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Castaño Arranz, M., Gustafson, A. & Al-Chalabi, H. (2020). A generic framework for data quality analytics. International Journal of COMADEM, 23(1), 31-38
Open this publication in new window or tab >>A generic framework for data quality analytics
2020 (English)In: International Journal of COMADEM, ISSN 1363-7681, Vol. 23, no 1, p. 31-38Article in journal (Refereed) Published
Abstract [en]

The challenge of generalizing Data Quality assessment is hindered by the fact that Data Quality requisites depend on the purpose for which the data will be used and on the subjectivity of the data consumer. The approach proposed in this paper to address this challenge is to employ a semi-automated user-guided Data Quality assessment. This paper introduces a generic framework for data quality analytics which is mainly composed by a set of software units to perform semi-automated Data Quality analytics and a set of Graphical User Interfaces to enable the user to guide the Data Quality assessment. The framework has been implemented and can be customized according to the needs of the purpose and of the consumer. The framework has been instantiated in a case study on Long-hole drill rigs, where several Data Quality issues have been discovered and their root cause investigated.

Place, publisher, year, edition, pages
COMADEM International, 2020
Keywords
Data Quality, Maintenance, Long-hole drilling, Mining
National Category
Other Civil Engineering
Research subject
Operation and Maintenance; Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-78501 (URN)
Projects
IDQ4LCCAIF/R
Funder
Vinnova
Note

Validerad;2020;Nivå 1;2020-04-21 (alebob)

Available from: 2020-04-15 Created: 2020-04-15 Last updated: 2020-04-21Bibliographically approved
Manzoor, S., Liaghat, S., Gustafson, A., Johansson, D. & Schunnesson, H. (2020). Establishing relationships between structural data from close-range terrestrial digital photogrammetry and measurement while drilling data. Engineering Geology, 267, Article ID 105480.
Open this publication in new window or tab >>Establishing relationships between structural data from close-range terrestrial digital photogrammetry and measurement while drilling data
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2020 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 267, article id 105480Article in journal (Refereed) Published
Abstract [en]

Geologists, mine planners, geotechnical, and mining engineers always strive for maximum information to get a better insight of the rock mass before interacting with it. Over the recent decades, close-range terrestrial digital photogrammetry (CRTDP) has been increasingly used for data acquisition and to support the conventional methods for rock mass characterization. It provides a safe, time-saving and contact-free way to gather enough data to minimize user dependent biases. However, it requires an expensive camera, fieldwork and some software to extract the information from images. In addition, it can over-estimate the rock fracturing sometimes due to weathering of the rock face or poor blasting practices. Measurement while drilling (MWD) data include the responses of different drilling parameters to the variations in the rock mass. MWD data are produced in large quantity, as they come from every hole drilled. These data correspond to the inside variations of rock rather than the surface ones counted in photogrammetry.

In this paper, structural data are obtained from different bench faces of an open pit mine using a commercial software package, ShapeMetriX3D (by 3GSM). These data are compared to the MWD data of the boreholes that were blasted to produce these bench faces to establish certain relationships between drilling parameters and rock mass structures. Half casts of the boreholes with MWD data were visible on the bench faces of the pre-split wall that allowed a better correlation. The results show abrupt changes in MWD parameters for open joints or cavities with some infilling material and overall increases or decreases in parameters for closely spaced bedding planes, fractures or foliations. The results are promising and suggest the method can be used to characterize the rock mass, modify the charging of explosives in blasting operations and facilitate the geological modeling of the rock mass.

Place, publisher, year, edition, pages
Elsevier, 2020
Keywords
close-range terrestrial digital photogrammetry, measurement while drilling data
National Category
Geotechnical Engineering Mineral and Mine Engineering Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-77788 (URN)10.1016/j.enggeo.2020.105480 (DOI)000518868200021 ()2-s2.0-85077774640 (Scopus ID)
Funder
Vinnova
Note

Validerad;2020;Nivå 2;2020-02-21 (johcin)

