Assessment of rock mass characteristics and the excavation disturbed zone in the Lingxin Coal Mine beneath the Xitian river, China |
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| Authors: | Xingping Lai Meifeng Cai Fenhua Ren Mowen Xie Tetsuro Esaki |
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| Affiliation: | aSchool of Civil & Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, P R China;bSchool of Energy, Xi’an University of Science & Technology, Xi’an 710054, P R China;cMinistry of Education of the West Mining and Hazard Control Key Laboratory of China, Xian 710054, P R China;dInstitute of Environment Systems, Faculty of Engineering, Kyushu University, Japan |
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| Abstract: | Safe production and induced hazard prevention in coal mines mainly concern problems in the excavation disturbed zone (EDZ), but coal mining can also make a significant impact on the environment. Comprehensive techniques using a borehole TV viewer system, electrical logging, and monitoring of drilling fluid leakage offer the ability to identify changing geological conditions and the location of any nearby abandoned mining workings. The inner collapsed zone and the expanding height of the crack zone transmitting water plus their spatial distribution after excavating the superincumbent coal seam stratum are determined at no. L3414 workings, Lingxin Coal Mine beneath the Xitian river, China. An integrated system of GIS-based on a stochastic model, which has been developed for the prediction of dynamic subsidence coupling the time function and probabilistic integral method, is verified through practice at the Lingxin Coal Mine. This development has greatly expanded the ability of the mine operator to characterize previously inaccessible areas of the mine, providing a reliable basis for safe mining and prevention of induced-hazards to ensure high production mining underneath the river bed. |
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| Keywords: | Safe coal mining Excavation disturbed zone (EDZ) Mining underneath Xitian river L3414 workings GIS |
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