CN109505639A - A kind of gob side entry driving coal column hardened system and its application method - Google Patents
A kind of gob side entry driving coal column hardened system and its application method Download PDFInfo
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- CN109505639A CN109505639A CN201910006597.3A CN201910006597A CN109505639A CN 109505639 A CN109505639 A CN 109505639A CN 201910006597 A CN201910006597 A CN 201910006597A CN 109505639 A CN109505639 A CN 109505639A
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- coal column
- anchor cable
- slip casting
- air bag
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- 239000003245 coal Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007569 slipcasting Methods 0.000 claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 238000004873 anchoring Methods 0.000 claims abstract description 17
- 238000012806 monitoring device Methods 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 75
- 238000005553 drilling Methods 0.000 claims description 30
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 238000007664 blowing Methods 0.000 claims description 13
- 239000011440 grout Substances 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000005065 mining Methods 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a kind of gob side entry driving coal column hardened system and its application methods, belong to coal mine gob side entry driving support technology field.Anchor cable, inlet well, grouting monitoring device and slip casting machine are reinforced including coal column, it includes anchoring section, free segment and gangue stopping device that coal column, which reinforces anchor cable,；Anchoring section includes air bag, front fixed ring, rear portion fixed ring and injected hole, and front fixed ring and rear portion fixed ring are used for fixation balloon, and front fixed ring is located at the front end of air bag, and rear portion fixed ring is located at the rear end of air bag, and injected hole is located in the fixed ring of rear portion；Free segment includes steel strand wires, pallet, lockset and interior Grouting Pipe, and interior Grouting Pipe one end is connect with injected hole, and the other end is connect with grouting monitoring device, and air bag is arranged along steel strand wires length direction, and air bag is coated on the outer peripheral surface of steel strand wires.The present invention can unidirectionally carry out coal column reinforcing in gob side entry driving, improve the stability and bearing capacity of coal column.
Description
Technical field
The invention belongs to coal mine gob side entry driving support technology fields, and in particular to a kind of gob side entry driving coal column hardened system and
Its application method.
Background technique
With the raising of coal mining mechanization degree, the increasing of mine yield and mining depth, to coal mining rate and
The requirement of stope drift active workings support technology is higher and higher, and the arrangement that traditional staying sets wider section coal pillar shield lane has been unable to meet
It is required that.Staying thin coal pillar gob side entry driving is one of the effective ways for improving coal mining rate.Gob side entry driving is in upper curtate working face
Mining influence caused by back production is stablized later along the tunnel of mined out area edge driving.Gob side entry driving technology has coal due to tunnel
Recovery ratio is high, is easy many advantages, such as maintenance, gradually promotes and applies in the multiple mining areas in China in recent years, and thin coal pillar is dug along sky
The important component of lane country rock, stability directly affect the stability of tunnel entirety, therefore need to reinforce branch to thin coal pillar
Shield.
In existing technology, is reinforced for gob side entry driving coal column, carried out a series of technological improvements, such as: (1)
CN201410150974.8 discloses a kind of gob side entry driving coal column anchor cable to wearing reinforcement means, although this method is using anchor cable to wearing
Reinforcement technique can apply biggish anchor force to coal column, improve the support strength of coal column, ensure the steady in a long-term of coal column, but should
Method need to be punched on coal column in advance after upper curtate is exploited and finished, install preset anchor cable, process is tedious, in addition mutually
There are the reserved inaccuracy of width, error is larger to be will lead to can not carry out to wearing reinforcing lane coal column；(2) CN201710035988.9 is public
A kind of two-way reinforcement means of gob side entry driving coal column has been opened, the two-way reinforcing of prearranged pillar is realized using swollen locking-type two-ended cables, and
Construct in the side of prearranged pillar can complete, and can enhance the bearing capacity and stability of blind pass coal column, but in this method
Swollen locking-type two-ended cables design comparison is complicated, can not understand the pressure dilated in pouch when slip casting in real time, and expand pouch and exist
It before non-slip casting, is easy to be shriveled by goaf spoil, grouting difficulty causes the two-way reinforcing of coal column that can not carry out, in addition, broken in coal column
When broken, this method can only reinforce coal column two sides, can not accomplish coal column internal reinforcement, cause the stability and bearing capacity of coal column
It substantially reduces.
