新疆达坂城矿区石灰石露天矿矿体坚硬而非均质,节理裂隙发育,爆破后易产生矿石大块,在近距离爆破振动影响下,会对邻近建筑物及地面附属设施产生破坏影响。根据地面建筑物抗震标准和岩性特点,采用分区、分段间隔孔毫秒微差分层起爆技术,控制单位起爆药量以达到减振降速目的。 The limestone open-pit mine in Dabancheng mining area in Xinjiang is hard and heterogeneous, and the joints and fractures are developed. After the blasting, large ore masses are easy to be produced. Under the influence of short-range blasting vibration, the adjacent buildings and ground attachments will be destroyed. According to the seismic standards and lithology characteristics of the ground buildings, the microsecond differential detonation technique with zoning and sub-interval holes is adopted to control the unit to detonate the dose so as to achieve the purpose of reducing vibration and reducing speed.