Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face
To control the problem of coal wall spalling in large mining height working faces subject to mining, considering the Duanwang Mine 150505 fully mechanized working face, the mechanism of coal wall spalling in working faces was investigated by theoretical analysis, numerical simulation and field exper...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/22/8675 |
| _version_ | 1797464047419916288 |
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| author | Hongtao Liu Yang Chen Zijun Han Qinyu Liu Zilong Luo Wencong Cheng Hongkai Zhang Shizhu Qiu Haozhu Wang |
| author_facet | Hongtao Liu Yang Chen Zijun Han Qinyu Liu Zilong Luo Wencong Cheng Hongkai Zhang Shizhu Qiu Haozhu Wang |
| author_sort | Hongtao Liu |
| collection | DOAJ |
| description | To control the problem of coal wall spalling in large mining height working faces subject to mining, considering the Duanwang Mine 150505 fully mechanized working face, the mechanism of coal wall spalling in working faces was investigated by theoretical analysis, numerical simulation and field experiment. Based on analysis of coal wall spalling in the working face, a new grouting material was developed. The stress and plastic zone changes affecting the coal wall, before and after grouting in the working face, were analyzed using numerical simulation and surrounding rock grouting reinforcement technology was proposed for application around the new grouting material. The results showed that: (1) serious spalling of the 150505 working face was caused by the large mining height, fault influence and low roof strength, and (2) the new nano-composite low temperature polymer materials used have characteristics of rapid reaction, low polymerization temperature, adjustable setting time, high strength and environmental protection. Based on analysis of the working face coal wall spalling problem, grouting reinforcement technology based on new materials was proposed. Industrial tests were carried out on the working face. Field monitoring showed that the stability of the working face coal wall was significantly enhanced and that rib spalling was significantly improved after comprehensive anti-rib-spalling grouting measures were adopted. These results provide a basis for rib spalling control of working faces under similar conditions. |
| first_indexed | 2024-03-09T18:01:24Z |
| format | Article |
| id | doaj.art-c6846ec6921a4f97afba136d7c4d26a0 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T18:01:24Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c6846ec6921a4f97afba136d7c4d26a02023-11-24T09:53:58ZengMDPI AGSensors1424-82202022-11-012222867510.3390/s22228675Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working FaceHongtao Liu0Yang Chen1Zijun Han2Qinyu Liu3Zilong Luo4Wencong Cheng5Hongkai Zhang6Shizhu Qiu7Haozhu Wang8School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaTo control the problem of coal wall spalling in large mining height working faces subject to mining, considering the Duanwang Mine 150505 fully mechanized working face, the mechanism of coal wall spalling in working faces was investigated by theoretical analysis, numerical simulation and field experiment. Based on analysis of coal wall spalling in the working face, a new grouting material was developed. The stress and plastic zone changes affecting the coal wall, before and after grouting in the working face, were analyzed using numerical simulation and surrounding rock grouting reinforcement technology was proposed for application around the new grouting material. The results showed that: (1) serious spalling of the 150505 working face was caused by the large mining height, fault influence and low roof strength, and (2) the new nano-composite low temperature polymer materials used have characteristics of rapid reaction, low polymerization temperature, adjustable setting time, high strength and environmental protection. Based on analysis of the working face coal wall spalling problem, grouting reinforcement technology based on new materials was proposed. Industrial tests were carried out on the working face. Field monitoring showed that the stability of the working face coal wall was significantly enhanced and that rib spalling was significantly improved after comprehensive anti-rib-spalling grouting measures were adopted. These results provide a basis for rib spalling control of working faces under similar conditions.https://www.mdpi.com/1424-8220/22/22/8675roof subsidencegrouting reinforcementroadway supportdestruction of surrounding rockdynamic pressure roadway |
| spellingShingle | Hongtao Liu Yang Chen Zijun Han Qinyu Liu Zilong Luo Wencong Cheng Hongkai Zhang Shizhu Qiu Haozhu Wang Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face Sensors roof subsidence grouting reinforcement roadway support destruction of surrounding rock dynamic pressure roadway |
| title | Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face |
| title_full | Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face |
| title_fullStr | Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face |
| title_full_unstemmed | Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face |
| title_short | Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face |
| title_sort | coal wall spalling mechanism and grouting reinforcement technology of large mining height working face |
| topic | roof subsidence grouting reinforcement roadway support destruction of surrounding rock dynamic pressure roadway |
| url | https://www.mdpi.com/1424-8220/22/22/8675 |
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