CN109882172A - A kind of cut falls the gob-side entry retaining method that roadside support wall is done on directly top - Google Patents
A kind of cut falls the gob-side entry retaining method that roadside support wall is done on directly top Download PDFInfo
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- CN109882172A CN109882172A CN201910274014.5A CN201910274014A CN109882172A CN 109882172 A CN109882172 A CN 109882172A CN 201910274014 A CN201910274014 A CN 201910274014A CN 109882172 A CN109882172 A CN 109882172A
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Abstract
The present invention provides a kind of gob-side entry retaining methods for cutting and falling directly top and doing roadside support wall, it is related to underground mining method technical field, step includes: A. in the rear of working face ended support installation gob side entry retaining bracket, and gob side entry retaining bracket includes supporting mechanism, borehole drill construction, descending mechanism and thrust gear；B. by the mobile gob side entry retaining bracket of hydraulic cylinder after working face coal cutting, by borehole drill construction to top plate drilling；C. powder charge and sealing of hole in drilling, are promoted below lifter plate to the top plate of descending mechanism；D. the top plate fallen above gob side entry retaining bracket is cut in explosion, transfers lifter plate；E. after lifter plate drops to bottom plate, thrust gear is pushed into the tunnel of gob side entry retaining by hydraulic jack by the top plate fallen is cut；F. gunite concrete at the top plate gap fallen is cut, repeating step A to step F terminates to back production；It solves the technical issues of complicated gob side entry retaining construction under the conditions of Mid-Hard Roof, low efficiency, in addition also has many advantages, such as that labor intensity is low, at low cost at lane.
Description
Technical field
The present invention relates to underground mining method technical field, especially a kind of blocking cut falls directly top and does roadside support wall
Gob-side entry retaining method.
Background technique
No coal pillar mining is conducive to improve coal recovery rate, while disaster caused by can also eliminating or reducing because of coal column,
It is widely adopted in recent years.With the quickening of resourse-depleting process, no coal pillar mining increasingly retrieves the weight of industry
Depending on.Gob side entry retaining is the important development direction of no coal pillar mining.Gob side entry retaining has non chain pillar entryprotection, improves coal resources extraction
Rate, extends mine service-life, is conducive to Mine Sustainable Development reasonable development coal resources；The lane gob side entry retaining Bian Jue is to stay
Tunnelling amount is reduced in lane, reduces the risk of bump and Gas Outburst；It realizes Y-shaped ventilation, avoids corner on working face
Angle gas accumulation is conducive to the safety in production in mine；Working face time is shortened, excavation replacement contradiction is alleviated, improves mine
Mountain production efficiency；It does not stay coal column to eliminate island working face and shortens moving time, reduce the influence of concentrated stress, be conducive to prevent
The advantages that fire only occurs, ensures mine safety production and improves mine technology economic benefit, is therefore widely used in coal mine
Without coal pillar mining field.
Can roadside support be that gob side entry retaining is successfully crucial, give full play to the advantage of gob side entry retaining with important shadow
It rings.Roadside support should play the role of bearing simultaneously, cut top, isolation.The roadside support wall form that China uses at present is a variety of
Multiplicity mainly includes spoil block (bag) wall, concrete block wall, concrete filling wall, high-water material filling wall, pier stud wall and steel
Pipe concrete wall etc..All there are certain drawbacks in various roadside supports, as the supporting of spoil block (bag) wall can the amount of contracting be big, labor intensity
Greatly, goaf air leaking is serious；Concrete intensity measuring metope faces building block weight, and labor intensity of workers is high, the disadvantage for time length of building a wall；
Concrete and the integrated poured roadside packing technology of high-water material need to establish a set of more complicated filling system, and cost is excessively high,
And there is a problem of that roadside support body early strength is low, demoulding time is long；Pier stud wall and steel tube concrete cob wall be easy to cause wall
Body stress raisers destroy the integrality of tunnel roof and floor, stay lane effect also undesirable.And above-mentioned gob side entry retaining mode is past
Toward there is also stay lane speed slow, it is difficult to adapt to the shortcomings that quickly propelling of fully-mechanized mining working.It therefore is the existing lane collateral branch of solution
Shield complex procedures, construction efficiency is low, labor intensity is high, long at the lane period and make the technical problems such as lane is at high cost, needs to existing
Some gob-side entry retaining methods are further to be improved.
