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Measuring device and method for initial velocity of gas gushing out from coal seam borehole

A gas gushing and measurement device technology, applied in the direction of measurement, drill pipe, drill pipe, etc., can solve the problems of difficult operation, safety threat, and influence on the accuracy of drilling gas, and achieve simple operation process, accurate and reliable measurement, avoid the effect of work

Active Publication Date: 2018-02-16
CCTEG SHENYANG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to implement on site. After the drilling is completed, the drill pipe is pulled out, sent to the hole sealer, and the hole is inflated with the pump to seal the hole. This operation process is often not completed within 2 minutes, which affects the initial gas gushing out of the drilling hole. The accuracy of speed measurement will affect the assessment of coal and gas outburst risks in the working face, which will bring safety hazards and threats to coal mine production

Method used

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  • Measuring device and method for initial velocity of gas gushing out from coal seam borehole
  • Measuring device and method for initial velocity of gas gushing out from coal seam borehole
  • Measuring device and method for initial velocity of gas gushing out from coal seam borehole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a coal seam drilling gas gushing initial velocity measuring device, mainly comprising a drill rod body 1 connected with a drill bit 15 with a pressure air outlet 16, characterized in that: wear-resistant capsule 3 is fixed on the drill rod body 1 by a wear-resistant capsule sleeve 2 , the wear-resistant capsule 3 on the drill pipe body 1 is provided with a through hole for sealing threads, and the sealing thread bolts fix the grouting pipe 4. The grouting pipe 4 is connected to the grouting pipe joint 6 through the grouting pipe bracket 5 with the ventilation hole 11 .

[0026] Wherein: the wear-resistant capsule sleeve 2 is withheld on the taper groove 7 of the drill pipe through the withholding groove 8 .

[0027] Wherein: the wear-resistant capsule 3 on the drill rod body 1 is provided with a through hole of a conical sealing thread 9 .

[0028] Among them, the wear-resistant capsule 3 is made of fla...

Embodiment 2

[0030] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a coal seam drilling gas gushing initial velocity measuring device, mainly comprising a drill rod body 1 connected with a drill bit 15 with a pressure air outlet 16, characterized in that: wear-resistant capsule 3 is fixed on the drill rod body 1 by a wear-resistant capsule sleeve 2 , the wear-resistant capsule 3 on the drill pipe body 1 is provided with a through hole for sealing threads, and the sealing thread bolts fix the grouting pipe 4. The grouting pipe 4 is connected to the grouting pipe joint 6 through the grouting pipe bracket 5 with the ventilation hole 11 .

[0031] Wherein: the wear-resistant capsule sleeve 2 is withheld on the taper groove 7 of the drill pipe through the withholding groove 8 .

[0032] Wherein: the wear-resistant capsule 3 on the drill rod body 1 is provided with a through hole of a conical sealing thread 9 .

[0033] Wherein: the 1 end of the drill rod body with the O-rin...

Embodiment 3

[0036] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a coal seam drilling gas gushing initial velocity measuring device, mainly comprising a drill rod body 1 connected with a drill bit 15 with a pressure air outlet 16, characterized in that: wear-resistant capsule 3 is fixed on the drill rod body 1 by a wear-resistant capsule sleeve 2 , the wear-resistant capsule 3 on the drill pipe body 1 is provided with a through hole for sealing threads, and the sealing thread bolts fix the grouting pipe 4. The grouting pipe 4 is connected to the grouting pipe joint 6 through the grouting pipe bracket 5 with the ventilation hole 11 .

[0037] Wherein: the wear-resistant capsule sleeve 2 is withheld on the taper groove 7 of the drill pipe through the withholding groove 8 .

[0038] Wherein: the wear-resistant capsule 3 on the drill rod body 1 is provided with a through hole of a conical sealing thread 9 .

[0039] Among them: the 1 end of the drill pipe body with the O...

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Abstract

The invention relates to a device and a method for measuring the initial velocity of gas emission from a borehole of a coal bed. The device mainly comprises a drill stem body connected with a drilling head with a pressing tuyere, and is characterized in that a wear-resistant capsule is fixed on the drill stem body by a wear-resistant capsule sleeve, a through hole of a sealing screw thread is formed in the wear-resistant capsule on the drill rod body, an grouting pipe is fixed by the sealing screw thread and a screw bolt, and the grouting pipe is connected with an grouting pipe connector through a grouting pipe support with a ventilation hole. Besides, the invention provides a method of the device. The wear-resistant capsule is fixed on the drill stem body by the wear-resistant capsule sleeve, so that the air tightness is guaranteed, and the wear-resistant capsule can bear the highest pressure 6 MPa; through the relative design of the grouting pipe, grouting for hole sealing are realized, and the effect is better; through the cooperation with the method, the repeated continuous measurement of the initial velocity of the gas emission from the borehole of the coal bed is realized, the initial velocity of gas emission from the borehole of the coal bed can be measured within 1.5 minutes, so that complicated work is avoided, the operating process is simple, and the measurement is more accurate and reliable.

Description

technical field [0001] The invention relates to a measuring device and a measuring method for the initial velocity of gas gushing out of a coal seam borehole, which are suitable for measuring the initial velocity of gas gushing out of a coal seam borehole in a coal mine. Background technique [0002] The initial velocity of gas gushing from boreholes is an important indicator used to predict the danger of coal and gas outburst or the effect of outburst prevention measures in the coal mine underground working face. , in the research process, a set of measurement operation methods and industry standards have been formed, see the coal industry standard of the People's Republic of China MT / T639-1996 "Determination of the initial velocity of drilling gas gushing", the specific operation method is to use electric coal drills or air The coal drill drives the auger rod, and drills a Φ42mm hole in the coal seam. After drilling 1m or drilling to a predetermined depth, the drill pipe i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B17/00E21B33/12E21B33/13
CPCE21B17/00E21B33/12E21B33/13E21B47/00
Inventor 张占存姜文忠秦玉金傅永帅邹永洺钟后选陈永涛刘文波
Owner CCTEG SHENYANG RES INST
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