As underground phosphate mining gradually shifts to deeper areas,rock burst,as a common geological hazard in underground construction,poses serious safety risks to personnel and equipment working underground.Taking the rock burst disaster of the Wawu Ⅳ mine section in Yichang as the engineering background,the mechanical mechanism of rock burst development under different stress stages was analyzed by simulating the rock burst site,using infrared radiation thermal imaging technology,and combining the stress-strain curve with the loading and failure characteristics of the surrounding rock.The results show that the high-temperature strip along the shear fracture direction is an important precursor to rupture and can be used as a sign of rock burst warning.A rock burst classification method based on the critical burial depth criterion and infrared radiation was used to predict the burial depth and severity of rock bursts in the Wawu Ⅳ mine section,and reasonable prevention and control plans were formulated for different rock burst levels.Prevention and control measures of rock burst in deep phosphate mine includes improving the physical and mechanical properties of surrounding rock,improving the stress conditions of surrounding rock,optimizing the construction technology and reinforcing the surrounding rock.
关键词
岩爆/红外辐射/岩爆机理/岩爆防治/破坏特征
Key words
Rock burst/Infrared radiation/Mechanism of rock burst/Prevention of rock burst/Failure characteristic
维普
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