Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry Retaining
In order to solve the problems of the high cost and time consumption of half coal rock entry driving, low coal recovery rate, and stress concentration on filling support body of retained entry along gob, the innovative 110 mining method based on pressure relief by roof cutting was adopted in 6302 th...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/8228604 |
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| author | Eryu Wang Xiangdong Chen Xiaojie Yang |
| author_facet | Eryu Wang Xiangdong Chen Xiaojie Yang |
| author_sort | Eryu Wang |
| collection | DOAJ |
| description | In order to solve the problems of the high cost and time consumption of half coal rock entry driving, low coal recovery rate, and stress concentration on filling support body of retained entry along gob, the innovative 110 mining method based on pressure relief by roof cutting was adopted in 6302 thin coal seam working face of Baoshan Coal Mine. First the technical principle and key technology of this mining method was presented. Then, through theoretical analysis and calculation, engineering experience, and field test, the key parameters such as the length of constant resistance anchor cable, the cutting angle and height of presplitting blasting, the charge structure, and the blocking-gangue support structure were determined and conducted in the retained entry. The broken expanded coefficient varying law of caved gangue with time and space was obtained, which revealed roof movement characteristic. The displacement monitoring curve of the roof and floor indicated that the maximum subsidence of the roof was about 150 mm and the maximum amount of floor heaving was 100 mm, which were quite small. The field monitoring data indicated that the entry retaining effect is good, which indicated that the innovative 110 mining method can be an effective way for reducing the high cost and time consumption of half coal rock entry driving, enhancing the coal recovery rate and preventing the dynamic mine pressure disasters. |
| format | Article |
| id | doaj-art-9f33934d0bf044d0b8a01be6a36af2aa |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-9f33934d0bf044d0b8a01be6a36af2aa2025-08-20T02:18:32ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/82286048228604Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry RetainingEryu Wang0Xiangdong Chen1Xiaojie Yang2School of Mining and Coal Engineering, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014000, ChinaSchool of Mining and Coal Engineering, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014000, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Beijing), Beijing 100083, ChinaIn order to solve the problems of the high cost and time consumption of half coal rock entry driving, low coal recovery rate, and stress concentration on filling support body of retained entry along gob, the innovative 110 mining method based on pressure relief by roof cutting was adopted in 6302 thin coal seam working face of Baoshan Coal Mine. First the technical principle and key technology of this mining method was presented. Then, through theoretical analysis and calculation, engineering experience, and field test, the key parameters such as the length of constant resistance anchor cable, the cutting angle and height of presplitting blasting, the charge structure, and the blocking-gangue support structure were determined and conducted in the retained entry. The broken expanded coefficient varying law of caved gangue with time and space was obtained, which revealed roof movement characteristic. The displacement monitoring curve of the roof and floor indicated that the maximum subsidence of the roof was about 150 mm and the maximum amount of floor heaving was 100 mm, which were quite small. The field monitoring data indicated that the entry retaining effect is good, which indicated that the innovative 110 mining method can be an effective way for reducing the high cost and time consumption of half coal rock entry driving, enhancing the coal recovery rate and preventing the dynamic mine pressure disasters.http://dx.doi.org/10.1155/2021/8228604 |
| spellingShingle | Eryu Wang Xiangdong Chen Xiaojie Yang Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry Retaining Shock and Vibration |
| title | Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry Retaining |
| title_full | Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry Retaining |
| title_fullStr | Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry Retaining |
| title_full_unstemmed | Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry Retaining |
| title_short | Research and Application of an Innovative 110 Mining Method in Gob-Side Half Coal Rock Entry Retaining |
| title_sort | research and application of an innovative 110 mining method in gob side half coal rock entry retaining |
| url | http://dx.doi.org/10.1155/2021/8228604 |
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