Optimisation of binder alternative for cemented paste fill in underground metal mines

2019 ◽  
Vol 12 (15) ◽  
Author(s):  
Prashant Singh ◽  
Chandra Nath Ghosh ◽  
Santosh Kumar Behera ◽  
Kanhaiya Mishra ◽  
Dhirendra Kumar ◽  
...  
Keyword(s):  
Metal Mines ◽  
Paste Fill

scholarly journals Quantitative Risk Assessment for Deep Tunnel Failure Based on Normal Cloud Model: A Case Study at the ASHELE Copper Mine, China

2021 ◽  
Vol 11 (11) ◽  
pp. 5208
Author(s):  
Jianpo Liu ◽  
Hongxu Shi ◽  
Ren Wang ◽  
Yingtao Si ◽  
Dengcheng Wei ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Large Scale ◽  
Cloud Model ◽  
Quantitative Risk Assessment ◽  
Geological Condition ◽  
Deep Tunnel ◽  
Entropy Weight ◽  
Copper Mine ◽  
Evaluation Indexes ◽  
Metal Mines

The spatial and temporal distribution of tunnel failure is very complex due to geologic heterogeneity and variability in both mining processes and tunnel arrangement in deep metal mines. In this paper, the quantitative risk assessment for deep tunnel failure was performed using a normal cloud model at the Ashele copper mine, China. This was completed by considering the evaluation indexes of geological condition, mining process, and microseismic data. A weighted distribution of evaluation indexes was determined by implementation of an entropy weight method to reveal the primary parameters controlling tunnel failure. Additionally, the damage levels of the tunnel were quantitatively assigned by computing the degree of membership that different damage levels had, based on the expectation normalization method. The methods of maximum membership principle, comprehensive evaluation value, and fuzzy entropy were considered to determine the tunnel damage levels and risk of occurrence. The application of this method at the Ashele copper mine demonstrates that it meets the requirement of risk assessment for deep tunnel failure and can provide a basis for large-scale regional tunnel failure control in deep metal mines.

Waste controls at base metal mines

1976 ◽  
Vol 10 (2) ◽  
pp. 130-135 ◽  
Author(s):  
Alan V. Bell
Keyword(s):  
Base Metal ◽  
Metal Mines

Blood lead levels of residents living around 350 abandoned metal mines in Korea

2011 ◽  
Vol 184 (7) ◽  
pp. 4139-4149 ◽  
Author(s):  
Nam-Soo Kim ◽  
Joon Sakong ◽  
Jae-Wook Choi ◽  
Young-Seoub Hong ◽  
Jai-Dong Moon ◽  
...  
Keyword(s):  
Blood Lead ◽  
Blood Lead Levels ◽  
Metal Mines ◽  
Lead Levels

scholarly journals Immobilization of Cd, Zn, and Pb from Soil Treated by Limestone with Variation of pH Using a Column Test

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Sung-Wook Yun ◽  
Chan Yu
Keyword(s):  
South Korea ◽  
Water Systems ◽  
Metal Mobility ◽  
Acid Solutions ◽  
Test Results ◽  
Column Test ◽  
Acidic Solutions ◽  
Ph Values ◽  
Metal Mines ◽  
Site Restoration

Decades of mining in South Korea have resulted in the contamination of large amounts of soil by metals. The most feasible approach to site restoration requires the use of a stabilization agent to reduce metal mobility. This study examined the leaching characteristics of limestone used as a stabilization agent when subjected to solutions of differing pH. In a laboratory-scale column test, solutions with pH values of 3.5, 4.6, and 5.6, representing acidic to nonacidic rainfall, were applied to soil mixed with limestone. Test results indicate that metal components can be released with the addition of acidic solutions, even if the soil is highly alkaline. Cd and Zn, in particular, exhibited abrupt or continuous leaching when exposed to acid solutions, indicating the potential for contamination of water systems as metal-laden soils are exposed to the slightly acidic rainfall typical of South Korea. Treatment using stabilization agents such as limestone may reduce leaching of metals from the contaminated soil. Stabilizing metal-contaminated farmland is an economical and feasible way to reduce pollutants around abandoned metal mines.

Evidence of micro-evolution in Crocidura russula from two abandoned heavy metal mines: potential use of Cytb, CYP1A1, and p53 as gene biomarkers

Ecotoxicology ◽  
2021 ◽  
Author(s):  
Ana Sofia Quina ◽  
Ana Filipa Durão ◽  
Maria da Luz Mathias
Keyword(s):  
Heavy Metal ◽  
Crocidura Russula ◽  
Metal Mines ◽  
Potential Use

scholarly journals Research background, content and route of geological environment survey and evaluation for typical metal mines in Yunnan, China

2016 ◽  
Vol 63 ◽  
pp. 03018
Author(s):  
Xian Feng Cheng ◽  
Jun Xu ◽  
Wu Fu Qi ◽  
Qian Rui Huang ◽  
Yi Zheng ◽  
...  
Keyword(s):  
Geological Environment ◽  
Metal Mines ◽  
Survey And Evaluation ◽  
Background Content

Numerical analysis of crown pillar recovery techniques beneath paste fill

2020 ◽  
pp. 295-301
Author(s):  
D.P. Sainsbury ◽  
Y. Cai
Keyword(s):  
Numerical Analysis ◽  
Recovery Techniques ◽  
Crown Pillar ◽  
Paste Fill
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