Abstract: In the open pit soil-rock blasting process, the blasting effect will have a direct impact on the project construction period, economic benefit and other processes.And various factors such as the structural surface of rock, bedding-joint, air face, hole nets parameters restrict the blasting effect.Effect comparison and blasting experiment on different relationship of spatial position between rock strata dip and bench slop obtain the best position relationship between rock strata dip and bench slop, the hole parameter designs at each position, and the construction working points.

Key words: Rock strata dip, Bench slop, Explosive consumption, Boulder yield