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| ANALYSIS BRIEFLY ABOUT THE LAW OF ROCK DEFORMATION
CAUSED BY UNDERGROUND MINING OF METAL MINES |
| FU Hua，CHEN Congxin，XIA Kaizong，DENG Yangyang |
| (Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China) |
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Abstract Underground metal mining often lead to discontinuous deform of the surrounding rock. Monitoring，whose result can provide a basis for evaluating the safety of surface structures，is the most direct and effective way to get rock deformation. Taking Eastern area of Jin Shandian Iron as an example，according to monitoring data nearly six years，the law of rock deformation surrounding iron can be got，so do the law of deformation degree and trend. It shows that rock above the mined-out area falling collapsed under the influence of underground mining at Eastern area of Jin Shandian Iron. And the rock around collapse pit cracked and slipped under the influence of unloading and mining while farther rock deformed continuously. Depending on the deformation characteristics，the rock can be divided into five zones，as：vertical caving zone， stretch-slip zone，deform-move zone，micro-deform zone and undisturbed zone. The first two zones are continuous deformed zones while the last two are discontinuous among them，and the rest is a transition zone. The deform-move zone will gradually turn into the stretch-slip zone under mining，which result in expanding of deformation degree and scope.
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2015, Vol. 34 