Available from: 2020-02-20 Created: 2020-02-20 Last updated: 2020-05-14Bibliographically approved
Gustafson, A., Schunnesson, H., Paraszczak, J., Shekhar, G., BErgström, S. & Brännman, P. (2020). Operator influence on the loading process at LKAB's Iron ore mines. Journal of the South African Institute of Mining and Metallurgy, 120(3), 191-202
Open this publication in new window or tab >>Operator influence on the loading process at LKAB's Iron ore mines
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2020 (English)In: Journal of the South African Institute of Mining and Metallurgy, ISSN 0038-223X, Vol. 120, no 3, p. 191-202Article in journal (Refereed) Published
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ltu:diva-78882 (URN)
Available from: 2020-05-14 Created: 2020-05-14 Last updated: 2020-05-14
Schunnesson, H., Shekhar, G., Gustafson, A. & Johansson, D. (2019). A review of mining practices for surface support: an international survey. In: : . Paper presented at Ground Support 2019 (pp. 283-293). Sudbury, Canada
Open this publication in new window or tab >>A review of mining practices for surface support: an international survey
2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper reviews mining practices for surface support and identifies four key areas that need attention. An international survey was conducted as part of the Mining Initiative on Ground Support Systems and Equipment III project from 2017 to 2018. The survey used a standardised, web-based questionnaire adapted for personal computers and smartphones. The survey was distributed globally, with data collected from 58 underground mines with different mining conditions and challenges. The results highlight the challenges with regard to safety and automation of surface support for different rock conditions and the advantages and disadvantages of various machines (face drills versus mechanised dedicated bolters versus semi-mechanised bolters) used to install surface support. The survey also shows the ambiguity in the mining community with regard to productivity of mine support. This paper presents an approach for collecting technical data through an online tool, which is inexpensive and effective.

Place, publisher, year, edition, pages
Sudbury, Canada: , 2019
Keywords
surface support, mesh/screen installation, productivity, qualitative review, mine automation
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-76799 (URN)978-0-9876389-4-6 (ISBN)
Conference
Ground Support 2019
Available from: 2019-11-21 Created: 2019-11-21 Last updated: 2020-04-29
Shekhar, G., Gustafson, A., Hersinger, A., Jonsson, K. & Schunnesson, H. (2019). Development of a model for economic control of loading in sublevel caving mines. Mining Technology:Transactions of the Institutions of Mining and Metallurgy, 128(2), 118-128
Open this publication in new window or tab >>Development of a model for economic control of loading in sublevel caving mines
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2019 (English)In: Mining Technology:Transactions of the Institutions of Mining and Metallurgy, ISSN 2572-6668, Vol. 128, no 2, p. 118-128Article in journal (Refereed) Published
Abstract [en]

This paper presents an economic model for optimizing loading at the draw point in sublevel caving (SLC) operations. The input data consist of estimated bucket grades based on bucket weights from Load Haul Dump machines. This information, together with average operational mining costs, was used to create an economic model providing a real-time economic assessment of the draw point performance for SLC rings. The results demonstrate the importance of continuous draw point monitoring to optimize SLC operations. The proposed model provides an economic assessment of operating draw points and will help mine personnel to decide when to stop loading from a blasted ring. It can also help mine management understand the complexity of material flow in SLC operations. Finally, it provides operational flexibility for the mine to optimize loading at the draw point by increasing ore recovery while maintaining operational control of draw point performance.

Place, publisher, year, edition, pages
Taylor & Francis, 2019
Keywords
Draw control, mine economics, sublevel caving (SLC), draw point performance, Load Haul Dump (LHD)
National Category
Engineering and Technology Other Civil Engineering Business Administration
Research subject
Mining and Rock Engineering; Accounting and Control
Identifiers
urn:nbn:se:ltu:diva-73175 (URN)10.1080/25726668.2019.1586371 (DOI)000471557200005 ()2-s2.0-85064570087 (Scopus ID)
Funder
Vinnova, 1832144
Note

Validerad;2019;Nivå 2;2019-05-03 (johcin)

Available from: 2019-03-12 Created: 2019-03-12 Last updated: 2020-02-04Bibliographically approved
Ghosh, R., Gustafson, A. & Schunnesson, H. (2018). Development of a geological model for chargeability assessment of borehole using drill monitoring technique. International Journal of Rock Mechanics And Mining Sciences, 109, 9-18
Open this publication in new window or tab >>Development of a geological model for chargeability assessment of borehole using drill monitoring technique
2018 (English)In: International Journal of Rock Mechanics And Mining Sciences, ISSN 1365-1609, E-ISSN 1873-4545, Vol. 109, p. 9-18Article in journal (Refereed) Published
Abstract [en]

