CN105736045B - A kind of the pocket type filling system and its placement method of control gob floor gushing water - Google Patents

Abstract

The invention discloses a bag-type filling system and a filling method for controlling water inrush from the bottom plate of a goaf, which includes an underground gangue crushing station, a shuttle mine car, a first scraper conveyor, a reloader, a belt conveyor and an unloading machine. material device. The underground gangue crushing station is used to crush the underground raw gangue, the shuttle mine car is used to transport the crushed gangue, the discharge end of the first scraper conveyor is overlapped with the feed end of the transfer machine, and the discharge end of the transfer machine is overlapped with the belt conveyor , The belt conveyor is slidingly connected with the unloading device. The filling system and its filling method can realize the underground crushing of primary gangue without raising the gangue, reduce the lifting and transfer links, and reduce the production cost of the mine; the gangue bags can be automatically stacked in the goaf, with a high degree of automation; the gangue can be collected underground Safe disposal, reducing land occupation, and reducing environmental pollution; gangue bags in gobs are stacked neatly, with good roof connection effect, small void ratio, high filling rate, can control the movement of surrounding rocks, and have a good effect in preventing water inrush from the floor.

Description

A bag-type filling system and filling method for controlling water inrush from gob floor

technical field

The invention relates to a coal mine goaf filling system and a filling method thereof, in particular to a bag-type filling system and a filling method for controlling water inrush from the floor of the goaf.

Background technique

"Three downs" (under buildings, under railways, under water bodies) coal pressing in my country's coal mines is relatively common. According to statistics, the total amount of coal pressed in key state-owned coal mines is about 13.8 billion tons, of which nearly 9 billion tons are pressed under buildings. With the continuous expansion of villages and towns, the actual amount of coal pressure is much higher than this figure. Moreover, these reserves are mainly distributed in the eastern regions with relatively good industrial foundation, superior development conditions, prominent contradiction between production and demand, and relatively developed economy, such as Shandong, Henan, Hebei, Anhui, Jiangsu and other provinces. Take Shandong as an example: Coal mining in Shandong has a history of hundreds of years. In addition, there are dense villages and buildings in the province. There are 1,949 coal-pressing villages, and the coal-pressing villages account for 60% of the recoverable reserves. According to Qiao Naichen, director of the Shandong Provincial Coal Industry Bureau, if protective mining measures are not taken, the remaining recoverable coal reserves will be difficult to maintain for 20 years. Therefore, how to liberate the "three undercuts" of coal pressing and extend the service life of old coal mining enterprises has become an issue that affects my country's energy resources. important issues of security and social stability.

Coal gangue is the waste produced in the process of coal production and washing, and its annual discharge is equivalent to 10% to 15% of coal production. At present, the total stock of coal gangue in the country has reached 4.5 billion tons, forming more than 1,700 gangue hills, covering an area of more than 30,000 ha, and is growing at a rate of 100 million tons per year. Coal gangue has been stored for a long time, occupying a large amount of land, polluting water sources, and generating harmful gases such as H ₂ S and SO ₂ after spontaneous combustion, which poses a huge hazard to the ecological environment. How to realize the safe and reasonable disposal of coal gangue has become a key issue related to the construction of a resource-saving and environment-friendly society in our country. In this regard, some scholars have proposed the concept of "gangue filling", which not only realizes the safe disposal of coal gangue, but also liberates the "three-down" coal pressing.

Gangue filling is to transfer underground raw gangue or surface gangue gangue to the underground goaf, and fill the goaf with gangue to achieve the purpose of controlling the movement of the overlying rock layer and slowing down the subsidence of the surface. The existing gangue filling systems are mainly divided into three types: (1) "Garge dumping", which transports gangue to the goaf through a belt conveyor or a scraper conveyor, which has a large amount of underfilling and a low filling rate , the gangue heap has a large void ratio, a large amount of compression, and has the disadvantages of controlling the movement of the overlying rock layer and slowing down the subsidence of the surface; The tamping mechanism placed behind the support further tamps the gangue. Compared with the "throwing gangue" method, the filling rate is improved, and the void ratio of the gangue pile is reduced, but there is still a shortage of jacking, and the system needs to be installed more There are many tamping mechanisms, the system is complex, and the degree of automation is low; (3) "Bag turning filling", which is to throw the bagged gangue to the goaf through the bag turning mechanism after bagging the gangue, and there is disorder in the accumulation of gangue bags. There are large gaps between them, the void ratio is large, and the shortcomings of controlling the movement of the overlying strata and slowing down the subsidence of the surface are poor.

