苏联在几年以前就开始采用爆破法开凿筒井。在我国也有一些地区采用爆破法凿井,又快又省,在抗旱当中可以提倡。方法是、先用井锥或钻钻一个细的并孔,深度要达到预定的井底以下,然后填入炸药,再将井孔上口用土封好,引发炸药进行爆破。爆破以后钻孔胀大,形成井筒。因为筒壁土壤在爆破时被挤压密实,如果是粘土、粘壤土、黄土、灰泥等土质,炸出的井壁不需加固就可使用。为了增大井的出水量,还可 A few years ago the Soviet Union started to blast the tube by blasting. In some areas of our country, the blasting method has been used to drill shafts, which are quick and easy, and can be advocated during the drought. The method is to first drill a thin hole with a cone or a drill to reach a predetermined depth below the bottom of the well, then fill in the explosive, and then seal the well with a well to initiate explosives explosions. Drilling after blasting swelled to form a wellbore. Because the wall of the soil in the blasting is squeezed dense, if it is clay, clay loam, loess, stucco and other soil quality, without the need to reinforce the blown wall can be used. In order to increase the well water, but also