CN102865102A - Self-flowing concrete convex and concave self-connection filling method - Google Patents
Self-flowing concrete convex and concave self-connection filling method Download PDFInfo
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Abstract
The invention relates to coal mine gas control, and provides a self-flowing concrete convex and concave self-connection filling method which solves the problem of cracking of a wall body of a filling wall. The self-flowing concrete convex and concave self-connection filling method comprises steps of (1) moving a rack, supporting the rear of the rack and cleaning; (2) erecting a formwork; (3) conveying, storing, conveying and feeding filling materials; (4) filling; (5) flushing a filling pump and a filling pipeline; and (6) solidifying a filling wall body. The filling wall body is further required to be reinforced externally and internally. By the filling technique, the supporting strength of the wall body can be strengthened, a phenomenon of later-stage wall body cracking is thoroughly eliminated, and gas leakage is stopped.
Description
Technical field
The present invention relates to control of coalmine gas, specifically tunnel gob side entry retaining placement method.
Background technology
As everyone knows, reserved coal pillar is the lane method of protecting traditional in the colliery.Traditional stay coal column to protect the lane method to be between upper curtate haulage way and lower curtate tailgate, to stay the coal column (the wide general 10-30m of coal column) of establishing one fixed width, to make the lower curtate gallery avoid fixed bearing pressure peak district.District sublevel entry two lanes driving and use, technical management is simple, to ventilation, transportation, draining, all favourable safely.But loss of coal pillar is up to 10%-30%; And return airway is subjected to the secondary mining influence, the roadway maintenance difficulty, and the supporting expense is high; The easy methane accumulation of upper corner, easily cause and have a strong impact on normal production by gas exceeding limit; Abutment pressure is propagated to base plate, not only affects the exploitation of adjacent coal seam and stablizing of base plate tunnel, also becomes the hidden danger that causes bump.
Edge air gallery technology can be realized non chain pillar entryprotection preferably, no matter be to utilize on the coal resources, or on coal-mining method, all have better technology economy advantage than staying coal column to protect the lane, thereby, in the most of mining area of China, edge air gallery technology is used commonplace.
1, edge air gallery technology is conducive to solve the face gas problem, and the work plane safe coefficient is increased substantially.Tradition " U+L " type draft type is traversed firedamp drainage by gas-removing, utilizes the goaf to ventilate, and not only causes goaf gas to pour out, and causes upper corner to the gas-removing section of traversing gas density to be in the blast critical condition.Adopt gob side entry retaining, can realize " Y " type draft type, change the goaf gas working line, reduce the disturbance to the deep goaf gas, suppress gushing out of goaf gas, solved the problem of upper corner to the gas-removing section of traversing and tail lane gas exceeding limit.
2, realize without coal pillar mining, improve coal recovery rate, prolong mine service-life.It is more to collect blue ore deposit Coal Pillar Design, and coal resources waste is serious.According to incompletely statistics, collect blue ore deposit every back production 2000m work plane, because of reserved coal pillar loss high-quality coking coal resource 19.5 ten thousand t, about 100,000,000 yuan of resources loss.Implement edge air gallery technology, can effectively reclaim this part resource.
3, solve the nervous problem of linking of producing.Tradition " U+L " type draft type will devote considerable time and prepare new coal-face.And the employing of gob side entry retaining technique has reduced the tunnelling amount in a large number, makes gob side entry continue the next work plane of service; In addition, the excavation work amount reduces in a large number, is conducive to work plane and consists of in advance, for gas pumping provides sufficient time and space, can fundamentally solve and adopt, digs, takes out the nervous problem of linking, makes mine adopt, dig, take out the engineering linking and steps into positive cycle.
4, implement gob side entry retaining " Y " type draft type, for the optimization of extraction borehole arrangement parameter provides very favourable condition, improved extracting result, thereby given full play to the ability of mine extraction system.Reduce simultaneously wind gas-removing amount, greatly alleviated the pressure of mine ventilation system.In addition, implement gob side entry retaining, eliminated the hidden danger of anchor cable, anchor pole fracture in the goaf.
