The technique of blast in well combined with gush flushing well by liquid carbon dioxide was studied in karst crack section of well, so as to increage well yield.

• 施工水井时，当钻进到设计井深后，为了增加水井的涌水量，在井内岩溶裂隙段采用井内爆破联合液态二氧化碳井喷洗井的工艺，取得了显著的效果。