Mining disturbance effect and mining arrangements analysis of near-fault mining in high tectonic stress region

• Published in: Safety science Vol. 50; no. 4; pp. 649 - 654
• Main Authors: Ji, H.G., Ma, H.S., Wang, J.A., Zhang, Y.H., Cao, H.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier India Pvt Ltd 01.04.2012; Elsevier
• Subjects: Coulomb failure stress increment; Dynamic disaster risk; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Engineering geology; Exact sciences and technology; Mining arrangement; Mining disturbance effect; Near-fault mining; Far East; Asia; China; Mining disturbance effect; Coulomb failure stress increment; Dynamic disaster risk; Near-fault mining; Mining arrangement; stress; mines; symposia; safety; mining; tectonics
• ISSN: 0925-7535; 1879-1042
• DOI: 10.1016/j.ssci.2011.08.062

► A dynamic Coulomb failure stress increment model is established for assessment. ► The Coulomb failure stress increment can reflect the stress environment of fault. ► Disturbance effect in working face perpendicular to fault is less than parallel to it. Dynamic disasters can be easily induced by mining disturbance in the tectonic stress concentration region near the fault. Based on the fault Coulomb failure stress criterion, a dynamic Coulomb failure stress increment model is established for quantitative assessment of mining disturbance effect. Furthermore, the disturbance effects of two possible working face arrangements near the same fault are compared by using the proposed dynamic Coulomb failure stress model and numerical method. The results show that Coulomb failure stress increment, as a comprehensive mechanical parameter, can well reflect the mining disturbance to the stress environment of fault. The disturbance effect on the fault in the case of the working face perpendicular to fault is much less than that of the working face parallel to fault, therefore the dynamic disaster risk induced by the former arrangement is much lower.