CN110939465A - Construction method of novel coal bunker suitable for reciprocating load action - Google Patents
Construction method of novel coal bunker suitable for reciprocating load action Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 233
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 230000009471 action Effects 0.000 title claims abstract description 15
- 239000004567 concrete Substances 0.000 claims abstract description 30
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 5
- 241000405070 Percophidae Species 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 11
- 230000001680 brushing effect Effects 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000005641 tunneling Effects 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 125000004122 cyclic group Chemical group 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
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Abstract
The invention belongs to the technical field of coal storage, and particularly relates to a construction method of a novel coal bunker suitable for reciprocating load action, wherein a coal bunker body sequentially comprises an inner reinforcing steel bar net layer, a concrete filling layer and an outer reinforcing steel bar net layer from a coal bunker cavity to the outer side wall of the coal bunker, a coal feeding cavity of a frustum cone is formed at the upper part of the coal bunker body, and the larger end of the coal feeding cavity is communicated with a coal storage bunker in the middle of the coal bunker body; the coal outlet cavity at the lower part of the coal bunker body is in a duckbill shape, a V-shaped opening is formed in the middle of the free end of the lower part of the coal bunker body, the larger end of the V-shaped opening is arranged downwards, a pentahedron coal distributor is arranged at the V-shaped opening, and the coal outlet cavity is divided into two coal outlets by the coal distributor at the lower part of the coal bunker body; and a reinforced concrete connecting member is also arranged at the free end of the lower part of the coal bunker body. The design of the cone frustum body entering the coal cavity effectively improves the space utilization rate of the coal bunker, and the rubber concrete filled in the coal bunker can effectively increase the dynamic load impact resistance of the coal bunker, improve the stability of the coal bunker and prolong the service life of the coal bunker.
Description
Technical Field
The invention belongs to the technical field of coal storage, and particularly relates to a construction method of a novel coal bunker suitable for reciprocating load action.
Background
The coal bunker is used as an underground chamber for temporarily storing coal under a coal mine, is one of important components in coal mine construction, and in the process of underground mining of the coal mine, along with the continuous improvement of the mining depth, the ground stress is increased, so that the problem of deformation of the coal bunker is increasingly prominent. The deformation of the coal bunker not only causes great influence on the support and maintenance of the coal bunker and facilities in the coal bunker, but also creates great potential safety hazard on the stability and the safety of the coal bunker.
In addition, the coal bunker is also worth paying attention to the dynamic load resistance performance due to the fact that the coal bunker is repeatedly influenced by coal breakage impact and cyclic loading of a top coal conveyor in the using process.
At present, a vertical cylinder is generally adopted for designing a coal bunker, a bottom closing port is used as a coal unloading port, and in order to solve the influence of coal breakage on the wall of the coal bunker, a Chinese patent (patent number: 201410812765.5) discloses the coal bunker, wherein a spring and a buffer plate are adopted to prevent the coal breakage from directly impacting the wall of the coal bunker, but equipment is complex and easy to damage, a large amount of space of the coal bunker is occupied, and a container clamps the coal breakage and is difficult to maintain. For another example, chinese patent (patent No. 201810128615.0) discloses a coal bunker, in which a vibrator is added on the outer wall of the coal bunker to crush the coal, but the vibrator is liable to cause a burden on the stability of the coal bunker itself, and once resonance is formed, the coal bunker collapses.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a construction method of a novel coal bunker, which is suitable for the reciprocating load action, so that the space utilization rate of the coal bunker is improved, and the dynamic load resistance of the coal bunker is improved.
