Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory
With the increase in depth of coal mining, the hydrogeological complexity largely increases and water inrush accidents happen more frequently. For the safety of coal mining, horizontal directional drilling and grouting techniques have been implemented to detect and plug the fractures and conduits th...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Complexity |
| Online Access: | http://dx.doi.org/10.1155/2020/8205370 |
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| author | Yaru Guo Shuning Dong Yonghong Hao Zaibin Liu Tian-Chyi Jim Yeh Wenke Wang Yaoquan Gao Pei Li Ming Zhang |
| author_facet | Yaru Guo Shuning Dong Yonghong Hao Zaibin Liu Tian-Chyi Jim Yeh Wenke Wang Yaoquan Gao Pei Li Ming Zhang |
| author_sort | Yaru Guo |
| collection | DOAJ |
| description | With the increase in depth of coal mining, the hydrogeological complexity largely increases and water inrush accidents happen more frequently. For the safety of coal mining, horizontal directional drilling and grouting techniques have been implemented to detect and plug the fractures and conduits that deliver high-pressure groundwater to coal mine. Taking the grouting engineering performed at Xingdong coal mine at 980 m below sea level as an example, we collected the data of grouting quantity, the loss of drilling fluid, gamma value, water temperature, average water absorption, distance between grouting loss points, water pressure on coal seam floor, and aquifuge thickness at 90 boreholes in the mine to conduct grey relational analysis, first. The analysis showed that the grouting quantity was highly correlated with all other factors. Subsequently, grey system evaluation was used to evaluate the risk of water inrush from the coal seam floor. The results of risk analysis illustrated that three water inrushes from Ordovician limestone occurred in mining face 2127, 2125, and 2222 in the study area were all located in the area with a risk score higher than 65. Through grouting, the identified cracks were effectively blocked and waterproof layers beneath the coal seam floors were constructed to reduce the threat of water inrush. By comparing the risk assessment results with three water inrush cases before grouting operation, we found that water inrush areas were consistent with the area of higher risk. |
| format | Article |
| id | doaj-art-0405288d1e8b437f86b1bcac525d4989 |
| institution | Kabale University |
| issn | 1076-2787 1099-0526 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Complexity |
| spelling | doaj-art-0405288d1e8b437f86b1bcac525d49892025-02-03T01:04:14ZengWileyComplexity1076-27871099-05262020-01-01202010.1155/2020/82053708205370Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System TheoryYaru Guo0Shuning Dong1Yonghong Hao2Zaibin Liu3Tian-Chyi Jim Yeh4Wenke Wang5Yaoquan Gao6Pei Li7Ming Zhang8School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, ChinaXi’an Research Institute of China Coal Technology and Engineering Group, Xi’an, Shaanxi 710054, ChinaTianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, ChinaXi’an Research Institute of China Coal Technology and Engineering Group, Xi’an, Shaanxi 710054, ChinaTianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, ChinaSchool of Water and Environment, Chang’an University, Xi’an, Shaanxi 710064, ChinaXi’an Research Institute of China Coal Technology and Engineering Group, Xi’an, Shaanxi 710054, ChinaXi’an Research Institute of China Coal Technology and Engineering Group, Xi’an, Shaanxi 710054, ChinaGeological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8567, JapanWith the increase in depth of coal mining, the hydrogeological complexity largely increases and water inrush accidents happen more frequently. For the safety of coal mining, horizontal directional drilling and grouting techniques have been implemented to detect and plug the fractures and conduits that deliver high-pressure groundwater to coal mine. Taking the grouting engineering performed at Xingdong coal mine at 980 m below sea level as an example, we collected the data of grouting quantity, the loss of drilling fluid, gamma value, water temperature, average water absorption, distance between grouting loss points, water pressure on coal seam floor, and aquifuge thickness at 90 boreholes in the mine to conduct grey relational analysis, first. The analysis showed that the grouting quantity was highly correlated with all other factors. Subsequently, grey system evaluation was used to evaluate the risk of water inrush from the coal seam floor. The results of risk analysis illustrated that three water inrushes from Ordovician limestone occurred in mining face 2127, 2125, and 2222 in the study area were all located in the area with a risk score higher than 65. Through grouting, the identified cracks were effectively blocked and waterproof layers beneath the coal seam floors were constructed to reduce the threat of water inrush. By comparing the risk assessment results with three water inrush cases before grouting operation, we found that water inrush areas were consistent with the area of higher risk.http://dx.doi.org/10.1155/2020/8205370 |
| spellingShingle | Yaru Guo Shuning Dong Yonghong Hao Zaibin Liu Tian-Chyi Jim Yeh Wenke Wang Yaoquan Gao Pei Li Ming Zhang Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory Complexity |
| title | Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory |
| title_full | Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory |
| title_fullStr | Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory |
| title_full_unstemmed | Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory |
| title_short | Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory |
| title_sort | risk assessments of water inrush from coal seam floor during deep mining using a data fusion approach based on grey system theory |
| url | http://dx.doi.org/10.1155/2020/8205370 |
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