Contents of the invention

In view of the above existing problems, the present invention proposes a bag-type filling system and its filling method for controlling water inrush from the floor of the goaf. The filling system and its filling method can realize the underground crushing of the original gangue, the gangue does not go up the well, and the lifting is reduced. and transshipment links to reduce mine production costs; gangue bags can be automatically stacked to the goaf, with a high degree of automation; underground safe disposal of gangue can be realized, reducing land occupation and reducing environmental pollution; gangue bags in the goaf are stacked neatly, The roof connection effect is good, the void ratio is small, the filling rate is high, the movement of surrounding rock is controlled, and the effect of preventing water inrush from the floor is good.

Technical scheme of the present invention comprises:

A bag-type filling system for controlling water inrush from the floor of a goaf, which includes an underground gangue crushing station, a shuttle mine car, a first scraper conveyor, a reloader, a belt conveyor, and a discharge device. The underground gangue crushing The station is used to crush the primary gangue underground, optimize the particle size distribution of the crushed gangue, and reduce the void ratio, and the shuttle mine car is used to transport the crushed gangue;

The discharge end of the first scraper conveyor is overlapped with the feed end of the reloader, the discharge end of the reloader is overlapped with the belt conveyor, and the belt conveyor slides with the unloading device connect.

Further, the underground gangue crushing station includes a bottom dump mine car, a bottom dump pit, a second scraper conveyor, a vibrating feeder, a jaw crusher and a gangue bin, and the bottom dump mine car is connected to the The bottom unloading pit is movably connected by rails. A second scraper conveyor is installed in the bottom unloading pit. The discharge end of the second scraper conveyor extends to the top of the gangue bin. The second scraper conveyor and the The vibrating feeder is overlapped, the discharge port of the vibrating feeder is lapped with the feed port of the jaw crusher, and the discharge port of the jaw crusher is lapped with the gangue bin;

An anti-drop net to prevent people from falling is installed on the top of the gangue bin;

The discharge port of the gangue bin is provided with a discharge gate, which is convenient for controlling the output of crushed gangue in the bin;

The gangue bin adopts a concrete wall to reduce the sliding resistance of the crushed gangue and facilitate the flow of the crushed gangue from the gangue bin.

Further, a lower hopper is installed above the feeding end of the first scraper conveyor;

The first scraper conveyor is fixed on the mining flatbed truck through telescopic legs, which is convenient for adjusting the attitude of the scraper conveyor;

A discharge hopper is installed at the discharge end of the first scraper conveyor.

Further, the reloading machine is fixed on the mining flatbed vehicle through telescopic legs, which is convenient for adjusting the attitude of the reloading machine.

Further, the belt conveyor is a flat belt conveyor, and the belt conveyor is suspended on the rear tail beam of the hydraulic support through a telescopic rope.

Further, the unloading device includes walking slide rails, sliders, rollers, brackets, baffles, motors, fixed plates, couplings, hydraulic cylinders, supporting legs and push plates, and the walking slide rails and belt conveyors fixedly connected, the walking slide rail is slidably connected with the slider and the roller, the slider is fixedly connected with the support leg, the support leg is fixedly connected with the bracket, and the roller passes through the joint The shaft is fixedly connected with the engine, the engine is fixedly connected with the fixed plate, the fixed plate is fixedly connected with the bracket, the baffle is fixedly connected with the bracket, and the cylinder body of the hydraulic cylinder is connected with the The bracket is fixedly connected, and the push plate is fixedly connected with the piston rod of the hydraulic cylinder;

A stress sensor is fixedly installed on the baffle, and the stress sensor is connected to an electric control device for controlling the hydraulic oil cylinder.

