Research on Reasonable Mining Scheme for Coal Recovery in Thick Coal Seam Under Buildings and Other Structures
Authors
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School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China; China University of Mining & Technology ,CN
Minglei Zhanga -
State Key Laboratory of Coal Resources and Safe Ming, School of Mines; China University of Mining & Technology, Xuzhou, 221116 ,CNYidong Zhangb
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School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China; China University of Mining & Technology ,CNMing Ji
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School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China; China University of Mining & Technology ,CNPeng Jiao
Keywords:
Coal recovery; thick coal seam; mining scheme; numerical simulation; physical simulationAbstract
Due to overe xploitation in the last years, coal under buildings and other structures has become a significant resource to maintain the sustainability of coal mines in China. However, buildings and other structures above mining area are easily damaged caused by surface subsidence after mining. In order to recover coal under surface structures and ensure the stability of surface structures, the short-strip coal recovery with backfill method is proposed. By using a numerical simulation, this paper simulates the subsidence of overlying strata to select the mining sequence and the strip width. A reasonable mining sequence is determined and the strip width is primarily selected as 5m or 6m. Afterward a physical simulation is conducted to validate the numerical simulation. And the subsidence law of overlying strata during mining and filling is analyzed for the 5m-width and 6m-width strip respectively. Finally, the reasonable strip width is determined as 6m according to the surface subsidence and production efficiency. By employing the above mining scheme, the surface subsidence and deformation of two surface structures above the mining area of Sima coal mine is predicted, which shows the mining scheme can ensure the stability of two surface structures above mining area. The research results provide a reasonable and reliable reference for coal recovery in thick coal seam under buildings and other structures.
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References
Zhang, J.X.; Miao, X.X.; Mao, X.B.; Chen, Z.W. Research On Waste Substitution Extraction of Strip Extraction Coal-Pillar Mining. China J. Rock Mech. Eng. 2007, 26, 2687-2687.
Chen, S.J.; Yin, D.W.; Cao, F.W.; Liu, Y.; Ren, K.Q. An overview of integrated surface subsidence-reducing technology in mining areas of China. Nat. Hazards 2016, 81:1129-1145. DOI: 10.1007/s11069-015-2123-x
Wang, P.J.; Hu, Z.Q.; Yost, R.S.; Shao, F.; Liu, J.T.; Li, X.Y. Assessment of chemical properties of reclaimed subsidence land by the integrated technology using Yellow River sediment in Jining, China. Environ. Earth Sci. 2016,75:1-15. DOI: 10.1007/s12665-016-5848-2
Li, H.D.; Zhu, W. Pressure way study of coal mining technology and the status of Lu'an mining under the village. Mine. Surv. 2011, 1, 64-65. DOI: 10.3969/ j.issn.1001-358X.2011.01.023
Chen, S.J.; Guo, W.J.; Zhou, H.; Wen, G.H. Structure model and movement law of overburden during strip pillar mining backfill with cream-body. J. China Coal Soc. 2011,36, 1081-1086.DOI: 10.13225/ j.cnki.jccs.2011.07.026
Cao, W.H.; Wang, X.F.; Li, P.; Zhang, D.S.; Sun, C.D.; Qin, D.D. Wide Strip Backfill Mining for Surface Subsidence Control and Its Application in Critical Mining Conditions of a Coal Mine. Sustainability 2018, 10, 700-716, DOI: 10.3390/su10030700.
Yu, Y.; Chen, S.E.; Deng, K.Z.; Wang, P.; Fan, H.D. Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities-A Review. Sustainability 2018, 10, 113-134, DOI: 10.3390/ su10010113.
Xu, J.L., Xuan, D.Y., Zhu, W.B., Wang, X.Z., Wang, B.L., Teng, H. Study and application of coal mining with partial backfilling. J. China Coal Soc. 2015, 40, 1303-1312.DOI: 10.13225/j.cnki.jccs.2015.3055
Farhad, H.M.; Mostafijul, K. The selection of backfill materials for Barapukuria underground coal mine, Dinajpur, Bangladesh: Insight from the assessments of engineering properties of some selective materials. Environ. Earth Sci. 2015, 73, 6153-6165. DOI: 10.1007/ s12665-014-3841-1
Sivakugan, N.; Rankine, R.M.; Rankine, K.J.; Rankine, K.S. Geotechnical considerations in mine backfilling in Australia. J. Clean. Prod. 2006, 14, 1168-1175. DOI: 10.1016/j.jclepro.2004.06.007
Archibald, J.F.; Chew, J.L.; Lausch, P. Use of ground waste glass and normal Portland cement mixtures for improving slurry and paste backfill support performance. CIM Bull 1999, 92, 74-80.
