Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for plugging air leakage and powder, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., and can solve the problems of affecting the transportation distance of powder materials, large resistance to powder material migration, and affecting the effect of sealing air leakage cracks, etc.
Active Publication Date: 2012-02-15
周福宝
View PDF2 Cites 12 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] Under the action of the positive pressure of the downhole compressed air system and the negative pressure of gas drainage, the above-mentioned powders have relatively high resistance to migration in the cracks, which affects the distance of powder transportation, has little water absorption, cannot fully expand, has poor viscosity and low hardness, and is easy to It is pumped into the gas drainage system, thus affecting the effect of sealing air leakage cracks
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach
[0012] The powder material of the present invention for plugging air-leakage cracks, its preferred embodiment is:
[0013] Contains the following components:
[0014] 20-25 parts by mass of bentonite, 30-35 parts by mass of talcum powder, 18-20 parts by mass of superabsorbent resin, 12-15 parts by mass of sodium alginate, and 10-15 parts by mass of anhydrous calcium sulfate, all components are mixed evenly.
[0015] The particle sizes of the bentonite, talcum powder, superabsorbent resin, sodium alginate and anhydrous calcium sulfate are all 140-200 mesh.
[0016] The water content of the bentonite, talcum powder, superabsorbent resin, sodium alginate and anhydrous calcium sulfate is 3-7%.
[0017] The purpose of the present invention is to seal the air-leakage fissures of the powder material, which is easy to move in the air-leakage fissures, and can effectively seal the air-leakage fissures in surrounding rocks of boreholes. Its beneficial effect is:
[0018] The powder c...
Embodiment 1
[0020] The following components are proportioned by mass percentage:
[0021] Bentonite 25%, talcum powder 35%, superabsorbent resin 20%, sodium alginate 10%, anhydrous calcium sulfate 10%, bentonite, talc powder, superabsorbent resin, sodium alginate and anhydrous calcium sulfate have a particle size of 140 mesh , these substances can be used after mixing according to mass percentage.
Embodiment 2
[0023] The following components are proportioned by mass percentage:
[0024] Bentonite 23%, talcum powder 32%, superabsorbent resin 19%, sodium alginate 14%, anhydrous calcium sulfate 12%, bentonite, talc powder, superabsorbent resin, sodium alginate and anhydrous calcium sulfate have a particle size of 170 mesh , these substances can be used after mixing according to mass percentage.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
particle size
aaaaa
aaaaa
particle size (mesh)
aaaaa
aaaaa
particle size (mesh)
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a powder for plugging an air leaking crack. The powder comprises, by mass, 20 to 25 parts of bentonite, 30 to 35 parts of talcum powder, 18 to 20 parts of a super absorbent resin, 12 to 15 parts of sodium alginate and 10 to 15 parts of anhydrous calcium sulfate, and all the above-mentioned components are directly mixed for utilization. The powder is especially applicable to plugging of air leaking cracks in underground coal mines caused by drilling in the process of gas extraction. According to the invention, under the action of positive pressure from a compressed air system and negative pressure from gas extraction, lubricity of talcum powder enables the powder to be transported to a deep crack; when transportation of the powder is stopped, bentonite and the superabsorbent resin absorb water and swell, sodium alginate powder becomes wet when meeting water, hydration of the sodium alginate powder enables the surface of the sodium alginate powder to have viscosity, the sodium alginate powder enables all the components of the powder to bond together to form aggregate and to adhere to crack walls, the powder continues to swell after anhydrous calcium sulfate absorbs water, and anhydrous calcium sulfate turns into hard gypsum at the same time, which enables the hardness of the powder aggregate to be increased and the powder aggregate to firmly plug the crack. All the materials used in the invention are common material on the market, which enables a low cost to be obtained.
Description
technical field [0001] The invention relates to a material for sealing air-leakage fissures in surrounding rocks of drilling holes for gas drainage in coal mines, in particular to a powder material for sealing air-leakage fissures. Background technique [0002] Gas disaster is one of the main natural disasters in coal mines. Draining gas through boreholes is an important means of controlling gas disasters in coal mines. However, with the continuous development of gas drainage, cracks in the surrounding rocks of boreholes begin to develop, expand, and communicate, which will eventually cause The air in the roadway is easy to enter the drainage borehole from these air leakage cracks under the action of the negative pressure of drainage, resulting in a decrease in the concentration of gas drainage, shortening the effective drainage life of the drainage borehole, and reducing the utilization rate of the borehole . [0003] In the prior art, in order to solve the technical probl...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more