Summary of the invention
The purpose of the present invention is to provide a kind of gob side entry driving coal column hardened system and its application methods, can dig along sky
Coal column reinforcing is unidirectionally carried out in lane, improves the stability and bearing capacity of coal column.
One of task of the invention is to provide a kind of gob side entry driving coal column hardened system, and which employs following technical sides
Case:
A kind of gob side entry driving coal column hardened system, including coal column reinforce anchor cable, inlet well, grouting monitoring device and slip casting
Machine, it is characterised in that:
It includes anchoring section, free segment and gangue stopping device that the coal column, which reinforces anchor cable,；
The anchoring section includes air bag, front fixed ring, rear portion fixed ring and injected hole, the front fixed ring and institute
Rear portion fixed ring is stated for fixing the air bag, the front fixed ring is located at the front end of the air bag, the rear portion fixed ring
Positioned at the rear end of air bag, the injected hole is located in the rear portion fixed ring；
The free segment includes steel strand wires, pallet, lockset and interior Grouting Pipe, described interior Grouting Pipe one end and the slip casting
Hole connection, the other end are connect with the grouting monitoring device, and the air bag is arranged along steel strand wires length direction, the air bag
It is coated on the outer peripheral surface of the steel strand wires；
The gangue stopping device includes cylinder, steel plate, spring, bolt and canvas, and the diameter of the cylinder and the steel twist
The diameter of line is identical, and outer peripheral surface is evenly arranged four fixed connection apparatus, the cloth on the left of the cylinder on the left of the cylinder
Vertical drilling is set, arranges cross drilling in middle position；Described steel plate one end is connect by bolt with the fixed connection apparatus；
The spring is mounted in the cross drilling and vertical drilling, and the both ends of the spring is connect with steel plate, is contained inside the canvas
There is iron wire, the canvas is fixed on the steel plate；
The slip casting machine include motor, slip casting steel pipe, control valve, slurry can, spiral pushing device, three-legged support,
Pulp steel pipe and rotational speed governor, the slurry can are cylinder, and the motor is located at the top of slurry can, the slip casting steel
Pipe is set to slurry can upper side, is arranged the control valve between the Grouting Pipe and slurry can, inside the slurry can
The spiral pushing device is set, and the spiral pushing device includes central spindle and is fixedly arranged on central spindle side using its axis as rotary shaft edge
Axial screw, which is advanced, extends to the helical blade of rear end from its front end, in the helical blade along with central spindle is closed is bonded, outer
With slurry can shell is closed is bonded, a slot is correspondingly formed between the adjacent blade of helical blade and central spindle, entire helical blade is in axis
Formation extends to the spiral of rear end face connection front/rear end from its front end face and leads matter slot on core, and the three-legged support is located at storage and starches
Tank lower part, the pulp steel pipe is set to slurry can bottom, control valve is arranged between the pulp steel pipe and slurry can, described
Rotational speed governor is arranged on slurry can surface.
As a preferred solution of the present invention, the grouting monitoring device is connect with the slip casting machine, described
Grouting monitoring device includes main grouting pipe, and main inlet control valve, the main inlet control valve side are equipped on the main grouting pipe
Be equipped with into slurry regulating valve, it is described into slurry regulating valve on be connected with pressure gauge one, the main inlet control valve other side is equipped with blowing
Regulating valve, is connected with pressure gauge two in the blowing regulating valve, the main grouting pipe into slurry regulating valve side be slurry-feeding hole, institute
It states slurry-feeding hole to connect with the grout outlet of the slip casting machine, blowing regulating valve side is slurry outlet, and the slurry outlet is connected with
Slip casting hose.
