| 摘要 |
PURPOSE: A slight vibration bedrock blasting method is provided to make blasting vibration minutely using hydraulic action of a fluid, to prevent a loud blasting sound and to improve blasting efficiency of bedrock remarkably by synergism with continuous explosion from the uppermost layer. CONSTITUTION: A slight vibration bedrock blasting method comprises the steps of; charging a blasting unit comprising an explosive capsule (A), a sandbag (B) and a fluid tube (C) into a blast-hole (2) bored on a bedrock (1) in multi-layer; sealing up the opening of the blast-hole (2) with many sealing materials (D1-D5); exploding by igniting a detonator (2) installed only to explosive capsules (A1) of the uppermost blasting units (A1, B1, C1), so that explosive capsules (A2-A4) of the following blasting units are exploded due to the shock of explosion of each upper layer continuously by minute time differences.
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