CN102777182A - Rapid end extracting method of large mining height working face - Google Patents
Rapid end extracting method of large mining height working face Download PDFInfo
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- CN102777182A CN102777182A CN2012102840692A CN201210284069A CN102777182A CN 102777182 A CN102777182 A CN 102777182A CN 2012102840692 A CN2012102840692 A CN 2012102840692A CN 201210284069 A CN201210284069 A CN 201210284069A CN 102777182 A CN102777182 A CN 102777182A
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Abstract
The invention relates to a coal extracting method, in particular to a rapid end extracting method of a large mining height working face. The rapid end extracting method effectively solves the problem that the existing end extracting method of the large mining height working face during mine extracting has a plurality of problems. The rapid end extracting method of the large mining height working face comprises the following steps of (1) reasonably designing and constructing a main withdraw channel with the section design that width*height is 3.0-4.0*3.5-4.0m; (2) improving support strength of the main withdraw channel and a close roadway around a stope, using anchor and net combined supporting for the main withdraw channel and the close roadway around the stope, adopting anchor cable and bar-mat reinforcement reinforced supporting according to lane retaining standards, and constructing the anchor cable reinforced supporting at the positions of the main withdraw channel and an apical plate of a penetrating lateral of the working face; and (3) helping to inject chemical pulp on the main withdraw channel and trigonum coal. A process procedure based on the rapid end extracting method of the large mining height working face enables end extracting of the working face to be smoothly carried out and creates good conditions for epilogue support removing work.
Description
Technical field
The present invention relates to the coal system of attack, be specially the system of attack of large-mining-height working surface.
Background technology
In coal digging industry; During adopt at the end of large-mining-height working surface, work plane and face regional mine pressure mutually and sharply increase, the ore deposit is pressed and is manifested obviously; Be prone to take place roof fall accident; The end is adopted workmanship and is difficult to guarantee, adopts to the quick end of work plane and has brought very big difficulty, can not remove frame work for postorder and create good conditions.
The shortcoming that the last mining method of original large-mining-height working surface exists is following:
1, in the existing last mining method; The work plane master remove passage adopt high * wide about 5.0 * 3.8m, the main passage section of removing is big, be unfavorable for the end adopt during the management of top board; Once after repeatedly the appearance master removed the passage perforation; It is serious to crush, and causes very big difficulty to removing frame, even can not accomplish the frame work of removing.
2, the master removes passage and stays the lane not carry out reinforce support, and original supporting intensity in tunnel is not enough, causes the tunnel seriously to sink.
3, main removing used the monomer column supporting in the passage, during perforation, top board occurs and seriously sinks, and in practical application, maximum sinking reaches 1.8m, and the above monomer column of 2/3rds quantity fractures, and removes frame to work plane and has caused great difficulty.Even use the brettis supporting of working resistance as 7400KN, to adopt at the end when connecting, the sinking more than 1 meter also appears in top board, and many brettis are crushed to death, and cause very big difficulty to removing frame.
4, during adopt at actual end, do not remove passage and the slip casting of work plane both sides to main, work plane receives the end to adopt mining influence; Whole coal seam becomes dredges, and wall caving strengthens, and the large tracts of land roof fall has appearred in work plane; Cause the end to be adopted about delay to 15 day, remove frame work and also reached about 40 days by delay.
5, online distance is adopted when confirming as 14 meters in the end, main remove passage and connect after, the most wire laths in force piece rear do not land, and do not cover support fully, cause and remove the frame difficulty; Online distance is adopted when confirming as 18m in the end, because the online distance is long, has influenced the end and has adopted progress, and the time lengthening is adopted at the end, and is unfavorable to roof control, also waste material.
When mining height was less than 4m during 6, adopted at the end, the phenomenon that force piece is crushed to death occurs, cause the unit space not enough.
7, adopt the networking time when long when the end, cat net, put relatively difficulty of net, unfavorable to quick propelling.
8, coal cutting velocity ratio is very fast, and support does not catch up with unit, causes the work plane unsupported back span from excessive, and roof fall accident takes place easily.
Therefore, be necessary that last mining method to existing large-mining-height working surface improves and optimizes, and adapts to modernization development.
Summary of the invention
The present invention provides a kind of large-mining-height working surface quick last mining method in order to solve the problem that there is above-mentioned defective in existing large-mining-height working surface end mining method.
