Under-pressure self-moving excavation and support unit and under-pressure self-moving method

Abstract

The invention relates to an under-pressure self-moving excavation and support unit and an under-pressure self-moving method. The excavation and support unit comprises a supporting part, a tunneling part and a connecting part; and the supporting part is connected with the tunneling part by the connecting part. The supporting part comprises a top beam crossed sliding block, an under-pressure moving oil cylinder, a metal netting fixing frame and a base; at least two jumbolters, a hydraulic power system and an electric control system are installed on the base. The tunneling part comprises a shovel plate, a cutting stable oil cylinder, a front machine frame and a rear machine frame. A pin shaft fixed on a top beam can slide in a crossed sliding hole; and the under-pressure moving of the top beam can be realized under the promotion of the under-pressure moving oil cylinder. A top plate is not repeatedly supported during the moving process of the excavation and support unit, so that the surrounding rocks of a tunnel keep stable. During the under-pressure moving process of the top beam, the metal net roll hung at the tail end of the top beam can be automatically paved on the top plate of the tunnel. After the excavation and support unit moves to the proper position, the tunneling and rock bolting can operate in parallel so as to achieve the purposes of carrying out quick tunneling, reducing labor intensity and ensuring the safe production.

Description

technical field [0001] The invention belongs to the field of roadway equipment manufacture and application, and relates to a walking operation machine for roadway excavation and formation, in particular to an excavation unit capable of self-moving under pressure in a temporary support area during roadway excavation and formation, and a method for self-moving under pressure . Background technique [0002] At present, in China's excavation roadways, the roof occupation rate below medium stability is more than 60%. With the traditional bolt support method, the operator must work at the front end of the unsupported coal wall. When the roof falls off and the coal wall flakes occur Therefore, the more broken the roof, the greater the potential safety hazard. [0003] Existing tunneling equipment is used for the tunneling speed of the current fully-mechanized mining preparation roadway in coal mines. Generally, the tunneling speed is 300-400m / month. According to statistics, in a t...

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Problems solved by technology

[0004] At present, the reliability of the roadheader, the main equipment for roadway excavation in China, has been further improved, but only the mechanization of cutting and shipment has been solved, while the bolt support is used for drilling holes with electric coal drills in the unsupported empty roof area, and laying metal mesh. Completed by manual operation, low efficiency and potential safety hazards coexist

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