Coupling supporting structure based on high-constant-resistance mechanical single supports and construction method

Abstract

The invention discloses a coupling supporting structure based on high-constant-resistance mechanical single supports and a construction method. The coupling supporting structure structurally comprisesthe high-constant-resistance mechanical single supports, inter-support tie rods, anchor rods, anchor cables and concrete spray layers. A construction process comprises the steps that firstly, a roadway is excavated according to the design requirements of the roadway, a 50-100mm thick concrete spray layer is uniformly sprayed on the cross section of the roadway, and a surrounding rock of the roadway is strengthened by an anchor rod cable supporting method; then the high-constant-resistance mechanical single supports and the inter-support tie rods are installed; and finally, a 30-50mm thick concrete spray layer is re-sprayed to form the coupling supporting structure based on the high-constant-resistance mechanical single supports. The supporting structure has the characteristics of high self-bearing capacity, good integrity, self-adaption of coordination and deformation with the surrounding rock, good effect and the like, the corresponding construction method is simple and efficient, and significant effect on the surrounding rock control of a soft rock roadway and popularization and application value are achieved.

Description

technical field [0001] The invention relates to the technical field of soft rock roadway support, in particular to a high constant resistance mechanical single support coupling support structure and a construction method for large deformation soft rock roadway support in underground mining or rock engineering. Background technique [0002] With the depletion of shallow coal resources in my country, coal mining gradually extends to the deep at a rate of 10-12m per year, and the deep roadways are mostly characterized by soft rock roadways. The support problem of soft rock roadways has become a problem that plagues the safe and efficient production of coal enterprises. big problem. [0003] At present, for soft rock roadways, the main support technologies used are anchor shotcrete support technology, anchor mesh spray support technology, prestressed anchor cable support technology, steel frame shed support technology, pressure relief support technology, steel bar Concrete suppo...

AI Technical Summary

Problems solved by technology

Among these support technologies, active support such as bolts can only be used in the rupture zone and plastic zone of the surrounding rock, and it is difficult to play the role of suspension bearing; the cost of passive support such as steel frame shed is high, and the input-output The ratio is unreasonable, the stability is poor, and the construction speed is slow

The support strength of the flexible support structure is small, which cannot effectively control the continuous deformation of the roadway; the support range of the rigid support structure is small, and it is difficult to form an overall rigid support

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