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A simulation test platform and test method for rotary spray curing and sealing holes

A simulation test and hole sealing technology, which is used in earth-moving drilling, sealing/isolation, wellbore/well components, etc. It can solve the problems of borehole sealing experiment without gas drainage, and the test cannot be completed with high quality and quantity.

Active Publication Date: 2018-10-16
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the deficiency of the current sealing technology, technical innovation is needed, and the investigations on the sealing performance of gas drainage drilling are basically carried out underground. Due to the limitation of underground conditions, many tests cannot be completed with guaranteed quality and quantity.
The existing ground borehole sealing test is only to seal a pipe similar to a borehole, which is quite different from the actual borehole with a large number of cracks formed after drilling. At present, there is no one specially used to simulate the gas drainage borehole Apparatus and method for sealing experiment

Method used

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  • A simulation test platform and test method for rotary spray curing and sealing holes
  • A simulation test platform and test method for rotary spray curing and sealing holes
  • A simulation test platform and test method for rotary spray curing and sealing holes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: according to the appended figure 1 After the simulation platform is built as shown, open the cover plate of the coal / rock mass fixed platform 1, mix the screened coal (rock) powder, water and other ingredients evenly, pour them into the coal / rock mass fixed platform 1, and close the cover and tighten the nuts between the plates to solidify the test block; when the test block is solidified and formed, open the left baffle of the coal / rock mass fixing table 1, and use the rotary jet drilling machine I to construct a drill in the test block. Hole 13, during the retraction process of drill pipe 3, the nozzle 4 on the drill pipe 3 spins out the sealing slurry, which is evenly sprayed on the inner wall of the drill hole 13 to form a sealing layer 14, and the slurry penetrates into the surrounding cracks / pores and solidified, isolated the connection between the borehole 13 and the surrounding cracks / pores; according to the attached image 3As shown, use sealant ...

Embodiment 2

[0039] Embodiment 2: according to the appended figure 1 After the simulation platform is built as shown, open the cover plate of the coal / rock mass fixed platform 1, mix the screened coal (rock) powder, water and other ingredients evenly, pour them into the coal / rock mass fixed platform 1, and close the cover plate and tighten the nuts between the plates to make the test block solidify and form; when the test block is solidified and formed, open the cover plate of the coal / rock mass fixing platform 1 again, and cover the steel pressure plate with the same size as the cover plate on the The upper surface of the test block, and the entire coal / rock mass fixing platform is placed under the pressure testing machine to simulate the hole formation and sealing conditions under different stress (corresponding to the burial depth of coal rock), and the subsequent operation steps are the same as in the embodiment 1.

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Abstract

The invention discloses a rotary-jet-grouting solidifying hole sealing simulation test platform and a test method. The test platform is mainly composed of a coal / rock mass fixing table, a rotary-jet-grouting drilling machine, a high-pressure grouting pump, a slurry stirring device, a sealing-effect inspecting device and the like. The test method includes the steps that screened coal / rock powder, water and other preparing materials are mixed to be even to be poured into the coal / rock mass fixing table; after a test block is solidified and molded, a drill hole is constructed in the test block through the rotary-jet-grouting drilling machine; in the process of drawing back a drilling rod, sealing slurry is subjected to rotary jet grouting while lifting the drilling rod, the sealing slurry is evenly sprayed to the inner wall of the drill hole and forms a sealing layer, the slurry permeates into fractures / gaps in the periphery and is solidified, and communication between the drill hole and the fractures / gaps in the periphery is isolated. In order to obtain the optimal sealing effect, the parameters of the devices and the ratio of the slurry need to be adjusted, and testing is repeated. The effect is tested through the specially-made inspecting device, and the tested result is of important practical significance in selection of the lifting speed, the rotating speed, the rotary-jet-grouting pressure, the rotary-jet-grouting flow and the ratio of the slurry.

Description

technical field [0001] The invention relates to a test platform and a test method, in particular to a simulation test platform and a test method for a rotary spraying curing hole sealing simulation test platform and a test method suitable for drilling and sealing holes in underground gas drainage in coal mines. Background technique [0002] There are many methods for the study of gas drainage drilling and sealing, such as theoretical analysis, numerical simulation, etc., and the test method is also a very important scientific method. For high gas or outburst mines, gas drainage must be carried out first, that is, through Drilling is used to extract the gas in the coal seam or goaf by drilling. Aiming at the deficiency of the current hole sealing technology, technical innovation is needed, and the investigation of the sealing performance of the gas drainage borehole is basically carried out in the downhole. Due to the limitation of the downhole conditions, many tests cannot b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/117E21B33/13
CPCE21B33/13E21B47/117
Inventor 林柏泉宋吴兵郝志勇孙炜浩万元李博洋
Owner CHINA UNIV OF MINING & TECH
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