The invention is realized by the following technical scheme: a construction method of a novel coal bunker suitable for a reciprocating load effect comprises a coal bunker body, wherein the coal bunker body sequentially comprises an inner reinforcing steel bar net layer, a concrete filling layer and an outer reinforcing steel bar net layer from a coal bunker cavity to the outer side wall of the coal bunker, a coal feeding cavity of a conical frustum body is formed at the upper part of the coal bunker body, and the larger end of the coal feeding cavity is communicated with a coal storage bunker in the middle of the coal bunker body; the coal outlet cavity at the lower part of the coal bunker body is in a duckbill shape, a V-shaped opening is formed in the middle of the free end of the lower part of the coal bunker body, the larger end of the V-shaped opening is arranged downwards, a pentahedron coal distributor is arranged at the V-shaped opening, and the coal outlet cavity is divided into two coal outlets by the coal distributor at the lower part of the coal bunker body; the free end of the lower part of the coal bunker body is also provided with a reinforced concrete connecting member; the construction steps of the novel coal bunker are as follows:
firstly, supporting the side part of a coal feeder chamber: brushing and expanding the coal feeder chamber to a designed tunneling section, then carrying out combined support by adopting an anchor rod and an anchor rope, then embedding a grouting anchor rod, carrying out guniting support, grouting to reinforce loose surrounding rock, embedding the grouting anchor rod again, and finally irrigating the side part of the coal feeder chamber;
secondly, anchoring and grouting a belt main roadway at the upper opening of the reinforced coal bunker;
thirdly, constructing a reverse well drilling: constructing a guide hole from top to bottom to be communicated with the coal feeder chamber, installing a reaming bit, and reaming from bottom to top;
fourthly, brushing and expanding the coal bunker: brushing and expanding the tunneling section according to the design, carrying out combined support by adopting an anchor rod, a metal net and an anchor rope, and primarily spraying the protective metal net;
fifthly, grouting the coal bunker surrounding rock loosening ring: pre-embedding a grouting anchor rod, spraying and grouting to reinforce the loose surrounding rock;
sixthly, pouring permanent support: installing a locking steel beam at a coal outlet of the coal bunker, embedding a grouting anchor rod, and pouring reinforced concrete for permanent support;
seventhly, grouting to reinforce the coal bunker: and (5) grouting again from bottom to top to reinforce the coal feeder chamber, the coal bunker and the unloading chamber.
Furthermore, the coal distributor is a pentahedron formed by filling concrete, and comprises a rectangular bottom surface, two isosceles trapezoid surfaces and two isosceles triangle surfaces, wherein the two isosceles trapezoid surfaces extend upwards from the width of the rectangular bottom surface towards the middle direction of the coal distributor until the lower bottoms of the two isosceles trapezoid surfaces are intersected, and the two isosceles triangle surfaces extend upwards from the length of the rectangular bottom surface towards the middle direction far away from the coal distributor until the vertex angle of the isosceles triangle surface is intersected with the vertex of the lower bottoms of the two isosceles trapezoid surfaces; two isosceles triangular surfaces of the coal distributor are contacted with the gradual change surface at the inner side of the coal feeding cavity.
Furthermore, the two isosceles trapezoid surfaces and the two isosceles triangle surfaces of the coal distributor are provided with spotted chopsticks sand wiping surfaces; the inner side of the coal inlet cavity at the lower part of the coal bunker body is provided with a spotted chopsticks sand plastering surface.
Furthermore, the duckbilled coal outlet cavity is formed by downward extending the free end of the lower side of the coal storage bin and gradually collapsing inwards.
Furthermore, a bottom fixer is arranged between the gradual change surface on the outer side of the lower part of the coal bunker body and the reinforced concrete connecting member.
Furthermore, the included angle between the generatrix of the cone frustum body of the coal feeding cavity and the horizontal line is 0-90 degrees.
Furthermore, the concrete filling layer is filled with rubber concrete.
Further, the rubber concrete is prepared by mixing cement, fly ash, river sand, broken stone, water, a water reducing agent and rubber particles.
Further, the cement mortar comprises, by mass, 310 parts of cement, 50 parts of fly ash, 494 and 593 parts of river sand, 1150 parts of crushed stone, 150 parts of water, 3.4 parts of a water reducing agent and 36-54 parts of rubber particles.
Further, the cement is ordinary portland cement; the particle size of the crushed stone is 5-20 mm; the particle size of the rubber is 0.85-1 mm.
