1·At present, in the building of new shaft, rock drivage takes 40%-50% of whole project, and the construction takes 35%-50%.
目前，在新井建设中，岩巷掘进工程量一般约占总工程量的40% ~ 50%，施工工期占35% ~ 50%。
2·The test results show that the better blasting effect and obvious technical and economic benefits in coal rock drivage can be acquired by means of the quasi-parallel cutting method.
实践表明，在煤矿岩巷掘进中使用准直眼掏槽方式，能够取得良好的爆破效果和显著的技术经济效益。
3·Finally, the examples of projects pointed out lessons learnt from roadway drivage in soft rock.
最后，通过工程实例说明在软岩巷道施工中所吸取的教训。
4·Developing rock roadway of coal mine is a hard task at present. Mechanized drivage of rock roadway has become a common technical problem of every coal mine.
目前煤矿岩巷开拓任务重，岩巷机械化掘进成为各矿普遍存在的技术难题。