Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology
The first weighting control is one of the difficult problems that cannot be avoided in the safe and efficient production of longwall mining face. To optimize the existing pressure releasing technology of open-off cut, the open-off cut roof cutting pressure releasing (OCRCPR) technology is put forwar...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/9989213 |
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| _version_ | 1832550046234574848 |
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| author | Xingen Ma Manchao He Weidong Li Yilong Wang Lifeng Li Xiaohu Sun Yongyuan Li Leiyu Gu Xingfeng Sha |
| author_facet | Xingen Ma Manchao He Weidong Li Yilong Wang Lifeng Li Xiaohu Sun Yongyuan Li Leiyu Gu Xingfeng Sha |
| author_sort | Xingen Ma |
| collection | DOAJ |
| description | The first weighting control is one of the difficult problems that cannot be avoided in the safe and efficient production of longwall mining face. To optimize the existing pressure releasing technology of open-off cut, the open-off cut roof cutting pressure releasing (OCRCPR) technology is put forward on the basis of roof cutting pressure releasing gob-side entry retaining (RCPRGER) technology. Firstly, the mechanism of the technology and the design method of related key parameters are summarized. Then the pressure releasing effect of OCRCPR and the stress environment change under this technology are analyzed by mechanics calculation and numerical simulation, respectively, which verify the feasibility of the OCRCPR technology from the theoretical level. Finally, a test mining face is taken as an example to implement the field test. The field test results show that the OCRCPR can effectively shorten the first weighting step and weaken the first weighting strength and has a good pressure releasing effect. |
| format | Article |
| id | doaj-art-0d4849f543da41efac72a654c9f8ba18 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-0d4849f543da41efac72a654c9f8ba182025-02-03T06:07:43ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/99892139989213Research and Application of Open-Off Cut Roof Cutting Pressure Releasing TechnologyXingen Ma0Manchao He1Weidong Li2Yilong Wang3Lifeng Li4Xiaohu Sun5Yongyuan Li6Leiyu Gu7Xingfeng Sha8Huaneng Coal Technology Research Co., Ltd., China Huaneng, Beijing 100070, ChinaState Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, ChinaHuaneng Coal Technology Research Co., Ltd., China Huaneng, Beijing 100070, ChinaHuaneng Coal Technology Research Co., Ltd., China Huaneng, Beijing 100070, ChinaSchool of Architecture and Civil Engineering, Guizhou University of Engineering Science, Bijie, Guizhou 551700, ChinaHuaneng Coal Technology Research Co., Ltd., China Huaneng, Beijing 100070, ChinaHuaneng Coal Technology Research Co., Ltd., China Huaneng, Beijing 100070, ChinaHuaneng Coal Technology Research Co., Ltd., China Huaneng, Beijing 100070, ChinaHuaneng Coal Technology Research Co., Ltd., China Huaneng, Beijing 100070, ChinaThe first weighting control is one of the difficult problems that cannot be avoided in the safe and efficient production of longwall mining face. To optimize the existing pressure releasing technology of open-off cut, the open-off cut roof cutting pressure releasing (OCRCPR) technology is put forward on the basis of roof cutting pressure releasing gob-side entry retaining (RCPRGER) technology. Firstly, the mechanism of the technology and the design method of related key parameters are summarized. Then the pressure releasing effect of OCRCPR and the stress environment change under this technology are analyzed by mechanics calculation and numerical simulation, respectively, which verify the feasibility of the OCRCPR technology from the theoretical level. Finally, a test mining face is taken as an example to implement the field test. The field test results show that the OCRCPR can effectively shorten the first weighting step and weaken the first weighting strength and has a good pressure releasing effect.http://dx.doi.org/10.1155/2021/9989213 |
| spellingShingle | Xingen Ma Manchao He Weidong Li Yilong Wang Lifeng Li Xiaohu Sun Yongyuan Li Leiyu Gu Xingfeng Sha Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology Advances in Civil Engineering |
| title | Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology |
| title_full | Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology |
| title_fullStr | Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology |
| title_full_unstemmed | Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology |
| title_short | Research and Application of Open-Off Cut Roof Cutting Pressure Releasing Technology |
| title_sort | research and application of open off cut roof cutting pressure releasing technology |
| url | http://dx.doi.org/10.1155/2021/9989213 |
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