The invention has the beneficial effects that: the design of the cone frustum body of the coal feeding cavity effectively improves the space utilization rate of the coal bunker, the coal distributor is used for weakening the impact force of coal falling, the damage to coal conveying equipment in the coal feeder chamber caused by direct falling is avoided, in addition, the filled rubber concrete can effectively increase the dynamic load resistance of the coal bunker, the stability of the coal bunker is improved, and the service life of the coal bunker is prolonged.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a left side cross-sectional view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic structural view of a coal distributor according to the present invention;
in the figure, 11, an outer reinforced mesh layer, 12, a concrete filling layer, 13, an inner reinforced mesh layer, 14, spotted chopsticks sand plastering surfaces I and 15, a bottom fixer, 16, a coal inlet cavity, 17, a coal storage bin, 18, a coal outlet cavity, 181, a coal outlet, 19, a reinforced concrete connecting member, 2, a coal distributor, 21, a rectangular bottom surface, 22, an isosceles trapezoid surface, 23, an isosceles triangle surface, 24 and a spotted chopsticks sand plastering surface II.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
As shown in fig. 1 to 4, a construction method of a novel coal bunker suitable for a reciprocating load effect includes that a coal bunker body sequentially comprises an inner steel bar net layer 13, a concrete filling layer 12 and an outer steel bar net layer 11 from a coal bunker cavity to the outer side wall of the coal bunker, a coal feeding cavity 16 of a frustum cone is formed at the upper part of the coal bunker body, the coal feeding cavity 16 of the frustum cone can effectively reduce impact of coal breakage on the wall of the coal bunker, the larger end of the coal feeding cavity 16 is communicated with a coal bunker 17 in the middle of the coal bunker body, and the end cylinder of the smaller end of the coal feeding cavity 16 extends upwards to be communicated with a large belt lane at the upper opening of the coal bunker; the coal outlet cavity 18 at the lower part of the coal bunker body is in a duckbill shape, and the duckbilled coal outlet cavity 18 is formed by downwards extending the free end of the lower side of the coal bunker 17 and gradually collapsing inwards. The middle part of the free end of the lower part of the coal bunker body is provided with a V-shaped opening, the larger end of the V-shaped opening is arranged downwards, a pentahedron coal distributor 2 is arranged at the V-shaped opening, the coal outlet cavity 18 is divided into two coal outlets 181 by the coal distributor 2 at the lower part of the coal bunker body, and the lower part of each coal outlet 181 is a coal feeder chamber; the lower free end of the coal bunker body is also provided with a reinforced concrete connecting member 19.
As shown in fig. 3 and 4, the coal distributor 2 is a pentahedron formed by filling concrete, the coal distributor 2 includes a rectangular bottom surface 21, two isosceles trapezoid surfaces 22 and two isosceles triangle surfaces 23, the two isosceles trapezoid surfaces 22 extend obliquely upward from the width of the rectangular bottom surface 21 toward the middle direction of the coal distributor 2 until the lower bottoms of the two isosceles trapezoid surfaces 22 intersect, and the two isosceles triangle surfaces 23 extend obliquely upward from the length of the rectangular bottom surface 21 toward the middle direction away from the coal distributor 2 until the vertex of the isosceles triangle surface 23 intersects with the lower bottom vertex of the two isosceles trapezoid surfaces 22; two isosceles triangular surfaces 23 of the coal distributor 2 are in contact with the gradual change surface on the inner side of the coal feeding cavity 16. Preferably, two isosceles triangular surfaces 23 of the coal distributor 2 are matched with a gradual change surface in the coal outlet cavity 18; the two isosceles trapezoid surfaces 22 of the coal distributor 2 are used for guiding the coal in the coal splitting bunker to flow out from the two coal outlets 181.
Further, the two isosceles trapezoidal surfaces 22 and the two isosceles triangular surfaces 23 of the coal distributor 2 are provided with an especial chopsticks sand plastering surface II 24; the inner side of the coal inlet cavity 16 at the lower part of the coal bunker body is provided with an spotted chopsticks sand plastering surface I14, so that the wear resistance of the coal distributor 2 is improved. Other wear resistant materials may also be used.
Further, a bottom fixer 15 is arranged between the gradual change surface on the outer side of the lower part of the coal bunker body and the reinforced concrete connecting member 19, and the bottom fixer 15 is used for fixedly supporting the coal bunker.
