Microseismic activity law and control methods in mega-fault structure area under the influence of extensive mining
To provide a reference for rock burst prevention and control in mega-fault structure area under the influence of extensive mining, the Balipu Fault (i.e. the drop reaches up to 100 meters) in Jining No. 2 Coal Mine has been selected as the engineering background for the study. The microseismic behav...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Coal Science and Technology
2024-11-01
|
| Series: | Meitan kexue jishu |
| Subjects: | |
| Online Access: | http://www.mtkxjs.com.cn/article/doi/10.12438/cst.2023-1477 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850248000571441152 |
|---|---|
| author | Weiyao GUO Yueying ZHANG Xuebin GU Xufei GONG Chuanqing GUO Wenjing GUO Qian ZHANG Lei ZHANG |
| author_facet | Weiyao GUO Yueying ZHANG Xuebin GU Xufei GONG Chuanqing GUO Wenjing GUO Qian ZHANG Lei ZHANG |
| author_sort | Weiyao GUO |
| collection | DOAJ |
| description | To provide a reference for rock burst prevention and control in mega-fault structure area under the influence of extensive mining, the Balipu Fault (i.e. the drop reaches up to 100 meters) in Jining No. 2 Coal Mine has been selected as the engineering background for the study. The microseismic behavior of the entire mine as well as the footwall and hanging wall of the Balipu Fault was studied, and the fault activity was analyzed based on the accumulated microseismic energy. Additionally, the control methods of microseismic activities in mega-fault structure area were explored, and then the engineering application was carried out. Results show that: Under the influence of extensive mining, low-energy-level microseismic events were uniformly distributed in the mining face and roadway areas in the Jining No. 2 Coal Mine, which principally come from regular roof strata movement. There were no concentrated, continuous, and widely distributed microseismic events observed along the Balipu Fault plane. The microseismic events increased with the decrease of distance between the mining face and fault plane. It means that the mining can disturb the fault plane, but the current mining intensity was not enough to induce the fault activation. The highest cumulative energy of microseismic in the fault structure area exhibited an overall stable trend, but the concentrating position continuously varied as changing the mining conditions, particularly influenced by the mining speed and intensity. The effective solution is to leave a wide protective coal pillar for mitigating microseismic activity and achieving safe mining in mega-fault structure area, accompanied with reasonable roof pre-fracturing and coal pressure relief. Engineering practice was carried out in the 103lower03 mining face of the Balipu Fault area based on the rock burst control strategy of different fault types. It was observed that the intensity of microseismic activity was noticeably weakened during the mining process. The total microseismic energy of one day decreased, while the microseismic frequency increased, indicating that a high frequency-low intensity of energy release. |
| format | Article |
| id | doaj-art-bdaae24b5a544b2f97ee02d2f0b14d67 |
| institution | OA Journals |
| issn | 0253-2336 |
| language | zho |
| publishDate | 2024-11-01 |
| publisher | Editorial Department of Coal Science and Technology |
| record_format | Article |
| series | Meitan kexue jishu |
| spelling | doaj-art-bdaae24b5a544b2f97ee02d2f0b14d672025-08-20T01:58:48ZzhoEditorial Department of Coal Science and TechnologyMeitan kexue jishu0253-23362024-11-01521126027210.12438/cst.2023-14772023-1477Microseismic activity law and control methods in mega-fault structure area under the influence of extensive miningWeiyao GUO0Yueying ZHANG1Xuebin GU2Xufei GONG3Chuanqing GUO4Wenjing GUO5Qian ZHANG6Lei ZHANG7College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaJining No. 2 Coal Mine, YanKuang Energy Group company limited, JiNing 370800, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaGraduate School of Engineering, Nagasaki University, Nagasaki 852-8521, JapanCollege of Coal Engineering, Shanxi Datong University, Datong 037003, ChinaTo provide a reference for rock burst prevention and control in mega-fault structure area under the influence of extensive mining, the Balipu Fault (i.e. the drop reaches up to 100 meters) in Jining No. 2 Coal Mine has been selected as the engineering background for the study. The microseismic behavior of the entire mine as well as the footwall and hanging wall of the Balipu Fault was studied, and the fault activity was analyzed based on the accumulated microseismic energy. Additionally, the control methods of microseismic activities in mega-fault structure area were explored, and then the engineering application was carried out. Results show that: Under the influence of extensive mining, low-energy-level microseismic events were uniformly distributed in the mining face and roadway areas in the Jining No. 2 Coal Mine, which principally come from regular roof strata movement. There were no concentrated, continuous, and widely distributed microseismic events observed along the Balipu Fault plane. The microseismic events increased with the decrease of distance between the mining face and fault plane. It means that the mining can disturb the fault plane, but the current mining intensity was not enough to induce the fault activation. The highest cumulative energy of microseismic in the fault structure area exhibited an overall stable trend, but the concentrating position continuously varied as changing the mining conditions, particularly influenced by the mining speed and intensity. The effective solution is to leave a wide protective coal pillar for mitigating microseismic activity and achieving safe mining in mega-fault structure area, accompanied with reasonable roof pre-fracturing and coal pressure relief. Engineering practice was carried out in the 103lower03 mining face of the Balipu Fault area based on the rock burst control strategy of different fault types. It was observed that the intensity of microseismic activity was noticeably weakened during the mining process. The total microseismic energy of one day decreased, while the microseismic frequency increased, indicating that a high frequency-low intensity of energy release.http://www.mtkxjs.com.cn/article/doi/10.12438/cst.2023-1477extensive miningmega-faultmicroseismicrock burstprevention and control |
| spellingShingle | Weiyao GUO Yueying ZHANG Xuebin GU Xufei GONG Chuanqing GUO Wenjing GUO Qian ZHANG Lei ZHANG Microseismic activity law and control methods in mega-fault structure area under the influence of extensive mining Meitan kexue jishu extensive mining mega-fault microseismic rock burst prevention and control |
| title | Microseismic activity law and control methods in mega-fault structure area under the influence of extensive mining |
| title_full | Microseismic activity law and control methods in mega-fault structure area under the influence of extensive mining |
| title_fullStr | Microseismic activity law and control methods in mega-fault structure area under the influence of extensive mining |
| title_full_unstemmed | Microseismic activity law and control methods in mega-fault structure area under the influence of extensive mining |
| title_short | Microseismic activity law and control methods in mega-fault structure area under the influence of extensive mining |
| title_sort | microseismic activity law and control methods in mega fault structure area under the influence of extensive mining |
| topic | extensive mining mega-fault microseismic rock burst prevention and control |
| url | http://www.mtkxjs.com.cn/article/doi/10.12438/cst.2023-1477 |
| work_keys_str_mv | AT weiyaoguo microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining AT yueyingzhang microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining AT xuebingu microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining AT xufeigong microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining AT chuanqingguo microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining AT wenjingguo microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining AT qianzhang microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining AT leizhang microseismicactivitylawandcontrolmethodsinmegafaultstructureareaundertheinfluenceofextensivemining |