Research on behavior of underground pressure in shallow coal seam with three-face goaf working face
During the mining process of coal mines, coal pillars are often formed in the goaf on three sides, and the stress behavior of coal seams has a significant impact on the safety of coal mines. The upper part of panel 3104 of Xinwang Coal Mine is the room-pillar goaf of the 2# coal seam, and the lower...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-08-01
|
| Series: | Frontiers in Energy Research |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2022.975602/full |
| _version_ | 1811282661766856704 |
|---|---|
| author | Wang Yin Wang Yin Zhao Bin Deng Zhigang Lv Kun Wang Hongwei |
| author_facet | Wang Yin Wang Yin Zhao Bin Deng Zhigang Lv Kun Wang Hongwei |
| author_sort | Wang Yin |
| collection | DOAJ |
| description | During the mining process of coal mines, coal pillars are often formed in the goaf on three sides, and the stress behavior of coal seams has a significant impact on the safety of coal mines. The upper part of panel 3104 of Xinwang Coal Mine is the room-pillar goaf of the 2# coal seam, and the lower part is the goaf of the 7# coal seam. The same coal seam is adjacent to the goaf of panel 3102. Therefore, there are hidden dangers for safe mining in panel 3104 affected by the goaf on three sides. Through FLAC3D numerical simulation, on-site Pasat-M detection, microseismic monitoring, and support resistance measurement, the stress distribution law of surrounding rock in the working face is analyzed. The following conclusions are obtained. There are several high wave velocity stress concentration areas in the coal body of 3104 working face. During the mining of the working face, the mining influence 90m in front of the working face began to spread to the area of the left coal pillar, and the vertical stress at the left coal pillar began to increase. Stress concentration appears in 0–20m strata at the top of 3# coal seams. At the top of a 3# coal seam, the vertical stress concentration coefficient can reach 2 in the range of 4–12m. The influence range of 3104 working face mining advance can reach 200m. Under the influence of mining, a large number of microseismic events occurred at 160m above and 150m below 3# coal seam. This law has reference value for the mining strata behaviors of coal seams under similar conditions. |
| first_indexed | 2024-04-13T01:56:35Z |
| format | Article |
| id | doaj.art-de965854697e4a6c937dc71881839ae5 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-04-13T01:56:35Z |
| publishDate | 2022-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-de965854697e4a6c937dc71881839ae52022-12-22T03:07:44ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2022-08-011010.3389/fenrg.2022.975602975602Research on behavior of underground pressure in shallow coal seam with three-face goaf working faceWang Yin0Wang Yin1Zhao Bin2Deng Zhigang3Lv Kun4Wang Hongwei5School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaChina Coal Research Institute, Beijing, ChinaChina Coal Research Institute, Beijing, ChinaChina Coal Research Institute, Beijing, ChinaChina Coal Research Institute, Beijing, ChinaChina Coal Research Institute, Beijing, ChinaDuring the mining process of coal mines, coal pillars are often formed in the goaf on three sides, and the stress behavior of coal seams has a significant impact on the safety of coal mines. The upper part of panel 3104 of Xinwang Coal Mine is the room-pillar goaf of the 2# coal seam, and the lower part is the goaf of the 7# coal seam. The same coal seam is adjacent to the goaf of panel 3102. Therefore, there are hidden dangers for safe mining in panel 3104 affected by the goaf on three sides. Through FLAC3D numerical simulation, on-site Pasat-M detection, microseismic monitoring, and support resistance measurement, the stress distribution law of surrounding rock in the working face is analyzed. The following conclusions are obtained. There are several high wave velocity stress concentration areas in the coal body of 3104 working face. During the mining of the working face, the mining influence 90m in front of the working face began to spread to the area of the left coal pillar, and the vertical stress at the left coal pillar began to increase. Stress concentration appears in 0–20m strata at the top of 3# coal seams. At the top of a 3# coal seam, the vertical stress concentration coefficient can reach 2 in the range of 4–12m. The influence range of 3104 working face mining advance can reach 200m. Under the influence of mining, a large number of microseismic events occurred at 160m above and 150m below 3# coal seam. This law has reference value for the mining strata behaviors of coal seams under similar conditions.https://www.frontiersin.org/articles/10.3389/fenrg.2022.975602/fullroom and pillar miningmicroseismic monitoringunderground pressurethree-face goafpasat-M detection |
| spellingShingle | Wang Yin Wang Yin Zhao Bin Deng Zhigang Lv Kun Wang Hongwei Research on behavior of underground pressure in shallow coal seam with three-face goaf working face Frontiers in Energy Research room and pillar mining microseismic monitoring underground pressure three-face goaf pasat-M detection |
| title | Research on behavior of underground pressure in shallow coal seam with three-face goaf working face |
| title_full | Research on behavior of underground pressure in shallow coal seam with three-face goaf working face |
| title_fullStr | Research on behavior of underground pressure in shallow coal seam with three-face goaf working face |
| title_full_unstemmed | Research on behavior of underground pressure in shallow coal seam with three-face goaf working face |
| title_short | Research on behavior of underground pressure in shallow coal seam with three-face goaf working face |
| title_sort | research on behavior of underground pressure in shallow coal seam with three face goaf working face |
| topic | room and pillar mining microseismic monitoring underground pressure three-face goaf pasat-M detection |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2022.975602/full |
| work_keys_str_mv | AT wangyin researchonbehaviorofundergroundpressureinshallowcoalseamwiththreefacegoafworkingface AT wangyin researchonbehaviorofundergroundpressureinshallowcoalseamwiththreefacegoafworkingface AT zhaobin researchonbehaviorofundergroundpressureinshallowcoalseamwiththreefacegoafworkingface AT dengzhigang researchonbehaviorofundergroundpressureinshallowcoalseamwiththreefacegoafworkingface AT lvkun researchonbehaviorofundergroundpressureinshallowcoalseamwiththreefacegoafworkingface AT wanghongwei researchonbehaviorofundergroundpressureinshallowcoalseamwiththreefacegoafworkingface |