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| Establishment and application of microseismic monitoring system for water damage in Pingyu No.1 Mine |
| Yang Guangyue1， Gao Gang2 |
| 1. Henan Pingyu Coal Power Co., Ltd., Xuchang 461670, China; 2. Hebei Coal Research Institute Co.,Ltd.,Xingtai 054000,China |
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Abstract The mining of No.II1 coal seam in Pingyu No.1 Coal Mine was threatened by the water damage of floor limestone. The microseismic monitoring system of water damage was constructed by using the large-scale real-time continuous characteristics of microseismic monitoring. The correction shot was used to invert the source parameters to determine that the positioning error of the system met the requirements. The spatial distribution characteristics of microseismic events and the damage range of floor during mining were determined, and the correlation between mining speed and microseismic activity was studied. The results showed that the failure depth of the floor of the working face during the monitoring period was 14 ~ 16 m. Under the condition of stratified mining, the reasonable range of the daily advancing distance of No.II1-15010 Face was 1.5 ~ 1.8 m. During the monitoring period, there was no Cambrian limestone microseismic event, indicating that there was no deep water channel formation, which provided a basis for safe mining.
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