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Segmental lining-bolt combined support is extensively applied in mechanized shield tunneling for deep tunnel. In order to reveal the mechanism of segmental lining-bolt combined support, a true three-dimensional geo-mechanical model test and numerical simulation study are conducted on the background of Xianglushan Tunnel in the Yunnan Water Diversion Project. The research results show that: (1) the...
Proposed the method of slot cartridge hole blasting to improve the efficiency of gas drainage. First, by the mean of numerical calculation, we conducted the two-dimensional simulation study on the X-shape-slotted charge blasting in the coal. It was found that along the direction of the slot the perforative main crack formed, while in the other direction a dense network of secondary cracks formed,...
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