Li S.-Y.,China University of Mining and Technology |
Li S.-Y.,Geological Institute Yima Coal Industry Group Co. |
Ma Z.-Q.,China University of Mining and Technology |
Ren M.-L.,China University of Mining and Technology |
Zhang X.-L.,Yuejing Coal Mine Yima Coal Industry Group Co.
Progress in Mine Safety Science and Engineering II - Proceedings of the 2nd International Symposium of Mine Safety Science and Engineering | Year: 2014
In order to get the regulation of water hazards and to supply for the future water prevention work in Yima Coalfield, the historic data, geological structure, the distribution of small coal mines, the river region, the main aquifer and aquifuge, mining thickness and the fissures have been analyzed systematically. With small coal mines closure, treatment of fissures and channels, and the deeper mining activities, the main water hazards have changed from precipitation, surface water and kiln water into roof flood. The threat of the roof water mainly happened on the core of syncline with 700 m deep and also happened on the edge of fault and the rich abundance region. Roof water inrush has close relationship with mining thickness and periodic mine pressure. For roof water hazard, "three maps-two predictions" was proposed and applied in evaluation and prediction of water inrush source, channel and intensity. With geophysical prospecting, the suspected water rich area has been obtained and then the drainage work could be done before mining. Besides, other water prevention work which can improve the drainage capacity of the working face also should be carried out. © 2014 Taylor & Francis Group. Source