146 / 2022-02-05 12:01:48

Mechanism of water conservation coal mining with CO2 mineralized coal based solid waste filling

disposal and utilization of CO2, water conservation, coal based solid waste, CO2 mineralized filling materials, mineralized grouting materials

Resource Development and Utilization > 12. Development and Utilization of Low Carbon Coal

A large amount of CO₂, fly ash and goaf will be produced in the process of coal mining and utilization, which will induce a series of problems, such as environmental pollution, surface subsidence, groundwater loss and so on. If CO₂, fly ash and other coal-based solid wastes can be filled into the goaf, the waste will be turned into treasure. This paper attempts to use CO₂ and fly ash as the main raw materials to develop new CO₂ mineralized filling materials and mineralized grouting materials. On the basis of testing the mechanical properties of CO₂ mineralized materials, the rock movement and fracture development characteristics of mineralized materials during filling and mining are studied, and the performance of mineralized grouting materials to block mining fractures is discussed. Optimize and determine the key parameters such as reasonable mining height, mining width and filling proportion of CO₂ mineralized material filling, so as to realize the efficient disposal and utilization of CO₂ and fly ash. The research on the mechanism and mining method of CO₂ mineralized coal based solid waste filling and water conservation mining has important engineering and scientific significance for the of water conservation and the disposal and utilization of CO₂ and mine solid waste.