scholarly journals Use of Gas Emulsion in Blasting Project for Clearing in a Copper Mine in Southern Peru

2021 ◽  
Vol 11 (5) ◽  
pp. 157-164
Author(s):  
Dr. Christ Barriga P. ◽  
Ing. Mabel Calderón V.
Keyword(s):  
Detonation Velocity ◽  
Large Scale ◽  
Mining Operation ◽  
Explosive Mixture ◽  
Waste Area ◽  
Copper Mine ◽  
Southern Peru ◽  
Mining Project ◽  
High Resolution Images ◽  
Great Relevance

The gasifiable emulsion is a technological and productive response to the need to reduce operating costs in the mining project, among the improvements with respect to ANFO are a higher detonation velocity (VOD), better fragmentation and reduction of nitrous fumes. In the test mining operation, a commercial explosive mixture called "Q "73 (70% emulsion and 30% ANFO) is used, where the ANFO is composed of 97% ammonium nitrate and 3% diesel, and the explosive mixture "Q "82 (80% emulsion and 20% ANFO) is also used, 7 blasting processes were carried out with a diameter of 12.25 in. in a waste area, the most characteristic rocks found in the blasting project in the copper mine in southern Peru are Toba Cristal (TC), Andesite Basaltic Propylitic (BA-PRO), Andesite Basaltic Argillic (BA-ARG). The results obtained show a reduction of the Power Factor by 1.32%, with respect to the commercial mixtures "Q "73 and "Q "82 an optimum increase in the detonation velocity of 9.92% and 0.59% was obtained, also the high-resolution images of the fumes after blasting indicate a low presence of orange fumes taking a great relevance in the mining sector on a large scale, achieving better results in the blasting phase.

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.

Graphically Modeling the Prehistory of Regional Interactions in the Moquegua Valley, Southern Peru

2018 ◽  
Author(s):  
Kirk E. Costion ◽  
Ulrike Matthies Green
Keyword(s):  
Cultural Landscape ◽  
Large Scale ◽  
Interaction Model ◽  
Cross Cultural ◽  
Cultural Interaction ◽  
Middle Horizon ◽  
Southern Peru ◽  
Intermediate Period ◽  
The Cross ◽  
Moquegua Valley

The Cross-Cultural Interaction Model was first developed specifically to help model the cultural interactions taking place in the Moquegua Valley of Southern Peru during the culturally dynamic early Middle Horizon. This chapter highlights the flexibility of the Cross-Cultural Interaction Model by using it to illustrate how regional interactions changed throughout the prehistoric sequence of this region. The Moquegua drainage is the easiest route from the highlands of the Southern Titicaca altiplano to the Pacific Ocean; in addition the middle Moquegua Valley is ideal for large-scale maize agriculture. As a result, regional interactions have been an integral element in this region’s cultural evolution. Starting with the Archaic Period and continuing through the Late Intermediate Period this chapter graphically explores the nature of the regional interactions that took place in each time period and how these interactions shaped the cultural landscape of the Moquegua Valley over time

scholarly journals High Resolution Satellite Images for Instantaneous Shoreline Extraction Using New Enhancement Algorithms

Geosciences ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 123 ◽  
Author(s):  
Donatella Dominici ◽  
Sara Zollini ◽  
Maria Alicandro ◽  
Francesca Della Torre ◽  
Paolo Buscema ◽  
...  
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Satellite Images ◽  
Human Life ◽  
Essential Element ◽  
Action Planning ◽  
High Resolution Satellite Images ◽  
High Resolution Images ◽  
Territorial Government ◽  
Very High

Knowledge of a territory is an essential element in any future planning action and in appropriate territorial and environmental requalification action planning. The current large-scale availability of satellite data, thanks to very high resolution images, provides professional users in the environmental, urban planning, engineering, and territorial government sectors, in general, with large amounts of useful data with which to monitor the territory and cultural heritage. Italy is experiencing environmental emergencies, and coastal erosion is one of the greatest threats, not only to the Italian heritage and economy, but also to human life. The aim of this paper is to find a rapid way of identifying the instantaneous shoreline. This possibility could help government institutions such as regions, civil protection, etc., to analyze large areas of land quickly. The focus is on instantaneous shoreline extraction in Ortona (CH, Italy), without considering tides, using WorldView-2 satellite images (50-cm resolution in panchromatic and 2 m in multispectral). In particular, the main purpose of this paper is to compare commercial software and ACM filters to test their effectiveness.

