Temporary support method of cross-supported longitudinal beams in excavation face

Abstract

The invention discloses a temporary support method of interlaced support type longitudinal beams in the excavation working face, which is realized by a temporary support support, and the temporary support support includes a four-column front frame and a four-column rear frame, a push jack and a hydraulic pressure system, the longitudinal beams of the front frame and the rear frame of the temporary support bracket are arranged alternately, and the longitudinal beams of the rear frame can penetrate into the longitudinal beams of the front frame when the rear frame is close to the front frame. The present invention adopts two or more than two sets of above-mentioned temporary support brackets for support during the temporary support of the excavation roadway, so they interfere with each other when supporting the roof, and can make up for part of the empty roof in the moving frame, plus telescopic With the function of the type front probe beam, there is no longer any empty roof phenomenon between each other, ensuring the safety of construction personnel.

Description

technical field [0001] The invention relates to the technology of temporary support for roadway excavation working face. Background technique [0002] At present, the temporary support forms used in the underground excavation working face include "wearing hat point column" support, front probing beam support and temporary support bracket. The closest technique to the present invention is the use of temporary support brackets. Chinese patent 201420137745.8 discloses a top beam telescopic excavation work face temporary support bracket, which includes a four-column front frame and a four-column rear frame, and two moving jacks are arranged between the front frame and the rear frame. Under the action, the front frame and the rear frame can move closer or farther away from each other; the main structures of the front frame and the rear frame are composed of four telescopic hydraulic columns, two bases, two beams and several longitudinal beams; The telescopic front probe beam; i...

AI Technical Summary

Problems solved by technology

Since the longitudinal beams of the front frame and the rear frame are arranged on the same axis, the front frame and the rear frame cannot be completely close together, and they cannot be close to each other during the moving frame. The roof interferes with each other, and the frames cannot be moved very close to each other. There will be an empty roof phenomenon within a certain period of time, which is unsafe for the construction personnel; Small size, poor support effect, poor safety, etc., cannot effectively guarantee the safety of the excavation face, and cannot meet the needs of fast and safe construction of fully mechanized excavators, resulting in a relatively low average monthly footage and tense excavation.

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