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| Study on fully mechanized caving goaf air leaking speed based on tracing technology |
| Li Kaibo1, Chen Long2 |
| 1. Xiegou Mine, Shanxi Xishan Jinxing Energy Corporation Ltd., Lvliang 033000, China; 2. School of safety engineering, China University of Mining and Technology, Xuzhou 221116, China |
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Abstract In order to study air leaking law in 23107 fully mechanized working face goaf of Xiegou Mine, tracing technology (SF6 as tracing gas), the air leaking speed was measured as 0.04～0.2 m/s, fluid calculation software ANSYS was simulated to detect the distribution depth of different air leaking speed to guide the fire prevention and control. The result showed that 0.04 m/s air speed with the contour line about 14 m away from the working face, 0.06 m/s air speed with the contour line about 12 m away from the working face, 0.2 m/s air speed with the contour line about 3 m away from the working face, 0.04～0.2 m/s air speed with the contour line about 0～3 m m away from the working face.
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