The influence of drilling process automation on improvement of blasting works quality in open pit mining

The article describes the monitoring system of blasthole drilling process called HNS (Hole Navigation System), which was used in blasting works performed by Maxam Poland Ltd. Developed by Atlas Copco's, the HNS system – using satellite data – allows for a very accurate mapping of the designed grid of blastholes. The article presents the results of several conducted measurements of ground vibrations triggered by blasting, designed and performed using traditional technology and using the HNS system and shows first observations in this matter.

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Identification of Factors Causing Damage to Conveyor Belts during the Transportation of Coal

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.683.130 ◽

2014 ◽

Vol 683 ◽

pp. 130-134

Author(s):

Erika Škrabuľáková ◽

Daniela Marasová ◽

Marianna Tomašková ◽

Peter Grendel

Keyword(s):

Bipartite Graph ◽

Monitoring System ◽

Statistical Processing ◽

Open Pit ◽

Open Pit Mining ◽

Negative Effects ◽

Conveyor Belts ◽

Effect Relation

The paper deals with the identification of the factors that cause damages of conveyor belts at coal quarry. On the base of statistical processing of the data obtained from 4 open-pit mining sectors the most important factors causing time-outs are identified. The cause-effect relation is demonstrated on the example of bipartite graph where the higher valence of each out-vertex signalizes the greater importantce of the considered factor to cause shatter effects. In order to avert the negative effects, break-downs and increase the reliability of conveyor belts a monitoring system for these belts is proposed.

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3D Spatial Interpolation Methods for Open-Pit Mining Air Quality with Data Acquired by Small UAV Based Monitoring System

Inżynieria Mineralna ◽

10.29227/im-2020-02-32 ◽

2020 ◽

Vol 1 (2) ◽

Author(s):

Quoc Long Nguyen ◽

Cao XUAN CUONG ◽

Le VAN CANH ◽

Nguyen NGOC BICH ◽

Dang AN TRAN ◽

...

Keyword(s):

Air Quality ◽

Monitoring System ◽

Spatial Interpolation ◽

Coal Mines ◽

Quality Monitoring ◽

Open Pit ◽

Open Pit Mining ◽

Air Quality Monitoring ◽

Trilinear Interpolation ◽

Spatial Interpolation Methods

Open-pit mining activities, including blasting, drilling, loading, and transport, often result in the direct emission of particulates and gases into the atmosphere. Occupational exposure to these pollutants is considered as the risk for health, especially the risk of developing respiratory diseases. An air quality monitoring system and spatial analysis are necessary to identify these potential hazards. In this study, we propose an air quality monitoring system that integrates gas and dust sensors into a small multi-rotor copter or unmanned aerial vehicle (UAV). Different spatial interpolation methods including trilinear interpolation, nearest neighbour, and natural neighbour applied to the monitoring data (CO, SO2, PM2.5, CO2) from our system to derive air concentration levels in the atmosphere of open-pit coal mines were also examined. The results show that the UAV based air quality monitoring system performed efficiently and safely in conditions of deep open-pit coal mines. In addition, for the estimation of the concentration level of gases and dust in unsampled points, trilinear interpolation performed with the most accurate result, followed by natural neighbor and nearest neighbor.

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Guidelines for Slope Performance Monitoring

10.1071/9781486311002 ◽

2020 ◽

Keyword(s):

Monitoring System ◽

Performance Monitoring ◽

Mining Operation ◽

Open Pit ◽

Open Pit Mining ◽

System Management ◽

Mining Operations ◽

Industry Practice ◽

Slope Monitoring ◽

Acquisition Management

Although most mining companies utilise systems for slope monitoring, experience indicates that mining operations continue to be surprised by the occurrence of adverse geotechnical events. A comprehensive and robust performance monitoring system is an essential component of slope management in an open pit mining operation. The development of such a system requires considerable expertise to ensure the monitoring system is effective and reliable. Written by instrumentation experts and geotechnical practitioners, Guidelines for Slope Performance Monitoring is an initiative of the Large Open Pit (LOP) Project and the fifth book in the Guidelines for Open Pit Slope Design series. Its 10 chapters present the process of establishing and operating a slope monitoring system; the fundamentals of pit slope monitoring instrumentation and methods; monitoring system operation; data acquisition, management and analysis; and utilising and communicating monitoring results. The implications of increased automation of mining operations are also discussed, including the future requirements of performance monitoring. Guidelines for Slope Performance Monitoring summarises leading mine industry practice in monitoring system design, implementation, system management, data management and reporting, and provides guidance for engineers, geologists, technicians and others responsible for geotechnical risk management.

