Study on mechanism of deep-hole controlled blasting in coal seam

doi:10.16265/j.cnki.issn1003-3033.2017.09.024

Abstract

Abstract: In order to prevent and control coal gas outburst and other gas disaster accidents by using the deep-hole controlled blasting technology, the mechanism of the deep-hole controlled blasting technology was studied by means of numerical analyses, laboratory tests and theoretical analyses. Both blasting with control hole and blasting without control hole were simulated numerically by using 3D numerical analysis software ANSYS/LS-DYNA and physically. Incidence and reflection of stress wave at control hole were analyzed theoretically. The results show that the control hole reflects the incident compressive stress wave into a tensile stress wave and produces a tensile action, the control effect is obvious and the inhibition effect on the fracture development in other directions is obvious.

Key words: deep-hole controlled blasting, control hole, mechanism, numerical simulation, explosion stress wave

CLC Number:

X936

ZHANG Shuchuan, ZHU Feihao, GAO Kui. Study on mechanism of deep-hole controlled blasting in coal seam[J]. China Safety Science Journal, 2017, 27(9): 140-145.

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