The basic mode of gob side entry retaining is with upper curtate work orbit of flates crossheading (or belt crossheading), gives over to the air return way of lower curtate work plane, and namely a tunnel can obtain twice utilization, as shown in Figure 1.After upper work plane is adopted, its track crossheading (or belt crossheading) is safeguarded with special support material, make this tunnel that remains as the return airway of lower curtate work plane, build the filling wall in the tunnel that remains by laying bricks or stones.The problem that exists at present is the continuous propelling along with work plane, and it is not tight to stay the lane to exist the body of wall top to connect the top, and filled wall is subjected to the various factors such as roof pressure, causes local wall crazing, leaks goaf gas.
Summary of the invention
The objective of the invention is to solve the problem of filling wall wall crazing, provide a kind of gravity flow concrete convex-concave from connecting placement method.
For achieving the above object, the technical solution used in the present invention is:
Gravity flow concrete convex-concave comprises step from connecting placement method:
(1) move supporting behind frame, the frame, cleaning,
During the advance of the face, connection double-level-metal net before rear pattern plate support and side falsework; The rear pattern plate support is every to 0.8m step pitch of reach, supporting roof above across pitch use cross-arm on the rear pattern plate support is erected at filling template, spacing 0.8m; Work plane whenever moves three step pitches of frame, and filling once; Before the filling, the filling space foreign material are cleaned out, handed over the arrangement of space roof and floor smooth;
(2) formwork erection,
Adopt roadside packing side template, roadside packing rear pattern plate and side support template, adjust filling template after, the filling pipeline is set up, prepare to carry out filling; Paste Polypropylence Sheet three templates, the surplus of 500mm is reserved at two ends up and down, and the lower end fastens with slag stone, and the upper end is pricked on the wire lath at top; Form protruding and/or recessed surface on the roadside packing rear pattern plate;
(3) transportation of filler, accumulating and material-uploading style,
The gob side entry retaining filler adopts the mine car transportation, transports to filling pumping plant bedding plant, and logical charging equipment is transported to concrete pump again, is delivered to the filling position by the filling pipeline;
(4) filling,
When filling begins, pumping clear water at first, the back then is the coarse fodder filling immediately following the fines pumping, and the space of filling mould top 0.5m height is the fines filling, and after fines charged, adding clear water carried out pipeline-cleaning; Evenly pre-buried two arrange 6 L-type round steel in upper filled wall center, before next body of wall filling that its exposed parts is stretching, be used for connecting new and old two obturations.
(5) flushing filling pump and filling pipeline,
After filling operation is finished, carry out the cleaning of the filling pipeline of filling pump;
(6) filled wall solidifies;
To have after the filling to be no less than 4 hours setting time, guarantee that bearing capacity reaches more than the 2MPa, re-move again, adjust filling support and template.
The roadside packing technology mainly comprises roadside packing system, filling process and working procedure.The present invention adopts the filling support satisfy the roadside packing requirement, automatically forms the filling space and the obturation during fixed is played a protective role.Form protruding and/or recessed surface on the roadside packing rear pattern plate, make to form staggered mating face between a filled wall and next filled wall, strengthened the support strength of body of wall.
In order further to strengthen the support strength of body of wall, can further carry out external reinforcement and interior reinforcing to filled wall.
To the external reinforcement of filled wall, (1) moves towards to arrange three row's carriages along the tunnel on filled wall, and per two carriages dock, and adopt anchor pole, steel mesh reinforcement combined supporting, and the anchor pole spacing is 900mm, and array pitch is 800mm; (2) spray thin-lift concrete sealing filled wall surface, jetting thickness 50mm; The weight concrete proportioning is cement: yellow sand: stone=1:2:2.
Interior reinforcing to filled wall, in the filling mould, lay steel mesh reinforcement before the filling, place altogether 5 steel mesh reinforcements in the filled wall, (1) helps and three steel mesh reinforcements of backplane perpendicular to track crossheading two, be that 16mm, length are that the screw-thread steel of 2100mm couples together three steel mesh reinforcements at the middle part of steel mesh reinforcement and apart from each 300mm place of roof and floor with diameter, wherein the steel mesh reinforcement spacing is 1000mm, every each 200mm of net distance two face die plates; (2) be parallel to track crossheading two and help to arrange two steel mesh reinforcements, and with iron wire it is connected with before three steel mesh reinforcements.