Summary of the invention
To solve to make the low technical problem of roadside support wall complex procedures, construction efficiency during gob side entry retaining, this
Invention provides a kind of cut and falls the gob-side entry retaining method that roadside support wall is done on directly top, and specific technical solution is as follows.
A kind of cut falls the gob-side entry retaining method that roadside support wall is done on directly top, and step includes:
A. gob side entry retaining bracket is installed at the rear of working face ended support, leads between face end support and gob side entry retaining bracket
Hydraulic cylinder connection is crossed, the gob side entry retaining bracket includes supporting mechanism, borehole drill construction, descending mechanism and thrust gear；
B. it is drilled by borehole drill construction to top plate after working face coal cutting by the mobile gob side entry retaining bracket of hydraulic cylinder,
Drilling is arranged on the top plate above gob side entry retaining bracket；
C. powder charge and sealing of hole into drilling, are promoted below lifter plate to the top plate of descending mechanism；
D. the top plate fallen above gob side entry retaining bracket is cut in explosion, slowly transfers lifting using the traction electric machine of descending mechanism
Plate；
E. after lifter plate drops to bottom plate, thrust gear is pushed into gob side entry retaining for the top plate fallen is cut by hydraulic jack
In tunnel；
F. gunite concrete at the top plate gap fallen is cut, repeating step A to step F terminates to working face extraction.
Preferably, the supporting mechanism of gob side entry retaining bracket includes column, top beam and bottom beam, and top beam connects the upper of column
End, bottom beam connect the lower end of column；The borehole drill construction of gob side entry retaining bracket includes drill fixing support and drilling machine, and drilling machine is fixed on brill
On machine fixed frame, drill fixing support is slided along bottom beam；The descending mechanism of gob side entry retaining bracket includes lifter plate, pulley, wirerope
And traction electric machine, wirerope connect lifter plate and traction electric machine, pulley is arranged on top beam；The thrust gear of gob side entry retaining bracket
Including crossbeam and hydraulic jack, crossbeam is arranged between column, and hydraulic jack is arranged on crossbeam.
Preferably, connecting rod is additionally provided between bottom beam；The side of lifter plate is provided with waste rock blocking curtain；Four angles of lifter plate
It is respectively connected with wirerope, the end of hydraulic jack is provided with push plate.
Preferably, the every propulsion 1.5m~3m of working face cuts the top plate fallen above a gob side entry retaining bracket；The depth of drilling
Degree is H, according to formula H=h-l1-l2It determines, wherein h is head-room, l1For the amount of crushing, l2For gunite concrete thickness
Degree.
It is also preferred that the depth of drilling is equal to depth when directly pushing up each lift height, to drill along working face tendency
H, the depth along working face high drainage roadway are greater than H；The depth of drilling is less than or greater than when directly pushing up each lift height, along working face
The depth of tendency drilling is H, and the depth along working face high drainage roadway is H, and passes through perforating hydraulic pressure break or mechanical grooving water
Force the delamination-terrane for splitting and being parallel to top plate pressure break top plate；According to each lift height and distribution is directly pushed up, the depth of drilling is adjusted.
It may further be preferable that explosion is specially directional blasting, the splitting seam breakthrough form formed between drilling after directional blasting
At section, the top plate fallen above gob side entry retaining bracket is cut.
It may further be preferable that construction drill cuts the top plate fallen above gob side entry retaining bracket when directly top is tight roof；
The anchor pole that length is equal to H is set on the top plate above gob side entry retaining bracket when directly top is Mid-Hard Roof, before construction drill；Directly
When to connect top be loose roof, the anchor pole that length is equal to H is set before construction drill on the top plate above gob side entry retaining bracket, is being cut
After caving plate to cut fall block carry out slip casting.
It may further be preferable that transferring lifter plate close to the one of gob side entry retaining when lifter plate decline is less than 20cm away from bottom plate
Side tilts lifter plate.
It may further be preferable that the pitch of holes of top plate drilling is 15cm~30cm in step B；Lifter plate rises in step C
It is less than the position of 10cm away from top plate；The actuating length of thrust gear is 1~2m.
