Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine
AbstractIn recent years, the rockburst induced by steeply inclined coal seam mining in the Urumqi mining area has become serious. In this paper, the evolution law of multiplex microseismic information before and after the rockburst is obtained through in-depth mining of the field mic...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
GeoScienceWorld
2022-07-01
|
| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2011/7349759/615354/Precursor-Information-Recognition-of-Rockburst-in |
| _version_ | 1811177459186401280 |
|---|---|
| author | Huicong Xu Xingping Lai Shuai Zhang Pengfei Shan Zheng Wu Haidong Xu Rui Bai Qifeng Guo |
| author_facet | Huicong Xu Xingping Lai Shuai Zhang Pengfei Shan Zheng Wu Haidong Xu Rui Bai Qifeng Guo |
| author_sort | Huicong Xu |
| collection | DOAJ |
| description |
AbstractIn recent years, the rockburst induced by steeply inclined coal seam mining in the Urumqi mining area has become serious. In this paper, the evolution law of multiplex microseismic information before and after the rockburst is obtained through in-depth mining of the field microseismic data. In addition, the evolution characteristics of microseismic activities before and after the rockburst of steeply inclined coal-rock mass in the meizoseismal area are revealed from three important scales: time, space, and strength. The results show the following: (1) The microseismic activity of the Wudong Coal Mine is mainly of stress migration type. The sandwiched rock pillar is the primary inducement of rockburst, and the b value decreases greatly with the mining progresses (by 23.9%). It indicates that the risk of rockburst induced by the local failure of rock mass in this area is increasing. (2) From the time scale and strength index, the precursory indexes of rockburst are put forward, respectively: ① the daily total energy and the frequency of microseisms suddenly rise and fall rapidly at the same time in the shock start-up period (5 days before rockburst), and the daily total energy of microseisms decreases to the abnormal valley value within 30 days. ② The abnormal growth rate of microseismic events exceeded 60% in a certain stage, and “induced shock events” appeared. (3) The shock risk is positively correlated with the decline rate of energy index, the growth rate of cumulative apparent volume, and Schmidt. It is determined that the rockburst will occur within 19 days after entering the shock early warning period. The results of prediction examples show that this method has a good prediction effect on rockburst in strong meizoseismal areas, which can provide a reference for rockburst prevention in the mining process in strong meizoseismal areas. |
| first_indexed | 2024-04-11T06:02:16Z |
| format | Article |
| id | doaj.art-aaddbaa9c1f040bf82164a6165c69437 |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-04-11T06:02:16Z |
| publishDate | 2022-07-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-aaddbaa9c1f040bf82164a6165c694372022-12-22T04:41:38ZengGeoScienceWorldLithosphere1941-82641947-42532022-07-012022Special 1110.2113/2022/7349759Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal MineHuicong Xu0http://orcid.org/0000-0002-6748-114XXingping Lai1Shuai Zhang2http://orcid.org/0000-0001-9601-6717Pengfei Shan3Zheng Wu4Haidong Xu5Rui Bai6Qifeng Guo71 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn1 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn1 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn1 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn1 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn1 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn1 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn1 School of Energy Resources Xi’an University of Science and Technology Xi’an 710054 China xust.edu.cn AbstractIn recent years, the rockburst induced by steeply inclined coal seam mining in the Urumqi mining area has become serious. In this paper, the evolution law of multiplex microseismic information before and after the rockburst is obtained through in-depth mining of the field microseismic data. In addition, the evolution characteristics of microseismic activities before and after the rockburst of steeply inclined coal-rock mass in the meizoseismal area are revealed from three important scales: time, space, and strength. The results show the following: (1) The microseismic activity of the Wudong Coal Mine is mainly of stress migration type. The sandwiched rock pillar is the primary inducement of rockburst, and the b value decreases greatly with the mining progresses (by 23.9%). It indicates that the risk of rockburst induced by the local failure of rock mass in this area is increasing. (2) From the time scale and strength index, the precursory indexes of rockburst are put forward, respectively: ① the daily total energy and the frequency of microseisms suddenly rise and fall rapidly at the same time in the shock start-up period (5 days before rockburst), and the daily total energy of microseisms decreases to the abnormal valley value within 30 days. ② The abnormal growth rate of microseismic events exceeded 60% in a certain stage, and “induced shock events” appeared. (3) The shock risk is positively correlated with the decline rate of energy index, the growth rate of cumulative apparent volume, and Schmidt. It is determined that the rockburst will occur within 19 days after entering the shock early warning period. The results of prediction examples show that this method has a good prediction effect on rockburst in strong meizoseismal areas, which can provide a reference for rockburst prevention in the mining process in strong meizoseismal areas.https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2011/7349759/615354/Precursor-Information-Recognition-of-Rockburst-in |
| spellingShingle | Huicong Xu Xingping Lai Shuai Zhang Pengfei Shan Zheng Wu Haidong Xu Rui Bai Qifeng Guo Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine Lithosphere |
| title | Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine |
| title_full | Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine |
| title_fullStr | Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine |
| title_full_unstemmed | Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine |
| title_short | Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine |
| title_sort | precursor information recognition of rockburst in the coal rock mass of meizoseismal area based on multiplex microseismic information fusion and its application a case study of wudong coal mine |
| url | https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2011/7349759/615354/Precursor-Information-Recognition-of-Rockburst-in |
| work_keys_str_mv | AT huicongxu precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine AT xingpinglai precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine AT shuaizhang precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine AT pengfeishan precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine AT zhengwu precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine AT haidongxu precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine AT ruibai precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine AT qifengguo precursorinformationrecognitionofrockburstinthecoalrockmassofmeizoseismalareabasedonmultiplexmicroseismicinformationfusionanditsapplicationacasestudyofwudongcoalmine |