In view of the high cost and low strength of the paste cement filling used at present in mines, it was proposed to use partial fly ash in stead of cement as the binding agent.

BP officials say the static kill is the first step in a two-part operation that involves filling the well pipe with cement to block the release of oil and natural gas.

According to gradation of tailings, the knowledge bank model can predict the strengths of cemented tailings in different contents of cement or consistence, and guide filling design in mine.