Further, the coal column reinforces anchor cable arrangement are as follows: first row makes a call to three coal columns and reinforces anchor cable, and second row is beaten
Two coal columns reinforce anchor cable, so recycle, and array pitch is 1.5m × 1.5m between the coal column reinforces anchor cable.
Further, the depth of the inlet well is the half of coal column.
Another task of the invention is to provide a kind of application method of above-mentioned gob side entry driving coal column hardened system, successively wrap
Include following steps:
A, anchor cable drilling is drilled at the coal column of gob side entry driving goaf side, the depth of the anchor cable drilling is to penetrate coal column；
B, the coal column reinforcing anchor cable is drilled by the anchor cable penetrates coal column, the anchoring section of the coal column reinforcing anchor cable,
Gangue stopping device is located in goaf, and the anchoring section that the coal column reinforces anchor cable is close to goaf side coal column wall；
C, the gangue stopping device is mounted in anchor cable drilling, and spring is in compressive state, and steel plate, canvas are tightly attached to air bag four
In week, when gangue stopping device enters goaf, spring is flicked, and steel plate and canvas are opened therewith, forms the shape of " umbrella ", to play gear
The firmly effect of goaf spoil；
D, the slip casting hose is connect with the slurry outlet, and the grout outlet is connect with the slurry-feeding hole；
E, start slip casting machine, so that slurry is reached suitable speed discharge by adjusting rotational speed governor, by slurry by infusing
Starch monitoring device injection air bag in, during slip casting, observe pressure gauge one, two numerical value of pressure gauge, by adjust main inlet control valve, into
Slurry regulating valve, blowing regulating valve close note when pressure gauge one, pressure gauge two reach specified value to control the flow of slurry
Pulp grinder closes main inlet control valve, stops slip casting；
F, it is reinforced between anchor cable drilling in the coal column and is drilled with inlet well, the inlet well depth is coal column half,
Slip casting is carried out to the inlet well by slip casting machine；
G, along tunnelling direction, coal column of successively constructing reinforces anchor cable, realizes that the coal column of entire working face is reinforced.
Advantageous effects brought by the present invention are as follows:
(1) present invention is different from the pre-buried anchor cable reinforcing mode of traditional gob side entry driving, but is added in tunnel using coal column
Gu anchor cable reinforces coal column, realizes that two faces of coal column are constrained each other, limit its deformation；
(2) by inlet well slip casting into coal column, the integrality of coal column can be improved, solve traditional gob side entry driving coal
The problem that column is broken, intensity is low improves the stability and bearing capacity of coal column entirety, effectively reduces roadway deformation；
(3) goaf spoil can effectively prevent by coal column reinforcing anchor cable gangue stopping device and pushes down or crush air bag, lead to
Intracapsular pressure, balloon rupture excessive to prevent pressure can be understood in real time by crossing grouting monitoring device；
(4) auger device rotary speed is controlled by adjusting slip casting machine rotational speed governor, is adapted to the note of varying environment
Slurry, can effectively adjust the speed of slip casting, lead to balloon rupture to prevent injection speed is too fast.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is a kind of structural schematic diagram of gob side entry driving coal column hardened system of the present invention；
Fig. 2 is that coal column reinforces anchor cable, injected hole arrangement schematic diagram；
Fig. 3 is that coal column reinforces anchor cable compression schematic diagram；
Fig. 4 is that coal column reinforces anchor cable expanded schematic diagram；
Fig. 5 is that coal column reinforces anchor cable schematic cross-section；
Fig. 6 is gangue stopping device drilling arrangement schematic diagram；
Fig. 7 is grouting monitoring schematic device；
Fig. 8 is slip casting machine schematic diagram；
Fig. 9 is slip casting machine rotational speed governor schematic diagram；
In figure: the tunnel 1-；2- coal column；The goaf 3-；4- coal column reinforces anchor cable, 41- anchoring section, 411- air bag, before 412-
Portion's fixed ring, the rear portion 413- fixed ring, 414- injected hole, 42- free segment, 421- steel strand wires, 422- slip casting hose, 423- support
Disk, 424- lockset, 43- gangue stopping device, 431- high intensity cylinder, 4311- fixed connection apparatus, 4312- vertically drill, 4313-
Cross drilling, 432- high-strength steel sheet, 433- bolt, 434- high-strength spring, 435- canvas；5- slip casting machine, 51- motor,
52- slip casting steel pipe, 53- control valve, 54- slurry can, 55- spiral pushing device, 551- central spindle, 552- helical blade, 56- tri-
Foot support, 57- grout outlet, 58- rotational speed governor, 581- " NO " start key, 582- " OFF " stop key, 583- speed control key；
6- grouting monitoring device, the main grouting pipe of 61-, 62- slurry-feeding hole, 63- pressure gauge one, 64- into slurry regulating valve, 65- main inlet control valve,
66- pressure gauge two, 67- blowing regulating valve, 68- slurry outlet；7- inlet well.
