Steel wire rope net rubber sprayed concrete supporting structure of deep roadway and construction method of steel wire rope net rubber sprayed concrete supporting structure

Abstract

A steel wire rope net rubber sprayed concrete supporting structure of a deep roadway comprises two pressure relief grooves and a steel wire rope net rubber concrete spraying layer, wherein the two pressure relief grooves are formed in two sides of a bottom plate of a roadway; the steel wire rope net rubber concrete spraying layer is sprayed to the surface of surrounding rock of the roadway and comprises a first rubber concrete layer and a second rubber concrete layer which are successively sprayed on the surface of deep surrounding rock of the roadway; and the first rubber concrete layer and the second rubber concrete layer are prepared by blending concrete in rubber particles. To sum up, the invention provides the construction method for an anchor rod, the steel wire rope net, rubber sprayed concrete and a deep soft rock roadway with grouted surrounding rock. The construction method is used for a deep soft rock roadway, particularly a rock roadway and an important chamber with long service life, the self-supporting ability of the surrounding rock of the deep soft rock roadway and the supporting property of an anchor network are improved, the labor intensity of workers is reduced, the roadway supporting and repairing cost is reduced, the economic benefit and the social benefit are high, and a construction technology for the deep soft rock roadway can further be standardized.

Description

technical field [0001] The invention belongs to the technical field of coal mine roadway support, and in particular relates to a deep roadway steel wire rope net rubber shotcrete support structure and a construction method thereof. Background technique [0002] The vast majority of coal mines in my country are underground coal mines, and a large number of rock roadways need to be excavated every year. With the continuous extension of coal mining depth, the surrounding rock of rock roadway is gradually transformed into deep soft rock. Due to the high stress of the surrounding rock in the deep soft rock roadway, poor lithology, low strength, and large deformation of the surrounding rock, the two sides of the roadway and the roof sink, and the bottom plate rises, causing serious deformation and damage to the roadway, and even repeated renovations many times. [0003] After excavating the rough section of the surrounding rock of the deep roadway, the newly exposed surrounding r...

AI Technical Summary

Problems solved by technology

However, steel fiber concrete is still a brittle material, and the application of steel fiber shotcrete support is limited when the anchor-mesh injection joint support is carried out in deep soft and expansive surrounding rocks with large deformation and poor self-stability.

[0006] (2) The metal mesh (reinforced mesh) of the existing anchor mesh support is difficult to be closely attached to the surrounding rock of the roadway, and the mesh of the metal mesh is too small, and the concrete sprayed The surrounding rock of the layer and the roadway is not dense or even separated from the layer, and the support performance of the deep soft rock bolt net is reduced

[0007] (3) The existing surrounding rock grouting anchors are generally processed from ordinary galvanized seamless steel pipes, and the grouting anchors have no pre-tightening force and anchoring force , it only plays the role of grouting reinforcement to the surrounding rock, and cannot achieve the performance of bolt anchorage. In fact, it is a grouted steel pipe

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