The present invention adopts following technical scheme to realize:
The quick last mining method of a kind of large-mining-height working surface comprises the steps:
(1) appropriate design and the main passage of removing of construction: it is the design of section of 3.5～4.0 * 3.8～4.0m that the master removes the wide * height of passage employing.
(2) the raising master faces roadway support intensity around removing passage and stope mutually: the master faces the tunnel except that employing anchor net combined supporting around removing passage and stope mutually; By staying the lane standard to adopt anchor cable to add the steel mesh reinforcement reinforce support, at main passage and the work plane perforation side deck construction anchor cable reinforce support removed.
(3) remove to main that passage connects side and chemical pulp: a, the slip casting of work plane both sides coal group are annotated with work plane both sides coal group by coal group in both sides: the advance of the face apart from main remove passage perforation side 180～200m during; Group carries out grouting and reinforcing to work plane both sides coal; The vertical work plane of slip casting eye both sides coal group, the height 2.5～3.0m that attracts attention, dark 5.7～6. 2m of eye; Eye distance 5.5～6.5m, the slip casting eye elevation angle 15～30 degree; B, master remove passage and connect side and the slip casting for the first time of both sides coal group: work plane is removed during passage perforation side 150～180m apart from the master; Remove to main that passage connects side and coal group in both sides carries out slip casting; Construction is row's eye down, the height 1.4～1.8m that attracts attention, the dark 11.5～12.5m of eye; The slip casting eye elevation angle 15～30 degree, eye distance 5.5～6.5m; C, master remove passage and connect side and the slip casting for the second time of both sides coal group: work plane is removed during passage perforation side 100～150m apart from the master; Remove to main that passage connects side and coal group in both sides carries out slip casting once more; Row's eye is gone up in the construction of vertical coal group, and is three figured cloths with row's eye down and puts (promptly the row's of going up eye is staggered with row's eye down), slip casting eye distance top board 1.0～1.4m; Eye distance 5.5～6.5m, the dark 7.5～8.5m of eye.
(4) before adopt at the end, be single straight line ZZ/12000/26.5/44 type brettis in the Heng Chuan intersection and along the main passage perforation side of removing, the main passage of removing is arranged ZZ/12000/26.5/44 type brettis with the auxilliary horizontal Kawaguchi of contact that removes passage.
(5) adopt at the end: when work plane is removed passage perforation side 15～16m apart from the master, on force piece, connect wire lath; The work plane mining height was controlled between 4.5～5.0m during adopted at the end; After beginning was adopted at the end, last first time net adopted end to the end, and networking and the not parallel operation of coal cutting operation are carried out " networking-cat net-coal cutting-suspension-try to stop people from fighting each other-push up slide " operation, circulate successively and carry out, and adopt end up to the end.
Based on the activities of the quick last mining method of above-mentioned large-mining-height working surface, make the end of work plane adopt and to carry out smoothly, and remove frame work for postorder and created good condition.
Advantage of the present invention is following:
1, appropriate design and construction master remove passage, adopt high * wide be the design of section of 3.5～4.0 * 3.8～4.0m, the mine pressure that this moment is main removes passage a little less than, the ore deposit is pressed and is manifested not obvious, Engineering Quality Control and postorder are adopted in the end, and to remove frame work the most favourable.
2, the master faces the tunnel except that adopting anchor net combined supporting around removing passage and stope mutually; By staying the lane standard to adopt anchor cable to add the steel mesh reinforcement reinforce support; Connect side deck construction anchor cable reinforce support at the main passage of removing with work plane, improved the main supporting intensity that passage and stope face the tunnel on every side mutually of removing greatly.
3, before adopt at the end, main removing ZZ/12000/26.5/44 type brettis is installed in the passage, main removing with the horizontal Kawaguchi of auxilliary contact of removing arranged ZZ/12000/26.5/44 type brettis.Like this, when connecting, top board serious sinking can not occur, and brettis can not be crushed to death yet, and helps removing carrying out smoothly of frame work.
4, in advance the main passage of removing is connected side and work plane both sides coal group notes chemical pulp, improve the coal body structure, improve coal body self intensity.
5, the work plane mining height was controlled between 4.5-5.0m during adopted at the end; The end is adopted the online distance and is confirmed as 15-16m, and the online distance is suitable, can not influence the end and adopt process; And after the master removes the passage perforation; The wire lath at force piece rear can land, and covers support fully, helps follow-up the carrying out smoothly of frame work of removing.