Specific embodiment
The invention proposes a kind of gob side entry driving coal column hardened system and its application method, in order to make advantages of the present invention,
Technical solution is clearer, clear, elaborates combined with specific embodiments below to the present invention.
The present invention, a kind of gob side entry driving coal column hardened system, including coal column reinforce anchor cable 4, inlet well 7, slip casting machine 5,
Grouting monitoring device 6.As shown in Figure 1, Figure 2, coal column reinforces anchor cable arrangement are as follows: first row makes a call to three coal columns and reinforces anchor cable
4, second row makes a call to two coal columns and reinforces anchor cable 4, so recycles, and it is 1.5m × 1.5m that coal column, which reinforces 4 array pitch of anchor cable,.Inlet well
7 are drilled between the coal column reinforcing drilling of anchor cable 4, and 7 depth of inlet well is coal column half.
In conjunction with shown in Fig. 3-Fig. 6, it includes anchoring section 41 that coal column of the present invention, which reinforces anchor cable 4, free segment 42, gangue stopping device 43,
Anchoring section 41 includes: air bag 411, front fixed ring 412, rear portion fixed ring 413, injected hole 414.Air bag 411 is using high-intensitive
Rubber material, air bag 411 arrange that air bag 411 is coated on the outer peripheral surface of steel strand wires 421 along 421 length direction of steel strand wires.Front is solid
Ring 412 and the rear portion fixed ring 413 are determined for fixation balloon 411, and front fixed ring 412 is located at 411 front end of air bag, and rear portion is solid
Determine ring 413 and be located at 411 rear end of air bag, an injected hole is arranged in rear portion fixed ring 413.
Free segment 42 includes: steel strand wires 421, pallet 423, lockset 424, slip casting hose 422.421 specification of steel strand wires regards coal
2 fastening strength of column determines.Pallet 423 uses material to be stamped to form for high-strength steel sheet.Slip casting hose 422 is High Voltage hose,
422 one end of slip casting hose is connect with injected hole 414, and the other end is connect with 6 slurry outlet 68 of grouting monitoring device.
Gangue stopping device 43 includes: high-intensitive cylinder 431, high-strength steel sheet 432, high-strength spring 434, bolt 433, canvas
435.High-intensitive 431 length of cylinder is 30cm, and diameter is identical as 421 diameter of steel strand wires, at 431 left side 5cm, high-intensitive cylinder
It sets outer peripheral surface and is evenly arranged four fixed connection apparatus 4311, vertically drill in high-intensitive 431 left side 10cm location arrangements of cylinder
4312, cross drilling 4313 is arranged in middle position.432 length of high-strength steel sheet be 35cm, width 5cm, with a thickness of
0.8cm, described 432 one end of high-strength steel sheet are connect by bolt 433 with the fixed connection apparatus 4311, the high strength steel
There are four plate 432 is total.High-strength spring 434 is placed in cross drilling 4313 and vertical drilling 4312, and 434 liang of high-strength spring
End connect with high-strength steel sheet 432, high-strength spring 434 be total to there are two.Contain high-intensitive iron wire, canvas 435 inside canvas 435
It is fixed on high-strength steel sheet 432.
