Boom-type roadheader for tunnel construction and tunnel construction method

Abstract

The invention discloses a boom-type roadheader for tunnel construction and a tunnel construction method. The boom-type roadheader comprises an engine-driven body, a boom, a milling and excavating head and a water spraying and dust removing device, wherein the boom is connected to the engine-driven body in an extensible and/or swingable manner, and the milling and excavating head is mounted at the free end of the boom in a rotatable manner. The water spraying and dust removing device comprises a plurality of nozzles around the boom and adjacent to the milling and excavating head, and the nozzles are in non-uniform distribution in the circumferential direction. When the boom-type roadheader is used for excavating and milling the cross section of a tunnel, segments and segment strips are set for milling and excavation. When each strip of each segment is excavated and milled, and when the distribution density of the nozzles on the bottom right of the milling and excavating head is set to be higher than that of the nozzles in other regions, the milling and excavating head is driven by the boom to move from left to right; when the distribution density of the nozzles on the bottom left of the milling and excavating head is set to be higher than that of the nozzles in the other regions, the milling and excavating head is driven by the boom to move from right to left.

Description

technical field [0001] The invention relates to a tunnel construction method and equipment, in particular to a construction method for excavating a tunnel by combining mechanical equipment and controlled blasting technology and the equipment used. Background technique [0002] In the field of tunnel construction, blasting excavation is mostly used in hard rock tunnel construction. If it is in a complex environment, especially when passing through a city, there are often many buildings (structures) on the upper part of the tunnel that need to be protected, and the blasting vibration generated by the tunnel construction will have a great impact on the surrounding environment. Vibration-absorbing excavation technology must be used to ensure safe and rapid tunneling. [0003] At present, the construction methods of urban shallow railway tunnels mainly include the following: full-face tunnel boring machine method (TBM), hydraulic impact hammer method, splitting method, static bl...

AI Technical Summary

Problems solved by technology

The method of this invention has following shortcoming and deficiency: (1), it needs to use expensive tunnel boring machine (TBM) to excavate guide tunnel, makes construction cost very high; The upper wall of the guide tunnel is inclined upward to drill the inclined upper charge hole and charge the charge. This kind of construction in the guide tunnel with limited space has certain difficulties and potential safety hazards; (3), due to the use of tunnel boring machines (TBM), The flexibility of the tunnel construction process is reduced, and the entire construction process must be designed around the guide tunnel excavated by the tunnel boring machine (TBM)

However, the roadheader of this invention also has the following disadvantages to be improved: (1), although it is equipped with an internal and external spray dust suppression system, it divides the nozzle into a high-pressure nozzle and a low-pressure nozzle, which makes the structure complicated and must adopt two The set of water supply equipment supplies water for the high-pressure nozzle and the low-pressure nozzle respectively, which makes the equipment manufacturing cost relatively high; (2), the high-pressure nozzle and the low-pressure nozzle are all arranged evenly around the circumference, in other words, it does not take into account the rotation and movement of the cutting head Due to the difference in the amount of rock dust formed in the direction, all high-pressure nozzles / all low-pressure nozzles spray water mist at the same flow rate, so that the water mist in some areas may be insufficient, resulting in poor dust removal effect, while the water mist in some areas may be excessive. Cause water waste; (3), this invention does not enlighten or suggest how to control the movement mode of cutting head so that effectively reduce the condition that reduces dust and improve tunneling efficiency; (4), the roadheader of this invention has rock slag rolling / Splash to the operating room and endanger the safety of personnel and equipment; and (5), the dust removal air duct equipped with the roadheader of this invention only extends to the middle of the roadheader, and the dust removal effect is not obvious

Images