A folding telescopic roadway hydraulic support

Abstract

The invention discloses a folding extension type roadway hydraulic bracket and an application method thereof. The bracket comprises a top beam, two angle beams, two side protection plates, two side supports and a base, wherein the two ends of the top beam are respectively hinged to the two angle beams; the other ends of the angle beams are hinged to the side protection plates; the side protection plates are hinged to the side supports; the bottoms of the side supports are spherically hinged to the base; rotating angles between the top beam and the angle beams pass through limit stoppers; wedge blocks for limiting inward rotation of the side protection plates are arranged at the hinged inner sides of the angle beams and the side protection plates; and a skid resisting device is arranged on the base. The shape of the bracket in the support state is accordant with the section of a roadway; when a top plate of the roadway is supported, the active support of two uppers is realized; the connection among all the components of the bracket is hinging; and the assembly, disassembly and transfer of the bracket are to fold and shrink a drop frame of a working bracket perpendicular to the direction of the roadway through an auxiliary bracket assembly / disassembly / transfer device, and the state is kept until a support area supported by the working bracket moves to the front side along the direction of the roadway, so that the front-support back-return recycling is realized.

Description

technical field [0001] The invention relates to a roadway temporary support hydraulic support for safe, efficient and rapid construction of underground engineering. Background technique [0002] The comprehensive mechanized excavation construction technology of underground engineering has been widely promoted and applied because of its safety and reliability, and its single-entry efficiency is much higher than the traditional blasting excavation technology. How to realize safe and efficient excavation, since the 1950s, domestic and foreign mining circles have carried out a lot of exploration, and produced a lot of technology and equipment. The main technical points involve two aspects, that is, the rapid implementation of safe and reliable temporary support and the parallel operation of roadheader cutting and permanent support. [0003] Temporary support is designed to prevent the surrounding rock from falling and collapsing and hurting people after excavation of the roadwa...

AI Technical Summary

Problems solved by technology

[0012] 1. The traditional temporary support requires manual laying and top-connecting of roofing materials when running forward, which is labor-intensive and unsafe to work under an empty roof. It has almost no support for the roof and can only play a limited role in protecting the workers. , it often appears that the on-site operators try to save trouble, are afraid of trouble, and do not use it

[0013] 2. The joist-type temporary support of the roadheader frame, the net laying operation is still under the empty roof, the support area cannot reach the full section, the strength of the frame and the connection strength with the roadheader are limited, and the support force is very small. Under temporary support and permanent support, the roadheader cannot work in parallel

Since the birth of the first-generation bolter in the 1960s, two changes have been made. The third generation of bolt-digging is integrated. Although the parallel operation of bolt-digging has been realized, the empty head distance of the bolt is large, generally more than 1.2-1.5 meters. , the support cannot keep up with the head, so it is only suitable for large-section rectangular or trapezoidal roadways with small mining depth, small mine pressure and good surrounding rock conditions. Therefore, it has not been widely promoted and applied.

For example, most of the mining areas in my country and Germany, Poland and other countries have deep mining depth, high mine pressure, soft and broken surrounding rocks, dense anchor rods, and even need hanging nets and anchor cables for support, and the support workload is heavy. Not only the empty top distance cannot meet the requirements, the support time is much longer than the cutting time, and it is difficult to synchronize with the cutting

[0015] 4. Front and rear push-pull or paired alternate stepping hydraulic self-moving support supports the roof repeatedly once in each cycle, which is easy to damage the roof and is not conducive to the support of the roof. When the condition of the roof is not good, it must be stopped for support, which cannot be realized Parallel operation of roadheader cutting and permanent support

This support method supports the head-to-head support of the roof through the entire length of the shield to the surrounding rock, shrinks, moves forward, and supports again. Repeated support is easy to damage the surrounding rock. It is only suitable for large bend radius and large sections. 1. Tunnel construction with better surrounding rock conditions is easy to get stuck when encountering faults and broken zones

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