Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field Method
AbstractThe roof structure of the stope is the core of revealing the weighting mechanism and determining the working resistance of support. The Shenfu Dongsheng coal field of China has abundant reserves of shallow coal seam. The phenomena of strong ground pressure and step subsidence...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
GeoScienceWorld
2022-03-01
|
| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%204/4328618/612780/Research-on-Roof-Structure-and-Determination-of |
| _version_ | 1811239374533165056 |
|---|---|
| author | Yanpeng He Qingxiang Huang |
| author_facet | Yanpeng He Qingxiang Huang |
| author_sort | Yanpeng He |
| collection | DOAJ |
| description |
AbstractThe roof structure of the stope is the core of revealing the weighting mechanism and determining the working resistance of support. The Shenfu Dongsheng coal field of China has abundant reserves of shallow coal seam. The phenomena of strong ground pressure and step subsidence caused by the mining of shallow buried single key stratum (SBSKS) poses a serious threat to the fragile environment. Revealing the shape and movement process of roof structure of SBSKS is the primary prerequisite for ensuring safe mining of working face. Firstly, the field measurement technology of the space grid-like drill field was developed to construct vertical holes and incline holes in the auxiliary headgate gateway and tailgate airway ahead of the working face and to obtain the measured data of the broken position and vertical displacement of the roof by the drilling peep and multipoint displacement. Secondly, the key parameters of the stope roof were analyzed by the grid drillhole filed method, for example, the inclined roof break angle, the rotation angle, the thickness of equivalent immediate roof (EIR), and the roof structure-articulated level and shape. Then, we combined with the mining face comparison of compression laws revealing the time and space relationship between the movement of the roof structure and the roof weighting, and three more dangerous states of the roof were determined. Finally, the roof structure of SBSKS is moved upward through the field research on the 22201 working face, the “high step rock beam” structure and the advanced breaking position of the roof are obtained, and the calculation equation of the support resistance in large mining height face is given. The research results provide scientific guidance for the safety of SBSKS coal seam and provide technical support for green mining in ecologically fragile mining areas. |
| first_indexed | 2024-04-12T12:59:46Z |
| format | Article |
| id | doaj.art-0c341a6cb54549afacd8fd81a3482b68 |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-04-12T12:59:46Z |
| publishDate | 2022-03-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-0c341a6cb54549afacd8fd81a3482b682022-12-22T03:32:11ZengGeoScienceWorldLithosphere1941-82641947-42532022-03-012021Special 410.2113/2022/4328618Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field MethodYanpeng He0http://orcid.org/0000-0003-4693-2092Qingxiang Huang1http://orcid.org/0000-0002-6276-4204School of Energy Engineering Xi’an University of Science and Technology Shaanxi Xi’an 710054 China xust.edu.cnSchool of Energy Engineering Xi’an University of Science and Technology Shaanxi Xi’an 710054 China xust.edu.cn AbstractThe roof structure of the stope is the core of revealing the weighting mechanism and determining the working resistance of support. The Shenfu Dongsheng coal field of China has abundant reserves of shallow coal seam. The phenomena of strong ground pressure and step subsidence caused by the mining of shallow buried single key stratum (SBSKS) poses a serious threat to the fragile environment. Revealing the shape and movement process of roof structure of SBSKS is the primary prerequisite for ensuring safe mining of working face. Firstly, the field measurement technology of the space grid-like drill field was developed to construct vertical holes and incline holes in the auxiliary headgate gateway and tailgate airway ahead of the working face and to obtain the measured data of the broken position and vertical displacement of the roof by the drilling peep and multipoint displacement. Secondly, the key parameters of the stope roof were analyzed by the grid drillhole filed method, for example, the inclined roof break angle, the rotation angle, the thickness of equivalent immediate roof (EIR), and the roof structure-articulated level and shape. Then, we combined with the mining face comparison of compression laws revealing the time and space relationship between the movement of the roof structure and the roof weighting, and three more dangerous states of the roof were determined. Finally, the roof structure of SBSKS is moved upward through the field research on the 22201 working face, the “high step rock beam” structure and the advanced breaking position of the roof are obtained, and the calculation equation of the support resistance in large mining height face is given. The research results provide scientific guidance for the safety of SBSKS coal seam and provide technical support for green mining in ecologically fragile mining areas.https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%204/4328618/612780/Research-on-Roof-Structure-and-Determination-of |
| spellingShingle | Yanpeng He Qingxiang Huang Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field Method Lithosphere |
| title | Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field Method |
| title_full | Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field Method |
| title_fullStr | Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field Method |
| title_full_unstemmed | Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field Method |
| title_short | Research on Roof Structure and Determination of Working Resistance of Shallow Buried Single Key Stratum Based on Grid Drillhole Field Method |
| title_sort | research on roof structure and determination of working resistance of shallow buried single key stratum based on grid drillhole field method |
| url | https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%204/4328618/612780/Research-on-Roof-Structure-and-Determination-of |
| work_keys_str_mv | AT yanpenghe researchonroofstructureanddeterminationofworkingresistanceofshallowburiedsinglekeystratumbasedongriddrillholefieldmethod AT qingxianghuang researchonroofstructureanddeterminationofworkingresistanceofshallowburiedsinglekeystratumbasedongriddrillholefieldmethod |