System and method for blocking bottom plate cracks through air-entrapping silicification

A floor and fissure technology, applied in earthwork drilling, sealing/packing, wellbore/well parts, etc., can solve the problem of incomplete plugging of tiny fissures, achieve better grouting effect, save equipment cost, and increase efficiency high effect

Active Publication Date: 2016-04-27
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of incomplete plugging of the above-mentioned fine cracks, the present invention proposes a system and method for sealing the cracks of the bottom plate by gas-entraining silicification. Promote application value

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  • System and method for blocking bottom plate cracks through air-entrapping silicification

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Embodiment 1

[0062] Taking the first recovery working face of a coal mine as an example, in the process of controlling the pressurized water of the bottom plate of the working face, the bottom plate of the coal mine working face is aerated and silicified to seal the cracks in the bottom plate:

[0063] The method for sealing the cracks in the bottom plate by gas-entraining silicification comprises the following steps:

[0064] [Step 1] Carry out fine detection of the hydrogeological conditions of the floor of the 1201 working face, determine that the floor of the working face is coarse sandstone, determine the grouting radius to be 1.5m, and the total grouting height to be 5.8m;

[0065] [Step 2] When the above-mentioned fine detection reaches the standard, grout the coal seam floor, specifically as figure 1 As shown, the sealing of the cracks in the water conduction damage zone of the bottom plate includes the following sub-steps:

[0066] (1) First place the drilling rig or tripod in th...

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Abstract

The invention discloses a system and method for blocking bottom plate cracks through air-entrapping silicification. The system comprises a sealing device, a water glass supply device, a carbon dioxide supply device and a cleaning device. The sealing device comprises a sealing ring and a flange. A main pipeline is vertically arranged at a drill hole. The part between the main pipeline and the drill hole wall are sealed through the sealing ring. Two branch pipelines including the first branch pipeline and the second branch pipeline are arranged on the top of the main pipeline, the first branch pipeline is connected with the water glass supply device, and the second branch pipeline and the carbon dioxide supply device are connected. The water glass supply device is used for supplying Na2SiO3, the carbon dioxide supply device is used for supplying CO2, and therefore crack blocking can be achieved. The cleaning device is used for washing water glass left after water crack blocking after locking is ended. By means of the system and method, the bottom plate fine cracks can be effectively blocked, confined water is prevented from entering a mine, and good application and popularization value is achieved.

Description

technical field [0001] The invention relates to the technical field of filling fissures in the bottom plate, in particular to a system and method for sealing the fissures in the bottom plate by gas-entraining silicification. Background technique [0002] With the continuous increase of coal mining depth, the mining conditions and geological conditions are becoming more and more complex. During the mining process of the working face, the problem of high pressure water is often encountered, which brings great difficulties to safe production and is prone to floor Water inrush accident. [0003] At present, researchers in this field usually solve the above-mentioned problems by means of deep-drawing and intensive drainage and mining under pressure. However, when sealing the cracks in the bottom plate, it is difficult for the grouting materials selected by general mines to inject into cracks with a width of less than 60um. When the cracks in the rock and soil reach 50um, water c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 刘伟韬王东辉张勤王建宁范龙
Owner SHANDONG UNIV OF SCI & TECH
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