Yield primary supporting method adapting to roadway deformation

Abstract

The invention discloses a yield primary supporting method adapting to roadway deformation. The method comprises the following steps that at least one multi-stage variable-frequency yield structure is arranged on the tunneling fracture surface of a roadway surrounding rock, and the multi-stage variable-frequency yield structures are provided with multi-stage critical deformation loads and deformation distances corresponding to all stage critical deformation loads; and when the pressure of the surrounding rock is increased to the primary critical deformation load, yield deformation occurs to the multi-stage variable-frequency yield structures, and the deformation distance of yield deformation corresponds to the critical deformation load achieved by the surrounding rock pressure. According to the yield primary supporting method adapting to roadway deformation, through arrangement of the variable-frequency yield structures, the support yield load value is automatically changed along with the surrounding rock pressure and deformation, through primary supporting, surrounding rock pressure releasing and impact eliminating are completed, and the problem that a roadway support is impacted through deep well large deformation is solved.

Description

technical field [0001] The invention relates to the relevant technical field of roadway support, in particular to a yielding primary support method adapted to roadway deformation. Background technique [0002] For coal mine roadway support, with the increase of mining depth, more and more mines have entered deep mining, and the problem of "three highs and one disturbance" has become increasingly serious. The surrounding rock of the roadway has impact phenomenon and rheological characteristics. For some mines, almost 90% of the roadways have to be repaired 3-4 times a year, which greatly increases the production cost, seriously restricts the normal production continuity of the mine, and poses a huge threat to the safe and efficient production of coal mines. The original technical methods have been unable to solve these problems. In order to solve this problem, many experts and scholars have proposed a variety of technical methods. For example, in the secondary support theo...

AI Technical Summary

Problems solved by technology

[0008] Based on this, it is necessary to provide a yielding support method that adapts to the deformation of the roadway in view of the fact that the existing technology does not solve the problem of multiple repairs in the roadway support

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