Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring
Abstract Coal and gas outburst is one of the geological disasters that seriously threaten the safety of coal mines production. In recent years, with the increase of mining depth, outbursts become frequent. To further explore the occurrence mechanism of deep coal and gas outburst, a self-developed tr...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-26288-7 |
| _version_ | 1811198361208881152 |
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| author | Xin Zhang Jupeng Tang Honghao Yu Yishan Pan |
| author_facet | Xin Zhang Jupeng Tang Honghao Yu Yishan Pan |
| author_sort | Xin Zhang |
| collection | DOAJ |
| description | Abstract Coal and gas outburst is one of the geological disasters that seriously threaten the safety of coal mines production. In recent years, with the increase of mining depth, outbursts become frequent. To further explore the occurrence mechanism of deep coal and gas outburst, a self-developed true triaxial coal and gas outburst simulation device was used to simulate the coal and gas outburst at different depths. The results show that with the increase of simulation depth, the critical gas pressure of outburst gradually decreases, and the unit outburst intensity increases sharply. The gas threshold of deep coal and gas outburst is lower. During the incubation and excitation, gas pressure has three special variation rules, namely self-increasing characteristic, stage and instantaneous. In the early incubation, acoustic emission (AE) energy is at a low level, low energy frequency is dominant; in the later incubation, AE energy increases greatly, high energy frequency is dominant. From the perspective of AE energy, a quantitative index that reflects the danger of coal and gas outburst in the incubation is defined, which provides a scientific reference for the prediction and prevention of disasters of coal and gas outburst in deep mining. |
| first_indexed | 2024-04-12T01:30:14Z |
| format | Article |
| id | doaj.art-ff32c4bcfa8c4dcb904bf3bc6f0102c5 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-12T01:30:14Z |
| publishDate | 2022-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-ff32c4bcfa8c4dcb904bf3bc6f0102c52022-12-22T03:53:31ZengNature PortfolioScientific Reports2045-23222022-12-0112111610.1038/s41598-022-26288-7Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoringXin Zhang0Jupeng Tang1Honghao Yu2Yishan Pan3School of Mechanics and Engineering, Liaoning Technical UniversitySchool of Mechanics and Engineering, Liaoning Technical UniversitySchool of Mechanics and Engineering, Liaoning Technical UniversitySchool of Environment, Liaoning UniversityAbstract Coal and gas outburst is one of the geological disasters that seriously threaten the safety of coal mines production. In recent years, with the increase of mining depth, outbursts become frequent. To further explore the occurrence mechanism of deep coal and gas outburst, a self-developed true triaxial coal and gas outburst simulation device was used to simulate the coal and gas outburst at different depths. The results show that with the increase of simulation depth, the critical gas pressure of outburst gradually decreases, and the unit outburst intensity increases sharply. The gas threshold of deep coal and gas outburst is lower. During the incubation and excitation, gas pressure has three special variation rules, namely self-increasing characteristic, stage and instantaneous. In the early incubation, acoustic emission (AE) energy is at a low level, low energy frequency is dominant; in the later incubation, AE energy increases greatly, high energy frequency is dominant. From the perspective of AE energy, a quantitative index that reflects the danger of coal and gas outburst in the incubation is defined, which provides a scientific reference for the prediction and prevention of disasters of coal and gas outburst in deep mining.https://doi.org/10.1038/s41598-022-26288-7 |
| spellingShingle | Xin Zhang Jupeng Tang Honghao Yu Yishan Pan Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring Scientific Reports |
| title | Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring |
| title_full | Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring |
| title_fullStr | Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring |
| title_full_unstemmed | Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring |
| title_short | Gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring |
| title_sort | gas pressure evolution characteristics of deep true triaxial coal and gas outburst based on acoustic emission monitoring |
| url | https://doi.org/10.1038/s41598-022-26288-7 |
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