Adopt filling process method of the present invention, can strengthen wall support intensity, thoroughly shutoff later stage wall crazing is stopped the gas leakage phenomenon.
Description of drawings
Fig. 1 is gob side entry retaining basic skills schematic diagram.
Fig. 2 is process chart of the present invention.
Fig. 3 is roof timbering floor map of the present invention.
Fig. 4 is the I-I ' sectional drawing at rear pattern plate support place among Fig. 3.
Fig. 5 is the II-II ' sectional drawing at side falsework place among Fig. 3.
Fig. 6 is anchor band net supporting plan view.
Fig. 7 is perpendicular to the arrangement of three steel mesh reinforcements of track crossheading and base plate in the obturation.
Among the figure, 1-filled wall, 2-rear pattern plate support, 3-side falsework, 4-side support template, 5-double-level-metal net, 6-monomer H shaped steel shack, 7-plate-girder, 8-joist, 9-anchor pole, 10-steel mesh reinforcement, 11-screw-thread steel.
The specific embodiment
The roadside packing technology mainly comprises roadside packing system, filling process and working procedure and Surrounding Rock Control.Surrounding Rock Control comprises the strong supporting that adds in tunnel during the reinforcing of supporting in the lane of gob side entry retaining, obturation and the mining influence.
One, working procedure may further comprise the steps (process chart is seen Fig. 2):
1, moves supporting behind frame, the frame, cleaning
(1) for filling section top board after guaranteeing coal cutting is complete, during the advance of the face, connection double-level-metal net (5000 * 1000mm) before side falsework, rear pattern plate support.The wire lath lap length is not less than 0.2m, and two layers of mesh is wrong apart from being 0.2m, and net button spacing is 0.2m, adopts the 14# iron wire to connect.
(2) every to a reach step pitch (0.8m) when the rear pattern plate support, on the rear pattern plate support, across pitch uses Ф 20mm * 3.0m plate-girder 7 to do cross-arm, is erected at filling and touches plate top supporting roof, plate-girder 7 spacing 0.8m; If roof cracking can reduce the round log spacing and increase its quantity.
(3) this work plane whenever moves three step pitches of frame, and filling once; Such as the roof cracking section, also can take two step pitches or a step pitch filling once depending on field condition.Before the filling, the filling space foreign material must be cleaned out, and this space roof and floor arrangement is smooth, and head-room is not less than 3.5m.
2, formwork erection
Shown in Fig. 3,4,5, work plane adopts the roadside packing side template be fixed on the side falsework, is fixed in roadside packing rear pattern plate and hydraulic pressure side support template on the rear pattern plate support, form protruding and/or recessed surface on the roadside packing rear pattern plate, the support mechanical formwork erection that moves forward voluntarily.Before the filling, it is in shape to adjust three templates; After adjusting filling template, the filling pipeline is set up, prepare to carry out filling.
By the requirement reinforcement placing net of filled wall 1 interior reinforcing, by the gas drainage under suction requirement that the extraction built-in pipe is sealed at both ends in the filling mould, and be erected on the steel mesh reinforcement of solidifying fills body of wall 1.
For the demoulding after preventing the slip leakage and being convenient to filling, paste two anti-Polypropylence Sheets in three templates of mechanical mould, the surplus of 500mm is reserved at two ends up and down, and the below fastens with slag stone, and the above pricks on the wire lath at top.To note each space good seal of formwork erection corner when pasting colour bar cloth, prevent that slip from leaking.The sealing of simultaneously attention personnel import and export.
3, the transportation of filler, accumulating and material-uploading style
The gob side entry retaining filler adopts the mine car transportation, transports to filling pumping plant bedding plant, by mechanical charging equipment, is delivered directly to concrete pump again, is delivered to the filling position by Ф 108mm filling pipeline.Because each stowing interval is 2.4m, fill volume 21m
3, consuming about filler 45t, filling 2.5 hours was prepared ending each 1 hour, adopted the Special worm distributor material loading.