Furthermore, the included angle between the generatrix of the frustum cone of the coal feeding cavity 16 and the horizontal line is 0-90 degrees.
As a modification of this embodiment, the concrete filling layer 12 is filled with rubber concrete. Further, the rubber concrete is prepared by mixing cement, fly ash, river sand, broken stone, water, a water reducing agent and rubber particles. According to the mass ratio, the cement is 310 parts, the fly ash is 50 parts, the river sand is 494-doped 593 parts, the broken stone is 1150 parts, the water is 150 parts, the water reducing agent is 3.4 parts, and the rubber particles are 36-54 parts. Furthermore, the cement is ordinary portland cement; the particle size of the crushed stone is 5-20 mm; the particle size of the rubber is 0.85-1 mm.
The coal bunker construction method comprises the following steps:
firstly, supporting the side part of a coal feeder chamber:
and (3) expanding the coal feeder chamber to a designed tunneling section by brushing, then adopting an anchor rod and anchor rope combined support → embedding a grouting anchor rod, spraying slurry for supporting, grouting and reinforcing the loose surrounding rock (first round grouting) → embedding the grouting anchor rod again → pouring the side part of the coal feeder chamber.
And secondly, anchoring and grouting the upper belt roadway of the reinforced coal bunker.
Thirdly, constructing a reverse well drilling:
and (3) communicating the construction guide hole with the coal feeder chamber from top to bottom → installing a hole expanding drill head → expanding the hole from bottom to top.
Fourthly, brushing and expanding the coal bunker:
and (4) brushing and expanding the tunneling section according to the design, and primarily spraying and protecting a metal net by adopting an anchor rod, a net and an anchor rope for combined support.
Fifthly, grouting the coal bunker surrounding rock loosening ring:
embedding grouting anchor rods → spraying grout → grouting and reinforcing loose surrounding rock (first round of grouting).
Sixthly, pouring permanent support:
and (4) mounting a locking steel beam at a coal outlet of the coal bunker → embedding a grouting anchor rod → pouring reinforced concrete for permanent support.
Seventhly, grouting to reinforce the coal bunker:
and (5) grouting again from bottom to top to reinforce the coal feeder chamber, the coal bunker and the unloading chamber (second-round grouting).
Wherein the support parameters are as follows:
(1) anchor rod: the special deformed steel bar for the IV-level anchor rod is adopted for processing, and phi 22 multiplied by 2800mm equal-strength resin anchor rods are arranged at intervals of 700 multiplied by 700 mm; anchoring agent Z2360 type, 2 pieces/sleeve. The included angle between the anchor rod drilling hole and the coal bunker profile is not less than 75 degrees, and the initial anchoring torque of the nut is not less than 300 N.m.
(2) Anchor rope: phi 17.8 multiplied by 6300mm, and the row spacing is 1400 multiplied by 1400 mm; anchoring agent Z2360 type, 3 pieces/sleeve. And an included angle between the anchor cable drilling hole and the profile of the coal bunker is not less than 75 degrees, and the pretightening force of the anchor cable is not less than 150 KN.
(3) Metal mesh: and (5) processing steel bars with the diameter of 6.5mm, and meshing the steel bars by 100 mm.
(4) Reinforcing steel bars: pouring concrete with double-layer reinforcing steel bars, wherein the reinforcing steel bars have the specification of phi 18@300mm, the thickness of the concrete protective layer (from the outer edge of the stressed reinforcing steel bar) is preferably 50mm at the inner edge, and is preferably 70mm at the outer edge.
(5) Concrete spraying: strength C20, thickness 50 mm.
(6) Pouring concrete: strength C30, thickness 500mm (feeder chamber thickness 600 mm).
The dynamic load resistance of the rubber concrete adopted by the invention is shown by the following examples, the compression strength parameter and the strain in the cyclic loading and unloading process are tested by an RDL-200 type electronic creep relaxation testing machine developed by Changchun mechanical institute, and the cement is P.C 42.5 composite portland cement produced by a cement plant of eight public mountains in the south of Huai.
