CN110792472B - Device and method for mixing and adding chemical reagent into paste filling slurry - Google Patents

Device and method for mixing and adding chemical reagent into paste filling slurry Download PDF

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Publication number
CN110792472B
CN110792472B CN201911065310.0A CN201911065310A CN110792472B CN 110792472 B CN110792472 B CN 110792472B CN 201911065310 A CN201911065310 A CN 201911065310A CN 110792472 B CN110792472 B CN 110792472B
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chemical reagent
pipeline
slurry
chemical
mixing
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CN110792472A (en
Inventor
辛林
张新国
李剑
徐敏
李超
韩立民
安明煜
冯洺泽
李凯旋
张士川
赵金海
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/08Filling-up hydraulically or pneumatically

Abstract

The invention discloses a device and a method for mixing and adding chemical reagents into paste filling slurry, wherein the device comprises a slurry conveying pipeline, a chemical reagent mixing pipeline, a chemical reagent injection hole and a cylindrical chemical reagent injection pipe. The existing slurry adding pipeline and the chemical agent adding pipeline are combined, and the chemical agent and the accelerator are added into the slurry and the paste are fully mixed at the same time. The method is simple and convenient to operate, facilitates adding of chemical reagents into the paste, increases the mixing efficiency of paste materials, and is low in cost and good in mixing effect.

Description

Device and method for mixing and adding chemical reagent into paste filling slurry
Technical Field
The invention relates to the field of mining processes, and particularly discloses a device and a method for mixing and adding a chemical reagent into paste filling slurry.
Background
At present, in the field of coal mines, the mineral exploitation technology of China reaches the advanced level of the same field in the world. Among various coal mining methods adopted in China, the filling mining method becomes one of the most basic methods in mineral exploitation, and has very important function in the field of mineral resources in China. The filling mining method is a mining method for filling a goaf with filling materials in the mining operation process. The filling aims to support the upper roof and the rocks on two sides of the goaf, prevent the situation of surface subsidence in the continuous mining process and protect mineral resources with higher relative value. The method can provide a safer working environment for mining workers, reduces the work amount of mining, cutting and other operations, and improves the safety and reliability of mining work.
The paste filling technology in the filling technology is widely applied to various large coal mines due to the characteristics of low cost and wide filling range, mainly aims at filling a goaf and an caving area, fully utilizes the movement rules of coal bed layered rocks and overlying strata, and can effectively control the collapse of a roadway roof and the ground surface. The invention provides a device and a method for mixing and adding chemical reagents into paste filling slurry in combination with the latest mine filling technology development.
At present, the paste filling coal mining technology is widely applied to all large mines at home and abroad. The earliest underground application of the paste coal mining technology is that in 1930, a dry filling test using mining tailings as filling materials is adopted by Haemon for the first time, and the application of a dry filling method in mine exploitation is successfully promoted. Subsequently in 1969, a technique for filling cement-bonded water sand using cement-bonded fillers as the material was developed in australia, which again promoted the development of the filling technique. After the 70 s, the German company firstly proposed the concept of the paste topic filling technology, and the technology is researched and tried on the lead-zinc mine in Germany, and is widely applied to the subsequent filling mining. By 1992, the Sudbary area mine in Canada also introduced paste filling technology into the daily mining operations. China also started using the technology very early, and in the 70 s of the 20 th century, China turns to using a more efficient fine sand cemented filling technology by referring to the optimization of Australia on the water sand filling technology. Since the paste filling technology has the characteristics of high strength of a filling body, low filling cost, easiness in filling and the like, after 1990, the first paste filling station in China is established by learning the filling experience of Germany, which indicates that the paste filling technology in China is a new stage, and then the paste filling technology is mainly applied to Jinchuan nonferrous metal companies, Wushan copper mines, Dayu nonferrous metal companies and Huizziqin lead-zinc ores.