The beneficial effect comprise that
(1) provided by the invention cut falls the gob-side entry retaining method that roadside support wall is done on directly top, is taken on the spot using top plate
Material will cut the top plate block fallen and be pushed into do roadside support wall below the tunnel of gob side entry retaining, so as to avoid production lane collateral branch
The working procedures such as the transport and production that need during parapet wall body, reduce working procedure, improve into lane efficiency；In addition top plate
Lithology it is consistent with existing back lithology, will not because of supporting strength of wall body it is excessive caused by crowdion roof and floor, or
The problems such as failure of supporting caused by supporting strength of wall body is too small, to improve supporting effect.
(2) realize that cutting for top plate falls and push in face end support rear setting gob side entry retaining bracket to facilitate, using calmly
Cracking initiation section is split to blasting technique production, rock transition is avoided and is crushed, falls the height that ceiling height and top plate are layered when cutting
When degree difference is larger, by the upper edge for making supporting wall in top board construction perforating hydraulic pressure break；Gob side entry retaining bracket is stood
Column holder securely connects that face end support is followed to promote, thus the production of complete job face gob-side entry retaining roadside support wall.
(3) depth of reasonable design drilling is to make sizeable roadside support wall, according to roof strata
Delamination can suitably adjust the depth of drilling, to reduce construction；By appropriate according to the firmness change situation of top plate
Carrying out simple supporting to top plate thereby may be ensured that the problems such as cutting the integrality of caving plate, preventing supporting wall from leaking out；
Lifter plate inclination can more easily move the supporting wall made by top plate.
In addition the present invention, which also has, promotes rear goaf top plate to be caving, and reduces goaf lateral-supporting pressure, is conducive to lane
Road maintenance, it is at low cost at lane the advantages that.
Detailed description of the invention
Fig. 1 is the drilling construction schematic diagram directly pushed up；
Fig. 2 is the construction schematic diagram cut after falling directly top；
Fig. 3 is to cut to fall the construction schematic diagram that roadside support wall is done on directly top；
Fig. 4 is the arrangement side structure schematic view of face end support and gob side entry retaining bracket；
Fig. 5 is drilling splitting seam communicating structure schematic diagram；
In figure: 1- supporting mechanism；11- column；12- top beam；13- bottom beam；2- borehole drill construction；3- descending mechanism；31- lifting
Plate；32- pulley；33- wirerope；4- thrust gear；5- face end support；51- hydraulic cylinder；The goaf 6-；The lane of 7- gob side entry retaining
Road；8- drilling；9- supporting wall.
Specific embodiment
In conjunction with shown in Fig. 1 to Fig. 5, a kind of cut provided by the invention falls the gob side entry retaining side that roadside support wall is done on directly top
Method specific embodiment is as follows.
Embodiment 1
It is a kind of cut fall directly top do roadside support wall the specific construction procedure of gob-side entry retaining method it is as follows:
Step A. installs gob side entry retaining bracket, face end support 5 and gob side entry retaining bracket at the rear of working face ended support
Between connected by hydraulic cylinder 51, the shifting frame of gob side entry retaining bracket is promoted by hydraulic cylinder 51, and gob side entry retaining bracket includes support
Mechanism 1, borehole drill construction 2, descending mechanism 3 and thrust gear 4, as shown in Figure 4.
Wherein, the supporting mechanism 1 of gob side entry retaining bracket includes column 11, top beam 12 and bottom beam 13, and protection top plate, which is cut, to be fallen
Construction space, top beam 12 connect the upper end of column, and bottom beam 13 connects the lower end of column 11, and supporting mechanism 1 is provided with 4 root posts
11, it is combined with top beam 12 and bottom beam 13 in rectangular body frame.In addition, hydraulic cylinder can be passed through between front-seat column and heel row column
Connection, so as to adjust the length of front two rows column, to adapt to the different constructions cut under the step pitch of top；Wherein front-seat column
For close to same row's column of face end support side, heel row column is 2 root posts of the other side；The width of gob side entry retaining bracket be by
Nearly tunnel side is with the column of row and to the distance between heel post.The borehole drill construction 2 of gob side entry retaining bracket is fixed including drilling machine
Frame and drilling machine can complete top plate drilling, and drilling machine is fixed on drill fixing support, and drill fixing support is slided along bottom beam.It is stayed along sky
The descending mechanism 3 of lane bracket includes lifter plate 31, pulley 32, wirerope 33 and traction electric machine, and it is slow can will to cut the top plate that falls
To bottom plate, wirerope 33 connects lifter plate 31 and traction electric machine for decentralization, and pulley 32 is arranged on top beam 12.Gob side entry retaining bracket
Thrust gear 4 includes that crossbeam and hydraulic jack will cut the top plate fallen and push to formation roadside support wall in the tunnel of gob side entry retaining
Body, crossbeam are arranged between column, and hydraulic jack is arranged on crossbeam.
