Supporting type temporary supporting method with telescopic top beams for tunneling face

Abstract

The invention discloses a supporting type temporary supporting method with telescopic top beams for a tunneling face. Temporary supporting brackets are adopted for realizing supporting and each comprise a four-column front bracket, a four-column rear bracket, two advancing jacks and a hydraulic system, the front parts of the two advancing jacks of each temporary supporting bracket are arranged in a base of the front bracket or the rear bracket, and therefore the rear frames can be close to the front frames when getting close to the front frames; when tunneling roadways need to be supported temporarily, two or more temporary supporting brackets are adopted for supporting, unsupported roofs can be remedied in the bracket moving process, and the safety of constructors is guaranteed; the supporting length is large, and the safety of the tunneling face can be effectively guaranteed through the sequential operation.

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; Hydraulic casing type telescopic f...

AI Technical Summary

Problems solved by technology

Since the two moving jacks are set between the bases of the front frame and the rear frame, the front frame and the rear frame cannot be completely close together, and they cannot be close to each other during the moving frame. There will be an empty top phenomenon within a certain period of time, which is harmful to the construction personnel. It is not safe; when a group of temporary support brackets are used, the support surfaces of the front frame and the rear frame are extremely small, the support effect is not good, and the safety is poor, which cannot effectively guarantee the safety of the excavation face and cannot be adapted to fully mechanized excavators. The need for fast and safe construction has resulted in a relatively low average monthly footage and tight mining continuity

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