Composite equipment for underground synergistic filling of high-salt water and coal gangue in coal mines

Abstract

The present invention belongs to the field of high-salt wastewater treatment equipment, and proposes a composite equipment for underground collaborative filling of high-salt water and coal gangue in coal mines, including a high-salt water purification center, a coal gangue crushing center, an underground gangue bin, a support system and a conveyor belt. A part of the high-salt water of the underground mining equipment is stored in the gap area of ​​the caving belt, and the other part of the high-salt water and the sewage in the sewage collection tank are transported to the underground gangue bin. An eccentric funnel is arranged inside the underground gangue bin, and the end of the eccentric funnel faces the eccentric position of the bottom bin and is provided with a flange ring and a plurality of support rods. The support rods enclose a material drop area and three stirring devices distributed around the material drop area are arranged on the side of the material drop area. A spiral feeder and a discharge nozzle are arranged on one side of the bottom bin, and the discharge nozzle faces the conveyor belt. The present invention can realize the use of circulating water and achieve the purpose of zero discharge. It is reasonably designed, conducive to accelerating the updating of new and old processes, promoting green mining, and conducive to improving the ecological safety and ecological restoration of coal mines.

Description

Technical Field

[0001] The invention belongs to the field of high-salt wastewater treatment equipment, and in particular relates to a composite equipment for underground coordinated filling of high-salt water and coal gangue in coal mines. Background Art

[0002] As the main energy source in my country, coal plays an extremely important role in social and economic development. The development and utilization of coal not only plays a huge role in promoting social economy, but also has a significant impact on the environment. For example, high-salt wastewater from coal mines is wastewater from coal mining and ground industrial production. Due to its complex and diverse composition and high salt content, it has a strong inhibitory effect on microbial growth. Therefore, the technical difficulty of this wastewater treatment is much greater than that of ordinary sewage treatment. In addition, coal gangue is solid waste discharged during the excavation, mining and washing of coal. Coal gangue is abandoned and occupies a large area of ​​land. The escape or leaching of sulfides in coal gangue will pollute the atmosphere, farmland and water bodies. Gangue mountains will also spontaneously combust and cause fires, or collapse in the rainy season, silting up rivers and causing disasters. Now, a large amount of coal gangue is crushed and then filled into the goaf of coal mines, which can effectively solve the problem of large-scale accumulation and abandonment of coal gangue.

[0003] At present, the research progress of deep underground treatment and reuse of high-salt wastewater from coal mines has adopted the method of coordinated filling of coal gangue, that is, the underground coordinated filling process of high-salt water + coal gangue, which can solve the technical and process problems of reducing large amounts of industrial solid waste coal gangue and high-salt coal mine wastewater concentrate in mines. However, the problem with the new treatment process is that if all the underground high-salt water is extracted and brought to the ground for treatment, although the volume of recovered water can be increased, the processing workload of the ground equipment is also increased, and if it is finally formed into a paste-like body with coal gangue powder, new water needs to be added, which will increase the treatment cost of the high-salt water; furthermore, most coal mines currently use coal gangue to fill the goaf of coal mines, such as the patent CN110454219B discloses an automatic underground filling device and method for full-volume coal gangue and the patent CN218190196U discloses a coal gangue crushing and transportation device. If the high-salt wastewater and coal gangue are mixed and treated on the ground, the original underground gangue bin is abandoned, and even the original conveyor belt will be abandoned, so the cost of updating the old process to the new process will increase significantly, and the cost recovery cycle and process cycle are relatively long, which is not conducive to accelerating the transition of coal mines to green mining. Summary of the invention

