An experimental study on the use of fly ash for making concrete lagging of SVP steel arches in underground coal mines in Quang Ninh area

In 2020, Vietnam has 25 thermal power plants in operation, emitting a total amount of fly ash and coal bottom about 13 million tons/year. It makes increasing the costs landfill space, negatively affect environment. The major goal this study is to recommend an optimal plant be added concrete mix create lagging for SVP steel arches underground mine Quang Ninh region. order lower cost drift support improve efficiency environmental protection, used make place cement extent 30%. This also demonstrates recent development use novel materials construct rock/soil supports mines Vietnam. as partial replacement more important today. comparison strength properties laggings by experimental at Laboratory construction between two types Hanoi University Mining Geology (HUMG) will show benefits terms using ash. paper presents results on making Laboratory. ash-made products conventional mining aid demonstrating employing From study's findings, it can inferred that substitute classes such M200.