Failure Mechanism of the High Pressure Water in the Weibei on the Top of the Seams Floor Aquifers

Jump To References Section

Authors

  • Li Ang
     School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054 ,CN
  • Ma Qiang
     School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054 ,CN
  • Kang Li
     School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054 ,CN
  • Ma Li
     Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi’an, Shaanxi, 710021 ,CN
  • Wu Yan
     Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi’an, Shaanxi, 710021 ,CN
  • Li Liang
     School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054 ,CN
  • Cai Lei
     Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Shaanxi Coalfield Geophysical Prospecting and Surveying Group Co. Ltd., Xi’an, Shaanxi, 710006 ,CN
  • Mu Qian
     School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054 China ,CN
  • Chen Jianbo
     School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054 China ,CN

Keywords:

Ordovician limestone confined water; the top rock of an bottom aquiclude; the floor failure mechanism; the coupling action of mine pressure and confined water pressure; the equivalent water pressure

Abstract

Ordovician limestone aquifer of Weibei Chenghe mining area with abundant water, characteristics of water pressure, and No. 5 coal seam floor aquifer from Ordovician limestone top interface is relatively close distance, so it is a threat for No. 5 coal production safety. Before the coal seam mining, the floor water layer of No. 5 coal seam is in a stable equilibrium state. After the coal seam is mined, coal seam floor aquifer will cause the strata above the coal seam floor rock from the top to the bottom of the formation of coal seam floor damage, effective protection of aquifuge and water flowing zone because of the impact force of rock pressure and confined waterpressure. The floor mining failure will occur at the top of the water resisting layer and form the mining failure zone of the floor; at the same time, the change of the mechanical structure of the floor will cause the pressure of the confined water at the bottom of the aquiclude to lead up and down along the primary fracture and form a confined water rising belt. With the continuous exploitation of the coal seam, the mining failure zone of the floor may be connected with the ascending zone of the confined water, thus causing the floor water bursting along the through fracture formed by the mining. The current literature does not give a definite answer about the pressure of water on the floor mining failure with the formation of the influence of mining damage depth in the end how much, but from a simple numerical simulation and physical simulation study cannot fully reveal the phenomenon. Therefore, it is necessary to carry out research on failure mechanism of Ordovician limestone confined water on rock layer at the top of water resisting layer of coal seam floor, and from the point of view of mechanical action mechanism, the influence of confined water pressure on the mining failure depth of bottom plate is analyzed, which makes up the blank in this field. The research results of this paper play a key role in the study of the coupling mechanism between the confined water pressure and the mine pressure for further study and can provide reference for similar coal mines in North China type coalfield.

Downloads

Download data is not yet available.

Downloads

Published

2022-10-20

How to Cite

Ang, L., Qiang, M., Li, K., Li, M., Yan, W., Liang, L., Lei, C., Qian, M., & Jianbo, C. (2022). Failure Mechanism of the High Pressure Water in the Weibei on the Top of the Seams Floor Aquifers. Journal of Mines, Metals and Fuels, 67(5), 269–278. Retrieved from http://informaticsjournals.com/index.php/jmmf/article/view/31552

Issue

Volume 67, Issue 5, May 2019

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

 

References

Li,A.(2015): “Research on mechanism and application of water inrush from coal mining floor on confined water in Weibei coalfield.” Xuzhou: China University of Mining and Technology press, 2015.

Li,A.(2012): “Water Inrush Mechansiam on Seepage and Stress Coupling Damage of Coal Floor under Water Pressure and Its Engineering Application.” Doctoral Dissertation of Xi'an University of Science and Technology, 2012.

Gu,S.C., Li,A., (2011): “Application of mine electric method to probe mine water-conducting or water-bearing structures in potential under coal mining face floor.” The Second International Conference on Mechanic Automation and Control Engineering, MACE 2011. 7213-7219.

Zhao,Q.B, Zhao,X.N., Wu,Q. (2015): “Water burst mechanism of“divided period and section burst” at deep coal floor in North China type coalfield mining area.” Journal of China Coal Society, 2015,40(7):1601-1607.

Yao,B.H., Mao,X.B., Wei,J.P., Wang,D.K. (2014): “Study on coupled fluid-solid model for collapse colu-mns considering the effect of particle transport.” Journal of China University of Mining and Technology, 2014, 43(1):30-35.

