Evaluation Analysis on Floor Water Inrush Vulnerability of Ordovician Limestone in Down Group Seams
Author(s): WANG Fei, Shanxi Poly Hesheng Coal Industry Company Limited
Pages: 97-100
Year: 2014 Issue: 4
Journal: Coal Science and Technology
Keyword: seam floor; water inrush coefficient method; vulnerability index method; GIS; AHP method;
Abstract: In order to solve the potential danger problem of the water inrush from the Ordovician limestone in the down group seam floor during the pressurized coal mining process in a mine of Poly Hesheng Coal Industry Company Limited,with the analysis on the geological condition and hydraulically condition of the seams in the mine,there were nine factors affected to the vulnerability evaluation of the water inrush from the Ordovician limestone in the down group seam floor determined and selected as the main control factors. GIS was applied to establish a subtopic figure layer after the classification treatment conducted on the data of the main control factors. Then the AHP method was applied to determine the weighting proportion of each main control factor and then a statistic analysis of the frequency histogram was conducted on the data. According to the relevant threshold value,the mine was divided into a water inrush safety area,quite safety area, transition area,quite vulnerable area and vulnerable area. The study results showed that in the scope of the mining area,the water inrush area from the Ordovician limestone in the combined seam floor of No. 10 seam and No. 11 seam would be a quite safety area from west to east,the transition area to the quite vulnerable area and the local structure area would be a water inrush vulnerable area.
Pages: 97-100
Year: 2014 Issue: 4
Journal: Coal Science and Technology
Keyword: seam floor; water inrush coefficient method; vulnerability index method; GIS; AHP method;
Abstract: In order to solve the potential danger problem of the water inrush from the Ordovician limestone in the down group seam floor during the pressurized coal mining process in a mine of Poly Hesheng Coal Industry Company Limited,with the analysis on the geological condition and hydraulically condition of the seams in the mine,there were nine factors affected to the vulnerability evaluation of the water inrush from the Ordovician limestone in the down group seam floor determined and selected as the main control factors. GIS was applied to establish a subtopic figure layer after the classification treatment conducted on the data of the main control factors. Then the AHP method was applied to determine the weighting proportion of each main control factor and then a statistic analysis of the frequency histogram was conducted on the data. According to the relevant threshold value,the mine was divided into a water inrush safety area,quite safety area, transition area,quite vulnerable area and vulnerable area. The study results showed that in the scope of the mining area,the water inrush area from the Ordovician limestone in the combined seam floor of No. 10 seam and No. 11 seam would be a quite safety area from west to east,the transition area to the quite vulnerable area and the local structure area would be a water inrush vulnerable area.
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