Method for retaining gob-side tunnel

Abstract

The invention discloses a method for retaining a gob-side tunnel, which overall arranges the retaining of the gob-side tunnel in a stope working face gateway tunneling period, and comprises the steps of: combining the stope working face gateway with the gob-side retained tunnel, namely the next section gateway, together to be served as one tunnel for tunneling; and constructing tunnel concrete pier columns between the stope working face gateway and the gob-side retained tunnel, wherein the tunnel concrete pier columns are served as support in the tunnel and also served as one part of the side support for the gob-side retained tunnel; namely comprising the steps of: widening the section of the tunnel by tunneling, reserving the tunnel section according to the shrinkage factor of the god-side retained tunnel suffering from two times of support pressure, and pouring the reinforcing steel bar concrete pier columns in middle of the transverse direction of the tunnel to match with a cable anchor for supporting. The tunnel concrete pier columns are arranged along the whole length of the tunnel at intervals, and used for dividing the tunnel into two parts. Insulating walls are constructed between two adjacent columns after the columns are constructed. When the stope is starting, the support is needed to be temporarily reinforced at two sides of the columns according to requirements along with the advancing of the stope working face. According to the method for retaining a gob-side tunnel, the retaining of the gob-side tunnel and the tunneling of the stope working face gateway are overall arranged, and the tunnel concrete pier column support is arranged; therefore, the side support intensity and support resistance of the retained tunnel are greatly enhanced, the influence of support pressure in two times of mining is effectively controlled. The method for retaining gob-side tunnel is particularly suitable for using in flexible mining faces of bottom plate and / or top plate.

Description

technical field [0001] The invention relates to a coal mine gob-side entry retention process, in particular to a gob-side entry retention method that arranges the mining face along the trough and the gob-side entry retention as a whole, and adopts concrete pouring support for the gob-side entry retention. Background technique [0002] In order to reduce the coal pillar loss between the coal mining section transportation and the track trough, no coal pillar mining is adopted, that is, the coal trough is reserved along the goaf to serve the mining face of the next section, which is called gob-side entry retention, also known abroad Reuse lanes. [0003] China's "Invention Patent Bulletin" discloses the invention application of the name: "Supporting method for retaining lanes along gob-side lanes", application number: 200710026096.9, publication number: CN 101117890A. Its purpose is to solve the support problem of gob-side entry retention; the measure is to install a filling f...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the disadvantages of the existing technology that the tunneling before mining and the roadway retention after mining are independent of each other without overall consideration, the requirements of the influence of two mining operations cannot be met, and the effect of roadway retention cannot reach expectations, the present invention provides A gob-side retaining method, which makes an overall arrangement for the gob-side retaining of the mining face and the gob-side retaining after mining during the excavation stage of the mining face, and considers the roadway that needs to be retained at the beginning of excavation. It can greatly improve the strength and support resistance of the support body beside the gob-side entry retaining, and meet the requirements of the influence of two mining operations; and avoid the mutual interference between the support of the gob-side retaining entry and the operation of the mining face

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