Engineering Practice of Inclined Longwall Roof Cutting and Pressure Relief Gob‐Retaining Roadway Technology in Feitian Coal Mine.
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| Title: | Engineering Practice of Inclined Longwall Roof Cutting and Pressure Relief Gob‐Retaining Roadway Technology in Feitian Coal Mine. |
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| Authors: | Xu, Xianbi1 (AUTHOR), Ma, Zhenqian2 (AUTHOR) zqma@gzu.edu.cn, Huang, Jun1 (AUTHOR), Zhu, Yuankun2 (AUTHOR) |
| Source: | Energy Science & Engineering. Nov2025, Vol. 13 Issue 11, p5660-5671. 12p. |
| Subject Terms: | *Coal mining, *Longwall mining, *Mining engineering, *Pressure control, *Excavation (Civil engineering), *Mines & mineral resources |
| Abstract: | To address the issues of tight mining‐excavation scheduling and challenging gas management in coal mines, this study proposes a technical scheme for inclined longwall roof cutting and pressure relief pillarless mining. By implementing key technologies, including directional cumulative blasting for roof cutting, advanced cable bolt support, and dynamic gob‐retaining sealing, the 210701 transport roadway in Feitian Coal Mine successfully achieved 950 m of gob‐side retained roadway, with an average width of 4.2 m and height of 2.4 m. Results indicate that this technology reduces roadway excavation by 950 m, accelerates working face formation by 4 months, saves 6.65 million yuan in costs, recovers an additional 15,000 tons of coal resources, and establishes optimal conditions for gas control. The findings offer both a theoretical foundation and engineering guidance for pillarless mining under analogous geological conditions. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | To address the issues of tight mining‐excavation scheduling and challenging gas management in coal mines, this study proposes a technical scheme for inclined longwall roof cutting and pressure relief pillarless mining. By implementing key technologies, including directional cumulative blasting for roof cutting, advanced cable bolt support, and dynamic gob‐retaining sealing, the 210701 transport roadway in Feitian Coal Mine successfully achieved 950 m of gob‐side retained roadway, with an average width of 4.2 m and height of 2.4 m. Results indicate that this technology reduces roadway excavation by 950 m, accelerates working face formation by 4 months, saves 6.65 million yuan in costs, recovers an additional 15,000 tons of coal resources, and establishes optimal conditions for gas control. The findings offer both a theoretical foundation and engineering guidance for pillarless mining under analogous geological conditions. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20500505 |
| DOI: | 10.1002/ese3.70274 |
