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| Study on gas drainage technology of high drainage roadway in 22212 working face of Zhenchengdi Mine |
| Wei Changsheng |
| Zhenchengdi Mine, Xishan Coal and Electricity Group Corporation Ltd., Taiyuan 030053, China |
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Abstract In order to solve the problem of difficult gas drainage in thick coal seam roadway, this paper takes 22212 working face of Zhenchengdi Coal Mine as the research background, uses numerical simulation software to analyze the stress nephogram of roadway under different layout schemes of bottom drainage roadway, and determines the layout scheme of bottom drainage roadway when the vertical distance was 12 m and the bottom drainage roadway was arranged in siltstone, At the same time, the effective radius of the bottom drainage roadway increased gradually with the drainage time, but with little relationship with the negative pressure. Through the layout of the bottom drainage roadway in 22212 working face, and the analysis of the gas drainage curve before and after the borehole punching, it was found that the drainage efficiency of the bottom drainage roadway after the hydraulic punching was excellent, which provided a certain reference for the gas drainage in thick coal seam.
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