Using spiral cutting and millisecond subsection blasting,the filling shafts were formed by one blasting.
为安全、高效完成充填井施工工程,采用潜孔钻机施工深孔,以螺旋掏槽和微差分段爆破,一次爆破形成充填井,安全条件好,施工进度快,劳动强度低,作业环境好。
Based on the blasting mechanism of spiral cutting with big empty hole,a mechanic model of blasting in the first blast charges hole is established and the selection of blasting parameters is discussed.
分析了大空孔螺旋掏槽爆破机理,并建立了首爆装药孔爆破力学模型,对其爆破参数的确定进行了探讨,将研究结果应用于广西华锡集团爆破掘进中,效果良好。
However, the progressive spiral cutting has merits of few drilling, smaller charging and better blasting effectiveness.
渐进式螺旋掏槽具有钻孔少、装药少、爆破效果好的优点,在分析渐进式螺旋掏槽原理基础上介绍了其在水布垭地下厂房中的应用实践。
