Abstract: Provided are a protecting trolley and a construction method of rock burst prewarning protection system in non-contact tunnel construction. The protecting trolley includes a framework, a walking assembly, a rockfall buffering assembly, a spraying assembly and a rock burst prewarning system. The rockfall buffering assembly includes an arch frame in a fixed connection with the framework and a protecting net fixed on the arch frame. The spraying assembly includes a track car in connection with the rockfall buffering assembly and a spraying hose fixed on the track car, and the spraying hose sprays towards the surrounding rock. The rock burst prewarning assembly includes a thermosensitive infrared sensor used for detecting the temperature of the surrounding rock and a highly sensitive laser sensor used for detecting the deformation of the surrounding rock.

Abstract: A coal uncovering construction method for blasting large cross-section gas tunnels includes: analyzing stress distribution characteristics in front of a tunnel boring working face, and then determining a thickness calculation model of a reserved rock wall based on a limit equilibrium theory; establishing a tunnel model, simulating a construction condition and analyzing a construction result, and determining a thickness of the reserved rock wall; and fixing a detonator through a fixed sand ring, fitting the detonator with a construction hole by adjusting an adjustable protective plate, then embedding the detonator into a blast hole, and blasting the detonator for tunnel construction. Furthermore, an extension ring is fixed between the fixed sand ring and the adjustable protective plate.

Abstract: Provided are a protecting trolley and a construction method of rock burst prewarning protection system in non-contact tunnel construction. The protecting trolley includes a framework, a walking assembly, a rockfall buffering assembly, a spraying assembly and a rock burst prewarning system. The rockfall buffering assembly includes an arch frame in a fixed connection with the framework and a protecting net fixed on the arch frame. The spraying assembly includes a track car in connection with the rockfall buffering assembly and a spraying hose fixed on the track car, and the spraying hose sprays towards the surrounding rock. The rock burst prewarning assembly includes a thermosensitive infrared sensor used for detecting the temperature of the surrounding rock and a highly sensitive laser sensor used for detecting the deformation of the surrounding rock.