A vibration velocity measurement and research of a side blasting with non-floor pillar sublevel caving stoping for transforming opencast mining into underground mining in Daye iron mine is made.

• 对大冶铁矿东露天转地下开采无底柱分段崩落法回采挂帮矿爆破振动速度的测试与研究表明,质点爆破振动速度与单响最大爆破药量、爆心距、炸药种类和堵塞情况有关。