آخرین محصولات
(a) Increasing depth of open-pit mines over the …
The overall steepness of pitwalls significantly influences the financial return of an open pit mine. In current practice, pitwall profiles are planar in cross-section.
Recovery of small rodents from open‐pit marble mining: effects …
Natural recovery in open-pit mines is vital for habitat restoration and ecosystem re-establishment, although few empirical studies have examined this process. Here, we assessed temporal and spatial responses of small rodents at the community, population, and individual levels during natural mine recovery.
ASSESSING THE EFFECT OF UTILIZATION AND …
From the fixed effects model, it was observed that the effect of utilization (i.e., 171.29) on production is higher than the effect of availability (131.56) on production, all things being equal.
Optimising Productivity and Safety of the Open Pit …
The open pit mining load and haul system has been a mainstay of the mining industry for many years. While machines have increased in size and scale and automation has become an important development, there have been few innovations to the actual load and haul process itself in recent times. This research highlights some of the potential …
Combined optimisation of an open-pit mine outline and the …
This paper develops a set of classified integer programming models for determining an optimum transition depth (OTD) between open pit and various …
Optimal Pitwall Shapes to Increase Financial Return and …
In the last four decades, a clear trend of open pit mines being excavated at increasing depths is apparent (Fig. 1a).As existing mines deepen owing to the increased efficiency of mining equipment and improved exploration techniques and technology, the ore bodies left to be exploited are everywhere deeper (Fig. 1b).Between 1930 and 2000, …
Formation mechanism and dynamic process of open-pit coal …
Expanding open-pit mining towards larger mining scales and greater stripping depths increases the potential risks of landslides on high and steep slopes, endangering human life and property. Therefore, it is of great significance to accurately reveal the main controlling factors and identify the key dynamic parameters to …
Monitoring the effects of open-pit mining on the eco
Environmental problems caused by mines have been increasing. As one of the most serious types of mining damage caused to the eco-environment, open pits have been the focus of monitoring and management. Previous studies have obtained effective results when evaluating the ecological quality of a mining area by using the remote …
Stripping Ratio in Open-Pit Mining, Types of | SpringerLink
The average stripping ratio indicates the total economic effect of open pit mines, and it can be used to judge whether the opening pit limit is good or not in design. Production Stripping Ratio Reflecting the time connotation, it is the ratio of the amount of stripping to the amount of ore in the open-pit mine within a certain period, i.e.:
Determination of the Optimum Crown Pillar …
production rate at low costs as an ... With increasing depth of the open-pit mines, ... Barton et al., 1974), while the effects of in-situ con ning . stress are well-covered in ...
Zai Pit Effects on Selected Soil Properties and Cowpea
Erratic rainfall and temperature regimes, strongly affect agricultural productivity. To address the reduction in production, this study assessed the effect of Zai pit depths on selected soil ...
Numerical and Experimental Analysis of the Effect of Faults in Open-Pit …
This thesis addresses two main issues in slope stability: 1) effect of faults in the large open pit mines and large rock slopes, and 2) improving stability of tailing dames using Hydro-Jex® technology.Section 1 - Effect of faults in the large open pit mines and large rock slopes: Deep open pit mines and large rock slopes expose many diverse rock …
Effects of Sublevel Open Stope Underground Mining on Surface and Open
PDF | On Jan 1, 2021, Tumelo K. M. Dintwe and others published Effects of Sublevel Open Stope Underground Mining on Surface and Open Pit Slopes | Find, read and cite all the research you need on ...
Optimization of blasting parameters and prediction of vibration effects
The influencing factors of blasting vibration in open pit mines are analyzed in detail, and the relationship among various parameters in various factors is sorted out. (3) A method of optimization and prediction of blasting vibration effect parameters in open pit mine based on depth neural network algorithm is proposed.
(PDF) Effects of the Loading and Unloading Conditions on …
In the process of open-pit excavation and stacking of dump along the side wall, the rock mass inside the composite slope undergoes complicated loading and unloading effect, which are manifested as ...
