水力充填中,当倍线超过一定界限时,就会使充填工作遭受极大的困难,不是容易堵管子就是输沙量极小,特别是浅部煤层中更显得严重,由于这个原因新汶孙村矿,有为数不少的煤藏量就没有开采,在目前情况下,通常多采用新开沙井的办法来加以解决,这样做无疑会增加一大批投资,所以这个问题具有广泛而巨大的现实意义。 Hydraulic filling, when the fold line exceeds a certain limit, it will fill the work suffered great difficulties, not easy to plug the pipe is a very small amount of sediment, especially in shallow coal seam more serious, for this reason In the case of village mines, a large number of coal reserves are not mined. In the current situation, the use of newly opened manholes is usually more often used to solve this problem. This will undoubtedly increase a large number of investments, so this issue has a wide and huge reality significance.