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光面爆破与锚喷支护是当前国内外地下工程开挖与支护的较为先进的技术。近年来,这项技术已在我国冶金、煤炭、铁道、建工、水电和国防等部门推广应用,并获得了重大发展。“光面爆破”就是在设计轮廓线上布置较密的炮眼,控制周边炮眼爆破的一种方法。它与普通爆破法相比,可获得符合设计边界线的平整的周边轮廓面,避免过(欠)挖,减轻对围岩整体性的破坏,从而提高了开挖质量,增进施工安全。“锚喷支护”就是根据岩石情况,在岩石巷道表面喷上一层水泥沙浆或混凝土;或者把锚打入岩石内部,表面上再喷浆,用以
Smooth blasting and anchor spray support are the most advanced technologies for excavation and support of underground engineering at home and abroad. In recent years, this technology has been promoted and applied in China’s metallurgy, coal, railway, construction, hydropower and national defense departments, and has achieved significant development. “Smooth blasting” is a method of controlling the blasting of the surrounding blasthole by arranging a dense blasthole on the design contour. Compared with the normal blasting method, it can obtain a smooth peripheral outline conforming to the design boundary line, avoiding over (under) excavation and reducing the damage to the integrity of the surrounding rock, thereby improving the quality of excavation and enhancing construction safety. “Anchor and shotcrete support” is based on rock conditions, the rock tunnel surface sprayed with a layer of cement mortar or concrete; or anchor into the rock inside, the surface and then shotcrete, to