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扩孔形成具有最佳外形的深孔药包，是提高爆破效率的一个途径。在热力扩孔的基础上，这一实际课题已被有效解决。在这种情况下，药包的这种或那种优化形状都应保证爆破的有益效应，如减少不合格大块出率和很高矿岩破碎程度等得到可靠的增强。国立莫斯科矿业大学（yrrr），进行
Reaming to form the best shape of the deep hole kits, is to improve the blasting efficiency of a way. On the basis of thermal reaming, this practical issue has been effectively solved. In this case, one or more optimized shape of the pack should ensure the beneficial effects of blasting, such as the reduction of unacceptable bulk yield and the high degree of crushing of the ore rock. National Moscow Mining University (yrrr), carried out