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| Research on control technology of two roadways in island working face |
| He Yingjie |
| Shanxi Lanhua Baisheng Coal Industry, Jincheng 048400, China |
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Abstract In view of the difficulty in controlling the two roadways in the island working face, the design optimization of the two roadways in No.3405 Face of Tang'an Mine was carried out by adopting the methods of engineering analogy and field practice, and the original roadway specification was optimized from 4.0 m ×2.7 m to 4.5 m×3.5 m; The support design was optimized from the equal strength bolt at the side to the combined support of all high-strength bolts+side anchor cables. The method of increasing the density of the roof anchor cables and increasing the initial anchor force of the anchor cables at the same time made the roadway deformation reach 500~800 mm from the original roadway floor heave about 20 days after excavation, and the two sides converged to nearly 300~500 mm; The maximum displacement to the top and bottom was 180mm, and the maximum convergence of the two sides was 200 mm. The roadway met the needs of mining.
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