Prewetting of coal seams by water infusion is an essential measure for dust control at working faces.
煤层注水预湿是采煤工作面防尘的治本措施，添加湿润剂是改善煤层注水效果的重要途径。
It shows that the shrinkage caused by the large content of cement can reduce by partial filling prewetting haydite in the high-strength and lightweight aggregate concrete.
结果表明，通过在高强混凝土中掺加部分提前用水浸泡过陶粒的办法，可以减少高强混凝土因水泥用量过大而引起的较大收缩。
Prewetting of coal seams by water infusion is an essential measure for dust control at working faces. Adding of wetting agent is an important approach for improving water infusion.
煤层注水预湿是采煤工作面防尘的治本措施，添加湿润剂是改善煤层注水效果的重要途径。
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