A bag filling method for controlling water inrush from a goaf floor, which mainly includes the following steps:

A. Primary gangue is broken, and the bottom dumping mine car is used to transport the raw gangue to the underground gangue crushing station, crush the raw gangue, and store the broken gangue in the gangue bin;

B. The raw gangue is reloaded, and the broken gangue stored in the gangue bin is transferred to the filling working face with a shuttle mine car;

C. Bag the raw gangue, unload the crushed gangue on the shuttle mine car into the lower hopper installed above the feed end of the first scraper conveyor, and bag it at the discharge end of the first scraper conveyor;

D. Fill the goaf.

Further, filling the goaf in the step D includes the following steps:

① Adjust the retractable rope, put the belt conveyor to the lowest position, and run the unloading device to the side of the inclined direction of the working face;

②When the bags of broken gangue are transferred to the position of the unloading device through the transfer machine and the belt conveyor, the unloading device will automatically push the bag of gangue to the area to be filled;

③ Move the unloading device to the other side of the inclined direction of the working face for a distance of one gangue bag width, and automatically push the gangue bag transported to this position to the area to be filled;

④Repeat step ③ until filling to the other side of the inclined direction of the working face;

⑤Adjust the retractable rope, lift the belt conveyor to the height of a gangue bag, and then repeat steps ②-④;

⑥Repeat step ⑤ until the entire height of the working face is completely filled with gangue bags;

⑦Move the hydraulic support forward by the length of a gangue bag, and then repeat steps ①-⑥ until the entire goaf is completely filled.

The beneficial technical effect obtained by adopting the above technical scheme is:

(1) It can realize the underground crushing of the original gangue, and the gangue does not go up the well, which reduces the lifting and transshipment links, and reduces the production cost of the mine;

(2) Gangue bags can be automatically stacked to the goaf, with a high degree of automation;

(3) It can realize safe underground disposal of gangue, reduce land occupation, and reduce environmental pollution;

(4) The gangue bags in the goaf are stacked neatly, with good roof connection effect, small void ratio, high filling rate, good effect in controlling the movement of surrounding rocks and preventing water inrush from the floor.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is a schematic plan view of a bag filling system for controlling water inrush from the goaf floor.

Fig. 2 is a sectional view of section A-A.

Fig. 3 is a B-B sectional view.

Fig. 4 is a schematic diagram of an underground gangue crushing station.

Fig. 5 is a front view of the unloading device.

Figure 6 is a side view of the unloading device.

Fig. 7 is a top view of the unloading device.

In the figure: 1. Shuttle mine car, 2. The first scraper conveyor, 3. Reloader, 4. Belt conveyor, 5. Hydraulic support, 6. Shearer, 7. Gangue bag, 8. Mobile substation , 9. Emulsion pump station, 10. End bracket, 11. Area to be filled, 12. Track, 13. Turnout, 14. Belt trough, 15. Track trough, 16. Mining flatbed car, 17. Hopper , 18, telescopic leg, 19, unloading device, 192, walking slide rail, 193, roller, 194, coupling, 195, engine, 196, fixed plate, 197, supporting leg, 198, hydraulic cylinder, 199, bracket , 1910, electric control device, 1911, push plate, 1912, baffle plate, 1913, stress sensor, 1914, slider; 20, bottom unloading mine car, 21, bottom unloading pit, 22, second scraper conveyor, 23. Vibrating feeder, 24. Jaw crusher, 25. Gangue bin, 26. Discharge gate, 27. Retractable rope, a, length of gangue bag, b, width of gangue bag, h, height of gangue bag, H , Working surface height.

Detailed ways

Below in conjunction with accompanying drawing 1-7, the implementation of the present invention is described further:

A bag-type filling system for controlling water inrush from the floor of the goaf, including an underground gangue crushing station for crushing underground raw gangue, optimizing the particle size distribution of gangue, and reducing the void ratio of gangue, and a shuttle mine for transporting crushed gangue Vehicle 1, first scraper conveyor 2, reloader 3, belt conveyor 4 and unloading device 19, the discharge end of first scraper conveyor 2 overlaps with the feed end of reloader 3, and reloader 3 discharges The end is overlapped with the belt conveyor 4, and the belt conveyor 4 is slidingly connected with the unloading device 19. A lower hopper 17 is installed above the feeding end of the first scraper conveyor 2, and the first scraper conveyor 2 is fixed by telescopic legs 18. On the flatbed truck 16 for mining, a discharge hopper is installed at the discharge end of the first scraper conveyor 2 .

