CN220646027U - Goaf drainage system of coal mine stope face - Google Patents

Abstract

The utility model provides a drainage system of a goaf of a coal mine stope face, which comprises: transportation cis-slots; the drainage roadway is arranged between the transportation gate way and the central water pump room at the bottom of the well, and a security coal pillar is arranged between the drainage roadway and the transportation gate way; the water discharging pool is arranged at the tail end of the water discharging roadway, the water discharging pool is arranged close to the side where the security coal pillar is located, and at least one first water pump is arranged in the water discharging pool; the first end of the drainage drilling hole channel is communicated with the tail end of the transportation cis-slot, and the second end of the drainage drilling hole channel is communicated with the water draining pool; a drainage pipeline is arranged in the drainage roadway, a first end of the drainage pipeline is connected with a first water pump, a second end of the drainage pipeline is connected with a second water pump, and the second water pump is used for draining accumulated water to the ground. By using the scheme, accumulated water flowing into the goaf of the stope face can be discharged through the drainage drilling hole channel, the first water pump, the drainage pipeline and the second water pump, so that flood accidents are avoided.

Description

Goaf drainage system of coal mine stope face

Technical Field

The utility model relates to the technical field of coal mine coal mining prevention and control water, in particular to a goaf drainage system of a coal mine stope face.

Background

The method has advanced level in both theoretical research and practical application technology of mine water damage prevention, and can be well applied to mine water damage prevention. However, due to poor management, the water damage prevention measures are not carried out in place, and once a water permeable accident occurs, a large amount of accumulated water is introduced into a mining roadway, even the roadway is developed and prepared, the whole mine is submerged, and main drainage equipment and a power supply system of the mine are paralyzed. How to adopt the rapid and effective method for preventing and controlling the goaf ponding of the stope face, the theoretical research and the targeted technical scheme in the aspect are relatively lagged.

In the technical field of traditional goaf water control of coal face, at present, goaf ponding is generally treated by adopting a comprehensive water control method after geophysical prospecting, drilling follow-up and chemical prospecting break in the industry, meanwhile, a small amount of ponding appearing at the lower corners of the working face is discharged by adopting a drainage pump to ensure safe production of the working face, good use effect is achieved in actual work, but the problems and disadvantages exist in actual application, and the problems and disadvantages are as follows:

(1) In the traditional comprehensive control water treatment method after the geophysical prospecting in advance, the drilling follow-up and the chemical prospecting breaking, when a small amount of accumulated water exists in the part of the overlying rock layer of the working face, the geophysical prospecting is not detected, and the drilling is not timely and effectively covered, a small amount of accumulated water in the part of the overlying rock layer suddenly floods into the working face due to the roof collapse of the working face in the stoping process of the working face, and the accumulated water rushing into the working face suddenly floods into the stoping face from the working face to cause personnel injury and property loss to flood the working face, so that the safety production of the working face is greatly endangered;

(2) In the traditional method for draining water by adopting the drainage pump at the lower corner of the working face, because more electromechanical equipment for transporting the cis-slot is used, the drainage pump, the switch, the cable and the drainage pipeline are difficult to transport and install, and the phenomenon of parallel cross operation exists, so that the safety construction is seriously restricted;

(3) In the traditional method for draining water by adopting a drainage pump at the lower corner of the working surface, when the stope working surface is continuously pushed forward, the drainage pump, the switch, the cable and the drainage pipeline are also continuously moved along with the pushing of the working surface, so that the labor intensity of workers is increased;

(4) The traditional method for draining water by adopting the drainage pump at the lower corner of the working face is limited by the space of the lower corner, the power of the drainage pump cannot be too high, and when the water yield of the lower corner is large, the production safety of the working face is seriously endangered due to the fact that the water inflow is large and the drainage of the drainage pump is not good.

In summary, the problem of preventing and controlling the goaf ponding in the working face stoping process has become a technical problem to be solved urgently, and an effective ending scheme has not been proposed at present.