[0004] In response to the above-mentioned technical problems regarding the treatment of high-salt water in coal mines during filling of coal mine goafs, the present invention proposes a composite equipment for underground collaborative filling of high-salt water and coal gangue in coal mines, which has a reasonable design, is conducive to accelerating the updating of new and old processes, promoting green mining, and is conducive to improving the ecological safety and ecological restoration of coal mines.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the coal mine high-salt water and coal gangue underground collaborative filling composite equipment provided by the present invention includes a high-salt water purification center, a coal gangue crushing center and an underground gangue bin, the underground gangue bin includes a top bin, an intermediate bin and a bottom bin, the top of the top bin is provided with a material receiving port, the caliber of the bottom bin is larger than the caliber of the intermediate bin and a support system is provided on its material output side, a conveyor belt for conveying materials to the goaf is provided on the supporting surface of the support system, and is characterized in that the high-salt water purification center includes a magnetic separation unit, a precision filtration unit, an ultrafiltration unit, a reverse osmosis unit and a sewage collection tank distributed according to the high-salt water treatment direction, the magnetic separation unit is used to treat high-salt water produced by ground industrial equipment and part of the high-salt water produced by underground mining equipment, and other high-salt water of the underground mining equipment A part of it is stored in the gap area of ​​the caving zone through an underground water storage pipe, and the other part of the underground mining equipment, high-salt water and sewage in the sewage collection tank are transported to the underground gangue bin through underground recovery pipes and reuse pipes respectively. An eccentric funnel connected with the middle bin is arranged inside the underground gangue bin, and the end of the eccentric funnel faces the eccentric position of the bottom bin and is provided with a flange ring, and a plurality of support rods matched with the bottom bin support are arranged on the flange ring, the support rods form a drop area and three stirring devices distributed around it are arranged on the side of the drop area, the bottom bin is provided with an output port at a position opposite to the drop area, an output seat is arranged at the output port, a pipe seat obliquely connected with the output seat is arranged on the top of the output seat, a spiral lifting machine is arranged inside the pipe seat, and a discharge nozzle is arranged on the side of the pipe seat, and the discharge nozzle faces the conveyor belt.

[0006] Preferably, the top surface of the top bin is a curved surface and its four sides are vertical planes, and the top bin is provided with at least one pair of whipping stones in the diagonal direction of its bottom, and the whipping stone comprises a whipping stone motor located outside the top bin, and the output shaft of the whipping stone motor extends into the interior of the top bin, and the whipping stone also comprises a rotating joint seat located inside the top bin and transmission-connected to the whipping stone, and the rotating joint seat is transmission-connected with a whip rope, and the whip rope bends upward and extends from the top bin to the interior of the middle bin.

[0007] Preferably, the rotating joint seat is a double-conical structure and includes an upper cone and a lower cone, the outer sides of the upper cone and the lower cone are provided with heat sinks evenly distributed along their circumference, the interior of the rotating joint seat is provided with a second-order countersunk hole, the bottom of the second-order countersunk hole is provided with a T-shaped connecting shaft, the T-shaped connecting shaft is connected to the output shaft of the motor and is connected through a transmission bolt, the T-shaped connecting shaft is provided with a flange bolt connected to the second-order countersunk hole, a bearing sleeve is provided above the T-shaped connecting shaft, a retaining ring is provided inside the bearing sleeve, a core shaft is provided at the head end of the whip rope, a plugging plate is nested on the core shaft, the plugging plate is connected to the top of the second-order countersunk hole by a positioning bolt, and a plurality of groups of axially distributed ball grooves are provided on the side of the core shaft, rollers are provided in the ball grooves, and the rollers roll with the curved holes provided on the retaining ring.

[0008] Preferably, the whip rope gradually tapers from its head end to its tail end, and the side surface of the whip rope is provided with circular ridges evenly distributed along the generatrix direction thereof.

[0009] Preferably, a pair of semi-annular ingredient jackets are provided on the outer side of the intermediate bin, at least two connecting nozzles are provided on the ingredient jackets, a connecting pipe connected to the bottom bin is provided at the bottom of the ingredient jackets, an ingredient delivery pipe is provided at the end of the connecting pipe, the interior of one ingredient jacket is a sewage chamber, and the interior of the other ingredient jacket is an additive chamber.

[0010] Preferably, the three stirring devices are respectively a roller stirring device and two spiral stirring devices, the roller stirring devices are distributed close to the output port, and the interior of the bottom bin is provided with a mounting plate distributed close to the eccentric funnel and used to install the stirring device.

