CN109882238B - Polymer and gangue mixed filling system and method for coal mine goaf - Google Patents

Polymer and gangue mixed filling system and method for coal mine goaf Download PDF

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Publication number
CN109882238B
CN109882238B CN201910104581.6A CN201910104581A CN109882238B CN 109882238 B CN109882238 B CN 109882238B CN 201910104581 A CN201910104581 A CN 201910104581A CN 109882238 B CN109882238 B CN 109882238B
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polymer
gangue
filling
discharge openings
coal mine
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CN109882238A (en
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黄艳利
郭亚超
李俊孟
翟文
张吉雄
董霁红
高华东
韩震
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

The utility model provides a coal mine collecting space area polymer and waste rock mixed filling system, includes waste rock conveying system, polymer mixing system and sprinkler system, and the sprinkler system includes driving system and stirring portion, and sprinkler system includes shower nozzle and shower nozzle governing system, and the top at bottom discharge formula scraper conveyor discharge opening is fixed to the shower nozzle. A method of a coal mine goaf polymer and gangue mixed filling system comprises the following steps: arranging a filling coal mining hydraulic support, installing a polymer and gangue mixed filling system, and starting a gangue transportation system, a polymer mixing system and a spraying system to realize the mixing and filling of gangue and polymer. The coal mine goaf polymer and gangue mixed filling system and method provided by the invention have the advantages that the filling speed is high, the recovery speed is not influenced, the problem that the gangue and polymer are difficult to mix, fill and transport is solved, the filling effect is good, and the application prospect in the coal industry is wide.

