Wang Wenyong

TL;DR: In this paper, a preliminary case investigation of the coal at various mining rates in both the laboratory scale and field scale was performed, where the uniaxial compressive strength and releasable elastic strain energy (Ue) increase with increasing loading rate when the loading rate is below a threshold.

TL;DR: In this paper, the authors studied the tensile strength and deformation of deep coal samples recovered from 1000m or deeper using a rock mechanics testing system called MTS815 Flex Test GT.

TL;DR: In this paper, a pressure maintaining rock core transfer device is presented, which includes a transfer chamber, a hollow cavity with openings at both ends, the front end and the rear end of the transfer tube are separately connected with a transfer tube through sealing washers, a rock core chamber and support frames are arranged in the transfer chamber.

TL;DR: In this paper, a hole interior variable-frequency vibration anti-reflection gas extraction method and device is described, which consists of a variable frequency ultrasonic generator, an ultrasonic transducer, a gas extraction pump, an electric cabinet and a mounting shell, and after first explosion-proof guide wires are connected in series, the electromagnetic cambered surface is connected with the electric cabinet through a double-point double-throw switch.

TL;DR: In this paper, an imaging system of drilling internal fracture space attitude, belongs to the technical field of physical parameter measurement of a rock mass and aims at overcoming the shortcomings of complicated process, low degree of mechanization and low precision of measurement result of existing drilling imager adopting data line transmission and image blur or dark lines and the like caused by artificial push of a drill rod.