Disclosure of Invention

The utility model mainly aims to provide a goaf drainage system for a stope working face of a coal mine, which aims to solve the problem of control of goaf ponding in the stope working face stoping process in the prior art.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a goaf drainage system of a coal mine stope face, comprising: transportation cis-slots; the drainage roadway is arranged between the transportation gate way and the central water pump room at the bottom of the well, and a security coal pillar is arranged between the drainage roadway and the transportation gate way; the water discharging pool is arranged at the tail end of the water discharging roadway, the water discharging pool is arranged close to the side where the security coal pillar is located, and at least one first water pump is arranged in the water discharging pool; the first end of the drainage drilling hole channel is communicated with the tail end of the transportation cis-slot, and the second end of the drainage drilling hole channel is communicated with the water draining pool; a drainage pipeline is arranged in the drainage roadway, a first end of the drainage pipeline is connected with a first water pump, a second end of the drainage pipeline is connected with a second water pump, and the second water pump is used for draining accumulated water to the ground.

Further, a first end of the drainage drilling hole channel is arranged on the side wall of the transportation cis-slot, which is close to the security coal pillar, and a second end of the drainage drilling hole channel is arranged above the water draining pool so as to drain accumulated water into the water draining pool.

Further, the number of the first water pumps is two, and at least one first water pump is connected with the drainage pipeline.

Further, the size of the pool was 2.0m×1.5m×2.0m.

Further, a 30m security coal pillar is reserved on the transportation gate way, and then a drainage roadway is constructed.

Further, the diameter of the drain line is set to be the same as the diameter of the drain borehole channel.

Further, the diameter of the drainage pipeline and the diameter of the drainage drilling hole channel are 100mm.

Further, the drainage drilling holes are multiple, and the adjacent drainage drilling holes are equally arranged at intervals.

Further, the number of the drainage drilling holes is three.

Further, the distance between adjacent drainage borehole channels is 10m.

By applying the technical scheme of the utility model, the first water pump, the drainage pipeline and the second water pump in the central water pump room at the bottom of the well are communicated with each other to form the communicating vessel, when accumulated water of the water-bearing layer of the overlying coal seam suddenly floods into the mining space of the stope along with the collapse of the top plate after stope of the working face, the accumulated water of the goaf enters the drainage tank through the drainage drilling hole channel, and is discharged through the first water pump, the drainage pipeline and the second water pump in the central water pump room at the bottom of the well in the drainage tank, so that flood accidents are avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic construction of a first embodiment of a goaf drainage system of a coal mine stope face according to the present utility model;

FIG. 2 shows a schematic structural view of a second embodiment of a goaf drainage system of a coal mine stope face according to the present utility model;

FIG. 3 is a schematic view showing the construction of a third embodiment of a goaf drainage system for a coal mine stope face according to the present utility model;

FIG. 4 is a schematic view showing the construction of a fourth embodiment of a goaf drainage system of a coal mine stope face according to the present utility model;

fig. 5 shows a schematic diagram of a communicator according to the present utility model.

Wherein the above figures include the following reference numerals:

1. transportation cis-slots;

2. drainage roadway; 21. a drainage pipeline;

3. a security coal pillar;

4. a pool is put;

5. and (5) draining the drilled hole.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

Referring to fig. 1 to 4, according to an embodiment of the present application, a goaf drainage system for a coal mine stope face is provided.

The drainage system of the goaf of the coal mine stope face comprises a transportation cis-slot 1, a drainage lane 2, a drainage pool 4 and a drainage drilling hole channel 5, wherein the drainage lane 2 is arranged between the transportation cis-slot 1 and a central water pump room at the bottom of a well, and a security coal pillar 3 is arranged between the drainage lane 2 and the transportation cis-slot 1; the water discharging pool 4 is arranged at the tail end of the drainage roadway 2, the water discharging pool 4 is arranged close to the side where the security coal pillar 3 is located, and at least one first water pump is arranged in the water discharging pool 4; the number of the drainage drilling holes 5 is at least one, the first end of the drainage drilling hole 5 is communicated with the tail end of the transportation cis-trough 1, and the second end of the drainage drilling hole 5 is communicated with the water drainage pool 4; a drainage pipeline 21 is arranged in the drainage roadway 2, a first end of the drainage pipeline 21 is connected with a first water pump, a second end of the drainage pipeline 21 is connected with a second water pump, and the second water pump is used for draining accumulated water to the ground.

