Construction of earth rock-fill dam and application of placing-material box;

this article gave an initial probe into fill system, stope standard, slice height, landing method, stopping structure, paving material & stope supporting according to the flat-backcut-and-dry-placed-fill technology

The structure, paving techniques and the future of some type of polyurethane plastic playgrounds, such as the coiled plastic course with surface embossing, the plastic course with granular surface which sprayed by mixture of rubber pellet and polyurethane prepolymer, low cost two layer plastic course, and special paving material were introduced.