Fabrication and application of carbon sequestration grouting material for sealing leakages in mine strata

This article carries out the preparation of new solid carbon filling materials. Its function mainly lies in isolating the upper and lower underground mining gobs for sealing the air leakage channel and sequestering carbon in underground. The carbon sequestration effect during the preparation of the material is analysed by microstructure and mechanical properties. The effect of carbon sequestration during the preparation of the material is reflected by the microstructure and mechanical properties. The study results show that the best performance of each grouting material is achieved when the cement dosage is 40%, bentonite dosage is 6%, water–solid ratio is 1:1 and sodium silicate dosage is 3%. Sodium silicate and bentonite stimulate the hydration reaction can promote the material compressive strength enhancement. A numerical simulation of grouting and plugging leakage in mining zones was carried out. The amount of interlayer air leakage quantity was reduced by 40.9% and 32.8% compared with the initial one.