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| ASSESSMENT ON ROCKMASS QUALITY AT CHENCHAO IRON MINE AND SELECTION OF REINFORCING METHODS |
| Wu Youlun1， Xu Mengguo2， Wang Yuanhan1 |
| (1Huangzhong University of Science and Technology， Wuhan 430074 China) (2Wuhan University of Science and Technology， Wuhan 430081 China) |
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Abstract According to the criteria for classification of engineering rockmass and the actual stability state of mining preparation tunnels，the engineering quality of rock mass at –302 m sublevel of Chenchao Iron Mine is determined and evaluated by qualitative and quantitative methods. The engineering quality of rockmass at low sublevels is predicted furthermore. According to the different evaluation results，different reinforcing methods are selected. The evaluated and predicted results coincide well with practical cases，and the reinforcing methods are effective.
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1 林韵梅. 岩石分级的理论与实践[M]. 北京：冶金工业出版社，1996
2 许梦国，叶义成，盛建龙等.锚杆联系链在复杂地质条件下巷道支护中的应用[J]. 黄金，2000，21(9)：11～14
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2002, Vol. 21 