[0011] Preferably, the roller-cutter stirring device includes a roller-cutter motor, a roller-cutter shaft is provided at the power output end of the roller-cutter motor, a plurality of roller-cutter mechanisms are provided on the roller-cutter shaft, the roller-cutter mechanism includes a cutter ring, spiral cutter teeth are provided on the outer side of the cutter ring, and bevel teeth distributed along the spiral trajectory are provided on the edge of the spiral cutter teeth, a pair of hollow cutter seats with upper and lower butt joints and a cylindrical structure are provided inside the cutter ring, a locking sleeve connected to the roller-cutter shaft is provided at the center of the hollow cutter seat, and the two end edges of the hollow cutter seat are limitedly matched with the end of the cutter ring.

[0012] Preferably, the spiral stirring device comprises a stirring motor, a stirring shaft is provided at the power output end of the stirring motor, a spiral blade is provided on the stirring shaft, and the spiral radius of the spiral blade gradually decreases from bottom to top.

[0013] Preferably, the bottom bin is provided with a material guide cone at a position opposite to the end of the eccentric funnel, and a base connected to the support rod is provided at the bottom of the material guide cone.

[0014] Preferably, a portion of the liquid in the sewage collection tank is injected into the underground porous rock voids at a depth of 500m to 3500m below the earth's surface through an injection pump.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] 1. The composite equipment for underground coordinated filling of coal mine high-salt water and coal gangue provided by the present invention can realize the recycling of water and achieve the purpose of zero emission by reasonably distributing the high-salt water produced by ground industrial equipment and the high-salt water produced by underground mining equipment to the high-salt water purification center, the caving gap area and the underground gangue bin.

[0017] 2. The composite equipment for underground coordinated filling of high-salt water and coal gangue in coal mines provided by the present invention has an underground gangue bin which is transformed on site. The crushed gangue material can be mixed with the purified wastewater and part of the original wastewater underground to achieve underground coordinated filling, which is beneficial to reducing the treatment load of surface sewage and the volume of new water replenishment, and has a high utilization rate of the original equipment, which is beneficial to reducing the cost of updating old and new processes. It is reasonably designed, conducive to accelerating the updating of old and new processes, promoting green mining, and improving the ecological safety and ecological restoration of coal mines, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of a composite equipment for underground coordinated filling of high-salt water and coal gangue in coal mines;

[0020] Figure 2 An axonometric view of an underground gangue bin provided in an embodiment;

[0021] Figure 3 A side view of an underground gangue bin provided in an embodiment;

[0022] Figure 4 A cross-sectional view of an underground gangue bin in the DD direction provided in an embodiment;

[0023] Figure 5 An axonometric diagram of the internal structure of an underground gangue bin provided in an embodiment;

[0024] Figure 6 A front view of the internal structure of an underground gangue bin provided in an embodiment;

[0025] Figure 7 A cross-sectional view of a hob mechanism provided in an embodiment;

[0026] Figure 8 A cross-sectional view of a rotary joint seat provided in an embodiment;

[0027] Fig. 9 An axonometric view of a whip stone provided for an embodiment;

[0028] Fig.10 An axonometric view of a mounting plate provided for an embodiment;

[0029] In the above figures, 1, high-salt water purification center; 1a, magnetic separation unit; 1b, precision filtration unit; 1c, ultrafiltration unit; 1d, reverse osmosis unit; 1e, sewage collection tank; 2, coal gangue crushing center; 3, underground gangue bin; 31, top bin; 32, middle bin; 33, bottom bin; 34, material receiving port; 35, eccentric funnel; 36, flange ring; 37, support rod; 38, output seat; 39, pipe seat; 310, discharge nozzle; 4, support system; 5, conveyor belt; 6, underground water storage pipeline; 7, underground recovery pipeline; 8, reuse pipeline; 9, stirring device; 91, hob stirring device; 911, hob motor; 912, hob shaft; 913, hob mechanism; 913a, knife ring; 913b, spiral knife teeth; 913c, bevel gear; 913d, hollow knife seat; 913e, locking sleeve; 92, spiral stirring device; 921, stirring motor; 922, stirring shaft; 923, spiral blade; 10, spiral feeder; 11, whip stone device; 111, whip stone motor; 112, rotating joint seat; 112a, upper cone; 112b, lower cone; 112c, heat sink; 112d, T-type connecting shaft; 112e, bearing sleeve; 112f, retaining ring; 112g, roller; 113, whip rope; 113a, core shaft; 113b, circular ridge; 114, blocking plate; 12, ingredient jacket; 121, connecting nozzle; 122, connecting pipe; 123, ingredient conveying pipe; 13, mounting plate; 14, guide cone; 15, base. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0032] Examples, such as Figures 1 to 10 As shown, the underground coordinated filling composite equipment of high-salt water and coal gangue provided by the present invention comprises a high-salt water purification center 1, a coal gangue crushing center 2 and an underground gangue bin 3, wherein the underground gangue bin 3 comprises a top bin 31, an intermediate bin 32 and a bottom bin 33, wherein a material receiving port 34 is arranged at the top of the top bin 31, the caliber of the bottom bin 33 is larger than the caliber of the intermediate bin 32 and a support system 4 is arranged at its material output side, and a conveyor belt 5 for conveying materials to the goaf is arranged on the supporting surface of the support system 4. Among them, the conveyor belt 5 adopts a conveyor belt 5 for conveying paste; the underground gangue bin 3 is located underground and at the traffic position of the tunnel and mining, and is used to convey gangue and mixed filling materials of high-salt water and gangue.

