Numerical Simulation of Outburst Prevention Effect of High-Pressure Mini-Jet Fracturing Coal

Abstract:

Through ANSYS/LS-DYNA simulates mini-jet fracturing coal effect, this paper verifies that high-pressure mini-jet forms ahead hole on working face coal, which increases coal exposing area and relieves pressure inside the coal bed to creative conditions for gas relieving and flowing. Additionally underground stress, the coal around hole shifts to the hole space and enlarges the hole relieving pressure and gas exhausting scope further, which removes the coal outburst potential within the control scope and provides theoretical basis for studing the equipment of high-pressure mini-jet cutting hole against outburst.

• Periodical: Applied Mechanics and Materials (Volumes 182-183)
• Pages: 1338-1342
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.182-183.1338
• Online since: June 2012
• Authors: Xue Min Gong, Jia Yong Zhang, Li Wen Guo
• Keywords: ANSYS, Coal and Gas Outburst, High-Pressure Mini-Jet, Numerical Simulation

References

[1] WEI Guoying, GUO Zhonghai, XIE Lun rong, et al. Hydraulic slotting technology to prevent coal and gas outburst during heading excavation [J]. Journal of China coal society, 2007, 32(2)：173–178.(in Chinese)

[2] LIN Baiquan, LU Youchang, LI Baoyu, et al. High-pressure abrasive hydraulic cutting seam technology and its application in outbursts prevention [J]. Journal of China coal society, 2007, 32(9)：959–965.(in Chinese)

[3] CHANG Zongxu, XIBaoping, ZHAO Yangsheng, et al. Mechanical of breaking coal by water jet [J]. Journal of China coal society, 2008, 33(9)：983–988.(in Chinese)

[4] LI Gensheng, LIAO Hualin, HUANG Zhongwei, et al. Rock damage mechanisms under ultra-high pressure water jet impact [J]. Journal of mechanical engineering, 2009, 45(10)：284–294.(in Chinese)

DOI: 10.3901/jme.2009.10.284

[5] LIU Ximing, ZHOU Jing, et al. Study on the mechanism of preventing coal and gas outburst by hydraulic cutting [J]. Mining R & D, 2009, 24(4)：72–74.(in Chinese)

[6] LU Yiyu, GE Zhaolong, LI Xiaohong, et al. Study on main factors of rock breakage with high-pressure cavitating water jets [J]. Journal of SICHUAN university (engineering science edition), 2009, 41(6)：1–5.(in Chinese)

[7] LI Zhonghua, PAN Yishan, ZHANG Xiao, et al. Mechanism of releasing pressure by high-pressure water jet applied to cutting coal seam [J]. Journal of LIAONING technical university(natural science), 2009, 28(1)：44–47.(in Chinese)

[8] ZHOU Dongping, LU Yiyu, KANG Yong, et al. Mechanism and application of protection against outburst for abrasive water jet slotting technology [J]. Journal of CHONGQING university, 2010, 33(7)：86–91.(in Chinese)

[9] LIU Mingju, ZHAO Wenwu, LIU Yanwei, et al. Research and application of hydraulic flushing Borehole to quick1y Elim inate outburst [J]. Coal Science and Technology, 2010, 38(3)：58–62.(in Chinese)