In addition, it is additionally provided with connecting rod between bottom beam 13, it is further to reinforce gob side entry retaining bracket.It further can be only
Top beam 12 is being set between the column that working face moves towards, so that the length for guaranteeing that top plate is moved towards along working face on direction meets need
It asks.The side of lifter plate 31 is provided with waste rock blocking curtain, and waste rock blocking curtain is specifically the door curtain knot of extendible up and down being made of cross bar and networking
Structure, waste rock blocking curtain decline with lifter plate, and networking is provided between cross bar, to ensure that whole stability, it is therefore prevented that part rock
Stone disintegrating slag avalanche is hurted sb.'s feelings, and is prevented from cutting the top plate fallen and be toppled over during lower section.Four angles of lifter plate 31 are respectively connected with steel wire
Rope 33, four wirerope are drawn by different traction electric machines respectively, so as to control the inclination at an angle of lifter plate 31.
The end of hydraulic jack is provided with push plate, so that thrust gear be facilitated smoothly to push the top plate cut and fallen.
By the mobile gob side entry retaining bracket of hydraulic cylinder after step B. working face coal cutting, top plate is carried out by borehole drill construction 2
Drilling, the arrangement drilling 8 on the top plate above gob side entry retaining bracket, wherein the pitch of holes of top plate drilling 8 is 15cm~30cm, such as
Shown in Fig. 1.
The every propulsion 1.5m~3m of working face cuts the top plate fallen above a gob side entry retaining bracket, and the height for cutting caving plate is less than
The height of gob side entry retaining bracket upright post cuts the length of caving plate less than the length between front two rows column, cuts the width of caving plate
Degree is less than the width of gob side entry retaining bracket.The depth of drilling is H, according to formula H=h-l1-l2It determines, wherein h is head-room,
l1For the amount of crushing, l2For gunite concrete thickness.
The depth of drilling 8 is equal to when directly pushing up each lift height, and the depth along working face tendency drilling is H, along working face
The depth of high drainage roadway is greater than H；The depth of drilling drills less than or greater than when directly pushing up each lift height along working face tendency
Depth is H, and the depth along working face high drainage roadway is H, and parallel by perforating hydraulic pressure break or mechanical grooving hydraulic fracturing
In the delamination-terrane of top plate pressure break top plate；According to each lift height and distribution is directly pushed up, the depth of drilling is adjusted, meter is mainly worked as
When the drilling depth of calculation and direct Top slice thickness difference are no more than 25cm, using each lift height of roof strata it is the sum of cumulative as
The value of drilling depth falls to cut top plate behind top and can directly separate from layering place.
When directly top is tight roof, wherein tight roof is strength of roof index greatly with 120, and caving angle is big
In the roof strata of 20m；Such more hard rock stratum is to need to encrypt drilling arrangement, therefore cut in construction drill and fall edge in construction
Top plate above the bracket of the lane Kong Liu, after drillhole blasting forms crack, top plate directly falls and in complete blocky.Directly top is
When resisting plate stubbornly, wherein Mid-Hard Roof be rock strength it is moderate, intensity index less than 120 but be greater than 80 rock stratum, such rock stratum
The anchor pole that length is equal to H is set on the top plate above gob side entry retaining bracket before construction drill.When directly top is loose roof,
Wherein loose roof be strength of roof it is low, top plate is easily broken and occurs the rock stratum in crack, it is therefore desirable to weakness top plate into
Row is reinforced, and the anchor pole that length is equal to H is arranged before construction drill on the top plate above gob side entry retaining bracket, right after cutting caving plate
It cuts and falls block progress slip casting, to guarantee the integrality of top plate entirety.
At 5 rear of face end support, setting gob side entry retaining bracket realizes that cutting for top plate falls and push to facilitate, and utilizes orientation
Cracking initiation section is split in blasting technique production, is avoided rock transition and is crushed, as shown in Figure 5.Ceiling height and top plate are fallen when cutting
When the height difference of layering is larger, by the upper edge for making supporting wall in top board construction perforating hydraulic pressure break.