Description

Polymer and gangue mixed filling system and method for coal mine goaf
Technical Field
The invention relates to the field of solid filling coal mining and high polymer materials, in particular to a system and a method for mixed filling of polymers and gangue in a coal mine goaf.
Background
In recent years, with the continuous development of coal resources and the continuous improvement of mining technologies, the solid filling coal mining technology has become one of the key technologies for recovering 'three-down' pressed coal. The traditional waste rock filling has the problems of large stacking void ratio, large under-roof quantity, poor filling effect, short service life and the like. Polymer adhesives and other polymeric materials proposed in the disaster prevention and control process can be matched with gangue for goaf filling, but the gangue and the polymer are mixed to cause the problem of difficult transportation. Therefore, a new filling system and method for mixing polymer and gangue is urgently needed.
Disclosure of Invention
The invention aims to provide a system and a method for filling a coal mine goaf by mixing polymer and gangue, so as to realize the purpose of filling the gangue and the polymer in a mixing manner.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a mixed filling system of polymer and gangue in a coal mine goaf comprises a gangue transport system, a polymer mixing system and a spraying system, wherein the gangue transport system comprises a gangue conveyor, a transfer conveyor and a bottom-dump scraper conveyor which are sequentially connected; the polymer hybrid system is for removing the trucd mixer, the feed bin has on removing the trucd mixer, the agitator tank, mixing system and air compression system, the feed bin is two, polyester polyol and isocyanate are equipped with respectively in two feed bins, the feed bin is located the agitator tank top, the feed bin lower part has the hopper discharge gate, the hopper discharge gate stretches into in the agitator tank, mixing system includes driving system and stirring portion, the upper end of stirring portion links to each other with driving system, the stirring portion is located the agitator tank, air compression system passes through the pneumatic tube and links to each other with the upper portion of agitator tank, sprinkling system includes shower nozzle and shower nozzle governing system, the one end of fortune material pipe links to each other with the bottom of agitator tank, the other end of fortune material pipe links to each other with the shower nozzle, the top.
In a further preferable technical scheme, a hopper is arranged above the bin, and a bin control switch is arranged at the lower part of the hopper.
As a further preferable technical solution, the discharge port of the hopper is provided with a discharge port control valve.
As a further preferred technical scheme, the power system comprises a transmission motor, a linkage shaft and a transmission joint which are sequentially connected, and the upper end of the stirring part is fixed on the transmission joint.
As a further preferred technical scheme, the material conveying pipe is a PA armored nylon hose, the inner diameter of the material conveying pipe is 20mm, and the outer diameter of the material conveying pipe is 25 mm.
According to a further preferable technical scheme, the volume ratio of the polyester polyol to the isocyanate is 1: 1-1: 1.2, and the polymer mixing amount is 10-12%.
According to a further preferable technical scheme, the spray head adjusting system comprises a position adjuster and a spray head control valve, the spray head is an automatic adjusting porous spray head, the automatic adjusting porous spray head is located at the lower end of the position adjuster, the upper end of the position adjuster is hinged to a back top beam of the goaf filling hydraulic support, and the spray head control valve is located on the material conveying pipe.
As a further preferred technical scheme, the mobile mixer truck is also provided with an intelligent induction controller, the gangue conveyor is provided with a belt weigher, and the spray head control valve and the belt weigher are connected with the intelligent induction controller through a wireless transmission device.
A coal mine goaf polymer and gangue mixed filling method comprises the following steps:
s1: arranging a plurality of six-column supporting type filling coal mining hydraulic supports on a working face, installing a polymer and gangue mixed filling system, positioning a bottom-discharge type scraper conveyer at the end of the filling working face, and numbering discharge openings on the bottom-discharge type scraper conveyer relative to the gangue conveyer from far to near in sequence;
s2: the gangue conveying system, the polymer mixing system and the spraying system are started, and when the bottom-dump scraper conveyor conveys the gangue to the position of the No. 3 discharge port, the intelligent induction controller opens the spray head control valves above the No. 1, No. 2 and No. 3 discharge ports for spraying;
s3: after waste rocks are filled below the No. 1, No. 2 and No. 3 discharge openings, the No. 1 and No. 3 discharge openings and the spray head control valves above the No. 1 and No. 3 discharge openings are closed, the No. 4 and No. 5 discharge openings and the spray head control valves above the No. 4 and No. 5 discharge openings are opened simultaneously, the fillers below the No. 1, No. 2 and No. 3 discharge openings are tamped in time, and the No. 2 discharge openings and the porous spray heads above the discharge openings continuously discharge and spray the polymers and the waste rocks in the tamping process;
s4: after No. 2, No. 4, 5 discharge openings fill down, close the shower nozzle control valve of No. 2, No. 5 discharge openings and top, open No. 6, No. 7 discharge openings simultaneously, in time tamp the filling material under No. 2, No. 4, No. 5 discharge openings, the porous shower nozzle of No. 4 discharge openings and top is continuously unloaded and is sprayed and supply with polymer and waste rock for the tamping process, circulates in proper order, accomplishes the filling in whole collecting space area.
As a further preferred technical scheme, intelligent linkage control is realized through an intelligent induction controller on the polymer spraying amount and the gangue filling efficiency, and the control equation is that a is kb
Wherein a is the spraying amount of the polymer and the unit t/h; b is the waste filling efficiency, unit t/h; k is a control proportionality coefficient, and k is more than or equal to 0.1 and less than or equal to 0.25.
Compared with the prior art, the invention has the beneficial effects that:
the coal mine goaf polymer and gangue mixed filling system and method have the advantages of simple equipment structure, convenience in disassembly and assembly, simple and convenient process, high filling speed, no influence on the mining speed, capability of overcoming the difficulty in mixed filling and transportation of gangue and polymer, and good filling effect; the spraying system is controlled by radio signals, the requirements of safe and efficient production are met, and the method has wide application prospects in the coal industry.
Drawings
FIG. 1 is a work surface layout;
FIG. 2 is a schematic view of a sprinkler system configuration;
FIG. 3 is a schematic structural view of a mobile mixer truck;
FIG. 4 is a top plan view of the mobile mixer truck;
in FIGS. 1-4: 1-automatic adjustment porous spray head, 2-position regulator, 3-material conveying pipe, 4-spray head control valve, 5-self-moving transfer conveyor, 6-gangue belt conveyor, 7-hopper, 8-bin control switch, 9-bin A, 10-bin B, 11-air compression system, 12-driving motor, 13-linkage shaft, 14-driving rotary head, 15-stirring part, 16-air pressure pipe, 17-air pressure meter, 18-pressure control valve, 19-moving mixer, 20-bracket, 21-hopper discharge port, 22-discharge port control valve, 23-mixing box, 24-intelligent induction controller, 25-discharge port, 26-belt conveyor, 27-goaf, 28-bottom-unloading scraper conveyor, 29-filling the hydraulic support.