Example 1
310kg of cement, 50kg of fly ash, 494kg of river sand, 1150kg of broken stone and 36kg of rubber particles are mixed and stirred for 15min at the temperature of 20 ℃, 150kg of water and 3.4kg of water reducing agent are added and stirred for 10min to prepare a cylindrical rubber concrete test piece with the diameter of 50mm and the height of 100mm, the cylindrical rubber concrete test piece is maintained for 28d, a uniaxial compression test and a uniaxial compression strength test after cyclic loading and unloading are respectively carried out for 50 times, and the test results are shown in table 1.
Comparative example 1
310kg of cement, 50kg of fly ash, 791kg of river sand and 1150kg of broken stone are mixed and stirred for 15min at the temperature of 20 ℃, 150kg of water and 3.4kg of water reducing agent are added and stirred for 10min to prepare a cylindrical common concrete test piece with the diameter of 50mm and the height of 100mm, the concrete test piece is maintained for 28d, a uniaxial compressive test and a uniaxial compressive strength test after cyclic loading and unloading are respectively carried out for 50 times, and the test results are shown in table 2.
TABLE 1
| Treatment method | Compressive strength (MPa) | Modulus of elasticity (GPa) | Peak strain (10)-2） |
| Before cyclic loading and unloading | 16.72 | 1.87 | 2.139 |
| After cyclic loading and unloading | 15.46 | 1.68 | 3.425 |
TABLE 2
| Processing methodFormula (II) | Compressive strength (MPa) | Modulus of elasticity (GPa) | Peak strain (10)-2） |
| Before cyclic loading and unloading | 20.35 | 3.15 | 1.664 |
| After cyclic loading and unloading | 18.11 | 1.99 | 1.725 |
According to the test results, after the loading effect of the cyclic dynamic load, the compressive strength and the elastic modulus of the rubber concrete are reduced to a small extent, and the strain capacity is increased to a large extent, which shows that the rubber concrete has better stability and ductility, and is not easy to generate brittle failure, so that the capacity of resisting the cyclic dynamic load is improved.
Claims (10)
1. A construction method of a novel coal bunker suitable for reciprocating load action is characterized by comprising the following steps: the coal bunker body sequentially comprises an inner reinforcing steel bar net layer (13), a concrete filling layer (12) and an outer reinforcing steel bar net layer (11) from a coal bunker cavity to the outer side wall of the coal bunker, a coal inlet cavity (16) of a cone frustum body is formed at the upper part of the coal bunker body, and the larger end of the coal inlet cavity (16) is communicated with a coal storage bunker (17) in the middle of the coal bunker body; the coal outlet cavity (18) at the lower part of the coal bunker body is in a duckbill shape, a V-shaped opening is formed in the middle of the free end of the lower part of the coal bunker body, the larger end of the V-shaped opening is arranged downwards, a pentahedral coal distributor (2) is arranged at the V-shaped opening, and the coal outlet cavity (18) is divided into two coal outlets by the coal distributor (2) at the lower part of the coal bunker body; the free end of the lower part of the coal bunker body is also provided with a reinforced concrete connecting member (19); the construction steps of the novel coal bunker are as follows:
firstly, supporting the side part of a coal feeder chamber: brushing and expanding the coal feeder chamber to a designed tunneling section, then carrying out combined support by adopting an anchor rod and an anchor rope, then embedding a grouting anchor rod, carrying out guniting support, grouting to reinforce loose surrounding rock, embedding the grouting anchor rod again, and finally irrigating the side part of the coal feeder chamber;
secondly, anchoring and grouting a belt main roadway at the upper opening of the reinforced coal bunker;
thirdly, constructing a reverse well drilling: constructing a guide hole from top to bottom to be communicated with the coal feeder chamber, installing a reaming bit, and reaming from bottom to top;
fourthly, brushing and expanding the coal bunker: brushing and expanding the tunneling section according to the design, carrying out combined support by adopting an anchor rod, a metal net and an anchor rope, and primarily spraying the protective metal net;
fifthly, grouting the coal bunker surrounding rock loosening ring: pre-embedding a grouting anchor rod, spraying and grouting to reinforce the loose surrounding rock;
sixthly, pouring permanent support: installing a locking steel beam at a coal outlet of the coal bunker, embedding a grouting anchor rod, and pouring reinforced concrete for permanent support;
seventhly, grouting to reinforce the coal bunker: and (5) grouting again from bottom to top to reinforce the coal feeder chamber, the coal bunker and the unloading chamber.
