CN111485945A - Automatic negative pressure water drainage device based on steep inclined super-thick coal seam horizontal sublevel mining - Google Patents
Automatic negative pressure water drainage device based on steep inclined super-thick coal seam horizontal sublevel mining Download PDFInfo
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- CN111485945A CN111485945A CN202010470219.3A CN202010470219A CN111485945A CN 111485945 A CN111485945 A CN 111485945A CN 202010470219 A CN202010470219 A CN 202010470219A CN 111485945 A CN111485945 A CN 111485945A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 239000003245 coal Substances 0.000 title claims abstract description 42
- 238000005065 mining Methods 0.000 title claims abstract description 34
- 238000000605 extraction Methods 0.000 claims abstract description 67
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses an automatic negative pressure water drainage device based on horizontal sublevel mining of a steeply inclined super-thick coal seam, which comprises a water container arranged on a lower roadway and a water guide pipe connected to an extraction pipeline positioned in an upper roadway and used for guiding accumulated water in the extraction pipeline to the water container. The water drainage device has the advantages that the existing roadway arrangement and the mutual position relation are fully utilized, the problem of water accumulation of a steeply inclined coal seam horizontal subsection mining and gas extraction mine in a negative pressure gas extraction pipeline is effectively solved, the water drainage device is simple in structure, convenient for self-processing of the mine, simple and easy to operate, capable of being repeatedly utilized and long in service life; the drainage device has the advantages that the drainage device does not need to be overhauled and maintained frequently by manpower, the purchase and maintenance cost of drainage equipment of the drainage pipeline is saved, the drainage capacity is high, the drainage capacity is less affected by impurities in a gas pipe, the drainage capacity is stable, the service life is long, convenient, automatic and continuous drainage is realized, the gas drainage effect is improved, and the guarantee is provided for high-efficiency gas drainage and safe recovery of a working face.
Description
Technical Field
The invention relates to the technical field of coal mine gas extraction, in particular to an automatic negative pressure water drainage device based on horizontal sublevel mining of a steeply inclined super-thick coal seam.
Background
The gas is the first killer for coal mine safety, enhances gas extraction, and realizes 'extraction after extraction', which is established as the permanent strategy of gas control. During the coal bed gas extraction period, water in the coal rock layer enters an extraction pipe network system through a fracture channel or is converted into a gas state under the extraction negative pressure effect, the gas state is converted into a liquid state due to temperature change after entering the extraction pipe network system, and the water in the extraction pipe network is gathered at the low-lying position of the pipe network along the pipeline under the self-weight and negative pressure effects. If accumulated water in the extraction pipe network is not cleaned in time, the gas extraction can be adversely affected in many aspects, and the method mainly comprises the steps of reducing the effective section of airflow in the pipeline, increasing extraction negative pressure loss, even leading to the extraction negative pressure to do useless work, leading to the accumulation of coal slag and particles in the pipeline to block the pipeline and the like, wherein the adverse factors directly lead to the reduction of extraction negative pressure and the reduction of extraction quantity, thereby affecting the performance of the capacity of an extraction system. At present, two forms of manual water drainage and negative-pressure automatic water drainage are generally adopted when a coal mine solves the problem of water accumulation in a gas extraction pipeline, and the former is gradually replaced by a negative-pressure automatic water drainage device due to the reasons of large labor consumption, high labor intensity, incapability of realizing continuous water drainage and the like.
In China, the reserves of thick coal seams are rich, the distribution area is wide, the yield of the steeply inclined extra-thick coal seams is relatively small and accounts for about 5% of the total yield, but in the west and south of China, 80% of mining areas are provided with steeply inclined coal seams, and in the north and northeast of China, 20-30% of mining areas are provided with steeply inclined coal seams. With the further exploration and development of coal resources, more and more steeply inclined coal seams are mined in future; and with the increase of the mining depth of the existing mining steeply inclined coal seam mine, the gas of the mine also becomes a main difficult problem of the safe mining of steeply inclined extra-thick coal seams. In addition, the high gas mining areas mined by the mine coal seam groups are more, such as Shuihuai and Yangquan. In the mining of ultra-thick coal seams in layers, steeply inclined ultra-thick layer sectional mining and coal seam group mining, roadways are often arranged in a certain range at the lower part of a mining working face for mining continuation and mine gas prevention and control. The existing automatic water drainage device mainly depends on the principle that buoyancy is combined with magnetic force to change the pressure state of the inner space of a container to realize the automatic water drainage function, impurities in a gas pipe easily influence the opening and closing performance of a buoyancy valve, manual regular maintenance and overhaul are needed to guarantee the normal water drainage function, the sealing performance requirement on the buoyancy valve is high, the influence of the impurities in a gas collecting pipe easily causes the closure of the buoyancy valve to incompletely influence the vacuum degree in the gas pipe, and further the gas extraction efficiency is influenced, and the device is small in water drainage capacity and short in service life.