Effect Of Open‐Pit Blasting Vibrations on a Hanging‐Wall …
With the quickened pace of large-scale open-pit mining and open-pit mining depth increasing, more and more high-steep slopes are formed. Most mine slopes face problems such as the impact of open-pit blasting on hanging-wall ores and how to ensure the stability of high-steep slopes [1 – 3].
Transition of the Ernest Henry Mine from Open Pit to Underground …
The transition from an open-pit to an underground space is inevitable to exploit deposits from greater depth. Crown pillar, a remnant ore usually left in between open-pit to underground mining ...
Evaluating the Effect of Earthquakes on Open Pit Mine Slopes
The result shows that even though the valley shape geometry and absence of the top weathered layer make open pit mines less prone to earthquake-induced failures, excessive pore pressure in pit ...
An Overview of Slope Failure in Mining Operations
The primary aim of every twenty-first century mining operation is to extract as much ore as possible in a safe and economical manner. Failure in mine excavation occurs when the shear stress acting on the rock is greater than the shear strength of the rock mass. The stability of rock slopes in open-pit mine and quarry operations is extremely important …
Open Pit Mining
Open pit mining method is one of the surface mining methods that has a traditional cone-shaped excavation and is usually employed to exploit a near-surface, nonselective and low-grade zones …
(a) Increasing depth of open-pit mines over the years, after …
Download scientific diagram | (a) Increasing depth of open-pit mines over the years, after Brown (2004); (b) average depth of newly discovered ore deposits, after Randolph (2011) from publication ...
(PDF) Determination of Optimum Production Capacity and …
The production capacity of open-pit coal mines is an important parameter of mine design and development. Production capacity planning is closely related to the economic benefits of mining enterprises.
Effect Of Open-Pit Blasting Vibrations on a Hanging …
With the increase in the depth of large-scale open-pit mining, many mines have to face problems such as what is the effect of open-pit blasting on the rock slope and how to ensure the stability ...
An Overview of Slope Failure in Mining Operations
The primary aim of every twenty-first century mining operation is to extract as much ore as possible in a safe and economical manner. Failure in mine excavation occurs when the shear stress acting on the rock is greater …
Effect Of Open‐Pit Blasting Vibrations on a Hanging‐Wall …
With the increase in the depth of large-scale open-pit mining, many mines have to face problems such as what is the effect of open-pit blasting on the rock slope …
Effect Of Open-Pit Blasting Vibrations on a Hanging-Wall …
With the increase in the depth of large-scale open-pit mining, many mines have to face problems such as what is the effect of open-pit blasting on the rock slope and how to ensure the stability of ...
Study of the Influence of Block Caving Underground Mining on …
Block caving mining method is one of the most viable and preferred mass underground mining methods for low grade orebody. However, in combined surface and underground mining, the breakthrough of an underground caving under an open pit may result in subsidence at the bottom of the pit. This can pose a serious threat for the …
Effect Of Open-Pit Blasting Vibrations on a Hanging …
With the quickened pace of large-scale open-pit mining and open-pit mining depth increasing, more and more high-steep slopes are formed. Most mine slopes face problems such as the impact of open-pit blasting on hanging-wall ores and how to ensure the stability of high-steep slopes [1–3]. The hanging-wall ore is part of the ore body extending out-
Open-Pit Mine Production Optimization: A Review of …
) enclosed a 13% increase in the production Bougainville Copper Mine, 10 to 15 % improvement in the productivity of the Barrick Goldstrike Gold mine, 10 % of growth in …
Numerical study on spatial distribution of blast-induced …
It is a large-scale open-pit mine with a copper-molybdenum deposit and multiple associated minerals. It has 3.6 million tons of copper resources and 690,000 tons of molybdenum resources. Recently, an open-pit with a length of about 2,600 m, a width of 1,350 m, and an area of about 9.8 km 2 has been formed. The top of the designed final …
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