When blasting doesn t work, the high efficiency and noiseless breaking substance can be used in tunnel enlarging and basement excavation, and it is worthy of being popularized and applied.

• 本文介绍了在无法使用爆破法施工时,采用高效无声破碎剂扩巷和开挖基础的新技术,具有较高的推广应用价值。