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| STUDY OF DETERMINATION METHOD OF STABLE SLOPE SHAPE FOR OVAL DEEP FURROW OPEN PITS BASED ON AXIAL RATIO THEORY |
| REN Gaofeng，QIAN Zhaoming，YAN Zhenxiong，ZHANG Shixiong，ZHANG Haifeng |
| (School of Resources and Environment Engineering，Wuhan University of Technology，Wuhan，Hubei 430070，China) |
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Abstract Taking the oval rock circle on the slope of an oval furrow pit for example，combining the axial ratio theory，the circle stress of the stable slope is derived for the oval deep furrow open pit under the conditions that the rock mass is continuous，homogeneous and elastic，and the rock mass is forced by the combination of weight stress and horizontal geostress. According to the determination method for getting the best axial ratio of roadway，the slope safety factor is derived with Mohr-Coulomb criterion. Based on the critical gliding conditions of micro-body in the slope，the critical stable slope angle is calculated. Therefore，the slope shape is determined. Compared with the slope shape determined by the traditional theory，this new shape can make a great reduction on the amount of peeling rock under the precise of guaranteeing the slope stability.
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Received: 31 October 2011
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2012, Vol. 31 