In the mining industry, the ability to charge and blast a production borehole is fundamental. However, if rock mass conditions are challenging, with cavities, fracture zones or even unstable boreholes, the charging crew may fail to insert the required amount of explosives, resulting in bad fragmentation and significant production disturbances in the downstream process. Prior detailed knowledge of the chargeability of each production fan or ring will improve both the planning and execution of the charging work in a mine. The paper describes a study using the drill monitoring technique to assess the chargeability of production boreholes. For the study, data were collected on four drill parameters, penetration rate, rotation pressure, feed pressure and percussive pressure, from 23 drill fans with a total of 186 boreholes. A parameter called fracturing was calculated based on penetration rate variability and rotation pressure variability. Sixty-three boreholes were filmed to establish different rock mass conditions: solid rock, cavities, fractured zones and cave-ins. Principal Component Analysis (PCA) was performed to model the relationship between drill monitoring data and the geological features. The developed model shows high potential by identifying charging problems directly from drill monitoring data, and has been verified and validated in a real charging operation in an operating mine.

Place, publisher, year, edition, pages
Elsevier, 2018
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-70266 (URN)10.1016/j.ijrmms.2018.06.015 (DOI)000440458000002 ()2-s2.0-85049528017 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-08-08 (andbra)

Available from: 2018-08-08 Created: 2018-08-08 Last updated: 2018-08-21Bibliographically approved
Shekhar, G., Gustafson, A., Boeg-Jensen, P., Malmgren, L. & Schunnesson, H. (2018). Draw control strategies in sublevel caving mines: A baseline mapping of LKAB's Malmberget and Kiirunavaara mines. The Southern African Journal of Mining and Metallurgy, 118(7), 723-733
Open this publication in new window or tab >>Draw control strategies in sublevel caving mines: A baseline mapping of LKAB's Malmberget and Kiirunavaara mines
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2018 (English)In: The Southern African Journal of Mining and Metallurgy, ISSN 2225-6253, E-ISSN 1543-9518, Vol. 118, no 7, p. 723-733Article in journal (Refereed) Published
Abstract [en]

The Malmberget and Kiirunavaara mines are the two largest underground iron ore operations in the world. Luossavaara-Kiirunavaara AB (LKAB) uses sublevel caving (SLC) to operate the mines while maintaining a high level of productivity and safety. The paper enumerates the loading criteria and loading constraints at the mines and outlines details of mine design, layout, and geology affecting the draw control. A study of the various draw control strategies used in sublevel caving operations globally has also been done to establish the present state-of-the-art. An analysis of the draw control and loading operations at the Malmberget and Kiirunavaara mines is summarized using information collected through interviews, internal documents, meetings, and manuals. An optimized draw control strategy is vital for improving ore recovery and reducing dilution in SLC. Based on the literature review and baseline mapping study, a set of guidelines for designing a new draw control strategy is presented. The draw control strategy at Malmberget and Kiirunavaara is guided by a bucket-weightbased drawpoint monitoring system that is part of the overall framework. Both mines employ a draw control strategy that considers the production requirements and mining constraints while regulating the loading process through an empirical method based on bucket weights and grades. However, in the present scenario of fluctuating metal prices and increasing operational costs a new draw control strategy is needed which is probabilistic in nature and can handle the uncertainties associated with caving operations.

Place, publisher, year, edition, pages
The Southern African Institute of Mining and Metallurgy, 2018
Keywords
Sublevel caving, draw control, optimization, draw point monitoring
National Category
Engineering and Technology Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-71770 (URN)10.17159/2411-9717/2018/v118n7a6 (DOI)000442393900006 ()2-s2.0-85053623244 (Scopus ID)
Projects
SIP-STRIM
Funder
VINNOVA, 1832144
Note

Validerad;2018;Nivå 2;2018-12-07 (johcin)

Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2020-02-04Bibliographically approved
Skawina, B., Salama, A., Svanberg, J. & Gustafson, A. (2018). The effects of orepass loss on loading, hauling, and dumping operations and production rates in a sublevel caving mine. The Southern African Journal of Mining and Metallurgy, 118(4), 409-418
Open this publication in new window or tab >>The effects of orepass loss on loading, hauling, and dumping operations and production rates in a sublevel caving mine
2018 (English)In: The Southern African Journal of Mining and Metallurgy, ISSN 2225-6253, E-ISSN 1543-9518, Vol. 118, no 4, p. 409-418Article in journal (Refereed) Published
Abstract [en]

Orepass failure is a well-known problem in deep mines, and the risk of losing an orepass is associated with severe production disturbances. In the near future, one possible scenario in the Loussavaara Kiirunavaara Aktiebolag (LKAB) Malmberget mine is to concentrate the mining operation in fewer, but larger, production areas. In this paper we evaluate the effects of orepass loss on loading, hauling, and dumping operations and production rates using discrete event simulation, by simulating part of the Malmberget mine loading and hauling system under different environmental and operational constraints.