Step C. powder charge and sealing of hole into drilling 8, are promoted below lifter plate to the top plate of descending mechanism, according to explosion needs
Loaded length is designed, explosive payload is selected according to the lithology of roof strata, and powder charge need to meet the needs of directional blasting, and will
Lifter plate rises to the position for being less than 10cm away from top plate.
The top plate fallen above gob side entry retaining bracket is cut in step D. explosion, is slowly transferred using the traction electric machine of descending mechanism 3
Lifter plate, as shown in Figure 2.
Explosion is specially directional blasting, and the splitting seam formed between drilling after directional blasting is formed through section, cuts and falls along sky
The top plate above the bracket of lane is stayed, since the distance of lifter plate and top plate is smaller, so the top plate to fall will not generate lifter plate
Biggish impact can guarantee the stability of gob side entry retaining bracket entirety.
After step E. lifter plate drops to bottom plate, thrust gear 4 is pushed into the top plate fallen is cut along sky by hydraulic jack
It staying in the tunnel in lane, the actuating length of thrust gear 4 is 1~2m, the top plate fallen will be cut and pushed in the tunnel 7 of gob side entry retaining,
Roadside support wall 9 is formed, as shown in Figure 3.
When the decline of lifter plate 31 is less than 20cm away from bottom plate, transferring lifter plate 31 close to the side of gob side entry retaining makes lifter plate 31
Inclination, more easily slides to tunnel so that cutting on lifter plate be made to fall roof rock.
Step F. cuts gunite concrete at the top plate gap fallen, using the big concrete of contractibility, to adapt to stay along sky
The big situation of lane roadway deformation amount, repeating step A to step F terminates to working face extraction.
This method is gathered materials on the spot using top plate, will be cut the top plate block fallen and is pushed into Zuo Xiang collateral branch below the tunnel of gob side entry retaining
Parapet wall body 9 reduces and applies so as to avoid working procedures such as the transports and production needed during production roadside support wall 9
Work process improves into lane efficiency；In addition the lithology of top plate is consistent with existing back lithology, will not be because of supporting wall
The problems such as failure of supporting caused by crowdion roof and floor caused by intensity is excessive or supporting strength of wall body are too small, to improve
Supporting effect.
In addition the present invention direct top also hard with lateral cut, so that rear goaf top plate be promoted to be caving；It cuts and falls
Goaf lateral-supporting pressure is reduced after top plate；It is conducive to roadway maintenance using top plate as lane side；It is derived from top plate at lane material,
Directly cutting top, to be moved into lane at low cost.
Embodiment 2
The construction technology for falling the gob-side entry retaining method that roadside support wall is done on directly top is cut, for further instruction with certain mine
For 1310 working faces, the present invention is described in further detail.1310 working face master of the mine adopts 3 coal seams, coal seam thickness
2.8m, coal seam layer position are stablized, and thickness change is little.Roof strata is packsand, belongs to Mid-Hard Roof, and stope drift active workings are dug the bottom of along
Into section configuration is rectangle, and working face is carried out using the method for gob side entry retaining without coal pillar mining.It is fallen by the direct lane Ding Zuo using cutting
The gob-side entry retaining method of supporting wall is exploited, and construction procedure includes:
Step A. installs gob side entry retaining bracket at the rear of working face ended support, face end support and gob side entry retaining bracket it
Between connected by hydraulic cylinder, the shifting frame of gob side entry retaining bracket is by hydraulic cylinder propulsion, and wherein gob side entry retaining bracket includes support machine
Structure 1, borehole drill construction 2, descending mechanism 3 and thrust gear 4.Supporting mechanism 1 is for protecting top plate to cut the construction space fallen, drilling machine
Structure 2 is slowly transferred the top plate fallen is cut to bottom plate for completing top plate drilling construction, descending mechanism 3；Thrust gear 4 will be cut and be fallen
Top plate, which pushes to, forms roadside support wall 9 in the tunnel of gob side entry retaining.
