Intensive and massive coal mining causes a series of geological hazards and environmental problems, especially surface subsidence.At present, two major types of subsidence control technology are applied: backfilling technology and partial mining technology.However, the cost of Supplements backfill mining is high and partial mining has a low recover
While the Coronavirus Disease 2019 (COVID-19) pandemic continues to wreak havoc across the nation and the globe as one of the most significant global health crises of our time, recent attention has been turned to the effects of COVID-19 Library on pregnancy and the puerperium.Although most cases have been asymptomatic, for some patients, the diseas
Due to the current diffusion of reinforced concrete (RC) walls structures and the introduction of new concrete cords, RC walls are an important structural element such as beams, plates and columns.The experimental program included casting and testing of eight two-way thin geopolymer concrete wall panels by using local Iraqi material such as metakao