4, filling
Check and determine that the concrete filling working conditions of pump is normal, after pipeline is unimpeded, can carries out the stirring of material and carry; Charging is wanted evenly continuously, and water/binder ratio will be strictly controlled in water distribution; Note operating pressure and the situation of facilities for observation, the pipeline blockage hard stop is processed.
The operation that filling slurry is carried is as follows: when filling began, at first the pumping clear water guaranteed that pipeline is unimpeded, and the back is immediately following 0.5m
3Fines (cement, fly ash content are high, and fine sand, stone content are low) pumping, then be coarse fodder (stone content is normal) filling, the space of filling mould top 0.5m height is the fines filling, its volume is 3m
3After fines charges, add clear water and carry out pipeline-cleaning, finish until clean.When the lotion concrete material enters the filling mould, observe the advection of material and pile up situation, material will be full of filling template and fully connect the top.
For the differential settlement because of base plate between the obturation that prevents different stowing intervals produces the leakage that the slit causes goaf gas, the even round steel of 6 L-type Ф 20 * 2000mm of pre-buried two rows (3 of every rows, array pitch 0.6m, go up the about 1m of a root distance top board most, L-type round steel angle is 120 °) in a upper filled wall 1 center, before next body of wall filling that its exposed parts is stretching, be used for connecting new and old two obturations.
The processing of pipeline jam accident: in the experimental stage of carrying out filling, the generation of pipeline jam accident is commonplace, after operating personnel have been familiar with the performance of material and system and have had certain experiences, will be greatly improved, but must deal carefully with the plugging problem at duration of test.Because but the pump time of this filling slurry only had about half an hour, in a single day therefore plugging occuring must process immediately, otherwise slip fixed rear very difficult processing in pipeline.The method of processing is: each segment pipe is dismantled in immediately segmentation after the plugging, with clear water the slip in each segment pipe is developed, in order to strive for the processing time, the cleaning of each section pipeline should be carried out simultaneously, like this can be within the shortest time clear and coherent pipeline, reduce to greatest extent the impact on producing.
5, flushing filling pump and filling pipeline
After filling operation is finished, carry out the cleaning of filling pump and filling pipeline.
(1) cleaning of filling pump: with clear water pump is inside and outside washed and to be brushed one times.
(2) cleaning of filling pipeline: the pump feed hopper at the filling pump increases the clear water feed pipe, and water supply capacity is greater than 30m
3/ h, the pipeline-cleaning water before and after the filling all enters the ditch.
(3) sweep filling pumping plant sanitation of environment.
6, filled wall solidifies
In order to make filled wall bodies of gob-side retained entries 1 can reach quality requirement, to guarantee during filling that each filling buttress fully contacts with roof and floor, filling support and template will keep transfixion, in addition because the solidifying the time that needs at least 4h of filler, so guarantee to be no less than 4 hours setting time, guarantee that bearing capacity reaches more than the 2MPa, re-moves, adjusts filling support and template again.
The main stowage unit of gob side entry retaining filling construction sees Table 1.
The main stowage unit tabulation of table 1 gob side entry retaining
The concrete filling pump is totally two covers (using a cover, a cover for subsequent use), a filling pipeline.Filling pump, gauge tap and cable arrangements are on flat car, and the filling pump is arranged in the 150m place nearer apart from work plane; Stand by pump is placed on apart from work plane 160m place; Along with working face extraction, improving constantly of the improvement of track crossheading condition, worker's skilled operation degree strengthens the distance of filling pump and work plane gradually, finally is controlled in 200 ~ 300m.The filling pump is by the winch tethered sliding.100 1.5 tons of mine cars are used for the transportation compound.
The layout of filling pipeline be connected, filling supervisor be the seamless steel pipe of external diameter Ф 108mm, its wall thickness is not less than 6mm, the length of single tube is 2.5m, by the snap joint connection, purpose makes the installation and removal of being convenient to pipeline, in time processes problem.