Place, publisher, year, edition, pages
Johannesburg: South African Institute of Mining and Metallurgy, 2018
Keywords
LHDs, orepass loss, production simulation, underground iron ore mining
National Category
Other Engineering and Technologies not elsewhere specified Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-68482 (URN)10.17159/2411-9717/2018/v118n12a14 (DOI)000432973700011 ()2-s2.0-85048012580 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-06-08 (andbra)

Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-06-13Bibliographically approved
Ghosh, R., Danielsson, M., Gustafson, A., Falksund, H. & Schunnesson, H. (2017). Assessment of rock mass quality using drill monitoring technique of Hydraulic ITH drills (ed.). International Journal of Mining and Mineral Engineering, 8(3), 169-186
Open this publication in new window or tab >>Assessment of rock mass quality using drill monitoring technique of Hydraulic ITH drills
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2017 (English)In: International Journal of Mining and Mineral Engineering, ISSN 1754-890X, Vol. 8, no 3, p. 169-186Article in journal (Refereed) Published
Abstract [en]

A rock drilling system always responds to variations in the mechanical properties of the penetrated rock mass. Combining the drill response with a detailed understanding of the drill system has the potential to give a detailed and high-resolution characterisation of the penetrated rock mass along the borehole. This paper analyses 186 boreholes, drilled using a water powered in-the-hole (ITH) drilling technique considering drill parameters; penetration rate, rotation pressure, feed pressure and percussive pressure. In addition, it suggests, calculates and uses a parameter reflecting rock fracturing. Sixty-three of the holes were filmed with a borehole camera to reveal the geo-mechanical features. The results show that the responses from the drill monitoring system can distinguish between solid rock, fracture zones, cavities and damaged rock. The ability to extract this information directly from the drilling operation provides unique prior information and can be useful to adjust production planning before charging and blasting boreholes.

Place, publisher, year, edition, pages
InderScience Publishers, 2017
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-14546 (URN)10.1504/IJMME.2017.10006862 (DOI)2-s2.0-85027419669 (Scopus ID)deb3ea8d-3a3b-4f92-a89c-67863f4661bf (Local ID)deb3ea8d-3a3b-4f92-a89c-67863f4661bf (Archive number)deb3ea8d-3a3b-4f92-a89c-67863f4661bf (OAI)
Note

Validerad;2017;Nivå 1;2017-08-16 (rokbeg)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-11-20Bibliographically approved
Gustafson, A., Paraszczak, J., Tuleau, J. & Schunnesson, H. (2017). Impact of technical and operational factors on effectiveness of automatic load-haul-dump machines. Mining Technology, 126(4), 185-190
Open this publication in new window or tab >>Impact of technical and operational factors on effectiveness of automatic load-haul-dump machines
2017 (English)In: Mining Technology, ISSN 1474-9009, E-ISSN 1743-2863, Vol. 126, no 4, p. 185-190Article in journal (Refereed) Published
Abstract [en]

The use of automatic load-haul-dump (LHD) machines in underground metal mines is a promising way to overcome some of the challenges now facing mining companies. They offer several potential benefits over man-operated units, mostly in terms of safety and health of the workers, but also in terms of higher availability, increased productivity, and reduced mining cost. That said, using such systems at their full capacity is a challenging and complex task. In this context, after describing some commercially available equipment and systems, the paper examines factors affecting reliability, availability and productivity of automatic LHDs and notes several technical and operational concerns.

Place, publisher, year, edition, pages
Taylor & Francis, 2017
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-62122 (URN)10.1080/14749009.2017.1285980 (DOI)2-s2.0-85038357365 (Scopus ID)
Note

Validerad;2018;Nivå 1;2017-12-21 (andbra)

Available from: 2017-02-22 Created: 2017-02-22 Last updated: 2018-04-16Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5347-0853

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