[0033] On this basis, in order to improve the green treatment efficiency of high-salt water in coal mines, the high-salt water purification center 1 provided by the present invention includes a magnetic separation unit 1a, a precision filtration unit 1b, an ultrafiltration unit 1c, a reverse osmosis unit 1d and a sewage collection tank 1e distributed according to the high-salt water treatment direction. The precision filtration unit 1b can adopt a rotary drum filter and a filter cloth filter tank. The magnetic separation unit 1a is used to treat high-salt water produced by ground industrial equipment and part of the high-salt water produced by underground mining equipment. A part of the other high-salt water of the underground mining equipment is stored in the gap area of ​​the caving zone through an underground water storage pipeline. The other part of the high-salt water of the underground mining equipment and the sewage in the sewage collection tank 1e are respectively transported to the underground gangue bin 3 through underground recovery pipelines and reuse pipelines. In this way, all the high-salt water produced by the ground industrial equipment enters the high-salt water purification center 1 for pretreatment and deep treatment, and the high-salt water pumped up from the underground also enters the high-salt water purification center 1 for treatment, wherein the process section where the magnetic separation unit 1a and the precision filtration unit 1b are located is the pretreatment process, and the process section where the ultrafiltration unit 1c and the reverse osmosis unit 1d are located is the deep treatment process, and the treated clean water enters the recycling system, and the treated sewage enters the sewage collection tank 1e for standby. For other high-salt water produced by underground mining equipment, part of it is directly transported to the underground gangue bin 3, and the other part is stored in the gap area of ​​the caving zone. The high-salt water stored in the gap area of ​​the caving zone adopts a space sealing process, and the water storage space is formed by the mined working face and the caving zone. The porosity of the caving zone formed by the collapse of the upper part of each working face after the coal seam is mined is about 0.25-0.3. This space is used as a high-salt water / concentrated brine storage space, and the storage capacity can be adjusted by setting the water level of the water storage. The high-salt water entering the underground gangue bin 3 and the sewage from the sewage collection tank 1e are mixed with the crushed gangue in a certain proportion to form a paste-like filling material. Filling the filling material into the goaf can achieve the purpose of zero discharge. Since other high-salt water produced by underground mining equipment has a certain amount of water, directly reusing it can reduce the treatment load of surface sewage and the volume of new water replenishment, which is conducive to reducing process costs and shortening process cycles. In this way, the present invention can implement the "magnetic separation + precision filtration + ultrafiltration + reverse osmosis + constant pressure water supply" process, which has the characteristics of low operating cost and strong reliability, so that the water quality of the effluent meets the requirements of high-pressure spraying, emulsified oil water distribution and underground fire sprinkler water quality of underground comprehensive mining and excavation equipment; furthermore, by reasonably allocating the high-salt water produced by ground industrial equipment and underground mining equipment to the high-salt water purification center 1, the gap area and the underground gangue bin 3, it can achieve both circulating water utilization and zero discharge.

