Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in China
The longwall panel of the Jiulishan coal mine is affected by floor-confined water, while the roof rock weighting makes the production management of some longwall panels difficult. This has caused engineering methods of roof cutting and pressure release to be considered. To explore the dynamic effect...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/9752767 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832565751393812480 |
|---|---|
| author | Lei Huang Shengli Yang Yanchun Xu Yaqi Luo Hongzhi Yuan |
| author_facet | Lei Huang Shengli Yang Yanchun Xu Yaqi Luo Hongzhi Yuan |
| author_sort | Lei Huang |
| collection | DOAJ |
| description | The longwall panel of the Jiulishan coal mine is affected by floor-confined water, while the roof rock weighting makes the production management of some longwall panels difficult. This has caused engineering methods of roof cutting and pressure release to be considered. To explore the dynamic effects of roof cutting and pressure release method, the 14141 longwall panel was taken as the test point, and a variety of monitoring methods were used to comprehensively analyze the characteristics of roof rock weighting, front abutment pressure, and floor mining failure. The main results are as follows: first, the weighting interval, the weighting intensity distribution, and the gateway deformation are asymmetrical. Second, the peak point of the front abutment pressure is approximately 6 m away from the coal wall, the peak stress is 7.02 MPa, the concentration coefficient is 1.54, the range of the pressure increasing area is approximately 16.4 m, and the farthest end of the front abutment pressure effect area is 22.4 m away from the coal wall. Furthermore, the maximum depth of the floor failure is at the No.17 measuring point (A117) position under the condition of one electrode distance. The maximum damage depth is 9.8 m, and the horizontal distance between the location of the maximum failure depth and the working face is 4.1~10.3 m. Finally, compared with the formula calculation value without considering the effect of roof cutting and pressure release or the adjacent 14121 longwall panel, the weighting interval and the weighting intensity, the gateway deformation, the degree of coal wall spalling, the influence range of the front abutment pressure, and the degree of floor mining failure are significantly reduced. The research results provide scientific and technological support for roof cutting and pressure release as a technical method to prevent floor water inrush and reduce the roof rock weighting intensity on the longwall panel. |
| format | Article |
| id | doaj-art-e6c16eb2c8c946d5ae3ce9d64e057fd6 |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-e6c16eb2c8c946d5ae3ce9d64e057fd62025-02-03T01:06:49ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/9752767Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in ChinaLei Huang0Shengli Yang1Yanchun Xu2Yaqi Luo3Hongzhi Yuan4School of Energy and MiningSchool of Energy and MiningSchool of Energy and MiningDepartment of Emergency and Operation SafetyHe’nan Coking Coal Energy Co.The longwall panel of the Jiulishan coal mine is affected by floor-confined water, while the roof rock weighting makes the production management of some longwall panels difficult. This has caused engineering methods of roof cutting and pressure release to be considered. To explore the dynamic effects of roof cutting and pressure release method, the 14141 longwall panel was taken as the test point, and a variety of monitoring methods were used to comprehensively analyze the characteristics of roof rock weighting, front abutment pressure, and floor mining failure. The main results are as follows: first, the weighting interval, the weighting intensity distribution, and the gateway deformation are asymmetrical. Second, the peak point of the front abutment pressure is approximately 6 m away from the coal wall, the peak stress is 7.02 MPa, the concentration coefficient is 1.54, the range of the pressure increasing area is approximately 16.4 m, and the farthest end of the front abutment pressure effect area is 22.4 m away from the coal wall. Furthermore, the maximum depth of the floor failure is at the No.17 measuring point (A117) position under the condition of one electrode distance. The maximum damage depth is 9.8 m, and the horizontal distance between the location of the maximum failure depth and the working face is 4.1~10.3 m. Finally, compared with the formula calculation value without considering the effect of roof cutting and pressure release or the adjacent 14121 longwall panel, the weighting interval and the weighting intensity, the gateway deformation, the degree of coal wall spalling, the influence range of the front abutment pressure, and the degree of floor mining failure are significantly reduced. The research results provide scientific and technological support for roof cutting and pressure release as a technical method to prevent floor water inrush and reduce the roof rock weighting intensity on the longwall panel.http://dx.doi.org/10.1155/2022/9752767 |
| spellingShingle | Lei Huang Shengli Yang Yanchun Xu Yaqi Luo Hongzhi Yuan Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in China Geofluids |
| title | Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in China |
| title_full | Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in China |
| title_fullStr | Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in China |
| title_full_unstemmed | Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in China |
| title_short | Comprehensive Monitoring Research on the Effect of Roof Cutting and Pressure Release: A Case Study of the Jiulishan Coal Mine in China |
| title_sort | comprehensive monitoring research on the effect of roof cutting and pressure release a case study of the jiulishan coal mine in china |
| url | http://dx.doi.org/10.1155/2022/9752767 |
| work_keys_str_mv | AT leihuang comprehensivemonitoringresearchontheeffectofroofcuttingandpressurereleaseacasestudyofthejiulishancoalmineinchina AT shengliyang comprehensivemonitoringresearchontheeffectofroofcuttingandpressurereleaseacasestudyofthejiulishancoalmineinchina AT yanchunxu comprehensivemonitoringresearchontheeffectofroofcuttingandpressurereleaseacasestudyofthejiulishancoalmineinchina AT yaqiluo comprehensivemonitoringresearchontheeffectofroofcuttingandpressurereleaseacasestudyofthejiulishancoalmineinchina AT hongzhiyuan comprehensivemonitoringresearchontheeffectofroofcuttingandpressurereleaseacasestudyofthejiulishancoalmineinchina |