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由於水沙充填在技术上和经济上较其他充填方法具有很多优点，同时我国厚煤层特多，使用水沙充填的经验又比较丰富，这就决定了水沙充填将有极大的发展前途。随着我国和社会主义的建设，国民经济对煤矿生产的要求日益增高，因而需要进一步研究水沙充填各方面的问题，使其在技术
As the water and sediment filling technically and economically has many advantages over other filling methods, meanwhile, the thick coal seams in our country are very plentiful, and the experience of using water and sediment filling is rather rich. This determines that there will be a great development prospect for water and sediment filling. With the construction of our country and socialism, the requirements of the national economy for the production of coal mines are increasing day by day. Therefore, it is necessary to further study various aspects of water and sediment filling in order to make it a technology-based