grade rock
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2020 ◽  
Vol 37 (9) ◽  
pp. 859-866
Author(s):  
Chunqiao Xiao ◽  
Yan Zhou ◽  
Jingang Hu ◽  
Shuyu Guo ◽  
Na Zhou ◽  
...  

Author(s):  
Venkata Surya Satyanarayana Avupati ◽  
M. Jagannadharao ◽  
K. Chandra Mouli ◽  
B. Seetaramireddy

It has been an argument that some of the elements present in geological material by using PIXE analysis are purely determined or could not be determined at all, due to various reasons including the matrix. It is felt that a systematic investigation needs to be designed and implemented to understand the limitation of PIXE in certain elements. The high-grade rocks selected are analyzed both by PIXE as well as AAS and the results are authenticated by using a USGS reference material, Basalt, studies of literature. It is believed that the accuracy of problematic elements, especially from high grade rock can be improved and the conditions of PIXE can be standardized for various elements under different combinations. The reasons behind the poor performance of Proton Induced X- ray Emission in case of certain elements have been established.


2020 ◽  
Vol 168 ◽  
pp. 00016
Author(s):  
Kanay Rysbekov ◽  
Ayan Toktarov ◽  
Tursyn Kalybekov ◽  
Serik Moldabayev ◽  
Timur Yessezhulov ◽  
...  

This article deals with production planning in the context of providing technology at each mining stage with developed and ready-tostoping reserves. In order to address the problem, the ore body is represented by a geological block model. Numerical data is used to represent the attributes of each block, such as mass, density, ore grade, rock type. The mining plan provision with reserve standards on the degree of reconnaissance for production is reduced to the optimization task solution. The main condition for ensuring the planned production productivity of the mine is to provide the minimum necessary developed reserves. In the proposed mathematical model, it is taken into account by one of the objective function’s terminators for solving the set task. As the results of the calculations have shown, such a scheduling ensures approach that there is developed ore’s sufficient amount for at least 6 months at the beginning of each period, which is a clear advantage of the proposed model.


2019 ◽  
Vol 34 (12) ◽  
pp. 743-750
Author(s):  
Kalinga Hapuhinna ◽  
Rajitha Deshapriya Gunaratne ◽  
Jagath Pitawala

2017 ◽  
Vol 20 (2) ◽  
Author(s):  
Chunqiao Xiao ◽  
Guang Xu ◽  
Qi Wang ◽  
Ruan Chi

AbstractA bacterial culture, which was mixed by three thermophilic iron-oxidizing bacteria, namely


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