Feasibility study on coal based solid waste as a soil additive.

Coal resources are extensive exploitation and utilization. As a result, a large amount of coal based solid waste such as coal gangue, fly ash, and coal gasification slag was generated. These coal based solid wastes piled up indiscriminately will occupy land and pollute the ecological environment. Turning waste into treasure is an important way to dispose of these solid wastes. This study explored the feasibility of using coal gangue, fly ash and coal gasification slag as additives to improve the soil in mining areas. Conduct experimental verification of materials using physical and chemical methods. The research results indicate that coal gangue, fly ash, and coal gasification slag can be used as soil additives. Adding low content additives to the soil, such as a mixed matrix of 4% coal gangue, 2% fly ash, and 1% coal gasification slag, is superior to soil nutrients and can be used as an environmentally friendly matrix.