Pre-supporting combined unit suitable for soft rock tunneling

Abstract

A pre-supporting combined unit suitable for soft rock tunneling comprises a tail unit, a main unit, a cutting portion and a conveying device. A forepoling bar is arranged at the front end of the main unit. The pre-supporting combined unit is technically characterized in that the main unit comprises a main-unit main supporting set and a main-unit auxiliary supporting set which are staggered from rear to front, the main-unit main supporting set comprises a connecting plate I, a supporting oil cylinder I, a longitudinal beam I, a top beam I and a lateral supporting plate I, and the main-unit auxiliary supporting set comprises a connecting plate II, a supporting oil cylinder II, a longitudinal beam II and a top beam II; the tail unit comprises a tail-unit main supporting set and a tail-unit auxiliary supporting set which are staggered from rear to front, the tail-unit main supporting set comprises a connecting plate III, a supporting oil cylinder III, a longitudinal beam III, a top beam III and a lateral supporting plate II, and the tail-unit auxiliary supporting set comprises a connecting plate IV, a supporting oil cylinder IV, a longitudinal beam IV and a top beam IV. The problem that existing tunneling machines are poor in safety and difficult in back operation is solved fundamentally, and the pre-supporting combined unit has the advantages of low equipment wear and stability in moving.

Description

technical field [0001] The invention relates to the field of coal mine machinery, in particular to an advanced support type combined unit suitable for soft rock excavation. Background technique [0002] At present, for the tunneling of soft rock roadways, the cantilever type roadheader is mainly used to complete, and the main problems are as follows: the grounding pressure of the cantilever type roadheader is high, and when used in soft rock roadway, the roadheader is easy to sink into the weak connecting plate; When the cantilever roadheader cuts coal and rock, the load on the cutting head is large, and the vibration of the roadheader is large. In severe cases, it may even cause the body of the roadheader to yaw; The roof cannot be supported in a timely and effective manner. It is usually necessary to withdraw the roadheader and use special support equipment such as bolters to permanently support the roof, thus affecting the excavation efficiency. [0003] Existing compreh...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an advanced support type combination unit suitable for soft rock excavation, which fundamentally solves the problem of poor safety, narrow application range, difficult retreat operation, poor controllability, and problems in the excavation process of existing excavation machines. Easy to subside and other problems, it has the advantages of low equipment wear, stable travel, safe and reliable operation process, easy to control, etc.

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