Analysis of Explosion Stress Field of Air Radial Decoupling Charge
Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing, 100083, China
Guizhou Institute of Technology, Guiyang, 550003, China
Kunming University of Science and Technology, Kunming, 650093, China
Autor do korespondencji
Deqiang Yang   

Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing, 100083, China
Mining Science 2020;27:19-38
In order to study the effect of air radial decoupling charge on blasting excavation effect of slope, the effect of radial decoupling coefficient on explosive stress field in rock mass is analyzed theoretically. ANSYS/LS-DYNA software is used to establish a numerical model for stress monitoring of monitoring points. At the same time, the concrete model is poured, the explosion stress field around the blast hole is measured by means of the high-speed multi-channel dynamic stress testing system, and the monitoring results of the two methods are compared with the theoretical analysis results. The results show that with the increase of the radial decoupling coefficient of blasting, the peak value of explosive stress at the same side point decreases obviously, and with the increase of the distance, the stress attenuation becomes slower. Applying the test results to the blasting of slope, it is found that the blasting effect is the best when the aperture decoupling coefficient is 2.75 and the hole spacing is 1.0 m, and the larger the hole spacing is, the less obvious the blasting crack is, which has certain guiding significance for improving the blasting effect.
XU L.S., WANG Z.Z., YANG Z.F. et al., 2011, Intermediate coupling device for inclined hole non-coupling charge, China, 201120078082.3.2011-11-09.
QU Y.D., WU M., KONG X.Q. et al., 2014, Numerical simulation of continuation and interval loading in deep-hole blasting, Blasting, Vol. 31, No. 4, 16–21.
YANG G.L., YANG R.S., JIANG L.L., 2012, Pressure distribution along borehole with axial air-deck charge blasting, Explosion and Shock Waves, Vol. 32, No. 6, 653–657.
LING W.M., 2004, Experimental research on explosion pressure on the wall of a borehole in rock, Mining and Metallurgy, Vol. 13, No. 4, 13–16.
YANG X.L., ZHU Y., 1996, Lumpiness problem in coal mining, Coal, Vol. 5, No. 1, 33–35.
WAN Y.L., WANG S.R., 2003, Analyse of impact pressure about de-coupling charge, Blasting, Vol. 18, No. 1, 13–15.
NI Z.F., LI Y.M., 1996, Theoretical calculation and regression on initial shock wave pressure of borehole.
in rock blasting, Journal of Rock Mechanics and Engineering, Vol. 15, No. S1, 511–514.
XU Y., ZONG Q., 2001, Theory and application of blasting in underground engineering, University of Mining and Technology Press, Xuzhou, China.
WANG X.G., 2010, Development of a new coal permitted detonating cord, Anhui University of Science and Technology, Huainan.
WANG W. L., 1980, Drilling and blasting, China Coal Industry Publishing House, Beijing, China.
NIU Q., 1990, Mechanism of rock blasting, Northeast Institute of Technology Press, Shenyang.
HAN B., 2013, Model experimental study and application of deep-hole blasting in hard rock for mine shaft, Anhui University of Science and Technology, Huainan.
MA J.J., XIONG Z.Z., DUAN W.D. et al., 2001, Theoretical testing study factors affecting parallel hole cut blasting, Journal of University of Science and Technology (Natural Science Edition), Vol. 24, No. 2, 170–174.
ZONG Q., 2004, Tunneling blasting parameters model experiment study on vertical well freezing soil, University of Science and Technology China, Hefei.
YANG J.R., 1996, A new constitutive model for blast damage, Int. J. Rock Mech. Min. Sci. and Geomech. Abstr., Vol. 33, No. 3, 245–254.
PREECE D.S., THOME B.J., 1996, A study of detonation timing and fragmentation using 3-d finite element techniques and a damage constitutive model, Mohanty (Ed.), Rock Fragmentation by Blasting, Rotterdam, Vol. 33, No. 3, 147–156.
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