2. The construction method of the novel coal bunker suitable for reciprocating load action as claimed in claim 1, characterized in that: the coal distributor (2) is a pentahedron formed by filling concrete, the coal distributor (2) comprises a rectangular bottom surface (21), two isosceles trapezoid surfaces (22) and two isosceles triangle surfaces (23), the two isosceles trapezoid surfaces (22) extend obliquely upwards from the width of the rectangular bottom surface (21) to the middle direction of the coal distributor (2) until the lower bottoms of the two isosceles trapezoid surfaces (22) are intersected, and the two isosceles triangle surfaces (23) extend obliquely upwards from the length of the rectangular bottom surface (21) to the middle direction far away from the coal distributor (2) until the vertex angle of the isosceles triangle surface (23) is intersected with the lower bottoms of the vertexes of the two isosceles trapezoid surfaces (22); two isosceles triangular surfaces (23) of the coal distributor (2) are in contact with a gradual change surface on the inner side of the coal feeding cavity (16).
3. The construction method of the novel coal bunker suitable for reciprocating load action as claimed in claim 2, characterized in that: the two isosceles trapezoidal surfaces (22) and the two isosceles triangular surfaces (23) of the coal distributor (2) are provided with chopsticks sand wiping surfaces; the inner side of the coal inlet cavity (16) at the lower part of the coal bunker body is provided with an spotted chopsticks sand plastering surface.
4. The construction method of the novel coal bunker suitable for reciprocating load action as claimed in claim 1, characterized in that: the duckbilled coal outlet cavity (18) is formed by downward extending the free end of the lower side of the coal storage bin (17) and gradually collapsing inwards.
5. The construction method of the novel coal bunker suitable for reciprocating load action as claimed in claim 4, characterized in that: a bottom fixer (15) is arranged between the gradual change surface on the outer side of the lower part of the coal bunker body and the reinforced concrete connecting member (19).
6. The construction method of the novel coal bunker suitable for reciprocating load action as claimed in claim 1, characterized in that: the included angle between the generatrix of the cone frustum body of the coal feeding cavity (16) and the horizontal line is 0-90 degrees.
7. The construction method of the novel coal bunker suitable for reciprocating load action as claimed in claim 1, characterized in that: the concrete filling layer (12) is filled with rubber concrete.
8. The method for constructing a novel coal bunker suitable for reciprocating load action as claimed in claim 7, wherein: the rubber concrete is prepared by mixing cement, fly ash, river sand, broken stone, water, a water reducing agent and rubber particles.
9. The method for constructing a novel coal bunker suitable for reciprocating load action as claimed in claim 8, wherein: according to the mass ratio, the cement is 310 parts, the fly ash is 50 parts, the river sand is 494-doped 593 parts, the broken stone is 1150 parts, the water is 150 parts, the water reducing agent is 3.4 parts, and the rubber particles are 36-54 parts.
10. The method for constructing a novel coal bunker suitable for reciprocating load action as claimed in claim 9, wherein: the cement is ordinary portland cement; the particle size of the crushed stone is 5-20 mm; the particle size of the rubber is 0.85-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271883.9A CN110939465A (en) | 2019-12-12 | 2019-12-12 | Construction method of novel coal bunker suitable for reciprocating load action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271883.9A CN110939465A (en) | 2019-12-12 | 2019-12-12 | Construction method of novel coal bunker suitable for reciprocating load action |
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| CN112814699A (en) * | 2020-12-31 | 2021-05-18 | 山东东山新驿煤矿有限公司 | Coal bunker support and construction process thereof |
| CN115722003A (en) * | 2022-11-30 | 2023-03-03 | 阿拉善盟沪蒙能源实业有限公司 | Automatic gas filtering system |
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| CN115722003A (en) * | 2022-11-30 | 2023-03-03 | 阿拉善盟沪蒙能源实业有限公司 | Automatic gas filtering system |
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