The every knife drilling depth of step B. working face coal cutting is 0.8m, mobile by hydraulic cylinder after 3 circulations are completed in working face coal cutting
Gob side entry retaining bracket drills to top plate by borehole drill construction 2, the arrangement drilling 8 on the top plate above gob side entry retaining bracket,
In conjunction with roof conditions, select the pitch of holes of top plate drilling for 20cm.Wherein when cutting top plate for the first time, need in top plate along edge
The inward flange of the lane Kong Liu rack upper surface is evenly arranged drilling.The height for cutting caving plate is less than the height of gob side entry retaining bracket upright post
Degree cuts the length of caving plate less than the length between front two rows column, and the width for cutting caving plate is less than gob side entry retaining bracket
Width.The depth of drilling is 2.6m, determines that wherein head-room is according to formula H=2.8m-0.12m-0.08m=2.6m
2.8m, the amount of crushing 0.12m, gunite concrete is with a thickness of 0.08m.Since the sum of the thickness for directly pushing up each layer is exactly
2.6m guarantees that the tilt angle error of drilling is not more than 5 ° when drilling so arranging drilling by the drilling depth of 2.6m.Design is cut
The size of caving plate is 1.5 × 2.4 × 2.6m, due to directly pushing up as Mid-Hard Roof, in gob side entry retaining bracket before construction drill
Anchor pole 3 that length is equal to 2.6m are arranged on the top plate of top, three anchor poles are arranged on the central axes for cutting top region and uniformly arrange
Cloth.
Step C. powder charge and sealing of hole into drilling 8, are promoted below lifter plate to the top plate of descending mechanism, according to explosion needs
Loaded length is designed, explosive payload is selected according to the lithology of roof strata, and powder charge need to meet the needs of directional blasting, and will
Lifter plate 31 rises to the position for being less than 10cm away from top plate.
The top plate fallen above gob side entry retaining bracket is cut in step D. explosion, is slowly transferred using the traction electric machine of descending mechanism 3
Lifter plate, decrease speed are less than 0.05m/s.
Explosion is specially directional blasting, and the splitting seam formed between drilling after directional blasting is formed through section, cuts and falls along sky
The top plate above the bracket of lane is stayed, since the distance of lifter plate 31 and top plate is smaller, so the top plate to fall will not produce lifter plate
Raw biggish impact, can guarantee the stability of gob side entry retaining bracket entirety.
After step E. lifter plate 31 drops to bottom plate, thrust gear is pushed into the top plate fallen is cut along sky by hydraulic jack
It staying in the tunnel in lane, the actuating length of thrust gear 4 is 1.5m, when the decline of lifter plate 31 is less than 20cm away from bottom plate, decentralization lifting
Plate tilts lifter plate close to the side of gob side entry retaining, more easily slides so that cutting on lifter plate be made to fall roof rock to lane
In road, roadside support wall 9 is formed.
Step F. cuts gunite concrete at the top plate gap fallen, using the big concrete of contractibility, to adapt to stay along sky
The big situation of lane roadway deformation amount, repeating step A to step F terminates to working face extraction.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (9)
1. a kind of cut falls directly top and does the gob-side entry retaining method of roadside support wall, which is characterized in that step includes:
A. gob side entry retaining bracket is installed at the rear of working face ended support, passes through liquid between face end support and gob side entry retaining bracket
Cylinder pressure connection, the gob side entry retaining bracket includes supporting mechanism, borehole drill construction, descending mechanism and thrust gear；
B. it is drilled by borehole drill construction to top plate, by the mobile gob side entry retaining bracket of hydraulic cylinder on edge after working face coal cutting
Drilling is arranged on top plate above the bracket of the lane Kong Liu；
C. powder charge and sealing of hole into drilling, are promoted below lifter plate to the top plate of descending mechanism；
D. the top plate fallen above gob side entry retaining bracket is cut in explosion, slowly transfers lifter plate using the traction electric machine of descending mechanism；
E. after lifter plate drops to bottom plate, tunnel that thrust gear will be cut the top plate fallen and be pushed into gob side entry retaining by hydraulic jack
It is interior；
F. gunite concrete at the top plate gap fallen is cut, repeating step A to step F terminates to working face extraction.
2. a kind of cut according to claim 1 falls the gob-side entry retaining method that roadside support wall is done on directly top, feature exists
In the supporting mechanism of the gob side entry retaining bracket includes column, top beam and bottom beam, and the upper end of the top beam connection column is described
The lower end of bottom beam connection column；
The borehole drill construction of the gob side entry retaining bracket includes drill fixing support and drilling machine, and the drilling machine is fixed on drill fixing support
On, the drill fixing support is slided along bottom beam；
The descending mechanism of the gob side entry retaining bracket includes lifter plate, pulley, wirerope and traction electric machine, the wirerope connection
Lifter plate and traction electric machine, the pulley are arranged on top beam；
The thrust gear of the gob side entry retaining bracket includes crossbeam and hydraulic jack, and the crossbeam is arranged between column, liquid
Jack is pressed to be arranged on crossbeam.
