CN211038591U

CN211038591U - Tunnel excavation straight hole cut mold

Info

Publication number: CN211038591U
Application number: CN201922184220.5U
Authority: CN
Inventors: 梁猛; 段永维; 冯建明; 张琦; 赵伟
Original assignee: Jilin Tonggang Mining Industry Co ltd
Current assignee: Jilin Tonggang Mining Industry Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-07-17
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to a mine tunnel rock drilling blasting operation technical field, a tunnelling straight eye undercutting mould promptly. A roadway driving straight-hole cut die is characterized in that a steel plate with the thickness of 20mm is cut into a round steel plate with the diameter of 260mm, seven round holes with the diameter of 45mm are cut on the round steel plate, the seven round holes are arranged according to roadway cut holes, the hole distance is 29.7mm, and a section of steel pipe with the outer diameter of 43mm is welded on a vertical steel plate at a central hole. According to a mining and tunneling design manual or an optimal tunneling straight-hole cut specification calibrated on site, a straight-hole cut mold for roadway tunneling is manufactured, and the cut hole-to-eye distance is accurately controlled by using set drilling parameters and locking a drill rod hole opening, so that rocks are completely crushed to form an ideal slot cavity. The utilization coefficient of blast holes is improved, the tunneling unit cost and the labor intensity of lithographers are reduced, and the tunneling footage is comprehensively improved.

Description

Tunnel excavation straight hole cut mold

Technical Field

The utility model relates to a mine tunnel rock drilling blasting operation technical field, a tunnelling straight eye undercutting mould promptly.

Background

In the prior art, in the tunneling work of a roadway, the cutting hole has the effect that a second free surface is formed on the tunneling working surface, favorable conditions are created for blasting of other blast holes, and the quality of the cutting plays a decisive role in improving the rock breaking efficiency and the circulating footage. The straight-hole cut rock drilling operation is convenient, the straight-hole cut rock drilling operation can be used for medium-hard or hard rock stratums, the blast hole depth is slightly influenced by the size of an excavation section, the circular footage is improved by suitable drilling, blasting piles are relatively concentrated, and size control is facilitated. However, the straight-hole cutting and drilling technology has high requirements, the drilling workload is large, the requirements on the hole spacing, the charging and the like are strict, and if the operation is not proper, rock in the groove is not easy to throw or is solidified again, so that the utilization rate of the blast hole is reduced. In addition, when a lithographer digs the cut hole, another lithographer needs to hold the drill rod to control the hole distance of the cut hole, the operation time of the lithographer is occupied, and the labor efficiency is reduced. Aiming at the condition that the tunneling operation surface is uneven after rock blasting, the drilling difficulty is increased, and the hole distance is easily too large or too small, and aiming at the condition that some mines lack technical training or the training depth is not enough for rock chisels, a roadway tunneling straight-hole undermining mold is needed to be designed and manufactured to accurately control the hole distance of the grooving holes, so that an ideal groove cavity is formed, and rocks are completely crushed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the aforesaid not enough and design preparation low cost, convenient operation, adjustment parameter are easy, the accurate straight hole undercutting mould of tunnelling cloth accuse control.

The technical solution of the utility model is that: a roadway driving straight-hole cut die is characterized in that a steel plate with the thickness of 20mm is cut into a round steel plate with the diameter of 260mm, seven round holes with the diameter of 45mm are cut on the round steel plate, the seven round holes are arranged according to roadway cut holes, the hole distance is 29.7mm, and a section of steel pipe with the outer diameter (diameter) of 43mm is welded on the vertical steel plate at the central hole.

The utility model has the advantages that: according to a mining and tunneling design manual or through on-site calibration of an optimal tunneling straight-hole cut specification, a roadway tunneling straight-hole cut mold is manufactured and used, and the cut hole and hole distance is accurately controlled by using set drilling parameters and locking the position of a drill rod hole, so that rocks are completely crushed to form an ideal slot cavity. The utilization coefficient of blast holes is improved, the tunneling unit cost and the labor intensity of lithographers are reduced, and the tunneling footage is comprehensively improved.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of a round steel plate structure.

Detailed Description

Referring to fig. 1 and 2, the names of the components are as follows: the steel plate comprises a round steel plate 1, a round hole 2 and a steel pipe 3.

Referring to fig. 1 and 2, the preparation of the roadway tunneling straight-hole cut die comprises the following steps:

materials: a steel plate with the thickness of 20mm and a steel pipe with the diameter of 43 mm.

The processing method comprises the following steps: a steel plate with the thickness of 20mm is cut into a round steel plate 1 with the diameter of 260mm, seven round holes 2 with the diameter of 45mm are cut on the round steel plate 1 according to the size of the drawing, the seven round holes 2 are arranged according to roadway slotted holes, and the hole distance is 29.7 mm. The steel pipe 3 with the outer diameter (diameter) of 43mm is welded on the vertical steel plate at the central hole.

The working principle is as follows: referring to fig. 1, a lithographer drills a central hole of a cutting hole according to a design position, inserts a central steel pipe of a straight-hole cutting die into the central hole after the central hole is drilled to the design position, at the moment, the die is not fixed, digs a second cutting hole according to the position of an upper hole of the die (the die is not fixed), inserts the second cutting hole by utilizing a manufacturing hole pin fixing die (in actual operation, the lithographer can easily drill holes) to prevent dislocation of the cutting hole, and fixes the die at two points. After the die is fixed, other cutting holes are dug only by a lithographer according to the circular holes arranged on the die, and the die is pulled out after the digging is finished.

The undercutting mould can also be manufactured by selecting different design parameters according to different straight-hole undercutting and tunneling modes.

The above description is only exemplary of the present invention, and the various illustrations do not limit the essence of the present invention.

Claims

1. A roadway driving straight-hole cut die is characterized in that a steel plate with the thickness of 20mm is cut into a round steel plate (1) with the diameter of 260mm, seven round holes (2) with the diameter of 45mm are cut on the round steel plate (1), the seven round holes (2) are arranged according to roadway cut holes, the hole distance is 29.7mm, and a section of steel pipe (3) with the outer diameter of 43mm is welded on the vertical round steel plate (1) at the central hole.