By applying the technical scheme of the embodiment, the first water pump in the water discharging pool 4, the water discharging pipeline 21 and the second water pump in the bottom hole central water pump room are communicated with each other to form a communicating vessel, when accumulated water of an overlying coal seam water-bearing layer suddenly floods into a stope working face mining space along with roof collapse after stope working face stope, accumulated water of the goaf enters the water discharging pool 4 through the water discharging drilling hole channel 5, and is discharged through the first water pump in the water discharging pool 4, the water discharging pipeline 21 and the second water pump in the bottom hole central water pump room, so that flood accidents are avoided.

Fig. 5 is a schematic diagram of the communicating vessel, as shown in fig. 5, a certain amount of water is injected into the U-shaped pipe, and the water level 1 and the water level 2 of the water at the two ends of the U-shaped pipe are equal under the action of the atmospheric pressure of the air, namely ρga1=ρgah2, wherein ρ (kg/m 3) is the density of the water, g (9.8N/kg) is the specific gravity of the water, h1 (mm) is the height of the liquid level 1, and h2 (mm) is the height of the liquid level 2.

Further, a first end of the drainage drilling hole channel 5 is arranged on the side wall of the transportation cis-slot 1, which is close to the security coal pillar 3, and a second end of the drainage drilling hole channel 5 is arranged above the water draining pool 4 to drain accumulated water into the water draining pool 4.

In the embodiment of the application, since the cross section of the transportation crossheading 1 is trapezoidal, that is, an included angle is formed between the side wall and the top of the transportation crossheading 1, when the water on the top is flushed out, the drainage drilling hole channel 5 formed in the inclined side wall can drain the water more smoothly. The second end of the drainage drilling hole channel 5 is arranged above the water discharging pool 4, so that the accumulated water can flow more smoothly.

Further, there are two first water pumps, and at least one first water pump is connected to the drain line 21.

Through setting up two first water pumps, one of them first water pump normally works, and another first water pump is as reserve, when the first water pump of work appears unusual, can in time switch to another first water pump and work, guarantees ponding discharge, drainage system's normal operating.

Preferably, the size of the water discharge tank 4 is 2.0m×1.5m×2.0m. The size of the water discharging pool 4 can be adjusted according to actual needs, and the proper water discharging pool 4 is arranged, so that the water discharging of the water discharging system is smooth.

Further, a 30m security coal pillar 3 is reserved on the transportation gateway 1, and then a drainage roadway 2 is constructed. By setting a certain distance of the security coal pillar 3, the coal mining safety can be ensured, and the safety accident can be avoided.

Preferably, the diameter of the drain line 21 is set to be the same as the diameter of the drain borehole channel 5, and the diameter of the drain line 21 and the diameter of the drain borehole channel 5 are both 100mm. The diameter of the drainage pipeline 21 is the same as that of the drainage drilling hole channel 5, so that the accumulated water flows more smoothly, and the water pressure is kept consistent.

Further, the number of the drainage borehole channels 5 is plural, and the adjacent drainage borehole channels 5 are equally spaced.

Preferably, the number of the drainage borehole channels 5 is three, and the distance between adjacent drainage borehole channels 5 is 10m.

It should be noted that the number of the drainage drill holes 5 and the distance between the adjacent drainage drill holes 5 may be modified according to actual needs, for example, two, four, one, etc. drainage drill holes 5 may be provided, and the diameter of the drainage drill holes 5 and the distance between the adjacent drainage drill holes 5 may be modified to obtain an optimal drainage effect.