Practical Experience in Large-Scale Development of Zijinshan Low-Grade Gold-Copper Mine

2020 ◽  
Vol 37 (4) ◽  
pp. 1339-1347 ◽  
Author(s):  
Jinghe Chen ◽  
Shuiping Zhong ◽  
Ding Tang ◽  
Chen Kuang
Keyword(s):  
Scale Development ◽  
Large Scale ◽  
Practical Experience ◽  
Low Grade ◽  
Copper Mine

Conceptual design of underground laboratory under dynamic load condition in deep copper mine

2020 ◽  
Author(s):  
Krzysztof Fulawka ◽  
Marcin Szumny ◽  
Witold Pytel ◽  
Piotr Mertuszka
Keyword(s):  
Dynamic Load ◽  
Large Scale ◽  
Load Condition ◽  
Underground Laboratory ◽  
Underground Mines ◽  
Mining Institute ◽  
Seismic Load ◽  
Copper Mine ◽  
Total Displacement ◽  
The Moment

<p>Underground laboratories, due to their unique location, are facilities with high research and educational potential. Development of old mine chambers or setting up of new mining panels designed strictly for research and educational purpose may contribute to the development of new mining technologies. One of the initiatives aimed to enhance of the underground space usage in Europe is BSUIN project conducted in the framework of INTERREG Baltic Sea Region program. At the moment there is only one underground laboratory designed fully for research and development purposes i.e. Experimental Mine Barbara lead by Central Mining Institute of Poland. But still, there are several dozen active underground mines working in Poland. Unfortunately, the large scale of the mined-out area contributes to the generation of relatively high seismicity around mining regions. Due to safety reasons management of Polish underground mines in most cases do not allow to build such a facility like underground laboratories in close vicinity of active mining works.</p><p>Within this paper, the prototype of an underground laboratory affected by additional seismic load was prepared in condition of Polish underground copper mine. Changes in total displacement and stresses around newly created chambers with use of FEM-based numerical modelling were determined. In result possibility of setting up of underground facility under dynamic load condition was determined.</p>

Forensic analysis of the instability of a large-scale slope in a coal mining operation

2013 ◽  
Vol 33 ◽  
pp. 197-211 ◽  
Author(s):  
M. Inmaculada Alvarez-Fernandez ◽  
E. Amor-Herrera ◽  
C. Gonzalez-Nicieza ◽  
F. Lopez-Gayarre ◽  
M. Rodriguez Avial-Llardent
Keyword(s):  
Coal Mining ◽  
Large Scale ◽  
Mining Operation ◽  
Forensic Analysis

scholarly journals Identification of pollution sources in closed mining sites with an Impact on the quality of surface water in the Brad area

2021 ◽  
Vol 342 ◽  
pp. 03012
Author(s):  
Emilia-Cornelia Dunca ◽  
Tiberiu Rusu ◽  
Dorin Iancu
Keyword(s):  
Surface Water ◽  
Large Scale ◽  
Mining Operation ◽  
Point Sources ◽  
Underground Mines ◽  
Mining Sites ◽  
Surface Activities ◽  
Large Scale Disturbance ◽  
Gold Silver

Pollution caused by closed mining activities is particularly difficult to treat because it dates back a very long time. Water contamination results from large-scale disturbance of the land on which the underground exploitation of the useful mineral substance took place. Discharges from underground mines can be treated as diffuse point sources; water quality is due to reactions that occur in an area that can cover tens of square kilometres. The main sources are groundwater, which increases after the pumping is stopped, and tailings stored in dumps and tailings ponds. When the mine closes, the pumps are stopped and the groundwater level rises until it reaches the surface or discharges into the aquifers above. Although discharges from wells and galleries are often the most visible sources, surface activities such as mineral processing, tailings and waste disposal are also a significant source of pollution. The river is located on the Barza gold-silver ore mining operation took place. The runoff waters present in this perimeter can transport contaminated sediments, where the tailings dumps are washed away by precipitation. The paper aims to identify the sources of surface water pollution in the Barza closed mining site that influences the quality of surface water.

