Abstract: AbstractAs a new mechanical sealing method, the sealing and burst and collapse strength of expansion tube patching technology is difficult to meet the requirements of large-scale volume fracturing with large displacement ...

Abstract: To develop a purely inorganic fire-retardant-modified asphalt, we selected highly fire-retardant materials that have low-carbon content, non-polluting properties, and are inexpensive as fire retarder of asphalt. The optimal ...

Abstract: An optimal design method for the main bearing of a tunnel boring machine is proposed. In this method, the fatigue life is used as the objective function. Structural parameters, including clearance, are considered as design ...