Assessment of roof fall risk during retreat mining in room and pillar coal mines

Ghasemi, Ebrahim; Ataei, Mohammad; Shahriar, K.; Sereshki, Farhang; Jalali, Seyed Esmaeil; Ramazanzadeh, Ahmad

doi:10.1016/j.ijrmms.2012.05.025

Cited by 94 publications

(47 citation statements)

References 15 publications

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“…As mentioned before, Ghasemi et al (2012) determined the factors and sub-factors affecting roof fall risk during retreat mining. Based on findings of the field investigation, literature review and collected assistant data, they found 15 factors relevant to roof instability.…”

Section: Step 1: Identifying the Factors And Sub-factorsmentioning

confidence: 99%

“…Recently, Ghasemi et al (2012) have carried out a detailed study on roof fall risk in room and pillar coal mines during retreat mining. At first, they identified the major effective parameters on roof fall and explained the role of each one.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, development of methodologies to evaluate the roof fall susceptibility (RFS) seems essential. Ghasemi et al (2012) proposed a systematic methodology to assess the roof fall risk during retreat mining based on risk assessment classic approach. The main defect of this method is ignorance of subjective uncertainties due to linguistic input value of some factors, low resolution, fixed weighting, sharp class boundaries, etc.…”

mentioning

confidence: 99%

“…Dlatego też opracowanie skutecznej metody oceny skłonności stropu do zawału jest kwestią kluczową. Ghasemi et al (2012) zaproponował metodologię określania ryzyka zawału stropu w trakcie prowadzenia prac górniczych w kierunku od pola w oparciu o klasyczne metody oceny ryzyka. Główną wadą tej metody jest to, iż nie uwzględnia ona subiektywnych niepewności na poziomie językowym związanych z określaniem wartości wejściowych charakteryzujących czynniki ryzyka, inne niedociągnięcia to niska rozdzielczość metody, stałe przyporządkowania wag, przyjęcie ostrych granic pomiędzy kolejnymi klasami.…”

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Improving the Method of Roof Fall Susceptibility Assessment based on Fuzzy Approach

Ghasemi

Ataei

Shahriar

2017

Archives of Mining Sciences

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Retreat mining is always accompanied by a great amount of accidents and most of them are due to roof fall. Therefore, development of methodologies to evaluate the roof fall susceptibility (RFS) seems essential. Ghasemi et al. (2012) proposed a systematic methodology to assess the roof fall risk during retreat mining based on risk assessment classic approach. The main defect of this method is ignorance of subjective uncertainties due to linguistic input value of some factors, low resolution, fixed weighting, sharp class boundaries, etc. To remove this defection and improve the mentioned method, in this paper, a novel methodology is presented to assess the RFS using fuzzy approach. The application of fuzzy approach provides an effective tool to handle the subjective uncertainties. Furthermore, fuzzy analytical hierarchy process (AHP) is used to structure and prioritize various risk factors and sub-factors during development of this method. This methodology is applied to identify the susceptibility of roof fall occurrence in main panel of Tabas Central Mine (TCM), Iran. The results indicate that this methodology is effective and efficient in assessing RFS.Keywords: Coal mining; Room and pillar; Retreat mining; Roof fall susceptibility (RFS); Analytical hierarchy process (AHP); Risk assessment fuzzy approach Wybieraniu w kierunku od pola towarzyszy zazwyczaj większa ilość wypadków, większość z nich spowodowana jest zawałem stropu. Dlatego też opracowanie skutecznej metody oceny skłonności stropu do zawału jest kwestią kluczową. Ghasemi et al. (2012) zaproponował metodologię określania ryzyka zawału stropu w trakcie prowadzenia prac górniczych w kierunku od pola w oparciu o klasyczne metody oceny ryzyka. Główną wadą tej metody jest to, iż nie uwzględnia ona subiektywnych niepewności na poziomie językowym związanych z określaniem wartości wejściowych charakteryzujących czynniki ryzyka, inne niedociągnięcia to niska rozdzielczość metody, stałe przyporządkowania wag, przyjęcie ostrych granic pomiędzy kolejnymi klasami. Aby usunąć te niedociągnięcia i w ten sposób udoskonalić metodę, zaproponowano nowe podejście do określania stabilności stropu wykorzystujące elementy logiki rozmytej. Zastosowanie logiki rozmytej jest efektywnym narzędziem w przypadku niepewności na poziomie językowym. Ponadto podejście bazujące na określeniu hierarchii procesów i wykorzystujące elementy logiki rozmytej zastosować można do określania wagi poszczególnych czynników ryzyka oraz czynników cząstkowych. Opracowaną metodę zastosowano do oceny skłonności stropu do zawału w polu głównym wybierania w kopalni Tabas Central Mine, w Iranie. Uzyskane wyniki potwierdzają skuteczność metody prognozowania stabilności stropu.Słowa kluczowe: górnictwo węgla, wybieranie filarowo-komorowe, wybieranie w kierunku od pola, podatność stropu na zawał, analityczne badanie hierarchii procesów, ocena ryzyka z wykorzystaniem elementów logiki rozmytej

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Section: Step 1: Identifying the Factors And Sub-factorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Improving the Method of Roof Fall Susceptibility Assessment based on Fuzzy Approach

Ghasemi

Ataei

Shahriar

2017

Archives of Mining Sciences

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“…Additionally, the coal pillars creep over time and gradually fail (Bell and Bruyn, 1999;Castellanza et al, 2008). During pillar failure, the roof strata become fractured and the collapse progresses upwards (Ghasemi et al, 2012;Cui et al, 2014;Parise et al, 2015). Finally, surface subsidence results in building damage, environmental destruction, etc.…”

Section: Introductionmentioning

confidence: 99%

Roadway backfill method to prevent geohazards induced by room and pillar mining: a case study in Changxing coal mine, China

Zhou

Meng

Zhang

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. Coal mines in the western areas of China experience low mining rates and induce many geohazards when using the room and pillar mining method. In this research, we proposed a roadway backfill method during longwall mining to target these problems. We tested the mechanical properties of the backfill materials to determine a reasonable ratio of backfill materials for the driving roadway during longwall mining. We also introduced the roadway layout and the backfill mining technique required for this method. Based on the effects of the abutment stress from a single roadway driving task, we designed the distance between roadways and a driving and filling sequence for multiple-roadway driving. By doing so, we found the movement characteristics of the strata with quadratic stabilization for backfill mining during roadway driving. Based on this research, the driving and filling sequence of the 3101 working face in Changxing coal mine was optimized to avoid the superimposed influence of mining-induced stress. According to the analysis of the surface monitoring data, the accumulated maximum subsidence is 15 mm and the maximum horizontal deformation is 0.8 mm m −1 , which indicated that the ground basically had no obvious deformation after the implementation of the roadway backfill method at 3101 working face.

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Research on Coal Mine Gas Safety Evaluation Based on D-S Evidence Theory Data Fusion

Sun

Liu

Hou

2020

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Assessment of roof fall risk during retreat mining in room and pillar coal mines

Cited by 94 publications

References 15 publications

Improving the Method of Roof Fall Susceptibility Assessment based on Fuzzy Approach

Improving the Method of Roof Fall Susceptibility Assessment based on Fuzzy Approach

Roadway backfill method to prevent geohazards induced by room and pillar mining: a case study in Changxing coal mine, China

Research on Coal Mine Gas Safety Evaluation Based on D-S Evidence Theory Data Fusion

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