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| Comparative analysis of fully mechanized mining and fully mechanized caving strata behaviors |
| Wang Hua |
| Wajinwan Hulonggou Coal Mine Corporation Ltd., Datong Group, Datong 037042, China |
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Abstract Numerical simulation of coal mine was used to analyze different characteristics of strata behavior between fully mechanized mining and full-mechanized caving. The result showed that comparing with high cut in fully mechanized coal mining, the lower cutting height fully mechanized mining could effectively reduce the rib spalling due to the change of coal cutting height. In roof control effect, the fully mechanized mining was better than the large mining height fully mechanized mining and roof subsidence occupied 60% of the fully mechanized mining. Compared with full-mechanized caving and fully mechanized mining, abutment pressure distribution in front of coal wall was stress distribution of unimodal ahead of the coal wall with basic similar shape. The vertical stress concentration coefficient of fully mechanized mining was slightly larger than that of the fully mechanized caving and influence range of stress was similar.
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