主要介绍陕西秦岭终南山特长公路隧道施工中，为改善爆破效果，加快隧道掘进速度，在中、硬岩爆破实践中，在传统的楔形掏槽技术的基础上，成功地采用大面积深孔楔形掏槽技术，达到了很好的效果。

In order to improve the blasting effect and driving speed during the construction of Zhongnanshan superlong highway tunnel through Qinling mountain in Shanxi, China, largearea deephole wedge cutting blasting technology is used on basis of the traditional wedge cutting blasting technology and satisfactory results are achieved. The article presents the largearea deephole wedge cutting blasting technology applied in the construction of the highway tunnel.