Reasonable coal amount of hydraulic flushing borehole considering creep displacement

doi:10.16265/j.cnki.issn1003-3033.2017.03.020

China Safety Science Journal ›› 2017, Vol. 27 ›› Issue (3): 111-116.doi: 10.16265/j.cnki.issn1003-3033.2017.03.020

• Safety Science of Engineering and Technology • Previous Articles Next Articles

Reasonable coal amount of hydraulic flushing borehole considering creep displacement

LIU Wei^1,2, ZHANG Jingjun^3,4, KANG Fangchao^1,2, WEI Guoying^1,2,3, YAN Jiangwei^1,2,3, JIA Tianrang^1,2,3

1 School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China
2 Research Center of the National Gas Geology and Gas Prevention Engineering, Jiaozuo Henan 454003, China
3 Collaborative Innovation Center of Coal Safety Production of Henan, Jiaozuo Henan 454003, China
4 Shenhuo Coal Power Stock Company,Yongcheng Henan 476600,China

Received:2016-12-24 Revised:2017-02-19 Online:2017-03-28 Published:2020-11-22

Abstract

Abstract: Oversized hydraulic flushing penetration boreholes can easily led to the gas accumulation in the holes,which has became one disaster factor at the heading face in the process of tunneling.To work out a reasonable size for the borhores at the Xuehu coal mine,a numerical simulation by using the model of Cvisc in the FLAC^3D and a field monitoring activity were undertaken. One comparative analysis was conducted between the numerical simulation results and the field monitoring results.The result shows that influenced by the stress of coal steam ,the coal surrounding the borehole turns plastic and has creep characteristics quickly, and moves radially toward the center of the borehole after completion of the hydraulic flushing measures, and that the reasonable coal amount of the hydraulic flushing boreholes in Xuehu coal mining districts is 1.15 t/m.

Key words: hydraulic flushing, gas accumulation, FLAC^3D, crreep characteristics, reasonable amount of coal

CLC Number:

X936

LIU Wei, ZHANG Jingjun, KANG Fangchao, WEI Guoying, YAN Jiangwei, JIA Tianrang. Reasonable coal amount of hydraulic flushing borehole considering creep displacement[J]. China Safety Science Journal, 2017, 27(3): 111-116.

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Reasonable coal amount of hydraulic flushing borehole considering creep displacement

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