The cemented backfill (CB) utilizing coal gangue (CG) and fly ash (FA) is widely applied in mines. However, the bleeding shrinkage of CB leads to insufficient contact with surrounding rock, which not beneficial for controlling roof subsidence even stope stability. Herein, a foam (CFB) formulation demonstrated, employing hydrogen dioxide (H2O2) as chemical foaming agent. cement FA show noticeabl...

The over-exploitation of resources caused by the increasing coal demand has resulted in a sharp increase solid waste emissions mainly gangue, which made burden on environment, economy, resources, and society our country heavier. In order to achieve balance between energy consumption emission process top caving, this study carried out gangue recognition research based multi-source time–frequency...