In filling paste, chemical agents such as retarders and the like are added in the paste preparation process to delay solidification of paste materials, but in some special cases or in order to meet some special requirements, such as filling in a roadway, a goaf, a caving zone and other areas, the filling materials are required to be solidified quickly after being filled in place. Therefore, in these cases, a chemical agent added with an accelerator is generally used for achieving the purpose, but the addition of the accelerator at any place is a key problem, if the accelerator is added at a stirring station, the paste body can be rapidly solidified, pipeline blockage is likely to occur, in order to prevent the pipeline blockage, a retarder needs to be added into the filling paste body, the cost is undoubtedly increased, the risk that the paste body is remained in the pipeline is caused, and the difficulty in cleaning the pipeline is increased. Therefore, the addition and mixing of the accelerating agent at the end portion of the paste filling pipe are required, and the device has been proposed.
Chinese patent CN101749047A discloses a paste filling simulation test system, which is characterized by comprising an aggregate feeding part, an auxiliary material feeding part, a paste preparing stirring part and a paste conveying and filling part. The paste filling system comprises an aggregate feeding part, an auxiliary material feeding part, a stirring part, a paste conveying and filling part, a paste filling simulation frame and a paste filling simulation frame. However, the system has high cost, needs a plurality of devices to be connected with the system, has high operation difficulty, more designed systems and devices and needs professional personnel training; in addition, the system also needs to add a chemical reagent to prepare the paste firstly and then transport the paste, so that the paste cannot be solidified in time, and meanwhile, the paste is easy to stay in a pipeline to cause blockage and is inconvenient to clean.
CN108661703A discloses a coal mining full potential energy end pipeline transportation paste filling system and method, the system includes: the system comprises a pulping device, a gangue supply device, a slurry conveying pipe and a filling pipe, wherein the filling pipe can mix slurry and gangue in the filling pipe and guide the slurry and the gangue to a branch roadway to be filled. The full-potential tail end pipeline conveying paste filling system and method for coal mining fully utilize filling materials with wide sources, such as gangue, cement, fly ash and the like, and adopt pipeline filling at a position close to a working face. Also, the device has more facilities and is inconvenient to operate; if the time for adding the chemical reagent is too early, the solidification time of the paste is not easy to control, and the effect of the prepared paste is poor; and the whole system occupies a large space, has various steps, relates to a long flow, is easy to cause slurry to be detained in the transportation process, and is inconvenient to clean.
In view of the defects, the production device and the production method are urgently needed in the industry at present, the chemical reagent can be conveniently added, the chemical reagent can be uniformly scattered, the paste and the chemical reagent in the paste can be fully mixed, the mixing efficiency is high, the device is simple to operate, the implementation is easy, the cost is low, the paste is not easy to block in a pipeline, and the accumulated paste filling paste mixed additive is not easy to remain in the device.
Disclosure of Invention
Based on the analysis, the invention provides the production device and the production method which are convenient for adding the chemical reagent, simultaneously enable the chemical reagent to be uniformly scattered, enable the slurry in the paste to be fully mixed with the chemical reagent, have high mixing efficiency, simple device operation, easy realization and lower cost, lead the paste not to be easily blocked in the pipeline and lead the accumulated paste filling slurry mixed additive not to be easily remained in the device. The invention is realized by the following method:
a device for adding chemical reagent is mixed to lotion filling paste, includes
A slurry delivery conduit;
the chemical reagent conveying pipelines are uniformly distributed on the outer side of the slurry conveying pipeline and are axially fixed on the outer side of the slurry conveying pipeline;
the annular chemical reagent mixing pipeline is fixedly connected to the outlet end of the slurry conveying pipeline and is communicated with the end part of the chemical reagent conveying pipeline; and
and the chemical reagent spraying pipeline is fixedly connected to the inner side of the chemical reagent mixing pipeline.