Two, stay lane filled wall Scheme of Strengthening and parameter
3.5.1 filled wall external reinforcement
(1) wall reinforcement--anchor band net
On filled wall 1, move towards to arrange the Ф 14 type carriages 8 in the long four groups of holes of three row 2.6m along the tunnel, per two carriages 8 dock, adopt the strong pretension anchor pole 9 of IV level left-handed anchor pole special screw thread steel superelevation, 8# steel mesh reinforcement (adopting diamond mesh in body of wall out-of-flatness place) combined supporting, anchor pole 9 specifications are Ф 20-M22-1600mm.Every anchor pole adopts a joint Z2355 type middling speed resin explosive roll the extensible bolting; Anchor pole 9 spacings are 900mm, and array pitch is 800mm.Anchor band net supporting plan view is seen Fig. 6.
(2) wall table sealing-cement paste
On anchor pole steel band steel mesh reinforcement joint reinforcement basis, spray the thin-lift concrete sealing surfaces, prevent the country rock weathering.Jetting thickness 50mm; Concrete proportioning, cement: yellow sand: stone=1:2:2.
3.5.2 reinforce in the filled wall
Employing is placed the method for steel mesh reinforcement obturation self is reinforced in obturation.Lay steel mesh reinforcement 10 before the filling in the filling mould, bar diameter is 8mm, and the grid of steel mesh reinforcement 10 is of a size of 150 * 150mm, and steel mesh reinforcement 10 specifications are long (2250mm) * high (3000mm).
Filled wall 1 is interior places 5 steel mesh reinforcements 10 altogether, realizes the reinforcing to filled wall 1.(1) helps and three steel mesh reinforcements 10 of backplane perpendicular to track crossheading two, be that 16mm, length are that the screw-thread steel 11 of 2100mm couples together three steel mesh reinforcements 10 at the middle part of steel mesh reinforcement 10 and apart from each 300mm place of roof and floor with diameter, wherein steel mesh reinforcement 10 spacings are 1000mm, every each 200mm of net distance two face die plates.(2) be parallel to track crossheading two and help to arrange two steel mesh reinforcements 10, and with iron wire it is connected with before three steel mesh reinforcements 10.Fig. 7 has shown in the obturation arrangement perpendicular to three steel mesh reinforcements of track crossheading and base plate.
Owing to the issuable crack of reason such as stressed, need to take the measure of grouting and reinforcing, to prevent the leakage of goaf gas for obturation.
Three, gob-side entry retaining support scheme and parameter designing
Gob side entry retaining will successively be subject to the mining influence of upper curtate work plane and lower curtate work plane, adds that the tunnel period of service is long, so the total deflection in tunnel is larger, makes roadway support work more complicated and difficult.Because supporting is improper, often cause maintenance cost too high, so that gob side entry retaining is unreasonable economically, perhaps the tunnel is difficult to safeguard and causes the failure of gob side entry retaining.
(1) supporting scheme
The smooth enforcement that supporting and roadside support in the lane guarantee to stay the lane is set.
1, supporting in the lane
Supporting measure comprises in the lane of gob side entry retaining: foundation supporting, reinforced support in key position and the supporting of special location.
(1) foundation supporting
The basic supporting mode is the supporting of high-strength high-performance pretension anchor band net.Top board and section of side all adopt the bolt support of high-performance pretension, strengthen to greatest extent anchorage length and scope, protect top, wall supporting in conjunction with Ф 14 Bracket for steel bar, and top, side all adopt diamond mesh or novel steel-plastic net to be close to scar and protect top, wall supporting.
(2) reinforced support in key position
The control of gob side entry retaining top board is vital, does not have stablizing of top board just not have the stable of tunnel, does not have the complete success of just not staying the lane of top board.Therefore to strengthen roof timbering.Simultaneously, deep tunnel bears very large pressure at right angle, and two load-carrying properties of helping be need to strengthen.So, in the processing that top board and two is helped, to add strong supporting.Adopt anchor cable and truss that key position is strengthened reinforcing.
