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| Extremely Thick Coal Seam Layered Caving First Top Coal Caving Stratified Analysis |
| KANG Yan-lei，HU Yun-fei |
| No. 2 Zhundong Mine, Shenhua Guoneng Energy Group Corporation Ltd., Changji 652300, China |
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Abstract In order to study the problem of east junggar coalfield extremely thick coal seam layered caving first top coal caving stratified, using similar simulation, numerical simulation and theoretical analysis on the B1 coal caving first stratified analysis, considering that B1 seam top coal caving first stratification was better. Advancing 36 ~ 40 m from cut, basic top coal can be caving with mining.
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