Drilling unit, method for slot drilling and slotting device

The technology of a drilling machine and impact device, which is applied to drilling equipment and methods, drill pipes, drill pipes, etc., can solve the problems of damage to the body and guide parts of the slotting device, and achieve the effect of long working life

Inactive Publication Date: 2011-02-23
SANDVIK MINING & CONSTR OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of the disclosed grooving device is that the stress wave generated by the percussion device of the drilling machine is transmitted not only to the tool but also to the body structure and the guide tube
Stress waves can cause severe damage to the body and guides of the slotting device

Method used

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  • Drilling unit, method for slot drilling and slotting device
  • Drilling unit, method for slot drilling and slotting device
  • Drilling unit, method for slot drilling and slotting device

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] Figure 1a is a schematic view of a rock drilling apparatus 1 comprising a boom 2 at the end of which there is a rock drilling unit 60 . exist Figure 1b A rock drilling unit 60 , shown in more detail in , comprises a feed beam 3 with a rock drilling machine 6 comprising a percussion device 4 and possibly a rotating device 5 . Typically, the percussion device 4 comprises a percussion piston operated by a pressure medium, and the percussion device 4 strikes the upper end of the tool 7 or a connection arranged between the tool 7 and the percussion device 4 , such as a drill shank 61 . Naturally, it is possible to generate the impact pulse in other ways in the impact device 4 , for example electrically or without a reciprocating impact piston. The proximal end of the tool 7 is connected to the rock drilling machine 6 by a shank 61 and at the distal end of the tool 7 there is a fixed or detachable drill bit 8 for breaking rock. Typically, the drill bit 8 is a drill bit wi...

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PUM

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Abstract

A slotting device (100) to be used with a rock drilling apparatus (1) to drill closely together a plurality of parallel intersecting holes so as to form a slot in a brittle material, such as rock, masonry or concrete. The slotting device (100) includes a guide portion (110) connected to a body portion (120) with at least one strut (130). The guide portion (110) is disposed in a previously drilled hole, and the body portion (120) and a rotary percussion tool (7) mutually define a variable volume chamber (140) that contains flushing fluid that damps transmission of impact stress waves from a percussion device (4) of the drilling apparatus (1) to the slotting device (100).

Description

technical field [0001] The invention relates to a drilling unit and a method for slot drilling and a slot drilling device. In the grooving process, multiple holes are drilled close together to form grooves in the rock material. Grooves may be formed in a rock surface or in a rock mass by drilling a plurality of holes in the surface at a pitch substantially equal to the diameter of the holes. During the notching process, a special notching device is required for guiding the drilling tool along the previously drilled hole. The objects of the invention are more closely disclosed in the preambles of the independent claims. Background technique [0002] Slotting is a method used in both underground and surface mining. During grooving, holes are drilled one after another very close to each other, and when new holes are drilled close to previously drilled holes, the rock wall between the holes is broken. In this way, a continuous slot is formed from the holes as the holes are s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/24E21B7/28E21C25/58
CPCE21C25/58E21B19/24
Inventor 毛努·门泰里
Owner SANDVIK MINING & CONSTR OY
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