Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water
The existence of large-scale weak zone will have a great adverse impact on coal mining in high confined aquifer. Taking the Wutongzhuang Coal Mine which is threatened by high-pressure water as an example, this paper studies the difference between the microseismic events before and after mining and a...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6915221 |
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| author | Jing Jia Xianjie Hao Guanghui Zhao Yubao Li Xiaoyu Chuai Lei Huang Guangyao Pan Yingnan Wei Kai Chen Ruilai Huang Rongcheng Zhan |
| author_facet | Jing Jia Xianjie Hao Guanghui Zhao Yubao Li Xiaoyu Chuai Lei Huang Guangyao Pan Yingnan Wei Kai Chen Ruilai Huang Rongcheng Zhan |
| author_sort | Jing Jia |
| collection | DOAJ |
| description | The existence of large-scale weak zone will have a great adverse impact on coal mining in high confined aquifer. Taking the Wutongzhuang Coal Mine which is threatened by high-pressure water as an example, this paper studies the difference between the microseismic events before and after mining and analyzes the influence of the large size weak zone on the coal mining on the confined aquifer. The research results show that the microseismic characteristics of the large soft weak belt are small number of events, the spatial distribution of events is concentrated, and the energy level is large. The amplitude of microseismic events is higher, and the proportion of large events in microseismic events is larger than that of small events; the characteristics of microseismic events caused by mining face mining are that the number of events is more, the distribution of events is loose, the distribution of roof and floor is more, the energy level is less, the amplitude is smaller, and the proportion of small and medium events in microseismic events is larger than that of large events. Due to the joint influence of large-scale weak zone of floor and mining, the floor in the middle area of working face is affected by mining, the number of microseismic events in each aquifer increases suddenly, the karst fissures between the aquifers are further developed, and there is a trend of transfixion. Therefore, measures such as floor grouting should be taken to reinforce the large-scale weak zone before mining. |
| format | Article |
| id | doaj-art-16ec220c07d44746b7d48cf6b35a0acd |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-16ec220c07d44746b7d48cf6b35a0acd2025-08-20T02:02:33ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/69152216915221Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined WaterJing Jia0Xianjie Hao1Guanghui Zhao2Yubao Li3Xiaoyu Chuai4Lei Huang5Guangyao Pan6Yingnan Wei7Kai Chen8Ruilai Huang9Rongcheng Zhan10Hebei Coal Research Institute, Xingtai, Hebei 054099, ChinaBeijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaHebei Coal Research Institute, Xingtai, Hebei 054099, ChinaHebei Coal Research Institute, Xingtai, Hebei 054099, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaThe existence of large-scale weak zone will have a great adverse impact on coal mining in high confined aquifer. Taking the Wutongzhuang Coal Mine which is threatened by high-pressure water as an example, this paper studies the difference between the microseismic events before and after mining and analyzes the influence of the large size weak zone on the coal mining on the confined aquifer. The research results show that the microseismic characteristics of the large soft weak belt are small number of events, the spatial distribution of events is concentrated, and the energy level is large. The amplitude of microseismic events is higher, and the proportion of large events in microseismic events is larger than that of small events; the characteristics of microseismic events caused by mining face mining are that the number of events is more, the distribution of events is loose, the distribution of roof and floor is more, the energy level is less, the amplitude is smaller, and the proportion of small and medium events in microseismic events is larger than that of large events. Due to the joint influence of large-scale weak zone of floor and mining, the floor in the middle area of working face is affected by mining, the number of microseismic events in each aquifer increases suddenly, the karst fissures between the aquifers are further developed, and there is a trend of transfixion. Therefore, measures such as floor grouting should be taken to reinforce the large-scale weak zone before mining.http://dx.doi.org/10.1155/2021/6915221 |
| spellingShingle | Jing Jia Xianjie Hao Guanghui Zhao Yubao Li Xiaoyu Chuai Lei Huang Guangyao Pan Yingnan Wei Kai Chen Ruilai Huang Rongcheng Zhan Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water Advances in Civil Engineering |
| title | Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water |
| title_full | Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water |
| title_fullStr | Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water |
| title_full_unstemmed | Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water |
| title_short | Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water |
| title_sort | evolution analysis of microseismic events before and after mining through large scale weak zone with high confined water |
| url | http://dx.doi.org/10.1155/2021/6915221 |
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