岩塞爆破技术在喀斯特地区的应用——印江岩口特大型山体滑坡应急整治工程水下岩塞爆破

Application of Rock Frontier Blasting in Kaisite District

贵州省印江岩口特大型山体滑坡应急整治工程岩塞爆破 ,是我国第一次在喀斯特发育地区成功实施的大断面、深水下的岩塞爆破。洞室无衬砌、泄水无闸门、岩碴处理无集碴坑储碴 ,这种“三无”条件下的岩塞爆破新技术在我国首次采用。本次岩塞爆破 ,对底部开口直径为 6m的岩塞采用全排孔爆破成型 ,已超过国内外直径为 5m的经验上限值 ;成功地解决了在碎石层及砂卵石层覆盖下的岩塞爆破技术 ;乳化炸药作为岩塞爆破用药在我国是首次采用 ;采用先进的机具组织施工 (如 :多臂凿岩台车造孔等 ) ,其精度高、速度快。爆破后 ,进水口成型好、洞脸稳定 ,洞室磨蚀轻微 ,预裂面半孔率达 99 5 %。

The full row-hole blasting moulding of which diameter is 6m was utilized for rock frontier blasting, the technique successfully solve the problems of blasting under the coating of debris and sand layers. Emulsion explosives were firstly applied to rock frontier, advanced machines and tools were used in the implementation, which present high precise and rapid speed. After being blasted, the inlet is well moulede, the face of cave is stable, the abrasion of chamber is little, and the half-hole ratio of prespl...