Surface movement and crack development laws of super-long working faces in medium-depth coal seam mining
IntroductionWith the increased application of super-long working faces in coal mining, the surface movement and crack development laws of super-long working faces present an urgent problem to be studied and solved. This study aimed to determine the surface movement and crack development laws of supe...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-01-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2024.1526950/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841555157102362624 |
|---|---|
| author | Pengfei Hou Pengfei Hou Shuangming Wang Shuangming Wang Dong Feng Dong Feng Xiaoshen Xie Xiaoshen Xie Enke Hou Enke Hou |
| author_facet | Pengfei Hou Pengfei Hou Shuangming Wang Shuangming Wang Dong Feng Dong Feng Xiaoshen Xie Xiaoshen Xie Enke Hou Enke Hou |
| author_sort | Pengfei Hou |
| collection | DOAJ |
| description | IntroductionWith the increased application of super-long working faces in coal mining, the surface movement and crack development laws of super-long working faces present an urgent problem to be studied and solved. This study aimed to determine the surface movement and crack development laws of super-long working faces when mining medium-depth buried coal seams.MethodsThe research area in Xiaobaodang No. 2 coal mine, China, was the adjacent working faces 01, 02 and 03, with inclination widths of 300 m and 450 m, respectively. The laws were determined by applying methods such as manual surface movement observation, GNSS automatic surface movement observation, surface crack observation, and crack morphology tracing.ResultsCompared to the working face with an inclination width of 300 m, the maximum subsidence, maximum horizontal movement value, and maximum subsidence coefficient of the super-long working face with an inclination width of 450 m increased by 15.31%, 4.56%, and 16.13%, respectively. Under the influence of mining the 02 working face, the maximum subsidence of the 01 working face increased by 15% and the surface subsidence patterns of the 01 and 02 working face inclination observation lines showed an asymmetric W shape.DiscussionThe widths of the cracks parallel to the open-off cut followed the dynamic development law of opening first, then closing or semi-closing. The widths of the cracks parallel to grooves followed the dynamic development law of opening first, then remaining open. The study results are important to protect mining buildings and the ecological environment. |
| format | Article |
| id | doaj-art-3f9e7b5131c241fe91853b2be8d99c69 |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-3f9e7b5131c241fe91853b2be8d99c692025-01-08T06:11:43ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-01-011210.3389/feart.2024.15269501526950Surface movement and crack development laws of super-long working faces in medium-depth coal seam miningPengfei Hou0Pengfei Hou1Shuangming Wang2Shuangming Wang3Dong Feng4Dong Feng5Xiaoshen Xie6Xiaoshen Xie7Enke Hou8Enke Hou9College of Geology and Environment, Xi’an University of Science and Technology, Xi’an, ChinaShaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, ChinaShaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, ChinaShaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, ChinaShaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an, ChinaShaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an, ChinaIntroductionWith the increased application of super-long working faces in coal mining, the surface movement and crack development laws of super-long working faces present an urgent problem to be studied and solved. This study aimed to determine the surface movement and crack development laws of super-long working faces when mining medium-depth buried coal seams.MethodsThe research area in Xiaobaodang No. 2 coal mine, China, was the adjacent working faces 01, 02 and 03, with inclination widths of 300 m and 450 m, respectively. The laws were determined by applying methods such as manual surface movement observation, GNSS automatic surface movement observation, surface crack observation, and crack morphology tracing.ResultsCompared to the working face with an inclination width of 300 m, the maximum subsidence, maximum horizontal movement value, and maximum subsidence coefficient of the super-long working face with an inclination width of 450 m increased by 15.31%, 4.56%, and 16.13%, respectively. Under the influence of mining the 02 working face, the maximum subsidence of the 01 working face increased by 15% and the surface subsidence patterns of the 01 and 02 working face inclination observation lines showed an asymmetric W shape.DiscussionThe widths of the cracks parallel to the open-off cut followed the dynamic development law of opening first, then closing or semi-closing. The widths of the cracks parallel to grooves followed the dynamic development law of opening first, then remaining open. The study results are important to protect mining buildings and the ecological environment.https://www.frontiersin.org/articles/10.3389/feart.2024.1526950/fullmedium-depth buried coal seammining subsidencesuper-long working facessurface movement and deformationsurface cracks |
| spellingShingle | Pengfei Hou Pengfei Hou Shuangming Wang Shuangming Wang Dong Feng Dong Feng Xiaoshen Xie Xiaoshen Xie Enke Hou Enke Hou Surface movement and crack development laws of super-long working faces in medium-depth coal seam mining Frontiers in Earth Science medium-depth buried coal seam mining subsidence super-long working faces surface movement and deformation surface cracks |
| title | Surface movement and crack development laws of super-long working faces in medium-depth coal seam mining |
| title_full | Surface movement and crack development laws of super-long working faces in medium-depth coal seam mining |
| title_fullStr | Surface movement and crack development laws of super-long working faces in medium-depth coal seam mining |
| title_full_unstemmed | Surface movement and crack development laws of super-long working faces in medium-depth coal seam mining |
| title_short | Surface movement and crack development laws of super-long working faces in medium-depth coal seam mining |
| title_sort | surface movement and crack development laws of super long working faces in medium depth coal seam mining |
| topic | medium-depth buried coal seam mining subsidence super-long working faces surface movement and deformation surface cracks |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1526950/full |
| work_keys_str_mv | AT pengfeihou surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT pengfeihou surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT shuangmingwang surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT shuangmingwang surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT dongfeng surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT dongfeng surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT xiaoshenxie surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT xiaoshenxie surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT enkehou surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining AT enkehou surfacemovementandcrackdevelopmentlawsofsuperlongworkingfacesinmediumdepthcoalseammining |