Gangue stopping device 43 is connect with anchoring section 41 by the front fixed ring 412.
Slurry is anchoring chemical grout in air bag 411, and 7 slurry of inlet well is the chemical pulps such as cement grout or Ma Lisan
Liquid.
In conjunction with shown in Fig. 7-8, slip casting machine 5 of the present invention includes motor 51, slip casting steel pipe 52, control valve 53, slurry can
54, spiral pushing device 55, central spindle 551, helical blade 552, three-legged support 56, grout outlet 57, rotational speed governor 58, " NO " is opened
Dynamic key 581, " OFF " stop key 582, speed control key 583.
Slurry can 54 is cylinder, and motor 51 is located at the top of slurry can 54, and slip casting steel pipe 52 is set to slurry can 54
Upper side, is arranged control valve 53 between slip casting steel pipe 52 and slurry can 54, slurry can 54 is internally provided with screw propulsion dress
Set 55, spiral pushing device 55 include central spindle 551 and be fixedly arranged on central spindle side using its axis be rotary shaft along axial screw advance from
Its front end extends to the helical blade 552 of rear end, in helical blade 552 along with central spindle 551 is closed is bonded, outer and slurry can 54
The closed fitting of shell, is correspondingly formed a slot between the adjacent blade of helical blade 552 and central spindle 551, entire helical blade 552 is in axis
Formation extends to the spiral of rear end face connection front/rear end from its front end face and leads matter slot on core 551, and three-legged support 56 is located at storage
54 lower part of tank is starched, the grout outlet 57 is set to 54 bottom of slurry can, and control is arranged between the grout outlet 57 and slurry can 54
Valve 53, the rotational speed governor 58 setting on 54 surface of slurry can, the rotational speed governor 58 include " NO " start key 581,
" OFF " stop key 582, speed control key 583, the speed control key 583 divide for " I ", " II ", " III " three gears.
Specifically, 5 operating process of slip casting machine: pressing " NO " start key 581, the motor on the rotational speed governor 58
51 startings, the rotation of 51 bearing of motor drive the rotation of 54 internal helicoid propulsion device 55 of slurry can, 55 high speed of auger device
Spiral rotating, which advances, does manual work, and generates the thrust of delivery slurry, and final slurry is discharged from grout outlet 57, and slip casting terminates to press described turn
" OFF " stop key 582 on fast controller 58, slip casting machine 5 stops working.By adjusting the speed control above rotational speed governor 58
Key 583 adjusts the revolving speed of spiral pushing device 55, and " I ", " II ", " III " three gear speed successively increase, and then preferably suitable
Slip casting under varying environment is answered to work.
As shown in figure 9, grouting monitoring device 6 of the present invention is the main grouting pipe 61 connecting with slip casting machine 5, main grouting pipe
Main inlet control valve 65 is installed, main inlet control valve 65 can flexibly be controlled into slurry amount, and 65 side of main inlet control valve is equipped on 61
Into slurry regulating valve 64, it is connected with pressure gauge 1 in regulating valve 64 into starching, it can be with the pressure of flexible modulation slurry into slurry regulating valve 64
Power, pressure gauge 1 are used to show the convenient adjusting into slurry regulating valve 64 to slurry pressure of pressure value, 65 other side of main inlet control valve
Blowing regulating valve 67 is installed, pressure gauge 2 66 is connected in blowing regulating valve 67, dump valve 67 is for defeated to slip casting hose 422
The control of the grouting amount entered, main grouting pipe 61 are slurry-feeding hole 62, slurry-feeding hole 62 and slip casting machine pulp into 64 side of regulating valve is starched
Pipe 57 connects, and 67 side of grouting pipe blowing regulating valve is slurry outlet 68, and slurry outlet 68 is connect with slip casting hose 422.