Further, the chemical agent injection pipeline comprises a cylindrical chemical agent injection pipe and a plurality of chemical agent injection pipelines,
several chemical reagent sprays pipeline one end fixed connection in cylindrical chemical reagent injection pipe, and the other end uses cylindrical chemical reagent injection pipe to radially outwards extend and fixed connection in chemical reagent hybrid tube as the center, several chemical reagent sprays the pipeline and evenly arranges, and chemical reagent hybrid tube (3), chemical reagent injection pipeline (4) and cylindrical chemical reagent injection pipe (6) communicate each other.
Further, the chemical agent injection pipeline comprises three chemical agent injection pipelines.
Furthermore, chemical reagent injection holes are uniformly distributed on the front surface of the chemical reagent injection pipeline.
Furthermore, the slurry conveying pipeline is made of stainless steel materials, the shape of the slurry conveying pipeline is a cylinder, and a feed inlet is connected with a spiral skeleton rubber pipe for conveying slurry.
Furthermore, the chemical reagent conveying pipeline is made of stainless steel materials and is cylindrical in shape.
Furthermore, the chemical reagent mixing pipeline is made of stainless steel materials, the shape of the chemical reagent mixing pipeline is an annular pipeline, and a layer of antirust paint is sprayed on the outer portion of the chemical reagent mixing pipeline.
Furthermore, the chemical reagent spraying pipeline is irregular in shape, the pipeline is made of stainless steel, and antirust paint is sprayed on the outside of the pipeline.
Furthermore, the outer side of the irregular-shaped pipeline is semi-cylindrical, and the inner side of the irregular-shaped pipeline is semi-rhombic; or the irregular shaped conduit is shuttle shaped.
The invention also discloses a method for adding chemical reagent into paste filling slurry by using the device, which comprises the following steps:
(1) paste slurry is conveyed to a front port through a slurry conveying pipeline and is sprayed out to a goaf;
(2) transporting the high-pressure chemical reagent and the accelerating agent into a chemical reagent mixing pipeline through a chemical reagent conveying pipeline;
(3) the high-pressure chemical reagent and the accelerating agent flow rapidly and are fully mixed in the chemical reagent mixing pipeline and enter the chemical reagent spraying pipeline;
(4) the mixed chemical reagent is uniformly sprayed out from the chemical reagent spraying hole and the cylindrical chemical reagent spraying pipeline;
(5) the chemical reagent, the accelerating agent and the slurry sprayed by high pressure are mixed in the air, so that the slurry is quickly solidified to form paste for filling, and the goaf is filled.
The invention has the beneficial effects that:
(1) the chemical reagent is added conveniently, and the chemical reagent is uniformly scattered;
(2) the slurry and the chemical reagent in the paste can be fully mixed, and the mixing efficiency is high;
(3) the method is simple to operate, easy to realize and low in cost;
(4) the device adopts a mode of adding a chemical reagent and an accelerator at the slurry injection port, so that the formed paste can be rapidly solidified, and the phenomenon that the paste is blocked inside a pipeline due to the fact that a retarder is added in advance is prevented;
(5) the slurry transportation pipeline is wide, and the chemical reagent injection pipeline is streamline, so that the slurry cannot be blocked, and the residual accumulation of the paste in the device cannot be easily caused.
Drawings
FIG. 1 is a schematic perspective view of a device for mixing and adding chemical reagents into paste filling slurry;
FIG. 2 is a front view of a paste filling slurry mixing and chemical reagent adding apparatus;
FIG. 3 is a rear view of the paste fill slurry mixing and chemical adding apparatus;
FIG. 4 is a schematic cross-sectional view of an apparatus for mixing and adding chemical agents to a paste filling slurry;
FIG. 5 is a front view of a paste filling apparatus including a shuttle-type chemical agent spray color pipe;
wherein: 1-slurry transport pipeline; 2-chemical reagent transport pipeline; 3-a chemical reagent mixing pipeline; 4-chemical reagent injection pipe; 5-a chemical reagent injection hole; 6-cylindrical chemical reagent injection tube.
