Abstract
Ascending mining method is a widely used method in China for coal mine safety. To determine whether ascending mining method can eliminate or reduce the outburst risk or not in Xinzyao Mine, China, a numerical model was built by FLAC3D software to investigate the fracture evolution and accumulation and dissipation law of energy during the process of ascending mining. And a dual water blocking system was used to verify the fracture evolution obtained from the numerical model. The results show that FLAC3D model can predict the fracture evolution in overburden with a reasonable error. The height of water-conducting fractured zone of no. 14-3 coal seam is about 82.5 m, and it increases by 27 % after no. 12-2 coal seam is mined. The largest energy accumulated in no. 12-2 coal seam is about 32.5 kJ/m3 when mining it directly. The energy accumulated in no. 12-2 coal seam decreases by more than 40 % when ascending mining method is adopted. Ascending mining method can effectively eliminate the outburst risk of the upper coal seam. The research is helpful for the determination of ascending mining method and the further study of the prevention mechanism of rock burst.
Similar content being viewed by others
References
Abdellah W, Mitri HS, Thibodeau D et al (2014) Geotechnical risk assessment of mine development intersections with respect to mining sequence. Geotech Geol Eng 32(3):657–671
Chen XH, Li WQ, Yan XY (2012) Analysis on rock burst danger when fully-mechanized caving coal face passed fault with deep mining. Saf Sci 50(4):645–648
Feng GR, Zhang XY, Li JJ et al (2009) Feasibility on the upward mining of the left-over coal above goaf with pillar supporting method. J Chin Coal Soc 34(6):726–730
Gu R, Ozbay U (2015) Numerical investigation of unstable rock failure in underground mining condition. Comput Geotech 63:171–182
Jiang YD, Meng L, Zhao YX et al (2012) The feasibility research on ascending mining under the condition of multi-disturbances. Procedia Environ Sci 12:758–764
Liang S, Li XH, Mao YX et al (2013) Time-domain characteristics of overlying strata failure under condition of longwall ascending mining. Int J Min Sci Technol 23(2):207–211
Liu XS, Tan YL, Ning JG et al (2015) The height of water-conducting fractured zones in longwall mining of shallow coal seams. Geotech Geol Eng 33:693–700
Ning JG, Liu XS, Tan YL (2012) Mechanism of rock-burst prevention by synergizing pressure relief and reinforcement of surrounding rocks with zonal disintegration in deep coal roadway. Disaster Adv 5(4):844–850
Pan Y, Wang ZQ, Li AW (2012) Analytic solutions of deflection, bending moment and energy change of tight roof of advanced working surface during initial fracturing. Chin J Rock Mech Eng 31(1):32–41
Shabanimashcool M, Jing L, Li CC (2014) Discontinuous modelling of stratum cave-in in a longwall coal mine in the arctic area. Geotech Geol Eng 32(5):1239–1252
Singh AK, Singh R, Sarkar M et al (2002) Inclined slicing of a thick coal seam in ascending order: a case study. CIM Bull 95(1059):124–128
Sirait B, Wattimena RK, Widodo NP (2013) Rockburst prediction of a cut and fill mine by using energy balance and induced stress. Procedia Earth Planet Sci 6:426–434
Song DZ, Wang EY, Liu ZT et al (2014) Numerical simulation of rock-burst relief and prevention by water-jet cutting. Int J Rock Mech Min Sci 70:318–331
Tan YL, Zhang Z (2012) Rock burst disaster induced by mining abutment pressure. Disaster Adv 5(4):378–382
Tan YL, Zhao TB, Xiao YX (2010) In situ investigations of failure zone of floor strata in mining close distance coal seams. Int J Rock Mech Min Sci 47(5):865–870
Wang JA, Park HD (2001) Comprehensive prediction of rockburst based on analysis of strain energy in rocks. Tunn Undergr Space Technol 16(1):49–57
Wang HW, Jiang YD, Gao RJ et al (2013) Evolution of energy field instability of island longwall panel during coal bump. Rock Soil Mech 34(S1):479–485
Yang W, Lin BQ, Qu YA et al (2011) Stress evolution with time and space during mining of a coal seam. Int J Rock Mech Min Sci 48:1145–1152
Yu ZX, Kulatilake PHSW, Jiang FX (2012) Effect of tunnel shape and support system on stability of a tunnel in a deep coal mine in China. Geotech Geol Eng 30(2):383–394
Yu Q, Ma JR, Shimada H et al (2014) Influence of coal extraction operation on shaft lining stability in eastern chinese coal mines. Geotech Geol Eng 32(4):821–827
Zhang DM, Qi XH, Yin GZ et al (2013) Coal and rock fissure evolution and distribution characteristics of multi-seam mining. Int J Min Sci Technol 23(6):835–840
Zhao YX, Jiang YD, Wang T et al (2012) Features of microseismic events and precursors of rock burst in underground coal mining with hard roof. J Chin Coal Soc 37(12):1960–1966
Zhou GW, Liu WG, Jiang YD et al (2008) Characteristics of energy accumulation and release of rock outburst in mining face. J Min Saf Eng 25(1):73–77
Acknowledgments
This work was supported by National Natural Science Foundation of China (Nos. 51274133, 51474137, 51344009, 51574154), Shandong Province Natural Science Fund (No. ZR2012EEZ002), Doctoral Scientific Fund Project of the Ministry of Education of China (No. 20123718110013) and Open Fund of State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology (No. MDPC2013KF12).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Liu, X.S., Tan, Y.L., Ning, J.G. et al. Fracture Evolution and Accumulation and Dissipation Law of Energy During Ascending Mining. Geotech Geol Eng 34, 647–655 (2016). https://doi.org/10.1007/s10706-015-9973-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10706-015-9973-6