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| Research and application of ground perfusion old roadway filling technology in Shengxin Coal Industry |
| Feng Haining, Qi Xu, Yang Jin |
| Ordos Shengxin Coal Industry Co., Ltd., Ordos 017000, China |
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Abstract In order to realize the safe production of No.42201 Face in Shengxin Coal Industry, the research on old roadway filling technology was carried out. On the basis of comparing different old roadway treatment methods and different grouting materials, the ground filling technology with high water material was determined. 11 directional filling boreholes were constructed on the ground, and the old roadway was sealed with chemical materials. After filling the old roadway, the working resistance remained stable during the mining process of the working face, no obvious spalling and roof fall occurred, and the ideal filling effect was achieved.
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