Detailed Description
The invention provides a device and a method for mixing and adding chemical reagents into paste filling sauce, and in order to make the purposes, technical schemes and advantages of the invention more clear, the invention is further described in detail with reference to the accompanying drawings.
Example 1
A device for mixing and adding chemical reagents into paste filling slurry comprises a slurry conveying pipeline 1, wherein the slurry conveying pipeline 1 is made of stainless steel materials and is cylindrical, and a feeding hole is connected with a spiral skeleton rubber pipe for conveying the slurry.
The device also comprises a chemical reagent conveying pipeline 2 welded on the surface of the slurry conveying pipeline 1 in an annular mode, wherein the chemical reagent conveying pipeline 2 is made of stainless steel materials and is cylindrical in shape, and welding strength is guaranteed not to fall off in the filling process.
Chemical reagent mixing tube 3 passes through welding technique and welds at slurry conveying pipeline 1 front end, and this chemical reagent mixing tube 3 links to each other with chemical reagent conveying tube 2, chemical reagent mixing tube 3 chooses for use stainless steel material preparation, and the appearance is the ring conduit, and the outside is the spraying one deck antirust paint in addition.
The rim top edge of 3 bodies of chemical reagent mixing tube is provided with 3 chemical reagent injection pipelines 4 of evenly distributed, makes the chemical reagent of high-pressure injection can accomplish the mixture with thick liquids in the very short time to can in time spout the lotion that mixes well.
The chemical reagent injection pipeline 4 is irregular in shape, the pipeline is made of stainless steel, and anti-rust paint is sprayed on the outer part of the pipeline; the outer side of the irregular pipeline is semi-cylindrical, the inner side of the irregular pipeline is semi-rhombic, and the semi-rhombic surface on the inner side of the irregular pipeline faces the slurry conveying pipeline, so that the blockage to slurry conveying can be reduced, and the ejection of the slurry is facilitated.
The end of 4 one ends of 3 chemical reagent injection pipelines is the annular and assembles on cylindrical chemical reagent injection pipe 6, and chemical reagent injection pipe 4 front surface evenly distributed chemical reagent jet orifices 5 for spray chemical reagent, and can not blockked up by thick liquids.
A method for adding chemical reagents into paste filling slurry by adopting the device comprises the following steps:
(1) paste slurry composed of gangue, coal ash and the like is transported through the slurry transport pipeline 1, so that the slurry is sprayed out of the front end of the transport pipeline to the goaf;
(2) high-pressure chemical reagents are transported through the chemical reagent conveying pipeline 2 and enter the chemical reagent mixing pipeline 3 connected with the chemical reagent conveying pipeline;
(3) the chemical reagent flows rapidly and fully in the annular mixing pipeline under the influence of pressure, and enters the connected chemical reagent injection pipeline 4;
(4) the mixed chemical reagent is sprayed from a chemical reagent spraying hole 5 at the outer front end in the irregular-shaped spraying pipe and a cylindrical chemical reagent spraying pipe 6;
(5) the chemical reagent, the accelerating agent and the slurry sprayed at high pressure are mixed in the air, so that the slurry is quickly solidified to form a paste for filling, and the goaf is filled.
Example 2
A device for mixing and adding chemical reagents into paste filling slurry of a shuttle-shaped chemical reagent color spraying pipeline is shown in figure 5 and comprises a slurry conveying pipeline 1, wherein the slurry conveying pipeline 1 is made of stainless steel materials and is cylindrical in shape, and a feeding hole is connected with a spiral skeleton rubber pipe for conveying the slurry.
The device also comprises a chemical reagent conveying pipeline 2 welded on the surface of the slurry conveying pipeline 1 in an annular mode, wherein the chemical reagent conveying pipeline 2 is made of stainless steel materials and is cylindrical in shape, and welding strength is guaranteed not to fall off in the filling process.
Chemical reagent mixing tube 3 passes through welding technique and welds at slurry conveying pipeline 1 front end, and this chemical reagent mixing tube 3 links to each other with chemical reagent conveying tube 2, chemical reagent mixing tube 3 chooses for use stainless steel material preparation, and the appearance is the ring conduit, and the outside is the spraying one deck antirust paint in addition.
