关键词: 组合岩层, 数值模拟, 双楔形掏槽, 光面爆破

Abstract: Combined with the actual situation of belt conveyer roadway in Yangmei No.five coal mine，a new blasting scheme is proposed for “coal-limestone” composite stratum.Through numerical simulation on the undercutting mode，the blasting energy's transmit is analyzed，and the “double-wedge” cut is put forward.Based on the smooth blasting，periphery hole and satellite hole for different rock stratum in gateway are optimized.At scene observation，the paper adopts blasting vibration testing technique and on-site intuitive measurement.The blasting scheme with the double-wedge cut and the reasonably adjusting periphery hole and satellite hole is determined as final proposal with the shot hole rate of up to about 90%.This scheme effectively improves the footage and ensures the high-speed and efficient drifting of rock roadway.

Key words: Composite stratum, Numerical simulation, Double-wedge cut, Smooth blasting