硝酸铵膨化技术是一创新技术，创新设计的指导思想是硝酸铵自敏化，硝酸铵自敏化的提出是对国内外传统方法的突破。实施自敏化的技术途径是硝酸铵的膨化，其实质是表面活性技术在粉状炸药中的应用，是一个强制析晶的物理化学过程。文章重点讨论了硝酸铵膨化机理及膨化硝酸铵的技术特征，显示其独特的优点。硝酸铵膨化技术主要应用是岩石膨化硝铵炸药，给出了岩石膨化硝铵炸药的爆炸与物理特征数据，并与其它工业炸药做了比较。同时也推广应用在煤矿许用型炸药中。

The expansion of Ammonium Nitrate (AN) is a novel technology. The guideline of this innovation is the self-sensitization of AN. It is a breakthrough form classic method. The approach to self-sensitization is the expansion of AN. Its essence is a surface active technology applied to powder industrial explosive, and it is a physical chemistry process under coercive crystallization.

In this paper, the mechanism and technical characteristics of expansion are discussed and its unique advantage is shown. The expanding technology of AN is mainly applied to rock expanded AN explosive and its comparison with other industry explosives is given. The expanding technology is also used in manufacturing of permitted explosive for coal mine.