The application method of above-mentioned gob side entry driving coal column hardened system, comprising the following steps:
(1) in gob side entry driving goaf, 6 side coal column 2 carries out being drilled with anchor cable drilling, and anchor cable drilling depth is to penetrate coal column 2,
Anchor cable drilling reinforces anchor cable 4 for installing coal column.Gob side entry driving prearranged pillar generally in 3-5m or so, was set if coal column stays
Narrow, the stability and bearing capacity of coal column are not achieved, and coal column crushes easily, and cause roadway deformation, unstability；It is set if coal column stays
It is wide, it results in waste of resources；
(2) coal column reinforces anchor cable 4 and penetrates coal column 2 by anchor cable drilling, and coal column reinforces 4 anchoring section 41 of anchor cable, gear cash
Device 43 is located in goaf 3, and coal column reinforces 4 anchoring section 41 of anchor cable and is close to 3 side coal column wall of goaf；
(3) for gangue stopping device 43 in anchor cable drilling, high-strength spring 434 is in compressive state, high-strength steel sheet 432, sail
Cloth 435 is tightly attached to 411 surrounding of air bag, wear-out failure during advance in anchor cable drills to prevent air bag 411, when gangue stopping device 43
When into goaf 3, high-strength spring 434 is flicked, and high-strength steel sheet 432 and canvas 435 are opened therewith, forms the shape of " umbrella "
Shape can play the role of blocking 3 spoil of goaf, push down air bag 411 to prevent spoil；
(4) slip casting hose 422 is connect with the slurry outlet 68 of grouting monitoring device 6,5 grout outlet 57 of slip casting machine and grouting monitoring
The slurry-feeding hole 62 of device 6 connects；
(5) start slip casting machine 5, so that slurry is reached suitable speed discharge by adjusting rotational speed governor 58, slurry is passed through
It crosses grouting monitoring device 6 to inject in air bag 411, during slip casting, observes pressure gauge 1,2 66 numerical value of pressure gauge, pass through tune
Section main inlet control valve 65, the flow that slurry is controlled into slurry regulating valve 64, blowing regulating valve 6, when pressure gauge 1, pressure gauge 2 66
When reaching specified value, slip casting machine 5 is closed, closes main inlet control valve 65, stops slip casting.It is tested through experiment, when pressure-detecting device 6
Upper pressure gauge stops slip casting when reaching 2Mpa, 2-3 hours rear gasbags 411 is waited to form stable anchorage body, and 411 slip casting of air bag is stablized
Anchorage effect can be not only played afterwards, can also block drilling, prevent 3 pernicious gas of goaf from overflowing, when slurry in air bag 411
After solidification, the pallet 423 of anchor cable 4 is reinforced to coal column in 1 side of tunnel, lockset 424 anchors, application prestressing force, 411 entoplasm of air bag
Body is fast quick solidifying slurries；
(6) it is reinforced between anchor cable drilling in coal column and be drilled with inlet well 7,7 depth of inlet well is 2 half of coal column,
Slip casting is carried out to inlet well 7 by slip casting machine 5；
(7) coal column reinforces 4 arrangement of anchor cable are as follows: first row makes a call to three coal columns and reinforces anchor cable 4, and second row makes a call to two coal columns
Anchor cable 4 is reinforced, is so recycled, it is 1.5m × 1.5m that the coal column, which reinforces 4 array pitch of anchor cable,；
(8) along tunnelling direction, coal column of successively constructing reinforces anchor cable 4, realizes that the coal column 2 of entire working face is reinforced.
It uses for reference the prior art and can be realized in the above-mentioned part that do not address.
It should be noted that any equivalent way that those skilled in the art are made under the introduction of this specification, or
Obvious variant should all be within the scope of the present invention.
