Abstract:Cutting groove is one of the important mining technologies with (without) bottom pillar sublevel caving method, and the quality of groove seriously affects the blasting mining effect, but because of the poor construction safety conditions of soft broken orebody,the ordinary cutting and drawing method is not only difficult to construct, but also difficult to guarantee the labor intensity, low efficiency and high cost of workers. The primary drawing method of middle-deep hole blasting without cutting well is a safe, efficient, simple and reliable cutting method, which has a wide range of popularization and application value.