CN117759295A - Vertical double-liner coal bunker and safety construction method thereof - Google Patents
Vertical double-liner coal bunker and safety construction method thereof Download PDFInfo
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- CN117759295A CN117759295A CN202311775715.XA CN202311775715A CN117759295A CN 117759295 A CN117759295 A CN 117759295A CN 202311775715 A CN202311775715 A CN 202311775715A CN 117759295 A CN117759295 A CN 117759295A
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- 239000003245 coal Substances 0.000 title claims abstract description 104
- 238000010276 construction Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 238000004873 anchoring Methods 0.000 claims description 27
- 238000005507 spraying Methods 0.000 claims description 18
- 239000004567 concrete Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 2
- 238000004080 punching Methods 0.000 claims 1
- 230000005465 channeling Effects 0.000 abstract description 5
- 239000011150 reinforced concrete Substances 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 238000005422 blasting Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The invention relates to the technical field of coal bunker construction, in particular to a vertical double-liner coal bunker and a safe construction method thereof. The coal bunker outer container is sprayed with the anchor net for active support, the inner container adopts the U-shaped steel ring beam and reinforced concrete for pouring to form the passive support, a yielding gap is reserved between the inner container and the outer container, the deformation of a deep well vertical coal bunker body is effectively controlled, the service life of the coal bunker is ensured, a water guide pipe is reserved in the gap between the inner container and the outer container, the water leakage is guided to the lower opening of the coal bunker, the water leakage of the wall of the coal bunker is prevented from entering the inner container to be mixed with coal, and the phenomenon of water and coal channeling is avoided.
Description
Technical Field
The invention relates to the technical field of coal bunker construction, in particular to a vertical double-liner coal bunker and a safe construction method thereof.
Background
A coal bunker refers to a location where coal is temporarily stored at the bottom of a coal mine. The coal bunker plays a role in storing coal in a coal mine. In the coal production process, coal extracted by the coal mining machine and the loading machine can be transported into a coal bunker for temporary storage, sorting and other operations. The coals are required to be distributed into different coal storage cylinders according to quality through sorting, classifying, processing and the like. Thus, the mixing of different coals can be avoided, and the coal quality is prevented from being influenced.
Vertical coal silos are a common coal storage facility that is typically comprised of concrete or steel structural columns and roof caps. The coal bunker of the type can provide a larger storage space, the capacity of the coal bunker can be adjusted according to the requirement, and in the aspect of coal storage, the vertical coal bunker can provide good sealing performance, so that coal loss and environmental pollution are effectively reduced. Meanwhile, the coal storage device is widely applied in the field of coal storage due to the simple structure and convenient maintenance.
The vertical coal bunker belongs to a vertical roadway, the deformation and the damage of the vertical coal bunker are controlled by the maximum and minimum horizontal main stresses, and the difference value between the vertical coal bunker and the vertical roadway is large, so that the vertical coal bunker is difficult to support. Under the deep well condition, the high ground stress level increases the control difficulty of the surrounding rock of the roadway. Vertical coal bunker of deep well combines vertical tunnel and high ground stress horizontal tunnel characteristics: the support difficulty is further increased, so that two technical problems are caused: (1) support is easy to lose efficacy: the bin body is seriously deformed; (2) Water and coal channeling is caused by water leakage of surrounding rock cracks, and safety production is affected.
Disclosure of Invention
Aiming at the technical problems that the coal bunker support is easy to fail, water leakage affects safety production and the like, the invention provides a vertical double-liner coal bunker and a safety construction method thereof, and solves the problems of low support strength and water leakage of surrounding rock cracks in the past.
In a first aspect, the invention provides a vertical double-liner coal bunker, which comprises a bunker body, wherein an outer liner is arranged close to the inner wall of the bunker body, the outer liner is used for anchoring the bunker wall through a primary supporting anchor rod and a secondary supporting anchor rod, an inner liner is arranged in the bunker body, the inner liner is used for anchoring the bunker wall through an anchor shed anchor rod, and a yielding gap is formed between the outer liner and the inner liner.
