heading advance meaning in English

导洞掘进
工祖推进

Study on improving efficiency of heading advance in kafang mine
提高卡房采选厂巷道掘进效率研究
The application of millisecond blasting technique in heading advance
微差爆破技术在巷道掘进中的应用
Again i looked at the face ; which was no longer turned from me - on the contrary , the bonnet was doffed , the bandage displaced , the head advanced
我再次打量了那张脸，这回可没有避开我相反，帽子脱了，绷带也扯了，脑袋伸向了我。