Therefore, an automatic negative pressure water drainage device suitable for the mining condition is needed in the horizontal sectional mining process of the steeply inclined ultra-thick coal seam so as to meet the water drainage requirement.
Disclosure of Invention
In view of the above, the invention provides an automatic negative pressure water drainage device for horizontal sublevel mining based on a steep-dip extra-thick coal seam, which is arranged in a position relationship with an existing roadway for horizontal sublevel mining of the steep-dip extra-thick coal seam, has high water drainage capability, does not need frequent manual maintenance, and has good sealing performance.
The invention relates to an automatic negative pressure water drainage device for horizontal sublevel mining of a steeply inclined super-thick coal seam, which comprises a water container arranged on a lower roadway and a water guide pipe connected to an extraction pipeline positioned in an upper roadway and used for guiding accumulated water in the extraction pipeline to the water container.
Furthermore, an overflow port is arranged on the water container, and the lower end of the water guide pipe extends to a position below the liquid level in the water container.
Further, a water discharge opening is formed in the extraction pipeline in the upper roadway, and the pressure of a water column generated by the height between the water discharge opening and the overflow opening is not less than the maximum extraction negative pressure absolute value in the extraction pipeline at the water discharge opening.
Furthermore, a deslagging device used for cleaning particles in the extraction pipeline is arranged on the extraction pipeline.
Furthermore, the deslagging device is provided with an openable or closed deslagging port, and the water discharge port is arranged at the bottom of the deslagging device.
Furthermore, a filter screen for filtering impurities is arranged at the water outlet.
Further, the water guide pipe is a hose.
Furthermore, a bridging drill hole communicated with the lower roadway is drilled downwards in the upper roadway, and the water guide pipe is connected to the water container and the extraction pipeline through the bridging drill hole.
Furthermore, a tee joint is arranged on the extraction pipeline, and a branch of the tee joint is connected to the deslagging device downwards.
The invention has the beneficial effects that:
the invention effectively solves the problem of water accumulation of the negative pressure gas extraction pipeline of a steeply inclined super-thick coal seam horizontal sectional mining or thick coal seam layered mining or coal seam group combined mining and extraction gas mine by fully utilizing the arrangement and the mutual position relation of the existing roadways, and the water drainage device has the advantages of simple structure, convenient self-processing of the mine, simple operation, reusability and long service life; the drainage device has the advantages that the drainage device does not need to be overhauled and maintained frequently by manpower, the purchase and maintenance cost of drainage equipment of the drainage pipeline is saved, the drainage capacity is high, the drainage capacity is less affected by impurities in a gas pipe, the drainage capacity is stable, the service life is long, convenient, automatic and continuous drainage is realized, the gas drainage effect is improved, and the guarantee is provided for high-efficiency gas drainage and safe recovery of a working face.