Claims (5)
1. a kind of gob side entry driving coal column hardened system, including coal column reinforce anchor cable, inlet well, grouting monitoring device and slip casting
Machine, it is characterised in that:
It includes anchoring section, free segment and gangue stopping device that the coal column, which reinforces anchor cable,；
The anchoring section includes air bag, front fixed ring, rear portion fixed ring and injected hole, the front fixed ring and it is described after
Portion's fixed ring is for fixing the air bag, and the front fixed ring is located at the front end of the air bag, and the rear portion fixed ring is located at
The rear end of air bag, the injected hole are located in the rear portion fixed ring；
The free segment includes steel strand wires, pallet, lockset and interior Grouting Pipe, and described interior Grouting Pipe one end and the injected hole connect
It connects, the other end is connect with the grouting monitoring device, and the air bag is arranged along steel strand wires length direction, the air bag cladding
In the outer peripheral surface of the steel strand wires；
The gangue stopping device includes cylinder, steel plate, spring, bolt and canvas, the diameter of the cylinder and the steel strand wires
Diameter is identical, and outer peripheral surface is evenly arranged there are four fixed connection apparatus on the left of the cylinder, arranges on the left of the cylinder
Vertical drilling arranges cross drilling in middle position；Described steel plate one end is connect by bolt with the fixed connection apparatus；Institute
It states spring to be mounted in the cross drilling and vertical drilling, the both ends of the spring is connect with steel plate, is contained inside the canvas
Iron wire, the canvas are fixed on the steel plate；
The slip casting machine includes motor, slip casting steel pipe, control valve, slurry can, spiral pushing device, three-legged support, pulp
Steel pipe and rotational speed governor, the slurry can are cylinder, and the motor is located at the top of slurry can, and the slip casting steel pipe is set
It is placed in slurry can upper side, the control valve, setting inside the slurry can are set between the Grouting Pipe and slurry can
The spiral pushing device, the spiral pushing device includes central spindle and to be fixedly arranged on central spindle side using its axis be rotary shaft along axial
Be threadingly advanced the helical blade that rear end is extended to from its front end, in the helical blade along with central spindle is closed is bonded, outer and storage
The closed fitting of tank shell is starched, a slot is correspondingly formed between the adjacent blade of helical blade and central spindle, entire helical blade is in central spindle
It is formed to extend to rear end face from its front end face and be connected to the spiral of front/rear end and leads matter slot, the three-legged support is located at slurry can
Lower part, the pulp steel pipe are set to slurry can bottom, are arranged control valve between the pulp steel pipe and slurry can, and described turn
Fast controller is arranged on slurry can surface.
2. a kind of gob side entry driving coal column hardened system according to claim 1, it is characterised in that: the grouting monitoring dress
It sets and is connect with the slip casting machine, the grouting monitoring device includes main grouting pipe, is installed on the main grouting pipe
There is a main inlet control valve, the main inlet control valve side is equipped with into slurry regulating valve, described into being connected with pressure gauge one, institute in slurry regulating valve
It states the main inlet control valve other side and blowing regulating valve is installed, pressure gauge two, the main Grouting Pipe are connected in the blowing regulating valve
Road is slurry-feeding hole into slurry regulating valve side, and the slurry-feeding hole is connect with the grout outlet of the slip casting machine, blowing regulating valve side
End is slurry outlet, and the slurry outlet is connected with slip casting hose.
3. a kind of gob side entry driving coal column hardened system according to claim 1, it is characterised in that: the coal column reinforces anchor cable
Arrangement are as follows: first row makes a call to three coal columns and reinforces anchor cable, and second row makes a call to two coal columns and reinforces anchor cable, so recycles, the coal
Array pitch is 1.5m × 1.5m between column reinforces anchor cable.
4. a kind of gob side entry driving coal column hardened system according to claim 1, it is characterised in that: the depth of the inlet well
Degree is the half of coal column.
