Research on Effect of Rockmass Joints and Fissures on Blasting in Tunneling and Its Practice

Abstract

Abstract: In view of low blasting efficiency and poor quality in tunneling of Longtoushan Gold Mine, the effect of rockmass joints and fissures on tunneling blasting is analyzed. The on-site test results show that some effective measures such as reasonable cutting pattern, blasting parameter improvement, ensured blast-hole quality, etc. can hraise the blasting efficiency and advance per attack, improve the blasting quality and achieve good economic benefit in tunneling in jointed and fissured rockmass.

Key words: Jointed and fissured rockmass, Tunneling, Cutting pattern, Blasting parameters, Blasting efficiency

TAN Hai-Wen, WU Zhong-Xiong, MA Rui-Jun. Research on Effect of Rockmass Joints and Fissures on Blasting in Tunneling and Its Practice[J]. Metal Mine, 2007, 37(09): 42-45.

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Research on Effect of Rockmass Joints and Fissures on Blasting in Tunneling and Its Practice

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