The underground gangue crushing station includes a bottom dump mine car 20, a bottom dump pit 21, a second scraper conveyor 22, a vibrating feeder 23, a jaw crusher 24 and a gangue bin 25, the bottom dump mine car 20 and the bottom dump The pit 21 is movably connected by rails. A second scraper conveyor 22 is installed in the bottom unloading pit 21. The discharge end of the second scraper conveyor 22 extends to the top of the gangue bin 25. The second scraper conveyor 22 is connected to the vibrating feeder. The feeder 23 overlaps, the discharge port of the vibrating feeder 23 overlaps the feed port of the jaw crusher 24, the discharge port of the jaw crusher 24 overlaps the gangue bin 25, and the top of the gangue bin 25 is equipped with The anti-falling net to prevent people from falling, the discharge port of the gangue bin 25 is equipped with a discharge gate 26 to control the amount of crushed gangue in the bin, and the gangue bin is made of concrete side walls to reduce the sliding resistance of the broken gangue and facilitate the crushing of the gangue from the ground. Gangue bin outflow.

The reloading machine 3 is fixed on the mining flatbed truck 16 through telescopic legs 18 .

Belt conveyor 4 selects flat belt conveyor for use, adopts retractable rope 27 to hang belt conveyor 4 on the rear tail beam of hydraulic support 5.

Unloading device 19 comprises walking slide rail 192, slide block 1914, roller 193, support 199, baffle plate 1912, motor 195, fixed plate 196, coupling 194, hydraulic oil cylinder 198, support leg 197 and push plate 1911, walking slide The rail 192 is fixedly connected with the belt conveyor 4, the walking slide rail 192 is slidably connected with the slider 1914 and the roller 193, the slider 1914 is fixedly connected with the supporting leg 197, the supporting leg 197 is fixedly connected with the support 199, and the roller 193 passes through the coupling 194 It is fixedly connected with the engine 195, the engine 195 is fixedly connected with the fixed plate 196, the fixed plate 196 is fixedly connected with the bracket 199, the baffle plate 1912 is fixedly connected with the bracket 199, the cylinder body of the hydraulic cylinder 198 is fixedly connected with the bracket 199, and the push plate 1911 is connected with the hydraulic pressure The piston rod of the oil cylinder 198 is fixedly connected, and a stress sensor 1913 is fixedly installed on the baffle 1912 , and the stress sensor 1913 is connected with an electric control device 1910 for controlling the hydraulic oil cylinder 198 .

The present invention also provides a bag-type filling method for controlling water inrush from the goaf floor, which mainly includes the following steps:

Step A, crushing the raw gangue, transporting the raw gangue to the underground gangue crushing station with the bottom dump mine car 20, crushing the raw gangue, and storing the crushed gangue in the gangue bin 25;

Step B, reloading the raw gangue, using the shuttle mine car 1 to transfer the broken gangue stored in the gangue bin 25 to the filling face;

Step C, bagging raw gangue, unloading the crushed gangue on the shuttle mine car 1 into the lower hopper 17 installed above the feeding end of the first scraper conveyor 2, and discharging on the first scraper conveyor 2 end bag;

Step D, filling the goaf.

Step D is more specifically:

① Adjust the retractable rope 27, put the belt conveyor 4 to the lowest position, and run the unloading device 19 to the side of the belt trough (track trough);

② When the bagged broken gangue is transferred to the position of the unloading device 19 via the transfer machine 3 and the belt conveyor 4, the unloading device 19 automatically pushes the bag of gangue to the area 11 to be filled;

③ Advance the unloading device 19 to the track trough (belt trough) side for a distance of a gangue bag width b, and automatically push the gangue bag transported to this position to the area 11 to be filled;

④Repeat step ③ until it is filled to the side of the track slot (belt slot) in turn;

⑤ adjust the retractable rope 27, lift the belt conveyor 4 to a gangue bag height h, and repeat steps ②-④;

⑥Repeat step ⑤ until the entire height H of the working face is completely filled with gangue bags;

⑦Move the hydraulic support 5 forward by a distance of the length a of the gangue bag, and then repeat steps ①-⑥ until the entire goaf is completely filled.

Of course, the above descriptions are only preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments. It should be noted that all equivalent substitutions made by any person skilled in the art under the guidance of this specification , obvious deformation forms, all fall within the essential scope of this specification, and should be protected by the present invention.