The water drainage device has the advantages that the lower end of the water guide pipe is arranged below the water surface, the water guide pipe is sealed and used for isolating external gas from being absorbed into the extraction pipeline, the water drainage device can be sealed by simply matching the water container and the water guide pipe, the sealing performance is reliable, the negative pressure in the gas pipe is constant, and the gas extraction efficiency is ensured; in addition, the height difference relation between an upper roadway and a lower roadway is utilized to automatically overcome the negative pressure in the extraction pipeline, so that water can be discharged at any time, automatic and continuous water discharging is realized, and the water discharging capacity is improved.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic view of the overall arrangement of the present invention;
FIG. 2 is a schematic view of a water discharge device;
Detailed Description
FIG. 1 is a schematic view of the overall arrangement of the present invention; FIG. 2 is a schematic view of a water discharge device;
as shown in the figure: the automatic negative pressure water drainage device based on steep-dip super-thick coal seam horizontal sublevel mining comprises a water container 1 arranged on a lower roadway and a water guide pipe 2 which is connected to an extraction pipeline positioned in an upper roadway and drains accumulated water in the extraction pipeline to the water container 1. The method is characterized in that a plurality of horizontal roadways which are arranged up and down are arranged in the mining of the steeply inclined coal seam, as shown in a combined graph 1, an extraction pipeline 10 is laid in the upper roadway, a water drainage device is connected to the lower portion of the extraction pipeline, a water container is arranged in the lower roadway, and the water drainage device is connected to the extraction pipeline and the water container through water guide pipes and used for draining accumulated water in the extraction pipeline into the water container; the drainage device has the advantages that the drainage device does not need to be overhauled and maintained frequently by manpower, the purchase and maintenance cost of drainage equipment of the drainage pipeline is saved, the drainage capacity is high, the drainage capacity is less affected by impurities in a gas pipe, the drainage capacity is stable, the service life is long, convenient, automatic and continuous drainage is realized, the gas drainage effect is improved, and the guarantee is provided for high-efficiency gas drainage and safe recovery of a working face.
In this embodiment, the water container 1 is provided with an overflow port 3, and the lower end of the water conduit 2 extends to a position below the liquid level in the water container. The water container is of a barrel-shaped structure, the overflow gap is arranged on the upper position of the side wall of the water container, the overflow gap can be over against the drainage ditch of the roadway at the lower part to enable overflowing water to directly flow into the drainage ditch, or the overflow gap can be externally connected with a drainage pipe to discharge the water to a corresponding position, a certain amount of water is preliminarily contained in the water container, the lower end of the water guide pipe is arranged below the water surface, the water guide pipe is sealed and used for isolating external gas from being absorbed into the extraction pipeline, the water drainage device can be sealed through simple matching of the water container and the water guide pipe, the sealing performance is reliable, constant negative pressure in a gas pipe is guaranteed, and the gas extraction efficiency is guaranteed.
In the embodiment, the drainage port 4 is arranged on the extraction pipeline in the upper roadway, and the pressure of a water column generated by the height between the drainage port and the overflow port 3 is not less than the absolute value of the maximum extraction negative pressure in the extraction pipeline at the drainage port. As shown in the figure 2, the negative pressure in the extraction pipeline is automatically overcome by utilizing the height difference of the upper roadway and the lower roadway, so that the drainage at any time can be ensured, the height of the water discharge opening from the overflow opening 3 is h, the pressure of a water column with the height of h is not less than the maximum extraction negative pressure absolute value in the extraction pipeline, the structure can prevent water in the water container from being sucked back into the extraction pipeline, and the automatic and continuous drainage can be ensured.
In the embodiment, the extraction pipeline is provided with a deslagging device 5 for cleaning particulate matters in the extraction pipeline. The deslagging device is used for deslagging the interior of the extraction pipeline so as to ensure normal water drainage and avoid blockage of a water drainage port.
In this embodiment, the deslagging device is provided with an openable or airtight deslagging port 6, and the water discharge port is arranged at the bottom of the deslagging device. The deslagging port is opened or closed through the gate valve 11, waste residues in the deslagging device are cleaned through the deslagging port at regular time through the opening and closing of the gate valve, the deslagging device is convenient to maintain, the water drainage port is arranged at the bottom of the deslagging device, and the inside particles of the extraction pipeline can be gathered again along with the flow of water flow, so that the particles can be cleaned in a centralized manner.
In this embodiment, the discharge outlet is provided with a filter screen for filtering impurities. The water outlet is arranged at the bottom of the slag removing device and filters waste slag through a filter screen so as to prevent the water outlet from being blocked and the water is not smoothly discharged.
In this embodiment, the water conduit is a hose. The water guide hose has certain flexibility and compressive strength, is beneficial to the arrangement of the water guide pipe, and improves the flexibility of the arrangement of the water guide pipe.