Bai,G.L., Liang,B., Li,S.Z. (2009): “An equivalant porous media water rock coupling model impacted by coal mining and its application.” Journal of coal industry, 2009, 34(4):461-465.

Li,A. (2014): “Experimental research of seepage characteristics caused by coal floor rock full of stress and strain process,operated by No.5 taiyuangro-up.” the 3rd ISRM International Young Scholars’ Symposium on Rock Mechanics 2014. 7213-7219.

Zhang,B.L., Guo,W.J., Zhang,X.G., et al (2016): “Development and application of analogue testing system for floor confined water rise in coal mining.” Journal of China Coal Society, 2016, 41(08):2057-2062.

Li,A., Gu,S.C., Chen,F.F. (2014): “Theoreticalanalysis and numerical simulation of destroyed depth of coal seam floor during bearing mining: With seam NO.5 in Dongjiahemine, Chenghe mining area, Shaanxi as example.”Coal Geology & Exploration, 2013,41(4):56~60.

Li,A., Liu,Y., Mou,L. (2015): “Impact of the Panel Width and Overburden Depth on Floor Damage Depth in No. 5 Coal Seam of Taiyuan Group in Chenghe Mining Area.” Electronic Journal of Geotechnical Engineering, 2015, 20(4):1603~1607.

Lu,Y.L., Wang,L.G. (2015): “Numerical simulation of mininginduced fracture evolution and water flow in coal seam floor above a confined aquifer.” Computers and Geotechnics, 2015, 67(4):157-171.

Wang,J.A., Wei,X.H., Ji,H.G.(2012): “Rupture and seepage law of roof-floor strata caused by coal mining between doublebearing aquifers.” 2012, 37(06):891-897.

Duan,H.F., Jiang,Z.Y., Zhang,R., Zhu,S.Y. (2011): “Field measurement and simulation research on failure depth of fully mechanized thin coal seam floor in Yangcun Coal Mine.” Journal of coal industry, 2011, 36(add1):13-17.

Yin,H.Y., Wei,J.C. ,Liliana Lefticariu, Guo,J.B., Xie,D.L., Li,Z.L., Zhao,P. (2016): “Numerical Simulation of Water Flow from the Coal Seam Floor in a Deep Longwall Mine in China.” Computersand Geotechnics, 2016,32(2):243-252.

Zhai,X.R., Zhang,H.M., Dou,Z.S., Wu,J.W., Shen,S.H., Zhou,S.Q. (2016): “Study on fluid-solid coupling m-echanism for water effect of coal floor based on different combination of rock strata.” 2016, 12(7):16-21.

Meng,X.R., Xu,C.H., Gao,Z.N., Wang,X.Q. (2010): “Stress distribution and damage mechanism of mining floor.” Journal of coal industry, 2010 ,35(11):1832-1836.

Zhao,Y.X., Jiang,Y.D., Lv,Y.K., Cui,Z.J. (2013): “Similaraimulation experiment of bi-directional loading for floor destruction rules in coal mining above aquifer.” Journal of China Coal Society, 2013 38(03):384-390.

Ma,Q.Y. (1997): “Study on mining support pressure and motion law of overlying strata[Ph.D. Thesis].”1997.

Liu,Y., Li,A. (2016): “The mechanism and the cont-rol techniques of water and sand inrush in working face of shallow coal seam.” Electronic Journal of Geotechnical Engineering, 2016.21(24):7755-7793.

Liu,W.T., Liu,S.L., Ji,B.J. (2015): “Sensitivity analysis of controlling factors on failure depth of floor based on orthogonal experiment.” Journal of China Society, 2015, 40(9):1995-2001.

Gao,Z.N., Zheng,Z.W., Pan,J.L., Zhang,Y. (2016): “Analysis on mechanical effect and damage mechansim of coal seam floor under the coupling action of mining and confined water.” 2016, 12(3):10-12.

Li,A., Ma,Q., Kang,L., Li,L., Cai,L., Wang,W. (2018): “Evaluation on floor water inrush danger of Weibei during mining over pressurized water and preve-ntion countermeasures to the water disaster.” Journal of Mines, Metals and Fuels, 2018, 66(4):231-244. 23. Li,A., Liu,Y., Mou,L. and Li,K. (2018): “Numerical analysis and case study on the mitigation of mining damage to the floor of no. 5 coal seam of Taiyuan Group by grouting.” J.S.Afr.Inst. Min. Metall, 2018, 118(5):461-470.