The specific implementation mode is as follows:
the invention is further described below with reference to the accompanying drawings.
Examples
As shown in fig. 1-4, the mixed filling system of the polymer and the gangue in the coal mine goaf comprises a gangue transportation system, a polymer mixing system and a spraying system, wherein the gangue transportation system comprises a gangue belt conveyor 6, a self-moving transfer conveyor 5 and a bottom-dump scraper conveyor 28 which are connected in sequence. The polymer mixing system is a mobile mixer truck 19, and the mobile mixer truck 19 is movable with a bottom dump flight conveyor 28. The mobile mixer truck 19 is provided with a stock bin (9, 10), a mixing box 23, a mixing system and a gas compressing system 11. The two bins are respectively a bin A9 and a bin B10, and polyester polyol and isocyanate are respectively filled in the two bins. The volume ratio of the polyester polyol to the isocyanate is 1: 1-1: 1.2, the polymer content is 10-12%, preferably, the volume ratio of the polyester polyol to the isocyanate is 1:1.1, and the polymer content is 10%. The storage bin (9, 10) is positioned above the stirring box 23, the lower part of the storage bin is provided with a hopper discharge port 21, the hopper discharge port 21 extends into the stirring box 23, and the hopper discharge port 21 is provided with a discharge port control valve 22. A hopper 7 is arranged above the bin, and a bin control switch 8 is arranged at the lower part of the hopper 7. The stirring system comprises a power system and a stirring part 15, the power system comprises a transmission motor 12, a linkage shaft 13 and a transmission joint 14 which are sequentially connected, and the upper end of the stirring part 15 is fixed on the transmission joint 14. The stirring section 15 is located in the stirring tank 23, and the stirring section 15 has a helical blade. The pneumatic system 11 is connected to the upper part of the stirring tank 23 through a pneumatic tube 16. The sprinkling system comprises a spray head and a spray head adjusting system, one end of the material conveying pipe 3 is connected with the bottom of the stirring box 23, the other end of the material conveying pipe 3 is connected with the spray head, and the spray head is arranged above the discharge opening 25 of the bottom-dump scraper conveyor in pairs. Preferably, the spray head adjusting system comprises a position adjuster 2 and a spray head control valve 4, the spray head is a multi-automatic adjusting porous spray head 1, the spray head control valve 4 is positioned on a material conveying pipe 3, the material conveying pipe 3 is a PA armored nylon hose, the inner diameter of the material conveying pipe is 20mm, the outer diameter of the material conveying pipe is 25mm, the automatic adjusting porous spray head 1 is positioned at the lower end of the position adjuster 2, the upper end of the position adjuster 2 is hinged to a back top beam of a goaf filling hydraulic support 29, and the position adjuster 2 can adjust the height of the automatic adjusting porous spray head 1 from a discharge opening 25. The height from the discharge opening 25 is 10-15 cm, the spraying included angle of the two spray heads can be automatically adjusted according to the filling height, and the adjusting range is 50-90 degrees.
The mobile mixer truck 19 is also provided with an intelligent induction controller 24, and the gangue belt conveyor 6 is provided with a belt weigher which is used for automatically monitoring the gangue filling efficiency. The spray nozzle control valve 4 and the belt weigher are connected with the intelligent induction controller 24 through a wireless transmission device, and the intelligent induction controller 24 achieves intelligent linkage control of polymer spraying amount and waste filling efficiency through regulating and controlling the spray nozzle control valve 4 according to waste filling efficiency obtained by the belt weigher.
Example 2
The method for filling by using the polymer and gangue mixed filling system in the embodiment 1 comprises the following specific steps:
1) taking a certain ore as an example, the working face of the ore is 140m long, the average thickness is 4.2m, the average inclination angle is 5-8 degrees, the gas emission amount is low, 94 six-column supporting type filling coal mining hydraulic supports are arranged on the working face, a polymer and gangue mixed filling system is installed, a bottom-discharge type scraper conveyer is positioned at the end of the filling working face, and the discharge openings on the bottom-discharge type scraper conveyer are numbered as No. 1-94 in sequence from far to near relative to the gangue conveyer; considering the specification and safety of a roadway of the filling working surface, arranging the movable polymer mixer truck 19 at the position of 4m of the end of the filling working surface; respectively adding polyester polyol and isocyanate into a bin A9 and a bin B10 in a ratio of 1:1.1, wherein the mixing amount is 10%, and timely starting a stirring box for stirring;
2) communicating a material conveying pipe 3 with an automatic adjusting porous spray head 1, starting an air compression system 11 and a self-moving type transshipment conveyor 5, and opening No. 1, No. 2 and No. 3 discharge openings;
3) when the bottom-dump scraper conveyer 28 transports the gangue to the position of No. 3 discharge opening, the intelligent induction controller is used
24 open shower nozzle control switch 4 of discharge opening top No. 1, No. 2, No. 3 and carry out spraying of polymer mixture, realize polymer spraying volume and waste filling efficiency's intelligent coordinated control through intelligent induction controller simultaneously, and the control equation is a kb
Wherein a is the spraying amount of the polymer and the unit t/h; b is the waste filling efficiency, unit t/h; k is a control proportionality coefficient, and k is more than or equal to 0.1 and less than or equal to 0.25;
4) after the waste rock is filled below the No. 1, No. 2 and No. 3 discharge openings, the No. 1 and No. 3 discharge openings and the spray head control switches (4) above the No. 1 and No. 3 discharge openings are closed, and the No. 4 and No. 5 discharge openings and the spray head control switches above the No. 4 and No. 5 discharge openings are opened simultaneously, at the moment, the No. 1, No. 2, No. 3 discharge openings and the spray head control,
The filling material under No. 3 discharge openings in time tamps, the porous shower nozzle of No. 2 discharge openings and top is continuously unloaded and is sprayed and supply with polymer and waste rock for the process of tamping, treat No. 2, No. 4, 5 discharge openings under fill full back, close No. 2, the shower nozzle control switch of No. 5 discharge openings and top, open No. 6 simultaneously, No. 7 discharge openings, to No. 2, No. 4, 5 the filling material under the discharge opening in time tamps, the porous shower nozzle of No. 4 discharge openings and top is continuously unloaded and is sprayed and supply with polymer and waste rock for the process of tamping, circulate in proper order and accomplish under No. 94 discharge openings and tamp, the week and the beginning, accomplish the filling in whole collecting space area.
Because the ore geological condition is better, the gangue conveying capacity of the gangue belt conveyor 6 is larger, in order to improve the filling speed, the height between the automatic adjusting porous spray heads 1 and the discharge opening 25 is adjusted to be 15cm, and the injection included angle between the two automatic adjusting porous spray heads 1 is adjusted to be 70 degrees.