[0034] Furthermore, in order to promote the updating of old and new processes, the present invention performs on-site transformation of the underground gangue bin 3 according to the process characteristics of high-salt water and coal gangue system treatment. Specifically, the present invention provides an eccentric funnel 35 connected with the middle bin 32 inside the underground gangue bin 3, the end of the eccentric funnel 35 faces the eccentric position of the bottom bin 33 and is provided with a flange ring 36, and the flange ring 36 is provided with a plurality of support rods 37 supporting and cooperating with the bottom bin 33, the support rods 37 enclose a material drop zone and three stirring devices 9 distributed around the bottom bin 33 are provided on the side of the material drop zone, the bottom bin 33 is provided with an output port at a position opposite to the material drop zone, an output seat 38 is provided at the output port, a pipe seat 39 obliquely connected thereto is provided on the top of the output seat 38, a spiral lifting machine 10 is provided inside the pipe seat 39, and a discharge nozzle 310 is provided on the side of the pipe seat 39, and the discharge nozzle 310 faces the conveyor belt 5. The underground gangue bin 3 provided by the present invention is transformed on site. First, the original discharge port is connected with an eccentric funnel 35, so that the crushed gangue is discharged along the discharge channel provided by the eccentric funnel 35. The discharge area connected with the discharge channel is surrounded by three stirring devices 9 to stir and mix the sewage and the gangue materials. In addition to the sewage and the gangue materials, some additives such as cementing materials are also prepared so that the mixed materials can be effectively condensed after filling. Furthermore, an output port is opened at the bottom bin 33, and the mixed materials can be lifted to the conveyor belt 5 by a screw lifter 10, so that the conveyor belt 5 can transport the mixed materials to the goaf of the underground mine. In this way, the underground gangue bin 3 after on-site transformation can be put into the new process, and the process operation of mixing materials on the ground can be reduced, and the mixing operation can be transferred to the underground, thereby completing the underground collaborative filling operation. The utilization rate of the original equipment is high, which is beneficial to reducing the cost of updating the old and new processes. The design is reasonable, which is beneficial to accelerate the updating of the old and new processes, promote green mining and improve the ecological safety and ecological restoration of coal mines.

[0035] In order to improve the structural strength of the underground waste rock bin 3, the top surface of the top bin 31 provided by the present invention is a curved surface and its four sides are vertical planes, and the cross section of the underground waste rock bin 3 can resist the pressure from top to bottom.

[0036] Furthermore, in order to improve the circulation efficiency of the gangue material in the underground gangue bin 3, the present invention sets a bionic conveying device, i.e., a whipping stone 11, in the underground gangue bin 3. In order to improve the spatial coordination performance of the whipping stone 11, the present invention sets two whipping stone 11 at the diagonal position of the top bin 31, and the top bin 31 is provided with at least one pair of whipping stone 11 in the diagonal direction of its bottom. Specifically, the whipping stone 11 includes a whipping stone motor 111 located outside the top bin 31, and the output shaft of the whipping stone motor 111 extends into the interior of the top bin 31. The whipping stone 11 also includes a rotating joint seat 112 located inside the top bin 31 and connected to the whipping stone 11 in transmission. The rotating joint seat 112 is connected to a whipping rope 113 in transmission, and the whipping rope 113 is bent upward and extends from the top bin 31 to the interior of the middle bin 32. Among them, the whip stone motor 111 provides rotational power to the rotating joint seat 112. While the rotating joint seat 112 drives the whip rope 113 to rotate, the whip rope 113 can perform universal movements and stir the gangue materials in the intermediate bin 32 with its bionic characteristics, so that the gangue materials can have an isolation gap and have a tendency to move downward, thereby avoiding blockage of materials in the intermediate bin 32.

