预裂法 meaning in English

precracking
preslitting
presplitting

For reducing cost and accelerating construction speed sparingly , at present in irrigation works construct in producing testing progressively and antiabrasion layer that popularize excavating method competent to split law in advance , flexible cushion layer etc . accumulative charge to vertical hole has been tested in three gorege project only
为了节省施工成本、加快施工进度，目前在水利工程施工生产中逐步试验并推广的保护层开挖方法有水平预裂法，柔性垫层法等。对于垂直孔水平聚能药包爆破用于生产试验仅在三峡进行过。