Hydraulic support used for roadway temporary support and erecting and use method of hydraulic support

Abstract

The invention relates to a hydraulic support used for roadway temporary support and an erecting and use method of the hydraulic support. The hydraulic support comprises a top beam, an angle beam, a telescopic side support and an indeterminate balance oil cylinder. The support is erected at the front end of a temporary support area, always supports surrounding rocks extending to the rear end of the temporary support area after being erected like a band plate of a track which is static relative to the ground, then is folded and retracts from the rear end of the temporary support area, and moves to the front end of the temporary support area through an auxiliary facility so as to be erected and recycled. The support is simple in structure and strong in adaptability and improves drivaging efficiency.

Description

technical field [0001] The invention relates to a hydraulic support for underground engineering temporary support and its erection and use method; in particular, it is used for the temporary support of head-on excavation or the reinforced support of the advanced support pressure zone of the coal mining face. Background technique [0002] Support is required after the excavation of the underground project. In order to protect the surrounding rock from falling and collapsing during the support operation, temporary support must be provided first so that the operators can work under reliable support. [0003] There are mainly 6 types of temporary support methods for existing excavation roadways: [0004] 1. The traditional temporary support methods include suspension rings, steel pipes (or rails, section steel), etc., through the front channeling steel pipes, etc., plus roof protection materials, and single pillars with roof beams. [0005] 2. Rack-mounted joist roof protection...

AI Technical Summary

Problems solved by technology

[0011] 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

[0012] 2. The joist-type temporary support of the roadheader frame is still under the empty roof, and 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. The roadheader cannot work in parallel during support and permanent support

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.

Most mining areas in my country and Germany, Poland and other countries have deep mining depths, high mine pressure, soft and broken surrounding rocks, dense anchor rods, and even need hanging nets and anchor cables for support. 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

[0014] 4. The front and rear push-pull or paired alternate stepping hydraulic self-moving supports repeatedly support the roof once every excavation cycle, which is easy to damage the roof and is not conducive to the support of the roof. When the roof condition is not good, it must be stopped for support. Realize the parallel operation of roadheader cutting and permanent support

This support method supports the head-to-head support of the roof through the overall length of the shield to the surrounding rock, shrinks, moves forward, and supports again. The surrounding rock is repeatedly supported and easily damaged. It is only suitable for large turning radius, large section, Tunnel construction with good surrounding rock conditions is easy to get stuck when encountering faults and broken zones

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