[0037] In order to improve the stirring performance of the whip stone 11 on coal gangue, the rotating joint seat 112 provided by the present invention is a double-conical structure and includes an upper cone 112a and a lower cone 112b. The outer sides of the upper cone 112a and the lower cone 112b are provided with heat sinks 112c evenly distributed along their circumference direction. The interior of the rotating joint seat 112 is provided with a second-order countersunk hole, and a T-shaped connecting shaft 112d is provided at the bottom of the second-order countersunk hole. The T-shaped connecting shaft 112d is connected to the output shaft of the motor and is connected through a transmission bolt. A flange bolt connected to the second-order countersunk hole is provided, a bearing sleeve 112e is provided above the T-shaped connecting shaft 112d, a retaining ring 112f is provided inside the bearing sleeve 112e, a core shaft 113a is provided at the head end of the whip rope 113, a plugging plate 114 is nested on the core shaft 113a, the plugging plate 114 is connected to the top of the second-order countersunk hole by positioning bolts, a plurality of groups of axially distributed ball grooves are provided on the side of the core shaft 113a, rollers 112g are provided in the ball grooves, and the rollers 112g are rollingly matched with the curved surface holes provided on the retaining ring 112f. Among them, the rotating joint seat 112 serves as the transmission connection structure between the whip stone motor 111 and the whip rope 113. The T-shaped connecting shaft 112d and the transmission bolt are used to ensure the reliability of its connection with the output shaft of the whip stone motor 111, and the lower cone 112b provides a stable rotation base plane, so that the rotation of the rotating joint seat 112 itself has a certain stability; the head of the whip rope 113 is connected to the retaining ring 112f and the bearing sleeve 112e by the core shaft 113a, and is prevented from separating from the rotating joint seat 112 by the roller 112g and the blocking plate 114, and the roller 112g provides a flexible rotating working surface. Filling some grease between the working surfaces of the roller 112g, the retaining ring 112f and the bearing sleeve 112e can ensure the rotation flexibility of the whip rope 113. In this way, the rotating joint seat 112 can establish a stable and reliable transmission connection relationship between the whip motor 111 and the whip rope 113, and enable the whip rope 113 to better complete universal movement after being driven by power, thereby improving its stirring effect on the coal gangue material in the underground gangue bin 3 and promoting the circulation of coal gangue material.

[0038] In order to improve the utilization rate of the whip rope 113, the whip rope 113 provided by the present invention gradually becomes thinner from its head end to its tail end, and the side of the whip rope 113 is provided with circular ridges 113b evenly distributed along its generatrix direction, so that the contact area between the main body of the whip rope 113 and the coal gangue is gradually reduced, and the part away from the head end of the whip rope 113 does not need too much torque to complete the corresponding movement, thereby realizing the whipping of the material. Regarding the circular ridges 113b on the whip rope 113, this structure can further crush the coal gangue material to a certain extent, improve the quality of the coal gangue entering the bottom bin 33, and is conducive to improving the mixing effect of the mixed material and the quality of the subsequent filling of the goaf.

[0039] In order to facilitate the access to high-salt water and cementing materials, for the on-site transformation design of the underground gangue bin 3, the present invention is provided with a pair of semi-circular ingredient jackets 12 on the outside of the intermediate bin 32, and at least two connecting nozzles 121 are provided on the ingredient jacket 12. The bottom of the ingredient jacket 12 is provided with a connecting pipe 122 connected to the bottom bin 33, and the end of the connecting pipe 122 is provided with an ingredient delivery pipe 123, wherein the interior of one ingredient jacket 12 is a sewage chamber, and the interior of the other ingredient jacket 12 is an additive chamber. In this way, by using the ingredient jacket 12, high-salt wastewater and cementing materials can be effectively and reasonably delivered to the bottom bin 33, so that all filling materials can be mixed in the bottom bin 33. The design of the ingredient jacket 12 provides a connecting nozzle 121, a connecting pipe 122 and an ingredient delivery pipe 123, and only a hole needs to be opened on the underground gangue bin 3. For the sake of sealing, a sealing structure can be installed in a targeted manner at the position where sealing is required.

[0040] In order to improve the mixing quality of the filling raw materials, the three stirring devices 9 provided by the present invention are respectively a roller stirring device 91 and two spiral stirring devices 92. The roller stirring device 91 is distributed in the direction close to the output port. The roller stirring device 91 close to the output port can increase the probability of the material contacting it, and improve its stirring effect and crushing effect on the filling raw materials. The interior of the bottom bin 33 is provided with a mounting plate 13 distributed close to the eccentric funnel 35 and used to install the stirring device 9. The mounting plate 13 adopts a hollow structure, which is convenient for extending the end of the ingredient conveying pipe 123 into the stirring range of the stirring device 9, and can also establish a certain assembly relationship with the eccentric funnel 35, thereby improving the stability of the internal structure of the device.

