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Gas pressure measurement borehole filling sealing material and using method thereof

A sealing material and gas pressure technology, which is applied in the direction of sealing/package, drilling composition, chemical instruments and methods, etc., can solve the problems of front-end plug sealing material, long drilling sealing length, low gas pressure, etc. problem, to achieve good application effect, strong coal seam applicability, and less usage

Active Publication Date: 2020-05-12
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual drilling sealing process, due to the long sealing length of the drilling hole and the serious water accumulation in the hole, it is difficult to send the front-end plug sealing materials such as ordinary bladders and kelp to the appropriate position, resulting in most of the gas pressure measurement drilling holes. It is difficult to truly realize the "two blockages and one injection" pressure seal, and there are serious problems such as gas leakage in drilling holes, and there are problems such as small and undetectable coal seam gas pressure, which greatly affects the prevention and control of coal seam gas disasters and coal bed methane drainage. scientific implementation of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The gas pressure measurement of the coal seam or the upward drilling hole through the seam or the gas pressure measurement of the drilling hole without water:

[0020] The mass percentage of each material is 90% of superabsorbent resin, 7% of composite cellulose ether, and 3% of polyacrylamide. Among them, the superabsorbent resin is selected from 5-10 mesh sodium polyacrylate, and the composite cellulose ether is made of hydroxypropyl methylcellulose. 70%, polyanionic cellulose 30%. Put the compound material above into the hydrophilic pouch, fix the hydrophilic pouch on the rear end of the gas pressure measuring flower tube, slowly send it into the target section, and carry out drilling and grouting for sealing.

Embodiment 2

[0022] Measurement of downward gas pressure in this coal seam and through long boreholes (large water content):

[0023] The mass percentage of each material is 93% of composite superabsorbent resin, 5% of composite cellulose ether, and 2% of polyacrylamide. 60%, 40 mesh sodium polyacrylate 20%, composite cellulose ether consists of 90% hydroxypropyl methylcellulose, 10% polyanionic cellulose. Put the compound material above into the hydrophilic pouch, fix the hydrophilic pouch on the rear end of the gas pressure measuring flower tube, slowly send it into the target section, and carry out drilling and grouting for sealing.

Embodiment 3

[0025] Downward gas pressure measurement of short boreholes through layers (little or no water content):

[0026] The mass percentage of each material is 90% composite superabsorbent resin, 7% composite cellulose ether, and 3% polyacrylamide. The composite superabsorbent resin consists of 50% of 5-10 mesh sodium polyacrylate, 10-25 mesh sodium polyacrylate 40%, 40 mesh sodium polyacrylate 10%, composite cellulose ether is composed of 60% hydroxypropyl methylcellulose, 40% polyanion cellulose. Put the compound material above into the hydrophilic pouch, fix the hydrophilic pouch on the rear end of the gas pressure measuring flower tube, slowly send it into the target section, and carry out drilling and grouting for sealing.

[0027] The hydrophilic pouches used in the above examples 1-3 are made of composite cotton material soaked with a hydrophilic surfactant solution with a mass percent concentration of 30-50% and dried.

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Abstract

The invention relates to a gas pressure measurement borehole filling sealing material and a using method thereof. The borehole filling sealing material is composed of 88-92% of composite super absorbent resin, 5-7% of composite cellulose ether and 3-5% of polyacrylamide. The using method of the material comprises the following steps: a dry material is placed in a hydrophilic bag, and the hydrophilic bag is fixed to the rear end of a gas pressure measuring floral tube, wherein the hydrophilic bag is made of a composite cotton material obtained after soaking in a 30-50% hydrophilic surfactant solution and drying. The gas pressure measurement borehole filling sealing material has good performance adjustability, drill hole condition adaptability and drill hole sealing performance, and can effectively solve the problems of sealing and pressure measurement pipe blockage in the grouting process of the gas pressure measurement drill holes with different lengths; and the material also has the characteristics of small usage amount, low cost, low labor intensity, safety, environmental protection and the like.

Description

technical field [0001] The invention relates to the field of gas pressure measurement boreholes in underground coal mines and other borehole sealing fields requiring deep grouting, in particular to a gas pressure measurement borehole filling sealing material and a method for using the sealing material. Background technique [0002] At present, there are more than 1,700 high gas and coal and gas outburst mines in my country, accounting for about one-third of the total number of mines. Coal seam gas pressure is one of the important characterization parameters of coal seam gas occurrence conditions, and one of the main bases for coal and gas outburst risk assessment, mine gas disaster prevention and gas drainage. Therefore, timely and accurate measurement of coal seam gas pressure is of great significance for high gas and coal and gas outburst mines. Borehole sealing is the key basis for the accuracy of coal seam gas pressure measurement, and reasonable borehole sealing techno...

Claims

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Application Information

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IPC IPC(8): C09K8/42C09K8/44E21B33/13
CPCC09K8/44C09K8/422E21B33/13
Inventor 郝晋伟舒龙勇霍中刚齐庆新李阳凡永鹏孙中学杨伟东
Owner CCTEG CHINA COAL RES INST
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