Blast vibration damage to underground coal mines from adjacent open-pit blasting

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• 作者：Singh ; P.K.
• 刊名：International Journal of Rock Mechanics and Mining Sciences
• 出版年：2002
• 出版时间：December, 2002
• 年：2002
• 卷：39
• 期：8
• 页码：959-973
• 全文大小：1.01 M

文摘

A study was conducted to evaluate the effect of heavy blasting in open-pit coal mines on the stability of adjoining underground coal mine workings. Investigations were carried out at seven coal mines in India. Strata monitoring instruments, viz. borehole extensometers, convergence indicators, strain bars, stress capsules and load cells were installed in the roof and pillar. Monitoring of strata behaviour was carried out before and after the blasts. Arrangements were made to mount the transducers of seismographs in the roof and pillars to monitor vibration. Altogether, 202 production blasts were conducted and 622 vibration data were recorded.