In a second aspect, the invention provides a safe construction method of a vertical double-liner coal bunker, comprising the following steps:
s1, constructing a coal bin body to obtain the bin body;
s2, performing primary concrete spraying on the inner wall of the bin body for temporary support;
s3, anchoring the net once and forming a primary supporting anchor rod on the inner wall of the bin body, then spraying the net, forming a secondary supporting anchor rod again after the net spraying is solidified, and forming an outer liner on the inner wall of the bin body after the net spraying is solidified;
s4, constructing an inner container in the bin body, wherein a yielding gap is formed between the inner container and the outer container, the inner container comprises a plurality of ring beams which are arranged from top to bottom, the ring beams are formed by overlapping a plurality of sections of U-shaped steel ring beams, and each overlapping part is fixed by adopting a U-shaped clamping cable; a U-shaped clamping cable is arranged at the center of each section of U-shaped steel ring beam, and is provided with an anchoring bin wall of an anchor shed anchor rod matched with the U-shaped clamping cable;
s5, the rear part of the ring beam adopts a reinforced woven concrete skeleton, a support net is paved to wrap the whole ring beam, and then the concrete is sprayed to form an inner container.
Further, in the step S1, the construction method of the coal bunker body is that a vertical roadway is excavated from top to bottom, 4m of rear awning upper opening I-steel is constructed from the upper opening downwards, the upper opening of the bunker body is sealed by using a large plate and an old belt conveyor during construction for 7m, and positions of a hanging bucket, an air water pipe, a pedestrian ladder, a ventilation pipe and an air duct are reserved.
Further, in step S3, the primary support anchor rod and the secondary support anchor rod are arranged in five flowers, and the secondary support anchor rod lags behind the primary support anchor rod by 1m.
Further, in step S4, the upper and lower ring beams are connected with the shed connector by two groups of U-shaped beams matching with the U-shaped clamping cable.
In step S5, the method of the reinforced woven concrete skeleton comprises the steps of using screw steel for the reinforced bars, respectively arranging three reinforced bars between the inner and outer parts of the ring beams, then anchoring the reinforced bars in the ring beams according to a row spacing of 1500mm, hanging diamond-shaped nets on the whole section, pressing the nets by using a tray, connecting the nets firmly by using penetrating springs, and wrapping the whole ring beams.
Further, when the coal bunker body is constructed to the position of 10.5m, the lower necking is started to be constructed downwards.
Further, in step S5, after the liner construction is completed, a water guide pipe is left at the lower necking position of the bin body and in the yielding gap. The quantity and the specification of the water guide pipes are adjusted and arranged according to the water inflow, the water guide pipes guide the water leakage to the lower opening of the coal bunker, the water leakage on the wall of the bunker is prevented from entering the inner container to be mixed with the coal, and the water and coal channeling phenomenon is avoided.
The invention has the beneficial effects that: the coal bunker outer container is sprayed with the anchor net for active support, the inner container adopts the U-shaped steel ring beam and reinforced concrete for pouring to form the passive support, a yielding gap is reserved between the inner container and the outer container, the deformation of a deep well vertical coal bunker body is effectively controlled, the service life of the coal bunker is ensured, a water guide pipe is reserved in the gap between the inner container and the outer container, the water leakage is guided to the lower opening of the coal bunker, the water leakage of the wall of the coal bunker is prevented from entering the inner container to be mixed with coal, and the phenomenon of water and coal channeling is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a coal bunker top view angle structure according to an embodiment of the invention.
Fig. 2 is a longitudinal cross-sectional view of a coal bunker in accordance with an embodiment of the present invention.
