Deep circular roadway precise supporting method based on surrounding rock partition

Abstract

The invention discloses a deep circular roadway precise supporting method based on surrounding rock partition. The method comprises the steps that firstly, mechanical parameters of circular roadway surrounding rock and the size of a roadway are obtained; determining the minimum damage area width of the roadway surrounding rock through the mechanical parameters and size of the surrounding rock; the maximum damage area width of the roadway surrounding rock is calculated based on the axial change theory, and the range of the surrounding rock needing to be reinforced is determined according to the minimum damage area width, the maximum damage area width and the lateral pressure coefficient; determining a minimum damage area range and a maximum damage area range according to a surrounding rock range to be reinforced; finally, targeted reinforcement is conducted in the minimum damage area range and the maximum damage area range, in this way, the situation that local surrounding rock in the maximum damage area is damaged due to too large stress, the plastic area range is large, and consequently the roadway is unstable is avoided, and it is also avoided that due to too large supporting force, the supporting strength is excessive, and consequently the supporting cost is increased.

Description

technical field [0001] The invention relates to a deep roadway supporting method, in particular to a deep circular roadway supporting method. Background technique [0002] For a long time, coal has been my country's most important primary energy and an important industrial raw material, providing a strong guarantee for my country's economic development and the stable and safe supply of national energy. Until other renewable green energy sources such as non-fossil energy take shape, the dominant position of coal resources in my country's primary energy sources will remain unchanged. [0003] In recent years, in order to meet the needs of economic development, the demand for coal resources in my country has continued to increase and the intensity and speed of coal mining have continued to increase. The mining of coal resources has also entered a period of high yield and high efficiency. The strong demand for coal has caused the shallow resources to decrease day by day, which ...

AI Technical Summary

Problems solved by technology

As a circular roadway, due to the different effects of the surrounding rock, some parts of the section are under great pressure, and some parts hardly bear the pressure of the surrounding rock. If the entire roadway section has the same support force, it will inevitably cause support Increased costs

In particular, it only gives a vague concept of zoning. When used in specific projects, operators are confused about how to define the weak bearing area, key bearing area, and strong bearing area, making the technology lack of operability. If it is defined based on experience, It is bound to have insufficient support or excessive support strength

This is why although there are many support methods at present, problems such as large deformation of surrounding rock in deep roadways, loosening and collapse, and support failure frequently occur, which is the lack of operable precise support methods

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