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| 膨胀剂迫裂法在不许使用炸药爆破或用爆破方法不经济、不安全的情况下，可以用钻孔灌膨胀剂的办法进行开挖和破碎作业。膨胀剂灌人孔中，发生水化反应，放热、固结、体积膨胀，对孔壁施加压力，将孔壁外的岩石、混凝土破裂 | |||
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