In the figure, the anchor rod is supported by a 1-outer liner, a 2-inner liner, a 3-secondary support anchor rod, a 4-anchor shed anchor rod, a 5-yielding gap, a 6-U-shaped clamping cable and a 7-primary support anchor rod.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The safe construction of the vertical double-liner coal bunker is based on the following construction modes:
(1) The coal bunker and the pavement construction method provided by the invention comprise the following steps: after blasting in the range of 2m of the upper opening of the coal bunker and the upper opening of the horse road, a diamond-shaped net with the diameter of 5000mm multiplied by 1100mm is hung, the walls of the surrounding walls of the upper opening of the coal bunker are fully wrapped tightly, screw steel anchor rods are arranged according to the row spacing of 1000mm multiplied by 1000mm, and bare rocks at the upper opening of the coal bunker are prevented from falling into the coal bunker. The width of the catwalk is 2.4-1.75 m (from the upper opening to the lower opening), the catwalk is constructed obliquely from the raking machine to the wall of the coal bunker, the catwalk is constructed for 2 times, the 1 st time is carried out according to the 16-degree downhill, then the coal bunker is constructed for 3.2m, the 2 nd time is carried out according to the 30-degree downhill, then the coal bunker is constructed for 3.1m, after the gangue in the coal bunker is raked out, an anchor rope drilling machine is used for vertically drilling the center of the lower opening of the coal bunker, the height of the rest coal bunker is measured, the supporting is carried out according to an anchor net spraying supporting mode, and after the construction, the catwalk is provided with a guard rail by one side of the sidewalk, so that personnel are prevented from entering by mistake.
(2) The construction method of the coal bunker body comprises the following steps: the vertical tunnel is excavated downwards from the upper opening, 4m back tent upper opening I-steel is constructed, the large plate and the old belt conveyor are used for sealing the upper opening of the coal bunker during 7m construction, and the positions of the hanging bucket, the air water pipe, the pedestrian ladder, the ventilation pipe and the air duct are reserved. According to the figure, paving upper I-steel, using square wood with 150mm multiplied by 150mm and 1000mm height at 4 corners at a feed inlet as a fence, tightly wrapping the outside of the fence by using a diamond net, arranging a movable wood door at one side of the fence, and sealing the periphery by using a wood board. A special guard board is arranged at the top of the fence to prevent slurry from falling from the top plate and entering the coal bunker during construction.
(3) The invention discloses a pouring construction method for a lower locking port of a coal bunker, which comprises the following steps: and when the coal bunker body is constructed to a position of 10.5m, the lower necking is started to be constructed downwards. Before pouring, the measurement department confirms the data in the regulations by comparing with the coal bunker design, then the middle waistline is determined, marked on site and strictly constructed according to the middle waistline.
(4) The blasting operation of the invention adopts smooth blasting and a one-time roadway forming construction method.
(5) The rock loading and transporting mode of the invention comprises the following steps: and (3) raking and loading the gangue to 31m by using a P-60B type raking machine (new), installing a winch at a lifting point of a coal bunker gate, lifting by pulling the cow reversely, moving the raking machine upwards by 25m, constructing the coal bunker until the flattened position of the coal bunker reaches 25m, and constructing the coal bunker, wherein during the tunneling construction of the coal bunker, raking and loading the gangue by using the P-60B type raking machine at the upper opening of the coal bunker, and loading the gangue by using the P-30B type raking machine (which is positioned at a position 25m above the lifting point). When the head-on gangue cannot be raked in the catwalk, the raking machine is moved to a position 20m above the lower opening of the coal bin of the belt conveyor well, and the lower opening of the coal bin adopts a P-60B raking machine to load rocks.
The gangue discharging mode is a gangue feeding system.
