In order to build green mines, goaf is often filled, supported, and sealed with a high-water material eliminate series of environmental problems safety hazards caused by goaf. this study, ordinary Portland cement, sulphoaluminate alkali-activated cement were used as binders prepare full-tailings materials for filling, various water-to-cement ratios. The compressive strength development consolid...

When the high-speed railway construction project passes through goaf sites, uncertain impacts from internal and external environments faced by system are gradually characterized complexity variability, disastrous consequences becoming increasingly prominent. The risk resistance ability accident recovery of subgrade crucial for improving safety management level site. Based on concept resilience,...

Aiming at the fuzziness and randomness of goaf stability classification, to obtain classification more objectively, an entropy weight-normal cloud model for is proposed. Based on geological conditions engineering conditions, 14 indexes that affect a are selected establish evaluation index system, weight each determined using method, which makes distribution objective. theory, numerical characte...

Large–scale underground coal mining is bound to cause serious surface subsidence problems. However, conventional filling and methods have problems such as high cost process difficulty. In order achieve the purpose of efficiency low cost, this paper proposes using technology CGSG. To effective control overburden strata movement ground settlement cemented gangue strip in goaf (CGSG), studies desi...

In this paper, a numerical calculation model of the mining face was established to analyze rational size coal pillars in goaf on both sides by using FLAC3D based geological conditions pilot area. Furthermore, feasibility co-ordinated reinforcement with steel pipe column explored, which can be applied recycling residual resources like protecting and great value increase recovery rate gobs as well.