80.采用爆破法清除井底孤石与胶结石时,怎样避免石子乱飞现象?首先应控制装药量,一般一炮只需半纸袋药,重量约为100克,同时用草垫覆盖。但最好还是停止抽水,让水位上升2～3米再引爆,用水作覆盖层,效果较好。 80. When blasting method is used to remove the solitary stones and cement stones in the wellbore, how to avoid the flying phenomenon of stones? Firstly, the amount of charge should be controlled. Generally, only one half of a bag of medicine can be used for one shot and the weight is about 100 grams. At the same time, it is covered with straw mats. However, it is better to stop pumping, so that the water level rises 2 to 3 meters before detonating, and water is used as a cover layer, which is better.