Stepping Stones Across the Lihir Islands: Developing Cultural Heritage Management in the Context of a Gold-Mining Operation

2011 ◽  
Vol 18 (1) ◽  
pp. 81-110 ◽  
Author(s):  
Nicholas A. Bainton ◽  
Chris Ballard ◽  
Kirsty Gillespie ◽  
Nicholas Hall
Keyword(s):  
Cultural Heritage ◽  
Large Scale ◽  
Gold Mining ◽  
Mining Operation ◽  
Indigenous Communities ◽  
Management Program ◽  
Heritage Management ◽  
Resource Extraction ◽  
Stepping Stones ◽  
Cultural Heritage Management

AbstractLarge-scale resource extraction projects often create obstacles for the protection, maintenance, and inheritance of indigenous cultural heritage. In this article we detail some of the challenges and opportunities arising from our collaborative partnership with the community of the Lihir Islands in Papua New Guinea, which is seeking to establish, inform, and resource a formal cultural heritage management program in the context of a large-scale gold-mining operation. The general approach to this collaborative venture involves the application of a specific development tool, the Stepping Stones for Cultural Heritage program. This consultative process is innovative in both Melanesia and the context of resource extraction, but also more generally within the field of cultural heritage. We describe the outcomes of this process and some of the initial pilot projects, one of which was based on the recording of traditional Lihirian songs. We also argue that while the mine places greater pressure upon Lihirian cultural heritage, it also presents Lihirians with the opportunity to realize a vision of their cultural future that is beyond the reach of many other indigenous communities.

Management of Data Streams for Large-Scale Data Mining

2011 ◽  
pp. 136-153
Author(s):  
Jon R. Wright ◽  
Gregg T. Vesonder ◽  
Tamraparni Dasu
Keyword(s):  
Data Mining ◽  
Data Streams ◽  
Information Acquisition ◽  
Large Scale ◽  
Knowledge Engineering ◽  
Mining Operation ◽  
Large Scale Data ◽  
Technical Issues ◽  
Automate Information ◽  
Scale Data

In an enterprise setting, a major challenge for any data mining operation is managing data streams or feeds, both data and metadata, to ensure a stable and certifiably accurate flow of data. Data feeds in this environment can be complex, numerous and opaque. The management of frequently changing data and metadata presents a considerable challenge. In this paper, we articulate the technical issues involved in the task of managing enterprise data and propose a multi-disciplinary solution, derived from fields such as knowledge engineering and statistics, to understand, standardize, and automate information acquisition and quality management in preparation for enterprise mining.

scholarly journals The capillary bed offers the largest hemodynamic resistance to the cortical blood supply

2016 ◽  
Vol 37 (1) ◽  
pp. 52-68 ◽  
Author(s):  
Ian Gopal Gould ◽  
Philbert Tsai ◽  
David Kleinfeld ◽  
Andreas Linninger
Keyword(s):  
Blood Flow ◽  
Large Scale ◽  
Flow Distribution ◽  
Tissue Perfusion ◽  
Oxygen Metabolism ◽  
Pressure Drops ◽  
Key Factor ◽  
High Resolution Images ◽  
Capillary Bed ◽  
Microscopy Data

The cortical angioarchitecture is a key factor in controlling cerebral blood flow and oxygen metabolism. Difficulties in imaging the complex microanatomy of the cortex have so far restricted insight about blood flow distribution in the microcirculation. A new methodology combining advanced microscopy data with large scale hemodynamic simulations enabled us to quantify the effect of the angioarchitecture on the cerebral microcirculation. High-resolution images of the mouse primary somatosensory cortex were input into with a comprehensive computational model of cerebral perfusion and oxygen supply ranging from the pial vessels to individual brain cells. Simulations of blood flow, hematocrit and oxygen tension show that the wide variation of hemodynamic states in the tortuous, randomly organized capillary bed is responsible for relatively uniform cortical tissue perfusion and oxygenation. Computational analysis of microcirculatory blood flow and pressure drops further indicates that the capillary bed, including capillaries adjacent to feeding arterioles (d < 10 µm), are the largest contributors to hydraulic resistance.

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