(3) special location supporting
Roof construction abnormal belt, fault zone, trickle become suddenly large band, immediate roof varied in thickness abnormal belt, bit freezing occurs inhales the special locations such as brills, at first encrypt roll bolt, and truss is moved towards in construction, pressure is locked capplce, the combined reinforced supporting of anchor rack.
2, roadside support
Roadside support adopts the lotion concrete wall to carry out supporting, has higher working resistance, and its Main Function has:
(1) utilizes the high-drag of filled wall 1 to remove to support the roof toad at caving zone edge, thereby share and alleviate the stand under load of lane inner support.
(2) during or top board periodic weighting harder when immediate roof, utilize filled wall 1 to cut off this place top board, thereby avoid top board to rupture along tunnel rib place, the dynamic loading that produces when utilizing simultaneously it to bear immediate roof inbreak or cycle inbreak.
(3) utilize and to go to limit the amount of crushing of tunnel and goaf intersection by the less filled wall 1 of contracting amount, and avoid the lane inner support to produce gross distortion.
(4) utilize filled wall 1 to go to isolation or airtight goaf, prevent from leaking out and spontaneous combustion of coal, avoid pernicious gas effusion in the goaf.
(2) supporting parameter design
(1) back adopts the long Ф 14 type carriages of strong pretension anchor pole cooperation 5.2m, steel-plastic net or the 10# iron wire wire lath combined supportings such as 7 left hand thread steel, the anchor pole specification is Ф 20-M22-2400mm, and every anchor pole adopts a joint K2355, joint Z2355 type resin explosive roll (being a 1.1m) the extensible bolting; Bolt interval 850 * 800mm, array pitch 1400 (1800) * 800mm between anchor cable.
(2) roadway's sides adopts the strong pretension anchor pole such as 5 left hand thread steel to add Ф 14 type carriages, steel-plastic net or 10# iron wire wire lath combined supporting, and the anchor pole specification is Ф 20-M22-2400mm.Every anchor pole adopts a joint Z2355 type middling speed resin explosive roll the extensible bolting; Bolt interval is 700 * 800mm.
(3) anchor cable is that " 321 " are arranged, wherein three anchor cables of a row are arranged with mind-set both sides in the tunnel, spacing 1400mm, anchor cable specification Ф 17.8 * 6300mm, another row's anchor cable is arranged along the tunnel Central Symmetry with two anchor cables, spacing 1800mm, the anchor cable specification is Ф 17.8 * 6300mm, two row's anchor cable array pitch are 800mm.Another root arranges that by work plane coal side 300mm place the anchor cable specification is Ф 17.8 * 8000mm.
(4) tunnel fillet place roll bolt suitably is with certain angle.Side, top anchor pole moment of torsion is not less than 150Nm, when the facility torque is not enough artificial lag behind to add turn round or adopt MQS-90J2 type pneumatic wrench to add and turn round.
(3) roof stimulating management during the mining influence
Mining influence comprises three phases, adopts leading infection, back production impact, filling and stays residual stress impact behind the lane, takes maintenance measure mainly for back during this working face extraction.
The outside 30m scope of working face wall adopts individual prop (three rows) supported laneway top board.Working face wall is the 200m scope inwards, sets up monomer H shaped steel shack 6 paired supportings (beam three posts).
Treat filling area top board width 2500mm, length 2400mm, when 2 reach of rear pattern plate support, across pitch uses 1/2 Ф 200mm * 4.5m plate-girder 7 to do cross-arm, and spacing 0.8m is to guarantee that top board is complete, anti-leak-stopping cash.