Claims (10)

1. A mixed filling system of polymer and gangue in a coal mine goaf is characterized by comprising a gangue transport system, a polymer mixing system and a spraying system, wherein the gangue transport system comprises a gangue conveyor, a transfer conveyor and a bottom discharge scraper conveyor which are sequentially connected; the polymer hybrid system is for removing the trucd mixer, the feed bin has on removing the trucd mixer, the agitator tank, mixing system and air compression system, the feed bin is two, polyester polyol and isocyanate are equipped with respectively in two feed bins, the feed bin is located the agitator tank top, the feed bin lower part has the hopper discharge gate, the hopper discharge gate stretches into in the agitator tank, mixing system includes driving system and stirring portion, the upper end of stirring portion links to each other with driving system, the stirring portion is located the agitator tank, air compression system passes through the pneumatic tube and links to each other with the upper portion of agitator tank, sprinkling system includes shower nozzle and shower nozzle governing system, the one end of fortune material pipe links to each other with the bottom of agitator tank, the other end of fortune material pipe links to each other with the shower nozzle, the top.
2. The system for polymer and gangue mixture filling of a coal mine goaf according to claim 1, wherein a hopper is arranged above the hopper, and a hopper control switch is arranged at the lower part of the hopper.
3. The system for polymer and gangue mixed filling of a coal mine goaf according to claim 1, wherein a discharge port control valve is arranged on a discharge port of the hopper.
4. The system for mixing and filling the polymer and the gangue in the coal mine goaf according to the claim 1, wherein the power system comprises a transmission motor, a linkage shaft and a transmission joint which are sequentially connected, and the upper end of the stirring part is fixed on the transmission joint.
5. The system for mixing and filling polymer and gangue in a coal mine goaf according to claim 1, wherein the material conveying pipe is a PA armored nylon hose with an inner diameter of 20mm and an outer diameter of 25 mm.
6. The coal mine goaf polymer and gangue mixed filling system according to claim 1, wherein the volume ratio of polyester polyol to isocyanate is 1: 1-1: 1.2, and the polymer content is 10-12%.
7. The system for mixing and filling the polymer and the gangue in the goaf of the coal mine according to any one of claims 1 to 6, wherein the spray head adjusting system comprises a position adjuster and a spray head control valve, the spray head is an automatic adjusting porous spray head, the automatic adjusting porous spray head is positioned at the lower end of the position adjuster, the upper end of the position adjuster is hinged on a back top beam of a goaf filling hydraulic support, and the spray head control valve is positioned on the material conveying pipe.
8. The system for mixing and filling polymer and gangue in a coal mine goaf according to claim 7, wherein the mobile mixer truck is further provided with an intelligent induction controller, the gangue conveyor is provided with a belt scale, and the spray head control valve and the belt scale are connected with the intelligent induction controller through a wireless transmission device.
9. A coal mine goaf polymer and gangue mixed filling method is characterized by comprising the following steps:
s1: arranging a plurality of six-column supporting type filling coal mining hydraulic supports on a working face, installing a polymer and gangue mixed filling system in claim 1, positioning a bottom-dump scraper conveyor at the end of the filling working face, and numbering discharge openings on the bottom-dump scraper conveyor relative to the gangue conveyor from far to near in sequence;
s2: the gangue conveying system, the polymer mixing system and the spraying system are started, and when the bottom-dump scraper conveyor conveys the gangue to the position of the No. 3 discharge port, the intelligent induction controller opens the spray head control valves above the No. 1, No. 2 and No. 3 discharge ports for spraying;
s3: after waste rocks are filled below the No. 1, No. 2 and No. 3 discharge openings, the No. 1 and No. 3 discharge openings and the spray head control valves above the No. 1 and No. 3 discharge openings are closed, the No. 4 and No. 5 discharge openings and the spray head control valves above the No. 4 and No. 5 discharge openings are opened simultaneously, the fillers below the No. 1, No. 2 and No. 3 discharge openings are tamped in time, and the No. 2 discharge openings and the porous spray heads above the discharge openings continuously discharge and spray the polymers and the waste rocks in the tamping process;
s4: after No. 2, No. 4, 5 discharge openings fill down, close the shower nozzle control valve of No. 2, No. 5 discharge openings and top, open No. 6, No. 7 discharge openings simultaneously, in time tamp the filling material under No. 2, No. 4, No. 5 discharge openings, the porous shower nozzle of No. 4 discharge openings and top is continuously unloaded and is sprayed and supply with polymer and waste rock for the tamping process, circulates in proper order, accomplishes the filling in whole collecting space area.
10. The method for filling the coal mine goaf by mixing the polymer and the gangue is characterized in that intelligent linkage control is realized by an intelligent induction controller according to the polymer spraying amount and the gangue filling efficiency, and the control equation is
a=kb
Wherein a is the spraying amount of the polymer and the unit t/h; b is the waste filling efficiency, unit t/h; k is a control proportionality coefficient, and k is more than or equal to 0.1 and less than or equal to 0.25.
CN201910104581.6A 2019-02-01 2019-02-01 Polymer and gangue mixed filling system and method for coal mine goaf Active CN109882238B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112112672A (en) * 2020-09-22 2020-12-22 中国矿业大学 Gob-side entry retaining roadside support body construction method based on gangue cement-based material

