Experimental study on the physical and mechanical variations of hot granite under different cooling treatments

Geothermal energy arrested in HDR (hot dry rock) is commonly harvested from the reservoir fractured by artificial stimulations. Understanding the physical and mechanical behaviors of HDR after different cooling treatments is critical for selecting most efficient fluid to fracture the rock mass. Here we experimentally examine the physical and mechanical variations of a typical type of HDR, granite, after natural, water, and liquid-nitrogen...