evolution process of coal under the combined dynamic and static loads, reveal the moment corresponding to coal damage, and identify the characteristics of coal failure. The research results are conducive to the further use of acoustic emission monitoring
Wei Zhang, Huijian Fu, Yingke Liu, Zhaoxi Long, Yang Liu, Tengrui Yang, Yanbo Sun, Mingjun Jiang, Xiaojiang Wen, Yue Niu, Ruixi Cheng   +10 more
wiley   +1 more source

Research on intelligent conveying technology of 500 m ultra-long face scraper

Meitan kexue jishu
In the field of medium and thick coal seam mining, intelligent mining of ultra-long face is the development trend of coal mining technology, and intelligent transportation is an important part of it.Based on the summary of the problems of the scraper ...
Weixiu CUI, Runqing MU, Hongzhang XIE, Shiyuan YAN   +3 more
doaj   +1 more source

Stress analysis of crack characteristic of anthracite under dynamic loading

Deep Underground Science and Engineering, EarlyView.
In this article, the dynamic compression test of anthracite under five strain rates is carried out, the evolution law of three kinds of crack characteristic stress is analyzed, and a prediction model of the crack characteristic stress threshold considering the strain rate effect is established. Then, the rationality of crack characteristic stress under
Yun Bai, Feng Gao, Ning Luo, Zhizhen Zhang, Yue Niu, Shanjie Su   +5 more
wiley   +1 more source

Cartels, managerial incentives, and productive efficiency in German coal mining, 1881-1913 [PDF]

In this paper, we evaluate the impact of cartelisation and managerial incentives on the productive efficiency of German coal mining corporations. We focus on coal mining in the Ruhr district, Germany’s main mining area.
Carsten Burhop, Thorsten Luebbers
core  

Slit tube responses and rock fracture characteristics in slit charge blasting under high in situ stress

Deep Underground Science and Engineering, EarlyView.
In this article, the finite element method‐smoothed particle hydrodynamics adaptive coupling algorithm is applied to numerically simulate and analyze the dynamic response of the slit tube and the crack propagation under high in situ stress. The dynamic response of the slit tube mainly exhibits radial response in the vertical direction of the slit and ...
Zhe Sui, Liyun Yang, Lijun Wu, Chenxi Ding   +3 more
wiley   +1 more source

Failure Mechanism for Surrounding Rock of Deep Circular Roadway in Coal Mine Based on Mining‐Induced Plastic Zone [PDF]

, 2018
Yue Yuan, Weijun Wang, Shuqing Li, Yongjian Zhu   +3 more
openalex   +1 more source