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In order to improve the effect of deep-hole bench blasting in open-pit mines, a buffer blasting technique was proposed based on the on-site investigation of existing bench blasting parameters and rock fragmentation. In combination with simulation study by using LS-DYNA software and theoretical calculation, optimal borehole parameters and buffer thickness were finally determined, which were applied into the field blasting experiment. With buffer thickness of 5 m, borehole spacing of 5 m and burden of 4 m, the field blasting experiment brought an average fragmentation of less than 7%, showing a good blasting effect.

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为了提高露天矿山深孔台阶爆破质量，通过对某矿区现有台阶爆破参数和大块率进行现场调研，提出压渣爆破技术方案，结合LS-DYNA软件仿真分析与理论计算，得到适宜的孔网参数和压渣厚度，并将该参数应用于现场爆破试验。结果表明，压渣厚度5 m、孔间距5 m、抵抗线4 m为适宜爆破参数，该条件下现场爆破试验平均大块率小于7%，取得了良好的爆破效果。

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崔年生（1969—），男，江西宁都人，高级工程师，主要从事矿山与爆破工程方面施工与研究。

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崔年生（1969—），男，江西宁都人，高级工程师，主要从事矿山与爆破工程方面施工与研究。

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