There are a large number of coal seams characterized by shallow cover and extreme
thickness in the northwest part of China. The total reserves of these coal seams account for …

Broken gangue from the collapsing roof of a longwall coal panel can be used as the
backfilling material for goaf backfilling. The particle size gradation has important influence …

The article presents a critical review on the application of development of technology in the
field of subsidence monitoring using various techniques. It consists the review of literature …

Cemented coal gangue–fly ash (CGF) mixtures are made by mixing cement, coal gangue, fly
ash and water, and the CGFs are commonly used as the backfill materials for filling …

Flooded mine workings represent potential aquifers for shallow geothermal development
projects. However, determining the collapse state of such workings in advance of drilling …

Subsidence is a depression of the ground on the surface due to extraction of minerals from
underground coal mines. It occurs in two forms, namely, trough and sinkhole subsidence …

In consideration of the high filling costs and backfill material shortage at present, backfill–
strip mining, which combines the advantages of strip mining and backfill mining, has …

Artificial construction backfilling columns underground based on coal-based solid waste
materials is an important method to slow down surface subsidence and reduce the …

This paper presents an investigation on the effect of grouting into multi-bed-separation to
control mining-induced surface subsidence. In the overburden without obvious thick-and …

The rheological characteristics for the complex hydro-mixture of coal combustion products
(CCPs) such as fly ash and fly ash-bottom ash mixture slurry at high solids concentration in …