洞外大间隔等微差爆破技术的应用

LONG SPACED EQUAL-DIFFERENTIAL BLASTINGTECHNIQUE APPLIED AT OUTSIDE OF TUNNEL

本文从工艺原理、适用范围、特点、工艺技术等几方面，介绍了洞外大间隔等微差爆破这一近几年发展起来的爆破新技术。并通过一些实例提供了一些具体的技术指标和社会经济效益分析，对于今后对该技术的选择与应用均有借鉴价值。

The long-spaced equal-differential blasting at outside of tunnel is a new blastingtechnique developed in recent years. The paper introduces its technologic principle,applica-tion scope,characteristics,construction technique,etc.Based on experimental examples,sev-eral specific technical idexes are suggested and the social economy benefits are analyzed.Theyare valuable as reference for selection and application of this new technique.