我矿石灰石工区使用的主要穿孔设备,是宣化风动工具厂生产的YQ—150A型露天潜孔钻机。随着矿山建设的飞速发展,生产台阶不断形成,一些边角地方的穿孔是潜孔钻难能实现的,况且爆破后的台阶常会留下底角,单靠小凿岩机清理十分困难,影响二次放炮,为此,1974年在矿党委领导下,坚持党的基本路线,发动群众,大搞技术革新,将YQ—150A型钻机改成适合打底眼的潜孔钻机,经一年多的生产实践证明效果较好。 The main perforation equipment used in the mine limestone work area is YQ-150A open-air DTH drilling rig produced by Xuanhua Fengdong Tools Factory. With the rapid development of mine construction, production steps continue to emerge. Some perforations at corners are difficult to achieve through the use of down-the-hole drills. In addition, the bench bottom after blasting often leaves the bottom corner. It is very difficult to clean with a small rock drill alone, In 1974, under the leadership of the coal mine party committee, the party adhered to the party’s basic line, mobilized the masses and vigorously promoted technological innovations in 1974. After converting the YQ-150A drilling rig into a downhole drilling rig suitable for drilling the eye, after more than a year of production Practice shows that the effect is better.