In the embodiment, the upper roadway is drilled with a bridging borehole 8 communicated with the lower roadway downwards, and the water guide pipe is connected to the water container and the extraction pipeline through the bridging borehole. Bridging drill holes are constructed in the coal rock layer 7 near the water discharge port 4 to communicate an upper roadway and a lower roadway, the diameter of each drill hole is larger than the outer diameter of the water guide pipe, and the diameter of each drill hole is generally 75-108 mm; a water guide pipe is arranged in the bridging drill hole in the whole process, a certain length is reserved at the upper end and the lower end of the water guide pipe, and the bridging drill hole and the water guide pipe are sealed for isolating gas communication between an upper roadway and a lower roadway and preventing water body in the upper roadway from leaking; the water container is arranged nearby the exposed point of the bridging drill hole of the lower roadway, and the water guide pipe is convenient to arrange in a short distance in a bridging drill hole mode and is beneficial to water discharging.
In the embodiment, the extraction pipeline is provided with a tee joint 9, and a branch of the tee joint is connected to the deslagging device downwards. The tee joint is arranged at a low-lying position of the extraction pipeline, and a downward branch of the tee joint is connected with a deslagging device through a butterfly valve 12; the butterfly valve is kept to be opened and the gate valve is closed in the normal water discharging process. When the slag remover needs to be overhauled and maintained, the butterfly valve is closed, the gate valve is opened, and the accumulated coal slag and impurities in the slag removing device are removed to prevent the impurities from blocking the water outlet so that the water guide pipe is unsmooth in water discharging.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The utility model provides an automatic negative pressure drainage device based on steep super thick coal seam horizontal segmentation exploitation which characterized in that: the drainage device comprises a water container arranged on a lower roadway and a water guide pipe which is connected to an extraction pipeline positioned in an upper roadway and drains accumulated water in the extraction pipeline to the water container.
2. The automatic negative pressure water discharging device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 1, characterized in that: the water container is provided with an overflow port, and the lower end of the water guide pipe extends to a position below the liquid level in the water container.
3. The automatic negative pressure water discharging device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 2, characterized in that: and a water drainage port is arranged on the extraction pipeline in the upper roadway, and the pressure of a water column generated by the height between the water drainage port and the overflow port is not less than the maximum extraction negative pressure absolute value in the extraction pipeline at the water drainage port.
4. The automatic negative pressure water discharging device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 3, characterized in that: and the extraction pipeline is provided with a deslagging device used for cleaning particles in the extraction pipeline.
5. The automatic negative pressure water discharging device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 4, characterized in that: the deslagging device is provided with an openable or closed deslagging port, and the water drain port is arranged at the bottom of the deslagging device.
6. The automatic negative pressure water discharging device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 3, characterized in that: and a filter screen for filtering impurities is arranged at the water outlet.
7. The automatic negative pressure water drainage device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 1, is characterized in that: the water guide pipe is a hose.
8. The automatic negative pressure water discharging device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 1, characterized in that: and the upper roadway is drilled downwards with a bridging borehole communicated with the lower roadway, and the water guide pipe is connected to the water container and the extraction pipeline through the bridging borehole.
9. The automatic negative pressure water discharging device based on the horizontal sublevel mining of the steeply inclined super-thick coal seam according to claim 4, characterized in that: and a tee joint is arranged on the extraction pipeline, and a branch of the tee joint is connected to the deslagging device downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470219.3A CN111485945A (en) | 2020-05-28 | 2020-05-28 | Automatic negative pressure water drainage device based on steep inclined super-thick coal seam horizontal sublevel mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470219.3A CN111485945A (en) | 2020-05-28 | 2020-05-28 | Automatic negative pressure water drainage device based on steep inclined super-thick coal seam horizontal sublevel mining |
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| CN111485945A true CN111485945A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010470219.3A Pending CN111485945A (en) | 2020-05-28 | 2020-05-28 | Automatic negative pressure water drainage device based on steep inclined super-thick coal seam horizontal sublevel mining |
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| CN (1) | CN111485945A (en) |
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- 2020-05-28 CN CN202010470219.3A patent/CN111485945A/en active Pending
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