Risk assessment by fault tree analysis of roof and rib fall accidents in an underground hard coal mine

Download
index.pdf
2015
Direk, Cansu
Show full item record
241
views
128
downloads
Mining sector has a high rate of injury and fatality among other sectors. Roof and rib fall in underground mines is one of the most commonly encountered accident causes that results in injuries, permanent disabilities, even fatalities. Implementing effective prevention measures based on the quantitative risk assessment is an emerging issue for underground coal mines in Turkey. The main objective of this study is to determine the root causes of roof and rib fall accidents in underground coal mines by implementing quantitative risk assessment. This objective was achieved by evaluating the accidents occurred due to roof and rib falls from years 2003 to 2013 in the selected pilot research area, Turkish Hard Coal Enterprise (TTK) – Amasra Hard Coal Institution. In order to determine root causes of roof and rib falls, fault tree analysis (FTA) methodology was implemented. The methodology starts with the preprocessing of acquired data and determination of the main causes and consequences of roof and rib falls in Amasra underground coal mine. Then intermediate and basic events of fault tree were identified and fault tree for roof and rib fall accidents was generated. The risks associated with each basic event and cuts sets of fault tree were computed using ReliaSoft BlockSim-7 software. Finally, major causes of roof and rib fall accidents were determined according to the computed risks. Research findings revealed that causes with the highest static reliability importance are improper personal protective equipment (PPE), procedural errors, and improper tools. This study, as being the first implementation of FTA in underground roof and rib fall accidents, is expected to contribute to mining industry and current literature in various ways. The developed accident database could be extended further to create a national mine accident database. In future studies, the developed risk analysis methodology could be used in other mines of TTK and also in other underground coal mines to decrease the risk of roof and rib falls and consequently decreasing the injury and fatality rates. The results of this study should be considered in preparing a ground control risk assessment plan for the particular coal mine and other underground hard coal mines as well.
Rock mechanics., Geotechnical engineering.
http://etd.lib.metu.edu.tr/upload/12619416/index.pdf
https://hdl.handle.net/11511/25054
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Penetration rate prediction for diamond bit drilling by adaptive neuro-fuzzy inference system and multiple regressions
BASARIR, HAKAN; Tutluoğlu, Levend; Karpuz, Celal (Elsevier BV, 2014-05-01)
In many mining, civil, and petroleum engineering applications diamond bit drilling is widely used due to high penetration rate, core recovery and its ability to drill with less deviation. Recently, many research have been conducted to estimate the penetration rate of diamond drilling which can be considered as one of the most important parameters in project planning and cost estimation of the operation.
Operation Quality Indicators for Shovel-Truck Systems at Open-Pit Coal Mines
Voronov, Anton; Voronov, Yuri; Voronov, Artyom; Demirel, Nuray (EDP Sciences; 2019-01-01)
Stripping and mining operations at open-pit coal mines are performed mainly by heavy shovel-truck systems (STS). One of the main problems of the STS is a rather low level of its operation quality, an objective assessment of which is an important step in identifying the causes of low quality and effective ways to improve it. The purpose of assessing the STS operation quality is defined as a functional criterion. The next important step of the assessment is to choose the set of indicators that most characteri...
Seismic Risk Assessment of Masonry Buildings in Istanbul for Effective Risk Mitigation
Erberik, Murat Altuğ (SAGE Publications, 2010-11-01)
Unreinforced and non-engineered masonry buildings are highly vulnerable to seismic hazard and constitute a significant percentage of earthquake losses, including both casualties and economic losses. This study presents an engineering application on seismic safety assessment of unreinforced masonry (URM) buildings in Istanbul, Turkey, a metropolitan city under very high seismic risk. Nearly 20,000 masonry buildings were examined through a two-stage assessment procedure in order to identify the addresses of t...
Improving mine-to-mill by data warehousing and data mining
Erkayaoğlu, Mustafa (Informa UK Limited, 2019-08-18)
Mining is an interdisciplinary industry that utilises equipment and technology intensively in daily operations. Mine-to-Mill is considered as a key concept for metal mining recently. Impact of underperformed basic upstream operations such as drilling and blasting will sustain this inefficiency in downstream processes, such as mineral processing. Data provided for each of these operations from software and hardware utilised on field reached a level where advanced data analytics becomes applicable. Data wareh...
Numerical modelling of out-of-seam dilution in longwall retreat mining
SAEEDI, G.; SHAHRIAR, K.; REZAI, B.; Karpuz, Celal (Elsevier BV, 2010-06-01)
Longwall mining is a common mining method in Iran that is often affected by out-of-seam dilution (OSD). The field investigations performed in Tabas coal mine show that OSD often occurs due to roof falls in front of the face area before support setting and also removing some floor material. The increase in unsupported roof span above the shearer may cause difficulty in controlling the roof and consequently increases dilution of the run of mine (ROM) coal. The paper presents the results of a study on some dom...
Citation Formats
C. Direk, “Risk assessment by fault tree analysis of roof and rib fall accidents in an underground hard coal mine,” M.S. - Master of Science, Middle East Technical University, 2015.
METU IIS - Integrated Information Service open@metu.edu.tr