Roadside supporting method through high-water packing props

Abstract

The invention provides a roadside supporting method through high-water packing props and relates to the technical field of mine supports. The roadside supporting method comprises the steps of communicating prop bodies through a communication device, and arranging connecting rods to strengthen the stability between the prop bodies; and injecting a high-water material into cylinder blocks through three-purpose valves of the props to enable the high-water material to go into the connected prop bodies through the communicating device until movable prop bodies of the prop bodies rise to top plates.The high-water material comprises a material A and a material B at the weight ratio of 1:1; the material A comprises sulphoaluminate cement clinker, a suspending agent and a super-retarding agent; the material B comprises lime, plaster, a suspending agent and a composite quick-setting early strengthening agent; and after solidification, the volume of the high-water material slightly increases, and a supporting working face is fixed at the height of the prop bodies. The high-water filling props are used for permanent supporting of a roadway and roadside supporting of a gob-side entry, can alsobe used for replacing timber cribs, single hydraulic props and concrete props and is simple in construction process, convenient to operate, low in cost and beneficial to environmental protection.

Description

technical field [0001] The invention relates to the technical field of mine support, in particular to a roadside support method for high-water filling pillars. Background technique [0002] Coal mines are mainly mined underground, and a large number of tunnels need to be dug underground. Using tunnel support to keep the tunnel smooth and the surrounding rock stable is of great significance to the construction and production of coal mines. The effect of roadway support not only depends on the supporting force of the support itself, but also depends on the nature of the surrounding rock, the mechanical properties of the support, the installation density of the support, the time of installing the support, the quality of the support and the contact method with the surrounding rock, etc. The influence of a series of factors. The single hydraulic prop is a support equipment with good effect. It can be used together with the metal hinged top beam to support the top plate and the e...

AI Technical Summary

Problems solved by technology

Local scratches and deformation of hydraulic props are common problems of single hydraulic props, especially problems such as deformation and leakage of piston ports, corrosion of downhole hydraulic props, etc., resulting in insufficient service life of single hydraulic props

[0003] In underground construction projects, in addition to temporary support, permanent support is also required in many places. For example, permanent support must be used for the main shaft and transportation lane in the mine, and masonry support and arch support can be used. , bolt support, joint support, etc.; since the service life and strength of conventional hydraulic supports cannot meet the needs of permanent support, it is necessary to increase the strength and life of existing supports

Gobside retaining is to maintain the original mining roadway along the edge of the goaf behind the coal mining face. In order to recover the protective coal pillars left in the traditional mining method, the tunnel re-support of the previous section is reserved for the next section. However, the common pillars in the gob-side entry retaining need to be supported by dense supports. The gob-side entryway is at the back of the mining face, and the mine pressure in the coal behind the working face is a function of space and time, and there is a stress Peak area; the single hydraulic support will leak when the pressure exceeds its bearing limit, and the leakage of the emulsion will easily lead to the pollution of the underground environment

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