Abstract
In this paper, Dongrong mine encountered soft rock geological problems as the research object, from the field investigation, laboratory analysis, program design and numerical simulation of four aspects of the problem spread out concrete research. Combining engineering geological conditions and scene construction condition, adopt big deformation nonlinearity theory and design procedures. Study the instability of soft rock tunnel, rock mineral composition and structure. Soft rock tunnel shoring method has carried out the three-dimensional numerical simulation.Studies have shown that pre-stressed anchor supporting technology can effectively control the roof deformation, single-arch bottom floor heave phenomenon can be reduced.
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