The rim top edge of 3 bodies of chemical reagent mixing tube is provided with 3 chemical reagent injection pipelines 4 of evenly distributed, makes the chemical reagent of high-pressure injection can accomplish the mixture with thick liquids in the very short time to can in time spout the lotion that mixes well.
The chemical reagent injection pipeline 4 is shuttle-shaped, the pipeline is made of stainless steel, and antirust paint is sprayed on the outer part of the pipeline; the irregular pipeline is shuttle-shaped, so that the blockage to slurry transportation can be reduced, and the slurry can be sprayed out easily.
The end of 4 one ends of 3 chemical reagent injection pipelines is the annular and assembles on cylindrical chemical reagent injection pipe 6, and chemical reagent injection pipe 4 front surface evenly distributed chemical reagent jet orifices 5 for spray chemical reagent, and can not blockked up by thick liquids.
A method for adding chemical reagents into paste filling slurry by adopting the device comprises the following steps:
(1) paste slurry composed of gangue, coal ash and the like is transported through the slurry transport pipeline 1, so that the slurry is sprayed out of the front end of the transport pipeline to the goaf;
(2) high-pressure chemical reagents are transported through the chemical reagent conveying pipeline 2 and enter the chemical reagent mixing pipeline 3 connected with the chemical reagent conveying pipeline;
(3) the chemical reagent flows rapidly and fully in the annular mixing pipeline under the influence of pressure, and enters the connected chemical reagent injection pipeline 4;
(4) the mixed chemical reagent is sprayed from a chemical reagent spraying hole 5 at the outer front end in the irregular-shaped spraying pipeline;
(5) the chemical reagent, the accelerating agent and the slurry sprayed at high pressure are mixed in the air, so that the slurry is quickly solidified to form a paste for filling, and the goaf is filled.

Claims (9)

1. An apparatus for mixing and adding chemical agents to paste filling slurry, comprising:
a slurry transport conduit (1);
the chemical reagent conveying pipelines (2) are uniformly distributed on the outer side of the slurry conveying pipeline (1) and are axially fixed on the outer side of the slurry conveying pipeline (1);
the annular chemical reagent mixing pipeline (3), the chemical reagent mixing pipeline (3) is fixedly connected to the outlet end of the slurry conveying pipeline (1) and is communicated with the end part of the chemical reagent conveying pipeline (2); and
a chemical reagent injection pipeline which is fixedly connected to the inner side of the chemical reagent mixing pipeline (3);
the method is characterized in that: the chemical reagent injection pipeline comprises a cylindrical chemical reagent injection pipe (6) and a plurality of chemical reagent injection pipelines (4);
one ends of the plurality of chemical reagent injection pipelines (4) are fixedly connected to the cylindrical chemical reagent injection pipe (6), and the other ends of the plurality of chemical reagent injection pipelines extend outwards in the radial direction by taking the cylindrical chemical reagent injection pipe (6) as the center and are fixedly connected to the chemical reagent mixing pipeline (3);
the chemical reagent spraying pipes (4) are uniformly distributed, and the chemical reagent mixing pipe (3), the chemical reagent spraying pipe (4) and the cylindrical chemical reagent spraying pipe (6) are communicated with each other.
2. Device according to claim 1, characterized in that said chemical injection line comprises three chemical injection ducts (4).
3. The device according to claim 2, characterized in that the chemical injection orifices (5) are evenly distributed on the front surface of the chemical injection duct (4).
4. The device according to claim 1, characterized in that the slurry conveying pipeline (1) is made of stainless steel and is cylindrical in shape, and the feeding port is connected with a spiral skeleton rubber pipe for conveying slurry.
5. The device according to claim 1, characterized in that the chemical agent transport pipe (2) is made of stainless steel and has a cylindrical shape.
