flyash

The paper introduced the construction technology of liquid flyash pouring retailing backwall in order to assure refill quality of retailing backwall,protect retailing backwall depression or jumping.

介绍了为保证台背回填质量,防止台背沉陷或跳车,在地形受限制的地方,采用煤灰灌注台背的,对这项的方法、步骤和注意事项进行了详细的阐述。