[0041] Furthermore, the hob stirring device 91 includes a hob motor 911, a hob shaft 912 is provided at the power output end of the hob motor 911, a plurality of hob mechanisms 913 are provided on the hob shaft 912, the hob mechanism 913 includes a knife ring 913a, spiral knife teeth 913b are provided on the outer side of the knife ring 913a, and bevel teeth 913c distributed along the spiral trajectory are provided on the edge of the spiral knife teeth 913b, and a pair of hollow knife seats 913d with upper and lower butt joints and a cylindrical structure are provided inside the knife ring 913a, and a locking sleeve 913e connected to the hob shaft 912 is provided at the center of the hollow knife seat 913d, and the locking sleeve 913e and the hob shaft 912 can be threadedly connected or screwed, and the two end edges of the hollow knife seat 913d are limitedly matched with the end of the knife ring 913a. The cutter mechanism 913 can be modified with scrapped cutters of the excavation equipment, such as expanding a hole in the middle of the cutter ring 913a to install the hollow cutter seat 913d, which is conducive to controlling the cost of the original parts. The cutter motor 911 drives the cutter shaft 912 to make all the cutter mechanisms 913 rotate synchronously. During the rotation, it can stir and crush large pieces of coal gangue, and its spiral stirring feature can increase the span of material movement and improve the mixing quality of materials.

[0042] In order to improve the stirring performance of the spiral stirring device 92, the spiral stirring device 92 provided by the present invention includes a stirring motor 921, a stirring shaft 922 is provided at the power output end of the stirring motor 921, and a spiral blade 923 is provided on the stirring shaft 922. The spiral stirring device 92 improves the activity performance of the material in the space of the bottom bin 33 by means of spiral stirring, and promotes the mixing of the material. At the same time, considering that the gap between the support rods 37 is large, the coal gangue coming from top to bottom will directly press on the upper part of the spiral blade 923, and the upper material has stronger mobility during the spiral stirring process, so the spiral radius of the coal gangue spiral blade 923 designed by the present invention gradually decreases from bottom to top, which can not only improve the activity of the lower material, but also reduce the damage of the coal gangue to the upper part of the spiral blade 923, which is conducive to extending the service life of the spiral stirring device 92 and improving the utilization rate of the device.

[0043] In order to improve the flow effect of materials into the working range of the stirring device 9, the bottom bin 33 provided by the present invention is provided with a material guide cone 14 at a position relative to the end of the eccentric funnel 35, and the bottom of the material guide cone 14 is provided with a base 15 connected to the support rod 37. The material guide cone 14 is used to promote the radiation of materials to the surroundings, and the base 15 can provide a stable support foundation for the material guide cone and the support rod 37 at the same time.

[0044] In order to improve the efficiency of sewage treatment, the present invention can also inject part of the liquid in the sewage collection tank 1e into the underground porous rock voids 500m to 3500m below the earth's surface through an injection pump. Filling the porous rock voids can enrich the underground structure and will not affect the underground geology.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A composite equipment for underground coordinated filling of high-salt water and coal gangue in coal mines, comprising a high-salt water purification center, a coal gangue crushing center and an underground gangue bin, wherein the underground gangue bin comprises a top bin, an intermediate bin and a bottom bin, wherein a material receiving port is arranged at the top of the top bin, the caliber of the bottom bin is larger than that of the intermediate bin and a support system is arranged at the material output side thereof, a conveyor belt for conveying materials to the goaf is arranged on the support surface of the support system, and the characteristics are as follows: The high-salt water purification center includes a magnetic separation unit, a precision filtration unit, an ultrafiltration unit, a reverse osmosis unit and a sewage collection tank distributed in the direction of high-salt water treatment. The magnetic separation unit is used to treat high-salt water produced by ground industrial equipment and part of high-salt water produced by underground mining equipment. A part of the other high-salt water of the underground mining equipment is stored in the gap area of ​​the caving zone through an underground water storage pipeline. Another part of the high-salt water of the underground mining equipment and the sewage in the sewage collection tank are transported to the underground gangue bin through underground recovery pipelines and reuse pipelines respectively. The interior of the underground gangue bin is arranged There is an eccentric funnel connected with the middle bin, the end of the eccentric funnel is facing the eccentric position of the bottom bin and is provided with a flange ring, the flange ring is provided with a plurality of support rods that cooperate with the bottom bin support, the support rods form a material drop area and three stirring devices distributed around the material drop area are provided on the side of the material drop area, the bottom bin is provided with an output port at a position opposite to the material drop area, the output port is provided with an output seat, the top of the output seat is provided with a pipe seat obliquely connected thereto, a spiral lifting machine is provided inside the pipe seat, a discharge nozzle is provided on the side of the pipe seat, and the discharge nozzle faces the conveyor belt.

2. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 1 is characterized in that: The top surface of the top bin is a curved surface and its four sides are vertical planes. The top bin is provided with at least one pair of whipping stones in the diagonal direction of its bottom. The whipping stone comprises a whipping stone motor located outside the top bin, and the output shaft of the whipping stone motor extends into the interior of the top bin. The whipping stone also comprises a rotating joint seat located inside the top bin and transmission-connected to the whipping stone. A whip rope is transmission-connected to the rotating joint seat, and the whip rope bends upward and extends from the top bin to the interior of the middle bin.

3. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 2 is characterized in that: The rotating joint seat is a double-conical structure and includes an upper cone and a lower cone. The outer sides of the upper cone and the lower cone are provided with heat sinks evenly distributed along the circumference direction thereof. A second-order countersunk hole is provided inside the rotating joint seat. A T-shaped connecting shaft is provided at the bottom of the second-order countersunk hole. The T-shaped connecting shaft is docked with the output shaft of the motor and is connected through a transmission bolt. A flange bolt connected to the second-order countersunk hole is provided on the T-shaped connecting shaft. A bearing sleeve is provided above the T-shaped connecting shaft. A retaining ring is provided inside the bearing sleeve. A core shaft is provided at the head end of the whip rope. A blocking plate is nested on the core shaft. The blocking plate is connected to the top of the second-order countersunk hole through a positioning bolt. A plurality of groups of axially distributed ball grooves are provided on the side of the core shaft. Rollers are provided in the ball grooves. The rollers roll with the curved holes provided on the retaining ring.

4. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 3 is characterized in that: The whip rope gradually becomes thinner from its head end to its tail end, and the side surface of the whip rope is provided with circular ridges and protrusions evenly distributed along the generatrix direction.

5. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 1 is characterized in that: A pair of semi-circular ingredient jackets are arranged on the outside of the middle bin, at least two connecting nozzles are arranged on the ingredient jackets, a connecting pipe connected to the bottom bin is arranged at the bottom of the ingredient jackets, and an ingredient conveying pipe is arranged at the end of the connecting pipe, the interior of one ingredient jacket is a sewage chamber, and the interior of the other ingredient jacket is an additive chamber.

6. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 1 is characterized in that: The three stirring devices are respectively a roller stirring device and two spiral stirring devices. The roller stirring devices are distributed close to the output port. The interior of the bottom bin is provided with a mounting plate distributed close to the eccentric funnel and used to install the stirring device.

7. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 6 is characterized in that: The roller-cutter stirring device includes a roller-cutter motor, a roller-cutter shaft is provided at the power output end of the roller-cutter motor, a plurality of roller-cutter mechanisms are provided on the roller-cutter shaft, the roller-cutter mechanism includes a cutter ring, spiral cutter teeth are provided on the outer side of the cutter ring, and bevel teeth distributed along the spiral trajectory are provided on the edge of the spiral cutter teeth. A pair of hollow cutter seats with upper and lower butt joints and a cylindrical structure are provided inside the cutter ring, a locking sleeve connected to the roller-cutter shaft is provided at the center of the hollow cutter seat, and the two end edges of the hollow cutter seat are limitedly matched with the end of the cutter ring.

8. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 7 is characterized in that: The spiral stirring device comprises a stirring motor, a stirring shaft is arranged at the power output end of the stirring motor, a spiral blade is arranged on the stirring shaft, and the spiral radius of the spiral blade gradually decreases from bottom to top.

9. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 1 is characterized in that: The bottom bin is provided with a material guide cone at a position opposite to the end of the eccentric funnel, and the bottom of the material guide cone is provided with a base connected with the support rod.

10. The underground coordinated filling composite equipment of coal mine high-salt water and coal gangue according to claim 1 is characterized in that: A portion of the liquid in the sewage collection tank is injected into the porous rock voids at a depth of 500m to 3500m below the earth's surface through an injection pump.

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