6. The device according to claim 1, characterized in that the chemical agent mixing pipe (3) is made of stainless steel material and is shaped like a ring pipe, and a layer of antirust paint is sprayed on the outside.
7. The device according to claim 1, characterized in that the chemical agent injection pipe (4) is irregular in shape, stainless steel is used for the pipe, and rust preventive paint is sprayed on the outside.
8. The apparatus of claim 7, wherein the irregularly shaped conduit is semi-cylindrical on the outside and semi-diamond on the inside or is shuttle shaped.
9. A method for mixing and adding chemicals to a paste filling slurry according to any of claims 1-8, characterized in that the method comprises the steps of:
(1) paste slurry is conveyed to a front port through a slurry conveying pipeline (1) and is sprayed out to a goaf;
(2) transporting the high-pressure chemical reagent and the accelerating agent into the chemical reagent mixing pipeline (3) through the chemical reagent conveying pipeline (2);
(3) the high-pressure chemical reagent and the accelerating agent rapidly flow and are fully mixed in the chemical reagent mixing pipeline (3) and enter the chemical reagent spraying pipeline (4);
(4) the mixed chemical reagent is uniformly sprayed out from the chemical reagent spraying hole (5) and the cylindrical chemical reagent spraying pipe (6);
(5) the chemical reagent, the accelerating agent and the slurry sprayed by high pressure are mixed in the air, so that the slurry is quickly solidified to form paste for filling, and the goaf is filled.
CN201911065310.0A 2019-11-04 2019-11-04 Device and method for mixing and adding chemical reagent into paste filling slurry Active CN110792472B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101892847A (en) * 2010-08-04 2010-11-24 林辉 Novel double liquid grout injecting mixer
CN201723230U (en) * 2009-12-31 2011-01-26 山东天河科技有限公司 Wind-water mixed spray gun for mortar spraying machine
CN102913271A (en) * 2012-10-29 2013-02-06 淮南矿业(集团)有限责任公司 Dust removal system for spraying machine
CN204385727U (en) * 2014-11-14 2015-06-10 福建永强岩土股份有限公司 Spiral grouting preformed pile
CN108867625A (en) * 2018-07-20 2018-11-23 四川锦城智信建设工程有限公司 Long auger guncreting pile grouting behind shaft or drift lining handles construction method and its postposition grouting device
CN109026023A (en) * 2018-08-24 2018-12-18 江苏翰烽美筑工程技术有限公司 A kind of Grouting Pipe and grouting process improving slip casting effect
CN109162667A (en) * 2018-10-11 2019-01-08 吕梁学院 Coal mining two-liquid grouting device
CN208734359U (en) * 2018-08-20 2019-04-12 中钢集团马鞍山矿山研究院有限公司 A kind of hollow screw grouting and reinforcing anchor pole

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201723230U (en) * 2009-12-31 2011-01-26 山东天河科技有限公司 Wind-water mixed spray gun for mortar spraying machine
CN101892847A (en) * 2010-08-04 2010-11-24 林辉 Novel double liquid grout injecting mixer
CN102913271A (en) * 2012-10-29 2013-02-06 淮南矿业(集团)有限责任公司 Dust removal system for spraying machine
CN204385727U (en) * 2014-11-14 2015-06-10 福建永强岩土股份有限公司 Spiral grouting preformed pile
CN108867625A (en) * 2018-07-20 2018-11-23 四川锦城智信建设工程有限公司 Long auger guncreting pile grouting behind shaft or drift lining handles construction method and its postposition grouting device
CN208734359U (en) * 2018-08-20 2019-04-12 中钢集团马鞍山矿山研究院有限公司 A kind of hollow screw grouting and reinforcing anchor pole
CN109026023A (en) * 2018-08-24 2018-12-18 江苏翰烽美筑工程技术有限公司 A kind of Grouting Pipe and grouting process improving slip casting effect
CN109162667A (en) * 2018-10-11 2019-01-08 吕梁学院 Coal mining two-liquid grouting device

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