Blasting Technology for Mine Shaft Sinking in Ultra Broken Rock Strata
YANG Xiao-cheng
SHANG Li-bin
WANG Yu-lu
ZHANG Shi-lin
LYU Xue-an
Abstract：A mine auxiliary shaft in Jingfu Mine had passed through several ultra broken rock strata. A stability of the rock was quite poor ,would cause the sidewall spalling and the roof falling and would cause dangers to the personnel safety and equipment. With a pre-cracking blasting ,buffering borehole , circulating rate reduced ,seismic energy value reduced ,low density and low detonation velocity explo‐sives selected ,rational explosive charge structure and other blasting vibration prevention technology measures applied ,a good blasting effect was obtained ,the surrounding failure by the blasting was re‐duced ,the surrounding rock stability was maintained and a safety and rapid construction in the ultra broken rock section was realized.
Keywords：mine shaftultra broken rock stratapre-cracking blastingbuffering boreholequasi-parallel cut
Publication Date：2014-09-18
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 19-22 )