The application also provides a preferred embodiment of a drainage system of a goaf of a stoping working face of a coal mine, wherein the drainage system takes a 90105 working face as a study object, the 90105 working face adopts a coal mining method of inclined long-wall type backward mining, the drainage system belongs to a face-up mining coal mining mode, the inclination angle of a coal seam of the 90105 working face is 5-8 degrees, and the thickness of the coal seam is 12.5m; the comprehensive mechanized caving coal mining process is adopted, the mining height is 2.7m, the caving coal is 9.8m, and the mining ratio is 1: and 3.6, controlling the top plate by a full collapse method, wherein the length of the working face cut is 220m, the length of the air inlet and return gate is 1300 m. By adopting the drainage system of the goaf of the stope face of the coal mine in the embodiment, accumulated water 67249m3 of the goaf of the stope face of 90105 is discharged altogether so far, the occurrence of flood accidents of the working face is avoided, safe and efficient production of the mine is ensured, and good use effects are achieved.

In particular, as shown in fig. 3 and 4, a 30m security coal pillar is reserved in a 90105 transportation gate, then a drainage gate is constructed, the drainage gate can be used as a track gate of a 90107 working face (as shown in fig. 3, part of the drainage gate is used as a track gate of a 90107 working face), thus the technical problem of continuous tension in mine mining can be relieved, a drainage pool with a length, width and depth of 2.0mx1.5mx2.0m is constructed at one side of the tail end of the drainage gate near the security coal pillar, three drainage drilling tunnels (namely, 1# and 2# in fig. 3 and 4) are respectively constructed from the tail end of the 90105 transportation gate to the upper side of the drainage pool of the drainage gate, two submersible pumps are installed in the drainage pool, one of the drainage gates is used for standby, one end of the drainage gate is connected with the submersible pump in the drainage pool, the other end of the drainage gate is connected with the water pump in a bottom hole center pump room, thus a complete drainage system is formed, when water is accumulated on the working face, and water is discharged from the top of the drainage pool to the mining pool in the mining pool by the 3# and the water pump, and the water is discharged from the mining pool to the bottom of the mining pool by the 3# and the working face, and the water pump is discharged from the mining pool to the mining pool is guaranteed, and the water pump is discharged from the mining pool to the mining pool by the mining pool is in the 3# and the mining pool is high-level, and the mining pool is used, and the water mining pool is discharged from the mining pool is the mining pool and the mining pool is a water mining pool and the mining water and the mining pool is a mining water and the mining water.

The drainage system of the goaf of the coal mine stope face in the embodiment has the following advantages:

1. the goaf ponding can be timely discharged out of the goaf ponding by utilizing the drainage roadway, and the problem that ponding suddenly floods the goaf and the stope face to submerge the face and influence the construction safety caused by the fact that the top plate of the goaf collapses in the prior art is solved;

2. the drainage is carried out through the drainage roadway, so that the drainage work is completely isolated from other work types of construction of the transportation cis-acting groove, the equipment transportation, the installation and the construction are simple, the influence of noise, parallel operation and the like is almost eliminated on the construction site, and the construction safety is ensured. The problems that in the prior art, when drainage is carried out at the lower corner of a working surface by adopting a drainage pump, because electromechanical equipment for transporting a cis-slot is more, the drainage pump, a switch, a cable and a drainage pipeline are difficult to transport and install, and the phenomenon of parallel cross operation exists, so that the safety construction is seriously influenced are solved;

3. the drainage equipment of the drainage roadway does not need to move along with the pushing of the working surface, so that the labor intensity of workers is reduced, and the problems that in the prior art, when the drainage pump is adopted for drainage at the lower corner of the working surface, the drainage pump, the switch, the cable and the drainage pipeline also need to move along with the pushing of the working surface when the stope working surface is pushed forwards continuously and the labor intensity of workers is increased are solved;

4. the power and the quantity of the drainage pump (comprising a water pump in a drainage pool and a water pump in a central water pump room at the bottom of a well) can be increased according to actual needs in a drainage roadway, so that the problem that the drainage pump cannot drain water when the water yield of the lower corner is large due to the limitation of the space of the lower corner when the drainage pump is adopted for drainage at the lower corner of a working surface in the prior art is solved;

5. the drainage roadway can also be used as a track gateway of a 90107 working face, so that the problem of tension in mine excavation connection can be relieved.