Claims (5)

1. a kind of pocket type filling system of control gob floor gushing water comprising downhole gangue Crushing Station, shuttle car, first Drag conveyor, elevating conveyor, belt conveyor and device for discharging, the downhole gangue Crushing Station is for being crushed the primary cash in underground Stone optimizes and is crushed spoil size grading, reduces voidage, the shuttle car is for transporting broken spoil；

The first drag conveyor discharge end is overlapped with the elevating conveyor feed end, the elevating conveyor discharge end and the belt Conveyer overlaps, and the belt conveyor is slidably connected with the device for discharging；

The downhole gangue Crushing Station includes that unload hole, the second drag conveyor, oscillating feeder, jaw broken for drop-bottom car, bottom Broken machine and waste bin, the drop-bottom car and the bottom are unloaded hole and are flexibly connected by track, the bottom is unloaded cheat in be equipped with the Two drag conveyors, the discharge end of second drag conveyor extend at the top of waste bin, second drag conveyor with The oscillating feeder overlap joint, the discharge port of the oscillating feeder and the feed inlet of the jaw crusher overlap, the jaw The discharge port of formula crusher is overlapped with the waste bin；

The anti-drop net for preventing personnel from falling is installed at the top of the waste bin；

The spoil bin discharge port external is provided with discharging lock, goes out cash amount convenient for being crushed spoil in control storehouse；

The waste bin uses concrete wall, to reduce the lower slip resistance for being crushed spoil, is flowed out from waste bin convenient for broken spoil；

The belt conveyor selects plate belt conveyor, the belt conveyor to hang on hydraulic pressure branch by telescopic rope Tail boom after frame.

2. a kind of pocket type filling system of control gob floor gushing water according to claim 1, which is characterized in that described Lower hopper is installed above first drag conveyor feed end；

First drag conveyor is fixed on by Retractive leg on mine platform lorry, and drag conveyor posture is conveniently adjusted；

The first drag conveyor discharge end is equipped with discharge bucket.

3. a kind of pocket type filling system of control gob floor gushing water according to claim 1, which is characterized in that described Elevating conveyor is fixed on by Retractive leg on mine platform lorry, and elevating conveyor posture is conveniently adjusted.

4. a kind of pocket type filling system of control gob floor gushing water according to claim 1, which is characterized in that described Device for discharging includes walking sliding rail, sliding block, idler wheel, holder, baffle, engine, fixed plate, shaft coupling, hydraulic cylinder, support leg And push plate, the walking sliding rail are fixedly connected with belt conveyor, the walking sliding rail and the sliding block and the roller-coaster Connection, the sliding block are fixedly connected with the support leg, and the support leg is fixedly connected with the holder, and the idler wheel passes through institute Shaft coupling is stated to be fixedly connected with the engine, the engine is fixedly connected with the fixed plate, the fixed plate with it is described Holder is fixedly connected, and the baffle is fixedly connected with the holder, and the cylinder body of the hydraulic cylinder is fixedly connected with the holder, The push plate is fixedly connected with the piston rod of the hydraulic cylinder；

Strain gauge is installed on the baffle, strain gauge connects the electric control gear for controlling hydraulic cylinder.

5. a kind of placement method of the pocket type filling system of control gob floor gushing water as described in claim 1, main Include the following steps：

A, primary spoil is broken, and primary spoil is transported to downhole gangue Crushing Station with drop-bottom car, is carried out to primary spoil It is broken, and broken spoil is stored in waste bin；

The broken spoil being stored in waste bin is transported to filling operation face by B, primary gangue reprint with shuttle car；

C, primary spoil pack unloads the broken spoil on shuttle car to being installed on above the first drag conveyor feed end In lower hopper, and packed in the first drag conveyor discharge end；

D, bashing；

The step D includes the following steps：

1. adjusting scalable rope, belt conveyor is put to lowest point, and device for discharging is run to working face inclined direction Side；

2. the broken spoil as bag is transported to device for discharging position through elevating conveyor and belt conveyor, device for discharging is certainly It is dynamic that spoil bag is pushed into region to be filled；

3. by discharge mechanism to the distance of one spoil bag width of the other side of working face inclined direction traveling, and this will be transported to The spoil bag of position is automatically pushed to region to be filled；

4. step is repeated 3., until being fills up to the other side of working face inclined direction successively；

5. adjust scalable rope, by belt conveyor be lifted a spoil bag height, then repeatedly step 2. -4.；

6. step is repeated 5., until entire face height is completely filled with spoil bag；

7. hydraulic support is moved forward to the distance of a spoil bag length, then repeatedly step 1. -6., until will be entire mined out All filling finishes in area.