Mining support having double pressure indicating function

Abstract

The invention discloses a mining support having a double pressure indicating function. The mining support comprises supporting rods, wherein mounting semi-grooves are formed in the tops of the supporting rods, and arc-shaped plates are installed in the mounting semi-grooves. The bottoms of T-shaped slide block parts are mounted into the mounting semi-grooves. Each T-shaped slide block part is sequentially provided with a contact part, a connecting part, a straight T-shaped block part and a bent T-shaped block part from bottom to top. A first mounting groove and a jacking hole are formed in each bent T-shaped block part, jacking blocks are mounted in the first mounting grooves, and second bolts penetrate through the jacking holes to fix the jacking blocks in the first mounting grooves. The bent T-shaped block parts are mounted in the T-shaped slide grooves formed in a supporting frame. A fixing groove is formed in the supporting frame, a water guiding groove is formed in the bottom of the fixing groove, and water storage parts are further arranged at two ends of the supporting frame. A water pipe penetrates through the supporting frame to be communicated with the water guiding groove. A mesh plate and a water guiding strip are arranged in the water guiding groove. An expansion strip is mounted in the fixing groove. A sealing cover is further arranged outside the fixing groove. Indicating grooves are formed in the side walls of the mounting semi-grooves, and indicating pins of the indicating parts penetrate through the indicating grooves to be connected with the T-shaped slide block parts.

Description

technical field [0001] The invention relates to a novel support for coal mine roadway support, in particular to a mine support with double pressure indication. Background technique [0002] In mine roadway support, mining brackets can be seen everywhere. At present, U-shaped steel brackets are mainly used. This kind of steel bracket has high tensile strength and compressive strength, and has good toughness, high support force, and high support strength. It can be used many times and is widely used in mine roadways, especially in deep complex roadways and soft coal seam roadways. [0003] But the installation method of this support is very troublesome. Generally, it needs to be placed in the middle, and then the overlapping length of section a and section b is controlled, and the spacing and quantity of the brackets are controlled. This method directly reduces the efficiency of the support project. Moreover, due to the different shapes of the top of the roadway, when using t...

AI Technical Summary

Problems solved by technology

First of all, it is impossible to inflate the airtight layer with an air compressor at any time during construction; secondly, the airtight layer is inflated to support the roof. The sealing material of the dense layer must be very expensive, and its cost and feasibility are poor; the last rubber layer has no protective layer outside, and it must be known that there are various hard and sharp objects in the downhole, especially on the top plate. If the rubber layer is not protected, the rubber layer may rupture within a few days under high pressure. Once the rubber layer is ruptured, the airtight layer will leak, which will seriously affect the support effect of the bracket, and even cause the bracket to lose its support. effect, it is very unsafe

[0006] In addition, the existing mine supports cannot directly observe the change of the pressure at the top of the roadway. Generally, as the roadway deepens, the pressure exerted by the roof of the roadway on the support will become larger and larger, because the existing supports cannot directly reflect the roof pressure. Generally, you will not really notice until the bracket is deformed, which is very dangerous, because when the bracket deforms, it may cause landslides, slag, etc. due to insufficient support.

Especially when the roadway support design does not provide enough support design, because there is no direct detection and display of roof pressure, it is easy to cause safety accidents

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