In the construction process, the drainage system of the goaf of the coal mine stope face can adopt the following steps:

(1) The drainage capacity of the submersible pump should be checked before the drainage system is constructed, and matched switches, feed, cables, drainage pipelines and the like are selected.

(2) The two submersible pumps must be guaranteed to be in an intact state, and in the drainage process, when one submersible pump fails, the submersible pump can be immediately and automatically switched to the other submersible pump, so that the submersible pump can continuously operate.

(3) And equipment such as the submersible pump, the switch, the cable, the drainage pipeline and the like are regularly checked, so that the drainage system is ensured to be in an intact state.

(4) And the drainage conditions of the drainage drilled hole channels are observed regularly, so that the blockage of the drainage drilled hole channels is prevented, and the normal drainage is influenced.

(5) And the water discharge amount is regularly observed and recorded, so that whether the water discharge system is abnormal or not can be conveniently judged.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the utility model.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A coal mine stope goaf drainage system, comprising:

a transportation gate (1);

the drainage roadway (2) is arranged between the transportation cis-trough (1) and a central water pump house at the bottom of the well, a security coal pillar (3) is arranged between the drainage roadway (2) and the transportation cis-trough (1), and a second water pump is arranged in the central water pump house at the bottom of the well;

the water discharging pool (4) is arranged at the tail end of the water discharging roadway (2), the water discharging pool (4) is arranged close to the side where the security coal pillar (3) is located, and at least one first water pump is arranged in the water discharging pool (4);

the drainage drilling hole channel (5), at least one drainage drilling hole channel (5) is arranged, a first end of the drainage drilling hole channel (5) is communicated with the tail end of the transportation gate way (1), and a second end of the drainage drilling hole channel (5) is communicated with the water drainage pool (4);

the drainage roadway (2) is internally provided with a drainage pipeline (21), a first end of the drainage pipeline (21) is connected with the first water pump, a second end of the drainage pipeline (21) is connected with the second water pump, and the second water pump is used for draining accumulated water to the ground.

2. The drainage system of the goaf of the coal mining face according to claim 1, wherein a first end of the drainage drilling hole channel (5) is arranged on the side wall of the transportation cis trough (1) close to the security coal pillar (3), and a second end of the drainage drilling hole channel (5) is arranged above the water drainage pool (4) so as to drain accumulated water into the water drainage pool (4).

3. The goaf drainage system of a coal mining face according to claim 1, wherein the number of first water pumps is two, and at least one first water pump is connected with the drainage pipeline (21).

4. The goaf drainage system of a coal mine stope face according to claim 1, wherein the size of the drainage basin (4) is 2.0m×1.5m×2.0m.

5. The drainage system of goaf of coal mining face according to claim 1, characterized in that the drainage roadway (2) is constructed after the security coal pillar (3) of 30m is reserved in the transportation gateway (1).

6. A coal mine stope goaf drainage system according to claim 1 wherein the diameter of the drainage pipeline (21) is the same as the diameter of the drainage borehole channel (5).

7. The drainage system of the goaf of the coal mining face according to claim 1, characterized in that the diameter of the drainage pipeline (21) and the diameter of the drainage drilling hole channel (5) are 100mm.

8. A goaf drainage system for a coal mine stope face according to claim 1, wherein the drainage borehole channels (5) are plural, and adjacent drainage borehole channels (5) are arranged at equal intervals.

9. A coal mine stope goaf drainage system according to claim 1 wherein the number of drainage borehole channels (5) is three.

10. A coal mine stope goaf drainage system according to claim 8 or 9 wherein the distance between adjacent drainage borehole channels (5) is 10m.