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Publication number Priority date Publication date Assignee Title
JP2010043503A (en) * 2008-08-18 2010-02-25 Toyo Tire & Rubber Co Ltd Underground space part filling method
CN102269013A (en) * 2011-07-06 2011-12-07 湖南科技大学 Method for mechanically filling gangue on single support working surface under complex coal seam condition
CN102558498A (en) * 2012-01-04 2012-07-11 山西兆信生物科技有限公司 Polyurethane reinforcing and filling materials for coal mine
CN103939139A (en) * 2014-04-25 2014-07-23 中国矿业大学 Equipment matching method for solid-filling coal face of coal mine
CN106321102A (en) * 2016-09-08 2017-01-11 中国矿业大学 Coalmine consolidated solid strip filling coal mining method
CN108083701A (en) * 2017-12-22 2018-05-29 辽宁工程技术大学 A kind of early-strength geo-polymer paste filling material and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010043503A (en) * 2008-08-18 2010-02-25 Toyo Tire & Rubber Co Ltd Underground space part filling method
CN102269013A (en) * 2011-07-06 2011-12-07 湖南科技大学 Method for mechanically filling gangue on single support working surface under complex coal seam condition
CN102558498A (en) * 2012-01-04 2012-07-11 山西兆信生物科技有限公司 Polyurethane reinforcing and filling materials for coal mine
CN103939139A (en) * 2014-04-25 2014-07-23 中国矿业大学 Equipment matching method for solid-filling coal face of coal mine
CN106321102A (en) * 2016-09-08 2017-01-11 中国矿业大学 Coalmine consolidated solid strip filling coal mining method
CN108083701A (en) * 2017-12-22 2018-05-29 辽宁工程技术大学 A kind of early-strength geo-polymer paste filling material and preparation method thereof

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