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Drive systems of the drilling rigs for open pits in Ukraine: state and ways for improvement

E3S Web of Conferences ◽

10.1051/e3sconf/201912301042 ◽

2019 ◽

Vol 123 ◽

pp. 01042

Author(s):

Viktor Khilov ◽

Nataliia Hlukhova ◽

Andrii Somin ◽

Volodymyr Kiiko

Keyword(s):

Frequency Characteristics ◽

Open Pit ◽

Open Pit Mining ◽

Pass Band ◽

Processing Plant ◽

Drilling Process ◽

Geological Conditions ◽

Drive Systems ◽

Drilling Rigs ◽

Oscillation Frequencies

A comparative analysis is presented of the characteristics of drilling rigs used in open-pit mining in Ukraine. The experimental studies have been conducted of the drive systems and drilling rigs influence on the dynamics of the drilling process under the mining and geological conditions of the Central Mining and Processing Plant (Kryvyi Rih city, Ukraine). The frequency characteristics have been obtained and the dynamic properties of the automated drive systems, as well as frequency characteristics of the rotation mechanism transmissions have been analyzed. The behavior of natural oscillation frequencies in closed control loops of rotational drives was studied, and it has been determined that they exceed the cutoff frequency and fall into the pass band from the attenuation band in frequency-controlled induction motors of most advanced drilling rigs with the maximum number of rods connected in the drill string. It has been established that low oscillation frequencies due to the side frequencies, generated by the drill rod oscillations, fall into the fastest internal current loop. The tasks have been formulated for further research. The purpose of research is to solve the actual scientific and applied problem of dynamic compatibility of frequency characteristics in the modern high speed drive systems with the dynamic characteristics of drilling rigs, which are multi-mass mechanisms with distributed and concentrated parameters with a change in added masses.

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Productivity Analysis of Raisebore RB-50X for Raise Slot Drilling at Extraction level GBC PT. Freeport Indonesia

Journal of Earth and Marine Technology (JEMT) ◽

10.31284/j.jemt.2021.v2i1.2169 ◽

2021 ◽

Vol 2 (1) ◽

Author(s):

R J Kakisina ◽

Yudho Dwi Galih Cahyono

Keyword(s):

Underground Mining ◽

Open Pit ◽

Open Pit Mining ◽

Drilling Process ◽

Productivity Analysis ◽

Free Face ◽

Development Cycle ◽

Secondary Support ◽

Main Support ◽

The Impact

PT Freeport Indonesia is the largest gold and copper mine in Indonesia, located in Mimika Regency, Papua Province. In its operation, PT. Freeport Indonesia applies two mining systems, namely open pit mining and underground mining. Underground Mine at PT. Freeport Indonesia consists of DOZ, Big Gosan, DMLZ, Kucing Liar, and GBC, with one of the methods applied by PT. Freeport Indonesia is a block caving method. The Grasberg Block Cave mine has entered the production stage since September 2018, but in its operation the GBC Mine is still developing its operational area to meet production targets (development). The development cycle (cycle development), which is the main operation carried out, namely drilling and blasting, loading & transporting (mucking & hauling), primary support, and secondary support. To support the main operations, it is necessary to have main support consisting of access and area, ventilation, water and water, electricity, pull of tests, surveys, and dewatering. In the blasting process at the drawbell, one free face is needed which functions as the direction of rock collapsing in the blasting process on the drawbell. Making free face or commonly known as slot raise using a rasiebore machine from PT. Redpath for slot raise drilling. Meanwhile, in the drilling stage, the slot raise has a problem that has resulted in delays in the drilling process for the RB-50X raisebore tool. The impact of the delay in making the slot raise resulted in not achieving the production target due to a delay in the blasting process, where the blasting process in the drawbell area functions to break the rock so that it falls and can be transported to the crusher to enter the rock sizing process.

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Open Pit Mining Technologies for Watered Lignite Deposits in the Kansk-Achinsk Basin

Физико-технические проблемы разработки полезных ископаемых ◽

10.15372/ftprpi20190112 ◽

2019 ◽

Keyword(s):

Open Pit ◽

Open Pit Mining ◽

Lignite Deposits

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Validation of Slopes of Access Roads in Deep Open Pit Mining

Физико-технические проблемы разработки полезных ископаемых ◽

10.15372/ftprpi20180111 ◽

2018 ◽

Keyword(s):

Open Pit ◽

Open Pit Mining

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Coal mining-disturbed land reclamation laws

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2020-6-0-15-26 ◽

2020 ◽

pp. 15-26

Author(s):

T. V. Galanina ◽

M. I. Baumgarten ◽

T. G. Koroleva

Keyword(s):

Large Scale ◽

Land Reclamation ◽

Mining Industry ◽

Development Program ◽

Soil Disturbance ◽

Open Pit ◽

Open Pit Mining ◽

Disturbed Land ◽

Critical Problems ◽

Production Output

Large-scale mining disturbs wide areas of land. The development program for the mining industry, with an expected considerable increase in production output, aggravates the problem with even vaster territories exposed to the adverse anthropogenic impact. Recovery of mining-induced ecosystems in the mineral-extracting regions becomes the top priority objective. There are many restoration mechanisms, and they should be used in integration and be highly technologically intensive as the environmental impact is many-sided. This involves pollution of water, generation of much waste and soil disturbance which is the most typical of open pit mining. Scale disturbance of land, withdrawal of farming land, land pollution and littering are critical problems to the solved in the first place. One of the way outs is highquality reclamation. This article reviews the effective rules and regulations on reclamation. The mechanism is proposed for the legal control of disturbed land reclamation on a regional and federal level. Highly technologically intensive recovery of mining-induced landscape will be backed up by the natural environment restoration strategy proposed in the Disturbed Land Reclamation Concept.

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