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Geotechnical and Geological Engineering

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03-11-2022 | Original Paper

Numerical Study of the Roof Fall and Out of Seam Dilution and Their Event Risk in a Mechanized Longwall Panel

Authors: Hossein Arasteh, Gholamreza Saeedi, Mohammad Ali Ebrahimi Farsangi

Published in: Geotechnical and Geological Engineering | Issue 2/2023

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Abstract

Longwall mining operation is mainly accompanied by the roof fall phenomenon and out of seam dilution (OSD). These occurrences are strongly dependent on the quality of the face's roof and floor. Therefore, the existence of discontinuities in the floor and roof reduces their quality, increasing the intensity of roof fall and OSD. This paper suggests a synthetic rock mass (SRM) model which is able to simulate roof behavior by initiating and tracking of fractures in cave mining, in order to predict the roof fall and OSD and to evaluate their event risk. For this purpose, longwall mining, including excavation of coal, installation of powered support, and caving the roof, has been successfully established in this numerical model using the PFC2D approach. The risk analysis in a panel of Tabas mine using the matrix risk model indicated that the risk level of roof fall is moderate and the risk level of OSD is high. The results of SRM modeling are consistent with previous studies and field observations at the Tabas coal mine, indicating that the SRM model is a powerful technique for studying the behavior of discontinuities in mining.

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Aghababaei S, Rashkolia GS, Jalalifar H (2020) Risk analysis of roof fall and prediction of damaged regions at retreat longwall coal mining face. Rudarsko-geološko-naftni zbornik (The Mining-Geological-Petroleum Bulletin) 35(3). https://doi.org/10.17794/rgn.2020.3.9

Arasteh H, Esmaeili K, Saeedi GH, Ebrahimi MA (2022) Discontinuous modeling of roof strata caving in a mechanized longwall mine in tabas coal mine. Int J Geomech 22(5):04022040CrossRef

Bai Q, Tu S (2020) Numerical observations of the failure of a laminated and jointed roof and the effective of different support schemes: a case study. Environ Earth Sci 79:1–18CrossRef

Barczak TM, Schwemmer DE (1988) Stiffness characteristics of longwall shields. United State Department of the interior, Bureau of Mines, Report of Investigation, RI9154. p 14

Cai M, Kaiser P (2006) Visualization of rock mass classification systems. Geotech Geolog Eng 24(4):1089–1102CrossRef

Cai M, Kaiser PK, Uno H, Tasaka Y, Minami M (2004) Estimation of rock mass deformation modulus and strength of jointed hard rock masses using the GSI system. Int J Rock Mech Min Sci 41(1):3–19CrossRef

Chugh Y, Moharana A, Patwardhan A (2004) An analysis of the effect of out-of-seam dilution on coal utilization. Proceedings of the 5th international conference on clean technologies for the mining industry, University of Concepcion, Chile. p. 18–21

Chugh Y, Moharana A, Patwardhan A (2005) Dilution in underground coal mining in USA impacts on production, processing and waste disposal. In: Proceedings of the international seminar on mineral processing technology. New Dehli, India, pp 10–20

Cundall PA, Pierce ME, Mas Ivars D (2008) Quantifying the size effect of rock mass strength. In 1st southern hemisphere international rock mechanics symposium. Perth: Australian centre for geomechanics

Deb D (2003) Analysis of coal mine roof fall rate using fuzzy reasoning techniques. Int J Rock Mech Min Sci 40:251–257CrossRef

Esmaieli K, Hadjigeorgiou J, Grenon M (2010) Estimating geometrical and mechanical REV based on synthetic rock mass models at Brunswick Mine. Int J Rock Mech Min Sci 47(6):915–926CrossRef

Ghasemi E, Ataei M, Shahriar K, Sereshki F, Ramenzanzadeh JSE, A, (2012) Assessment of roof fall risk during retreat mining in room and pillar coal mines. Int J Rock Mech Min Sci 54:80–89CrossRef

Hoek E (1994) Strength of rock and rock masse. News J Int Soci Rock Mech 2(2):4–16

Hoek E, Brown ET (1997) Practical estimates of rock mass strength. Int J Rock Mech Min Sci 34(8):1165–1186CrossRef

IRASCO, IRITEC, and Cementation SKANSKA (2005) Basic Design Report. Vol. 2 to 5. Parvadeh, Tabas Coal Mine Project, Iran

Itasca Consulting Group Inc (2010) PFC2D-Particle Flow Code in Two Dimensions. Ver. 4.0 User's Manual. ICG, Minneapolis

Marinos P, Hoek E (2000) GSI: a geologically friendly tool for rock mass strength estimation. In: ISRM international symposium. International society for rock mechanics and rock engineering.‏ Melbourne. Technomic publishers, Lancaster, pp. 1422–1446

Marinos P, Hoek E (2001) Estimating the geotechnical properties of heterogeneous rock masses such as flysch. Bull Eng Geol Environ 60(2):85–92CrossRef

Mas Ivars D, Pierce ME, Darcel C, Reyes-Montes J, Potyondy DO, Paul Young R, Cundall PA (2011) The synthetic rock mass approach for jointed rock mass modelling. Int J Rock Mech Min Sci 48(2):219–244. https://doi.org/10.1016/j.ijrmms.2010.11.014CrossRef

Molinda GM, Mark C, Dolinar D (2000) Assessing coal mine roof stability through roof fall analysis. In: Proceedings of the new technology for coal mine roof support. US Department of health and human services, centers for disease control and prevention. National Institute for occupational safety and health, NIOSH Publication. 9453, 53–72.

