深孔爆破成井在召口分矿的应用

Application of Shaft Formation by Longhole Blasting in Zhaokou Branch Mine

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。在施工中应避免层理裂隙,保证掏槽孔质量及延时分段爆破。

In order to complete the project safely and efficiently, in the construction of filling shaft in Zhaokou branch mine, down-the-hole drill was used to make deep holes. Using spiral cutting and millisecond subsection blasting, the filling shafts were formed by one blasting. The method has many advantages such as good safe conditions, fast construction progress, low labor intensity and fine working environment. At the same time, the bedding fracture should be avoided; the quality of cutting hole should be assured and should use delay sectional blasting.