5. a kind of application method of gob side entry driving coal column hardened system according to claim 2, which is characterized in that successively wrap
Include following steps:
A, anchor cable drilling is drilled at the coal column of gob side entry driving goaf side, the depth of the anchor cable drilling is to penetrate coal column；
B, the coal column reinforces anchor cable and penetrates coal column by anchor cable drilling, and the coal column reinforces the anchoring section of anchor cable, gear cash
Device is located in goaf, and the anchoring section that the coal column reinforces anchor cable is close to goaf side coal column wall；
C, the gangue stopping device is mounted in anchor cable drilling, and spring is in compressive state, and steel plate, canvas are tightly attached to air bag surrounding,
When gangue stopping device enters goaf, spring is flicked, and steel plate and canvas are opened therewith, is formed the shape of " umbrella ", is blocked with playing
The effect of goaf spoil；
D, the slip casting hose is connect with the slurry outlet, and the grout outlet is connect with the slurry-feeding hole；
E, start slip casting machine, so that slurry is reached suitable speed discharge by adjusting rotational speed governor, slurry is supervised by slip casting
It surveys in device injection air bag, during slip casting, observes pressure gauge one, two numerical value of pressure gauge, by adjusting main inlet control valve, being adjusted into slurry
Section valve, blowing regulating valve close slip casting machine when pressure gauge one, pressure gauge two reach specified value to control the flow of slurry,
Main inlet control valve is closed, slip casting is stopped；
F, it is reinforced between anchor cable drilling in the coal column and is drilled with inlet well, the inlet well depth is coal column half, is passed through
Slip casting machine carries out slip casting to the inlet well；
G, along tunnelling direction, coal column of successively constructing reinforces anchor cable, realizes that the coal column of entire working face is reinforced.
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| CN111396052A (en) * | 2020-02-18 | 2020-07-10 | 温州大学 | Method for mineralizing and reinforcing coal pillar by urease microorganisms |
| CN111814242A (en) * | 2020-07-16 | 2020-10-23 | 新疆工程学院 | Method and system for judging gob-side entry driving coal pillar width by using data of Internet of things |
| CN112267884A (en) * | 2020-10-27 | 2021-01-26 | 陕西煤业化工技术研究院有限责任公司 | Composite nano grouting sealing-based gob-side entry driving construction method for remaining small coal pillar |
| CN112922653A (en) * | 2021-03-16 | 2021-06-08 | 太原理工大学 | Small coal pillar overlapped grouting through anchor cable |
| CN113153394A (en) * | 2021-03-10 | 2021-07-23 | 中国矿业大学 | Self-expansion reinforced anchoring type anchor rod structure and method for narrow coal pillar along hollow crossheading end |
| CN113803087A (en) * | 2021-09-07 | 2021-12-17 | 山西晋煤集团技术研究院有限责任公司 | Small coal pillar gob-side entry driving broken surrounding rock grouting reinforcement method |
| AU2021277730A1 (en) * | 2020-10-29 | 2022-05-19 | China Coal Research Institute | Control method and control device for full-automatic pillar filling mining |
| CN116291396A (en) * | 2023-04-07 | 2023-06-23 | 徐州中矿岩土技术股份有限公司 | Method for monitoring goaf slurry migration and condensation in drilled holes in real time |
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| CN113153394A (en) * | 2021-03-10 | 2021-07-23 | 中国矿业大学 | Self-expansion reinforced anchoring type anchor rod structure and method for narrow coal pillar along hollow crossheading end |
| CN113153394B (en) * | 2021-03-10 | 2023-10-27 | 中国矿业大学 | Self-expansion reinforced anchoring type anchor rod structure and method for narrow coal pillar along-void gate way end |
| CN112922653A (en) * | 2021-03-16 | 2021-06-08 | 太原理工大学 | Small coal pillar overlapped grouting through anchor cable |
| CN113803087A (en) * | 2021-09-07 | 2021-12-17 | 山西晋煤集团技术研究院有限责任公司 | Small coal pillar gob-side entry driving broken surrounding rock grouting reinforcement method |
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