Noppe M (2003) The measurement and control of dilution in an underground coal operation. In: Proceedings of the 5th mining geology conference. Bendigo, Australia. p. 243–9

Noroozi A, Oraee K, Javadi M, Goshtasbi K, Khodadady H (2012) A model for determining the breaking characteristics of immediate roof in longwall mines. Yerbilimleri 33(2):193–203

Pakalnis RC, Poulin R, Hadjigeorgiou J (1996) Quantifying the cost of dilution in underground mines. Int J Rock Mech Min Sci Geomech Abst 5(33):233

Pakalnis RC, (1986). Empirical stope design in Canada. PhD thesis, University of British Columbia, Vancouver, 276 p.

Palmstrom A (2005) Measurements of and correlations between block size and rock quality designation (RQD). Tunn Undergr Space Technol 20(4):362–377CrossRef

Palmstrom A (1995) RMi-a rock mass characterization system for rock engineering purposes.

Peng SS (2020) Longwall mining, 3rd edn. CRC Press, Balkema, pp 181–215

Pierce ME, Mas Ivars D, Sainsbury D (2009) Use of Synthetic rock masses (SRM) to investigate jointed rock mass strength and deformation behavior. In Proceedings of the International Conference on Rock Joints and Jointed Rock Masses, pp. 1–6. Tucson

Planeta S, Bourgoin C, Laflamme M (1990) The impact of rock dilution on underground mining: operational and financial considerations. In: Proceedings of the 92nd CIM annual general meeting. Ottawa

Popov G (1971) The working of mineral deposits. Translated: V. Shiffer, Mir Publishers Moscow

Poulsen BA, Adhikary DP, Elmouttie MK, Wilkins A (2015) Convergence of synthetic rock mass modelling and the Hoek-Brown strength criterion. Int J Rock Mech Min Sci 80:171–180CrossRef

Razania M, Yazdani-Chamzini A, Haji Yakhchali S (2013) A novel fuzzy inference system for predicting roof fall rate in underground coal mines. Saf Sci 55:26–33CrossRef

Saeedi G, Rezai B, Shahriar K, Oraee K, Karpuz C (2009) A method to relate the affecting parameters and estimate dilution in coal mines. J Appl Sci 9(14):2556–2566CrossRef

Saeedi G, Shahriar K, Rezai B (2013) Estimating volume of roof fall in the face of longwall mining by using numerical methods. Arch Min Sci 58(3):767–778

Sainsbury B, Pierce M, Ivars DM (2008) Simulation of rock mass strength anisotropy and scale effects using a Ubiquitous Joint Rock Mass (UJRM) model. The First international FLACDEM symposium on numerical modeling, 1–10

Seedsman RW (2013) Practical strength criterion for coal mine roof support design in laminated soft rocks. Min Technol 122(4):243–249CrossRef

Shahriar K, Amoushahi S, Arabzadeh M (2009) Prediction of surface subsidence due to inclined very shallow coal seam mining using FDM.‏ Proc., Coal 2009: Coal Operators’ Conf., N. Aziz, ed., Univ. of Wollongong, Wollongong, Australia, 130–139

Suddle S (2009) The weighted risk analysis. Saf Sci 47(5):668–679CrossRef

Tadolini SC, Dolinar DR (2001) Enhanced surface control for roof and rib support. Proceedings of the 20th International conference on ground control in mining; Morgantown, WV. pp. 173–179.

Turichshev A, Hadjigeorgiou J (2015) Experimental and numerical investigations into the strength of intact veined rock. Rock Mech Rock Eng. https://doi.org/10.1007/s00603-014-0690-x

Vallejos JA, Suzuki K, Brzovic A, Ivars DM (2016) Application of synthetic rock mass modeling to veined core-size samples. Int J Rock Mech Min Sci 81:47–61. https://doi.org/10.1016/j.ijrmms.2015.11.003CrossRef

Wang G, Wu M, Wang R, Xu H, Song X (2017) Height of the mining-induced fractured zone above a coal face. Eng Geol 216:140–152CrossRef

Zhang Y, Stead D (2014) Modelling 3D crack propagation in hard rock pillars using a synthetic rock mass approach. Int J Rock Mech Min Sci 72:199–213. https://doi.org/10.1016/j.ijrmms.2014.09.014CrossRef

Zhang Y, Zhao X (2016) Characterisation of confinement effect on jointed rock pillars using a synthetic rock mass approach. Int J Numer Anal Methods Geomech 40:1690–1711CrossRef

Zhang Y, Stead D, Elmo D (2015) Computers and geotechnics characterization of strength and damage of hard rock pillars using a synthetic rock mass method. Comp Geotech 65:56–72. https://doi.org/10.1016/j.compgeo.2014.12.002CrossRef

Zhang P, Van Dyke M, Su D, Esterhuizen E, Trackemas J (2018) Roof failure in longwall headgates, Causes, risks and prevention. American rock mechanics association. Document ID: ARMA-2018–956.

Title: Numerical Study of the Roof Fall and Out of Seam Dilution and Their Event Risk in a Mechanized Longwall Panel
Authors: Hossein Arasteh
Gholamreza Saeedi
Mohammad Ali Ebrahimi Farsangi
Publication date: 03-11-2022
Publisher: Springer International Publishing
Published in: Geotechnical and Geological Engineering / Issue 2/2023
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-022-02317-0

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