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Coal mine underground grouting drill rod and using method

A technology for drill pipes and coal mines, which is applied in the direction of drill pipes, drill pipes, mining equipment, etc., and can solve problems such as increasing the workload of grouting filling, blocking holes, and affecting the penetration of grouting pipes into boreholes, etc.

Inactive Publication Date: 2021-07-30
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of pulling out the drill pipe, the broken rock mass or the collapsed gangue will collapse and move under the influence of the disturbance, which will block the hole and affect the penetration of the grouting pipe into the drill hole
At the same time, the operation of drilling the pipe first and then the grouting pipe increases the workload of grouting filling, making the grouting work cumbersome and complicated

Method used

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  • Coal mine underground grouting drill rod and using method
  • Coal mine underground grouting drill rod and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] see figure 1 and 2 , an underground coal mine grouting drill pipe, the device is mainly composed of a drill pipe body 1, a one-way switch 2, a rotary connector 3, a shield 4, a drill bit 5 and other components. The drill pipe body 1 is designed to have a diameter of 5-10 cm according to the actual situation of the filling site, and is made of steel material. A high-strength drill bit 5 is welded at the end of the drill rod, and the drill bit 5 is made of a metal material with higher hardness, which is enough to drill through rocks of general hardness. The size of drill bit 5 is generally greater than the maximum height when one-way switch 2 is fully opened 1-2cm, so that when drill bit 5 drills rock mass holes, give one-way switch 2 sufficient opening and closing space. The one-way switch 2 is made of two halves of arc-shaped hard steel sheets. According to the geological conditions of the grouting site, its length is designed to be 3-5cm, the protruding height is des...

Embodiment 2

[0017] A coal mine underground grouting drill pipe. The specific use method of the device is as follows: step 1, connect the drill pipe body 1 to the drilling rig, align the drill bit with the grouting site, start the drilling rig, rotate the drill Drill into the grouting site; step 2, stop drilling after the drill pipe is drilled into the grouting area to a suitable length, start the grouting work, start the filling pump, pump the slurry into the drill pipe body 1 and push the slurry Flow to the drill bit 5; step 3, when the slurry reaches the position of the drill bit 5 at the front end of the drill pipe, the one-way switch 2 opens outward under the huge pressure of the slurry, and the slurry flows from the opening of the one-way switch 2 Injection outwards, start to fill the broken rock mass or gangue; step 4, when the slurry pressure in the drill pipe body 1 increases and the slurry consumption speed slows down, reduce the pumping pressure, rotate backwards and retract For...

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Abstract

The invention discloses a coal mine underground grouting drill rod and a using method in order to reduce the disturbance to broken rock and gangue in the process of pulling out a drill rod in the grouting and filling work of a drill rod first and a grouting pipe later, effectively solve the problem of hole blockage, facilitate underground grouting operation, and reduce grouting and filling procedures. The drill rod is mainly composed of a drill rod body, a one-way opening and closing device, a rotary connector, a protective cover, a drill bit and other members. The rotary connector is connected with the one-way opening and closing device and the drill rod body so that the one-way opening and closing device can be opened and closed; a small spring is arranged in the rotary connector so that the one-way opening and closing device can be always in a closed state in a natural state and a drilling process; and meanwhile the protective cover guarantees a movable space for rotary opening and closing of the one-way opening and closing device. The coal mine underground grouting drill rod is simple in structure and convenient to operate, drilling and grouting filling can be carried out while drilling is carried out in a broken top plate or caving the gangue, the tedious working procedures of two-time operation of arranging the drill rod and a grouting pipe are reduced, the hole blocking problem is effectively solved, and underground grouting operation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of green mining in the coal industry, in particular to the field of coal mine grouting filling. Background technique [0002] In the process of coal mine mining or excavation, the geological conditions of broken roof are often encountered. The general solution is to use grouting reinforcement technology to strengthen the broken roof zone by grouting the broken zone of the roof. In underground gangue solid filling gobside entry retaining project or goaf overlying rock caving area grouting filling project, the grouting pipeline is often used to grout the gangue filling roadside body or the collapsing gangue in the caving area Reinforces, fills the gaps between filler materials. In the actual grouting filling project, the broken roof or the collapsed gangue is often drilled with a drill pipe first, and then the drill pipe is pulled out and then drilled into the grouting pipe for high-pressure grouting filling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00E21B17/00
CPCE21B17/00E21F15/00
Inventor 赵新元杨科何祥魏祯张继强
Owner ANHUI UNIV OF SCI & TECH
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