The experimental study of the phosphogypsum and fly ash as gel filling materials

It could confect fine character gel filling materials using phosphogypsum as filling materials and fly ash as part cement substitute. The result of the experimentation indicated adding the phosphogypsum into filling materials could reduce the cost of filling and the environmental pollution, advance the integrative using ratio of mine resource. It was important meanings to promote the durative development of mineral resources. Fly ash not only was part cement substitute, but also meliorated the characteristic of gel which prolonged the use life of the pipelines. It also was an important direction as the technology of mine filling.