Example 1
A safe construction method of a vertical double-liner coal bunker comprises the following steps:
the inner wall of the bin body adopts primary spraying of 50mm concrete as temporary support, primary anchoring net and primary supporting anchoring rod are arranged on the inner wall of the bin body, then net spraying is carried out, secondary supporting anchoring rod is arranged after net spraying is solidified, net spraying is carried out again, an outer liner is formed on the inner wall of the bin body after net spraying is solidified, the secondary anchoring net is sprayed as permanent support, the primary supporting anchoring rod and the secondary supporting anchoring rod are both made of MSGLD-600 (X) and other strong screw thread steel resin anchoring rods, the secondary supporting anchoring rod and the primary anchoring rod are arranged in five flowers, the secondary supporting anchoring rod lags behind the primary supporting anchoring rod by 1m, the row spacing between the anchoring rods is 1000mm, the specification of the anchoring rod is steel net with the thickness of 22mm multiplied by 2400mm, the total section is hung by 6mm multiplied by 2200mm multiplied by 1100mm, in order to ensure that the anchoring rod is not strutted in the whole, when the height of the coal bin is 1.5m, the primary supporting bottom plate anchoring rod is arranged after net spraying solidification, and the secondary supporting anchoring rod is sprayed again, and the ring beam is arranged; the upper necking is used for drilling anchor ropes according to the row spacing of 2000mm multiplied by 2000 mm.
Construction of the inner container is carried out after secondary anchoring net spraying support of the bin wall, a yielding gap is formed between the inner container and the outer container, the inner container comprises a plurality of ring beams which are arranged from top to bottom, the ring beams are formed by overlapping a plurality of sections of U-shaped steel ring beams, each overlapping part is fixed by adopting a U-shaped clamping cable, the overlapping length is not less than 500mm, each U-shaped steel ring beam between the upper ring beam and the lower ring beam is connected with a connecting shed by using 2 groups of U-shaped beams matched with the U-shaped clamping cable, the upper ring beam and the lower ring beam form a whole, the U-shaped steel ring beams adopt phi 12mm steel bars to weave reinforcement cages as frameworks, the spacing is 200mm, transverse ribs use phi 20mm screw steel, 3 rings are arranged between the ring beams, then the inner ring beams and the outer ring beams are anchored by strong such as MSG LD-335 in the U-shaped shed space according to the spacing of 1500mm, the whole cross section is hung with a diamond net and pressed by using a tray, the net is firmly connected by using a special penetrating spring, the ring beams are covered by the whole, the ring beams (the support is suitable for pressing, then a pre-shaped steel is covered by the supporting, then) and a slurry spraying hopper is required to be smooth, and a flat coal bin is formed, and a coal spraying bin is free from a flat wall.
After the construction of the liner is completed, a water guide pipe is reserved in the shrinkage opening part and the yielding clearance below the bin body. The quantity and the specification of the water guide pipes are adjusted and arranged according to the water inflow, the water guide pipes guide the water leakage to the lower opening of the coal bunker, the water leakage on the wall of the bunker is prevented from entering the inner container to be mixed with the coal, and the water and coal channeling phenomenon is avoided.
Example 2
Embodiment 2 is the vertical type "double-liner" coal bunker manufactured in embodiment 1, as shown in fig. 1 and 2, and comprises a bunker body, an outer liner 1 is arranged close to the inner wall of the bunker body, the outer liner 1 anchors the bunker wall through a primary supporting anchor rod 7 and a secondary supporting anchor rod 3, an inner liner 2 is arranged in the bunker body, the inner liner 2 anchors the bunker wall through an anchor shed anchor rod, and a yielding gap 5 is arranged between the outer liner 1 and the inner liner 2.
The liner 2 comprises a plurality of ring beams which are arranged from top to bottom, wherein each ring beam is formed by overlapping a plurality of sections of U-shaped steel ring beams, and each overlapping part is fixed by adopting a U-shaped clamping cable; the U-shaped clamping cable 6 is arranged at the center of each section of U-shaped steel ring beam, and the U-shaped clamping cable 6 is provided with an anchoring bin wall matched with the anchoring bin anchor rod 4.
Although the present invention has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims.