Claims (3)
1. gravity flow concrete convex-concave comprises step from connecting placement method:
(1) move supporting behind frame, the frame, cleaning,
During the advance of the face, at rear pattern plate support (2) and the front double-level-metal net of side falsework (3) (5); Rear pattern plate support (2) is every to 0.8m step pitch of reach, uses cross-arm to be erected at filling template top supporting roof, spacing 0.8m at the upper across pitch of rear pattern plate support (2); Work plane whenever moves three step pitches of frame, and filling once; Before the filling, the filling space foreign material are cleaned out, handed over the arrangement of space roof and floor smooth;
(2) formwork erection,
Adopt roadside packing side template, roadside packing rear pattern plate and side support template (3), adjust filling template after, the filling pipeline is set up, prepare to carry out filling; Paste Polypropylence Sheet three templates, the surplus of 500mm is reserved at two ends up and down, and the lower end fastens with slag stone, and the upper end is pricked on the wire lath at top; Form protruding and/or recessed surface on the roadside packing rear pattern plate;
(3) transportation of filler, accumulating and material-uploading style,
The gob side entry retaining filler adopts the mine car transportation, transports to filling pumping plant bedding plant, and logical charging equipment is transported to concrete pump again, is delivered to the filling position by the filling pipeline;
(4) filling,
When filling begins, pumping clear water at first, the back then is the coarse fodder filling immediately following the fines pumping, and the space of filling mould top 0.5m height is the fines filling, and after fines charged, adding clear water carried out pipeline-cleaning; Evenly pre-buried two arrange 6 L-type round steel in a upper filled wall (1) center, before next body of wall filling that its exposed parts is stretching, be used for connecting new and old two obturations;
(5) flushing filling pump and filling pipeline,
After filling operation is finished, carry out the cleaning of the filling pipeline of filling pump;
(6) filled wall solidifies;
To have after the filling to be no less than 4 hours setting time, guarantee that bearing capacity reaches more than the 2MPa, re-move again, adjust filling support and template.
2. gravity flow concrete convex-concave according to claim 1 is from connecting placement method, it is characterized in that: also comprise the external reinforcement to filled wall (1), (1) at the upper layout three row's carriage (8) that move towards along the tunnel of filled wall (1), per two carriages (8) dock, adopt anchor pole (9) and steel mesh reinforcement combined supporting, the anchor pole spacing is 900mm, and array pitch is 800mm; (2) spray thin-lift concrete sealing filled wall (1) surface, jetting thickness 50mm; The weight concrete proportioning is cement: yellow sand: stone=1:2:2.
3. gravity flow concrete convex-concave according to claim 1 is from connecting placement method, it is characterized in that: also comprise the interior reinforcing to filled wall (1), in the filling mould, lay steel mesh reinforcement (10) before the filling, place altogether 5 steel mesh reinforcements (10) in the filled wall (1), (1) helps and three steel mesh reinforcements of backplane (10) perpendicular to track crossheading two, be 16mm at the middle part of steel mesh reinforcement (10) and apart from each 300mm place of roof and floor with diameter, length is that the screw-thread steel (11) of 2100mm couples together three steel mesh reinforcements (10), wherein steel mesh reinforcement (10) spacing is 1000mm, every each 200mm of net distance two face die plates; (2) be parallel to track crossheading two and help to arrange two steel mesh reinforcements (10), and with iron wire it is connected with before three steel mesh reinforcements (10).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161480A (en) * | 2013-03-14 | 2013-06-19 | 中国矿业大学 | Method for actively supporting lane side filling gob-side entry retaining |
| CN103334785A (en) * | 2013-07-17 | 2013-10-02 | 安徽理工大学 | Gob-side entry retaining flexible infilled wall body structure and filling method thereof |
| CN106761754A (en) * | 2017-03-31 | 2017-05-31 | 中国矿业大学 | A kind of girdle comprehensive mining and gas control network one cooperative control system and method |
| CN117090573A (en) * | 2023-10-17 | 2023-11-21 | 臣功环境科技有限公司 | Z-type full-wind-pressure staggered strip continuous mining and continuous charging integrated process for mine |
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| CN117090573A (en) * | 2023-10-17 | 2023-11-21 | 臣功环境科技有限公司 | Z-type full-wind-pressure staggered strip continuous mining and continuous charging integrated process for mine |
| CN117090573B (en) * | 2023-10-17 | 2023-12-19 | 臣功环境科技有限公司 | Z-type full-wind-pressure staggered strip continuous mining and continuous charging integrated process for mine |
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