Results 31 to 40 of about 11,011,498 (241)

Study on the Slurry Diffusion Law of Fluidized Filling Gangue in the Caving Goaf of Thick Coal Seam Fully Mechanized Caving Mining

Energies, 2022
Because of the problem of gangue discharge and surface subsidence during coal mining, the current research on underground filling mainly focuses on the paste filling, solid filling, and grouting filling of the overburden separation layer after ...
Liang Li, Qingxiang Huang, Xiao Zuo, Jie Wu, Baoning Wei, Yanpeng He, Weilong Zhang, Jie Zhang   +7 more
doaj   +1 more source

A Conserved Isoleucine Gates the Diffusion of CO and O2 to the Active Site of NiFe CO‐Dehydrogenase

Angewandte Chemie, EarlyView.
A combination of protein film electrochemistry and site‐directed mutagenesis shows that isoleucine 563 (numbering of Thermococcus sp. AM4) gates the arrival of both CO and O2 to the active site of the nickel‐iron CO dehydrogenases. Mutations at this position increase the resistance to O2 at the cost of a slower reaction with CO.
Laura Opdam, Marta Meneghello, Chloé Guendon, Jade Chargelègue, Andrea Fasano, Aurore Jacq‐Bailly, Christophe Léger, Vincent Fourmond   +7 more
wiley   +2 more sources

Analysis and Engineering Practice of Factors Affecting Top-Coal Recovery in a Large Dip Coal Seam

Advances in Civil Engineering, 2022
The recovery of top coal in the caving face directly impacts the efficiency of mining coal resources. The geological conditions and mining parameters are well known to be significant influences on the recovery of top coal. This study focused on the 9-301
Xinglong Huang, Ying Chen, Yang Li, Fengshuo Jia, Shengjian Liang, Xiufeng Zhang, Yang Chen, Qianjia Hui, Zhiwen Wang, Zhaoju Zhang, Zhijie Zhu, Dequan Sun   +11 more
doaj   +1 more source

Research on the intelligent coordinated top-coal caving model and key technologies in extra-thick coal seams

河南理工大学学报. 自然科学版
ObjectivesFully mechanized top-coal caving is a safe and efficient mining method for extra-thick coal seams. However， the complexity of the caving environment， the challenges in coordinating mining and caving， and the numerous factors influencing caving ...
LI Dongyin, WANG Zuguang, WANG Shen, LI Huamin, PENG Weiping, LI Hongbin, ZHANG Guopeng, ZHANG Xuhe   +7 more
doaj   +1 more source

Prediction of the main caving span in longwall mining using fuzzy MCDM technique and statistical method

, 2018
Immediate roof caving in longwall mining is a complex dynamic process, and it is the core of numerous issues and challenges in this method. Hence, a reliable prediction of the strata behavior and its caving potential is imperative in the planning stage ...
Khaloo Kakaie, R., Mohammadi, S., Mirzaghorbanali, A., Ataei, M.   +3 more
core   +1 more source

Influence of particle characteristics on dynamic characteristics of tail beam under coal rock caving impact

Frontiers in Energy Research, 2022
In order to improve the accuracy of simulation parameters used in the discrete element simulation test of a fully mechanized top-coal caving process and further explore the intelligent fully mechanized coal caving technology, this research work studies ...
Lijuan Zhao, Lijuan Zhao, Liguo Han, Haining Zhang, Man Ge, Shijie Yang, Xin Jin   +6 more
doaj   +1 more source

Raise Caving—A Hybrid Mining Method Addressing Current Deep Cave Mining Challenges

BHM Berg- und Hüttenmännische Monatshefte, 2022
AbstractCave mining progresses to depths exceeding 1000 m and ore bodies situated in competent and strong rock masses are nowadays extracted by different cave mining methods. Widely applied caving methods in massive deposits are block and panel caving, inclined caving, and sublevel caving.
Tobias Ladinig, Horst Wagner, Markus Karlsson, Matthias Wimmer, Michal Grynienko   +4 more
openaire   +1 more source

Top coal recovery at different caving positions.

, 2023
The re-mined face using top coal caving system is the most applicable method for recovering the remaining reserves of a previous partially-mined thick coal seam.
Chunhua Zhang (148898), Shuai Wang (109515), Yu Yang (83671), Feng He (47348)   +3 more
core   +1 more source

Optimization of the parameters of sublevel caving method on the example of the Sasa Mine [PDF]

, 2006
The sublevel method of caving of the ore and wallrocks in the Sasa Mine has been used since the mine was put into operation. It is used mainly for excavation of ore bodies whose hanging wallrocks (schists) are prone to caving.
Markovski, Slobodan, Nikolov, Saso, Despodov, Zoran   +2 more
core   +2 more sources

Study on Bottom Damp‐Proof Method of Cave Dwelling [PDF]

Advances in Civil Engineering, 2018
The cave dwelling, as one of the most typical and traditional characteristic local housing styles in the loess area of Northwest China, has been adopted widely in many areas since ancient times. The construction of the cave dwellings supports environmental protection, makes use of innovative construction technology, and preserves historical cultural ...
Rong Wan, De-quan Kong, Li-xin Zhang
openaire   +2 more sources