Claims (8)
1. The utility model provides a vertical type "two courages" coal bunker, includes the storehouse body, and its characterized in that hugs closely the internal wall of storehouse and is equipped with the outer courage, and the outer courage is through once supporting stock and secondary support stock anchor storehouse wall, and the internal portion of storehouse is equipped with the inner bag, and the inner bag is through anchor canopy stock anchor storehouse wall, has the clearance of letting between outer courage and the inner bag.
2. A method of safely constructing a vertical "double-lined" coal bunker of claim 1, comprising the steps of:
s1, constructing a coal bin body to obtain the bin body;
s2, performing primary concrete spraying on the inner wall of the bin body for temporary support;
s3, anchoring the net once and forming a primary supporting anchor rod on the inner wall of the bin body, then spraying the net, forming a secondary supporting anchor rod again after the net spraying is solidified, and forming an outer liner on the inner wall of the bin body after the net spraying is solidified;
s4, constructing an inner container in the bin body, wherein a yielding gap is formed between the inner container and the outer container, the inner container comprises a plurality of ring beams which are arranged from top to bottom, the ring beams are formed by overlapping a plurality of sections of U-shaped steel ring beams, and each overlapping part is fixed by adopting a U-shaped clamping cable; a U-shaped clamping cable is arranged at the center of each section of U-shaped steel ring beam, and is provided with an anchoring bin wall of an anchor shed anchor rod matched with the U-shaped clamping cable;
s5, the rear part of the ring beam adopts a reinforced woven concrete skeleton, a support net is paved to wrap the whole ring beam, and then the concrete is sprayed to form an inner container.
3. The safe construction method of the vertical double-container coal bunker according to claim 2, wherein in the step S1, the construction method of the coal bunker body is that a vertical roadway is excavated from top to bottom, 4m rear awning upper I-steel is constructed from the upper opening downwards, the upper opening of the bunker body is sealed by using a large plate and an old belt conveyor during construction for 7m, and positions of a bucket, a wind pipe, a pedestrian ladder, a ventilation pipe and a wind barrel are reserved.
4. The safe construction method of the vertical double-liner coal bunker according to claim 2, wherein in the step S3, the primary supporting anchor rod and the secondary supporting anchor rod are arranged in five flowers, and the secondary supporting anchor rod lags behind the primary supporting anchor rod by 1m.
5. The safe construction method of the vertical double-container coal bunker according to claim 2, wherein in the step S4, the upper ring beam and the lower ring beam are connected with the shed connector through two groups of U-shaped beams matched with U-shaped clamping cables.
6. The safe construction method of the vertical double-container coal bunker according to claim 2, wherein in the step S5, the reinforced steel woven concrete skeleton is formed by using screw steel for reinforcing steel, three reinforcing steel bars are respectively arranged between the inner side and the outer side of the ring beam, then anchoring is performed by punching strong anchor rods in the ring beam according to a row spacing of 1500mm, a diamond-shaped net is hung on a full section, the net is tightly pressed by a tray, the net and the net are firmly connected by a penetrating spring, and the whole ring beam is wrapped.
7. A safe construction method of a vertical double-liner coal bunker as claimed in claim 3, wherein when the coal bunker body is constructed to a position of 10.5m, the downward construction of the lower shrinkage is started.
8. The method for safely constructing a vertical double-container coal bunker according to claim 7, wherein in the step S5, after the construction of the inner container is completed, water guide pipes are reserved at the lower necking part of the bunker body and in the yielding gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311775715.XA CN117759295A (en) | 2023-12-21 | 2023-12-21 | Vertical double-liner coal bunker and safety construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311775715.XA CN117759295A (en) | 2023-12-21 | 2023-12-21 | Vertical double-liner coal bunker and safety construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117759295A true CN117759295A (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311775715.XA Pending CN117759295A (en) | 2023-12-21 | 2023-12-21 | Vertical double-liner coal bunker and safety construction method thereof |
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| Country | Link |
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| CN (1) | CN117759295A (en) |
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2023
- 2023-12-21 CN CN202311775715.XA patent/CN117759295A/en active Pending
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