Structure and method for preventing large deformation slippage of lateral wall of high stress tunnel

Abstract

The invention provides a structure and a method for preventing large deformation slippage of a lateral wall of a high stress tunnel. The structure comprises a high stress tunnel wall, high-strength low-looseness large-diameter anchor ropes, a channel steel, a rectangular coupler and a lockset, wherein the high stress tunnel top and bottom plate surrounding rock and two walls are combined into one integrated body by arranging a plurality of high-strength low-looseness large-diameter anchor ropes which are connected with wall control devices; the port exposed parts of the upper and lower inclined anchor ropes penetrate through the metal channel steels and the rectangular coupler sequentially; double-port metal channel steels are fastened at the central area of the high stress tunnel wall after the anchor ropes exert a high stress; and the rectangular coupler is fastened and adhered to the internal central part of the metal channel steel, so that the coal layer compression strength of the lateral wall of the high stress tunnel is enhanced, the large deformation slippage of the coal rock at the lateral wall is restricted; the support stability of two walls of the high stress tunnel is ensured; and the whole structure is simple and reasonable, high in security coefficient, convenient in material machining and installation, low in cost, and good in effect and has wide practicability and popularization values.

Description

technical field [0001] The invention relates to a structure and method for preventing large deformation and sliding of side walls of high-stress roadways, and is especially suitable for reinforced support of high-stress roadways under tunnels or coal mines. Background technique [0002] High-stress roadways can be divided into two categories: tectonic stress type and engineering disturbance type in terms of stress formation types. Tectonic stress-type high-stress roadway is mainly to arrange the excavation roadway in the natural high-stress zone belt formed naturally with the movement of the crust, such as the fold fault area; engineering disturbance type high-stress roadway is due to the influence of the mining disturbance of the adjacent working face and the spatial three-dimensional intersection roadway. Engineering disturbances such as excavation and renovation lead to high bearing stress in the roadway. With the increase of coal mining depth in my country, the geologic...

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Problems solved by technology

The above four control methods all play a certain role in the deformation and slippage of coal sides with different stresses. The first method is difficult to form a high-strength support structure, which is suitable for the control of two sides of the roadway when the stress of the surrounding rock is small; The tightening force can play a certain supporting effect on the deformation of the surrounding rock of the roadway in a small range, but because the lock is locked at the opening of the channel steel, under the superimposed action of the high pre-tightening force of the anchor cable and the high stress of the coal side, Serious stress concentration is caused, and a large number of cracks appear in the surrounding rock around the opening of the channel steel on the two sides of the high-stress roadway, and the opening is prone to tearing, which destroys the overall structure of the high-stress roadway side; method 3 and method 4 have better control effects, However, the process is complicated, and the cost of supporting materials is high, so it is difficult to carry out extensive use in high-stress roadways

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