3. a kind of cut according to claim 2 falls the gob-side entry retaining method that roadside support wall is done on directly top, feature exists
In being additionally provided with connecting rod between the bottom beam；The side of the lifter plate is provided with waste rock blocking curtain；Four angles of the lifter plate are equal
It is connected with wirerope, the end of the hydraulic jack is provided with push plate.
4. a kind of cut according to claim 1 falls the gob-side entry retaining method that roadside support wall is done on directly top, feature exists
In the every propulsion 1.5m~3m of working face cuts the top plate fallen above a gob side entry retaining bracket；The depth of the drilling is H,
According to formula H=h-l1-l2It determines, wherein h is head-room, l1For the amount of crushing, l2For gunite concrete thickness.
5. a kind of cut according to claim 4 falls the gob-side entry retaining method that roadside support wall is done on directly top, feature exists
In for the depth of the drilling equal to when directly pushing up each lift height, the depth along working face tendency drilling is H, is walked along working face
It is greater than H to the depth of drilling；The depth of the drilling is inclined to along working face and drills less than or greater than when directly pushing up each lift height
Depth be H, the depth along working face high drainage roadway is H, and flat by perforating hydraulic pressure break or mechanical grooving hydraulic fracturing
Row is in the delamination-terrane of top plate pressure break top plate；According to each lift height and distribution is directly pushed up, the depth of drilling is adjusted.
6. a kind of cut falls the gob-side entry retaining method that roadside support wall is done on directly top according to claim 1 or 5, feature
It is, the explosion is specially directional blasting, and the splitting seam formed between drilling after directional blasting is formed through section, cuts and falls along sky
Stay the top plate above the bracket of lane.
7. a kind of cut according to claim 6 falls the gob-side entry retaining method that roadside support wall is done on directly top, feature exists
In, it is described directly top be tight roof when, construction drill cuts the top plate fallen above gob side entry retaining bracket；The direct top be in it is hard
The anchor pole that length is equal to H is set on the top plate above gob side entry retaining bracket when top plate, before construction drill；The directly top is soft
The anchor pole that length is equal to H is set on the top plate above gob side entry retaining bracket when weak top plate, before construction drill, after cutting caving plate
Block progress slip casting is fallen to cutting.
8. a kind of cut according to claim 1 falls the gob-side entry retaining method that roadside support wall is done on directly top, feature exists
In when the lifter plate decline is less than 20cm away from bottom plate, transferring lifter plate tilts lifter plate close to the side of gob side entry retaining.
9. a kind of cut according to claim 1 falls the gob-side entry retaining method that roadside support wall is done on directly top, feature exists
In the pitch of holes of top plate drilling is 15cm~30cm in the step B；Lifter plate rises in the step C is less than away from top plate
The position of 10cm；The actuating length of the thrust gear is 1~2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274014.5A CN109882172B (en) | 2019-04-08 | 2019-04-08 | Gob-side entry retaining method by using cut-off direct roof as roadside support wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274014.5A CN109882172B (en) | 2019-04-08 | 2019-04-08 | Gob-side entry retaining method by using cut-off direct roof as roadside support wall |
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| Publication Number | Publication Date |
|---|---|
| CN109882172A true CN109882172A (en) | 2019-06-14 |
| CN109882172B CN109882172B (en) | 2020-07-07 |
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| CN201910274014.5A Active CN109882172B (en) | 2019-04-08 | 2019-04-08 | Gob-side entry retaining method by using cut-off direct roof as roadside support wall |
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| CN116971817A (en) * | 2023-09-25 | 2023-10-31 | 太原理工大学 | High-gas working face ventilation method for alternately entering and returning air in gallery |
| CN118110548A (en) * | 2024-03-05 | 2024-05-31 | 河南龙宇能源股份有限公司 | Active reinforcing supporting device for gob-side entry retaining of coal mine |
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| CN118110548A (en) * | 2024-03-05 | 2024-05-31 | 河南龙宇能源股份有限公司 | Active reinforcing supporting device for gob-side entry retaining of coal mine |
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| CN109882172B (en) | 2020-07-07 |
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