Yang, L.; Qiu, J.P.; Jiang, H.Q.; Hu, S.Q.; Li, H.; Li, S.B. Use of Cemented Super-Fine Unclassified Tailings Backfill for Control of Subsidence Minerals 2017, 7, 216-236; DOI: 10.3390/min7110216
Belem, T.; Benzaazoua, M. Design and application of underground mine paste backfill technology. Geotech. Geol. Eng. 2008, 26, 147-174. DOI: 10.1007/s10706-0079154-3
Morteza, S. A review of underground mine backfilling methods with emphasis on cemented paste backfill. Electron. J. Geotech. Eng. 2015, 20, 5182-5208.
Yilmaz, E.; Belem, T.; Bussière, B.; Mbonimpa, M.; Benzaazoua, M. Curing time effect on consolidation behaviour of cemented paste backfill containing different cement types and contents. Constr. Build. Mater. 2015, 75, 99-111. DOI: 10.1016/ j.conbuildmat.2014.11.008
Simon, D.; Grabinsky, M. Apparent yield stress measurement in cemented paste backfill. Int. J. Min. Reclam. Environ. 2013, 27, 231-256. DOI: 10.1080/ 17480930.2012.680754
Klein, K.; Simon, D. Effect of specimen composition on the strength development in cemented paste backfill. Can. Geotech. J. 2006, 43, 310-324. DOI: 10.1139/t06-005
Bian, Z.F.; Miao, X.X.; Lei, S.G.; Chen, S.E.; Wang, W.F.; Struthers, S. The challenges of reusing mining and mineral-processing wastes. Science 2012, 337, 702-703. DOI: 10.1126/science.1224757
Junker, M.; Witthaus, H. Progress in the research and application of coal mining with stowing. Int. J. Min. Sci. Technol. 2013, 23, 7-12. DOI: 10.1016/j.ijmst.2013.01.002
Zhang, X.; Wang, D.L.; Zhang, M.P.; Xiao, Z.M.; Dong, H.F. Study on influence of gangue filling and interval roadway excavation to surface movement and deformation. Coal Sci. Technol. 2016, 44, 33-38. DOI: 10.13199/j.cnki.cst.2016.12.006
Huang, J.; Tian, C.Y.; Xing, L.F.; Bian, Z.F.; Miao, X.X. Green and Sustainable Mining: Underground Coal Mine Fully Mechanized Solid Dense Stowing-Mining Method. Sustainability 2017, 9, 1418-1436, DOI: 10.3390/su9081418.
Li, M.; Zhang, J.X.; Deng, X.J.; Zhou, N.; Zhang, Q. Method of water protection based bearing strata on solid backfill mining under water and its application. J. China Coal Soc. 2017, 42, 127-133. DOI: 10.13225/ j.cnki.jccs.2016.5039
Wang, X.F.; Qin, D.D.; Zhang, D.S.; Sun, C.D.; Zhang, C.G.; Xu, M.T.; Li, B. Mechanical Characteristics of Super high-Water Content Material Concretion and Its Application in Longwall Backfilling Energies 2017, 10, 1592; DOI:10.3390/en10101592
Sun, X.K.; Wang, W. Theoretical research on high water material replacement mining the strip coal pillar above confined aquifer. J. China Coal Soc. 2011, 36, 909-913. DOI:10.13225/j.cnki.jccs.2011.06.018
Li, H.Z.; Guo, G.L.; Zhai, S.C. Mining scheme design for super-high water backfill strip mining under buildings: a Chinese case study.Environ. Earth Sci. 2016, 75, 1017 DOI: 10.1007/s12665-016-5837-5
Luan, H.J.; Jiang, Y.J.; Lin, H.L.; Wang, Y.H. A New Thin Seam Backfill Mining Technology and Its Application. Sustainability 2017, 10, 2023-2039, DOI: 10.3390/en10122023
Sun, Q.; Zhang, J.; Zhou, N. Study and discussion of short- strip coal pillar recovery with cemented paste backfill[J]. Int. J. Rock Mech. Min. Sci., 2018, 104:147-155. DOI: 10.1016/j.ijrmms.2018.01.031
Huang, C.L. Study of impacts to geological environments by coal mining activities in Luan mining area. China University of Mining and Technology(Beijing), Beijing, China, 2013.
Sun, Q.; Zhang, J.X.; Yin, W.; Zhou, N.; Liu, Y. Study of stability of surrounding rock and characteristic of overburden strata movement with longwall roadway backfill coal mining. J. China Coal Soc. 2017, 42, 404-412. DOI:10.13225/j.cnki.jccs.2016.6019
Liu, J.B. Three-dimensional geological Modeling and mining subsidence laws based on thick unconsolidated layer. Doctoral Thesis. China University of Mining and Technology (Beijing), 2014.