6, the end time of adopting shortens greatly; With Jincheng, Shanxi Province Coal Industry Group Co., Ltd Si He colliery 1303 work planes is example, and the end of day in February 28 of surfing the Net since on February 26th, 2011 is adopted at the end, when adopt at the end only 3 days; Create large-mining-height working surface end, Si He ore deposit and adopted the shortest record of time; And 1303 work plane ends are adopted and have been realized safety, efficient, quick, any accident do not occur, remove frame work for postorder and have created very advantageous conditions.
The present invention is reasonable in design, efficiently solves in the pit mining, and there is the problem of many defectives in existing large-mining-height working surface end mining method.
Description of drawings
Fig. 1 is the plan view of application site of the quick last mining method of large-mining-height working surface of the present invention.
Among the figure, 1-brettis, 2-force piece
The specific embodiment
Be elaborated below in conjunction with the specific embodiment (the last mining method with Jincheng, Shanxi Province Coal Industry Group Co., Ltd Si He colliery is an example) of accompanying drawing to the quick last mining method of large-mining-height working surface of the present invention.
The quick last mining method of a kind of large-mining-height working surface comprises the steps:
(1) appropriate design and the main passage of removing of construction: it is the design of section of 3.5 * 3.8m that the master removes the wide * height of passage employing.
(2) the raising master faces roadway support intensity around removing passage and stope mutually: the master faces the tunnel except that employing anchor net combined supporting around removing passage and stope mutually; By staying the lane standard to adopt anchor cable to add the steel mesh reinforcement reinforce support, at main passage and work plane perforation side deck construction ￠ 22-8300 anchor cable reinforce supports removed.
(3) remove to main that passage connects side and chemical pulp: a, the slip casting of working face both sides coal group are annotated with working face both sides coal group by coal group in both sides: the advance of the face apart from main remove passage perforation side 200m during; Group carries out grouting and reinforcing to working face both sides coal; The vertical working face of slip casting eye both sides coal group; Height 2.5m attracts attention; The dark 6m of eye; Eye distance 6.5m, the slip casting eye elevation angle 18 degree; B, the main passage of removing connect side and the slip casting for the first time of both sides coal group: working face apart from main remove passage and connect side 150m during, remove to main that passage connects side and coal group in both sides carries out slip casting, construction is row's eye down; Height 1.6m attracts attention; The dark 12m of eye, the slip casting eye elevation angle 15 degree, eye distance 6m; C, master remove passage and connect side and the slip casting for the second time of both sides coal group: working face is removed during the passage perforation side 100m apart from the master; Remove to main that passage connects side and coal group in both sides carries out slip casting once more; Vertical coal helps construction to go up row's eye; And being three figured cloths with following row's eye puts; Slip casting eye distance top board 1.2m; Eye distance 6m, the dark 8m of eye.
(4) before adopt at the end, be single straight line ZZ/12000/26.5/44 type brettis 1 in the Heng Chuan intersection and along the main passage perforation side of removing, the main passage of removing is arranged ZZ/12000/26.5/44 type brettis 1 with the auxilliary horizontal Kawaguchi of contact that removes passage.
(5) adopt at the end: when work plane is removed passage perforation side 15m apart from the master, on force piece 2, connect wire lath; The work plane mining height was controlled between the 5.0m during adopted at the end; After beginning was adopted at the end, last first time net adopted end to the end, and networking and the not parallel operation of coal cutting operation are carried out " networking-cat net-coal cutting-suspension-try to stop people from fighting each other-push up slide " operation, circulate successively and carry out, and adopt end up to the end.
The quick last mining method of a kind of large-mining-height working surface comprises the steps:
(1) appropriate design and the main passage of removing of construction: it is the design of section of 3.8 * 4.0m that the master removes the wide * height of passage employing.
(2) the raising master faces roadway support intensity around removing passage and stope mutually: the master faces the tunnel except that employing anchor net combined supporting around removing passage and stope mutually; By staying the lane standard to adopt anchor cable to add the steel mesh reinforcement reinforce support, at main passage and work plane perforation side deck construction ￠ 22-8300 anchor cable reinforce supports removed.
(3) remove to main that passage connects side and chemical pulp: a, the slip casting of working face both sides coal group are annotated with working face both sides coal group by coal group in both sides: the advance of the face apart from main remove passage perforation side 180m during; Group carries out grouting and reinforcing to working face both sides coal; The vertical working face of slip casting eye both sides coal group; Height 2.7m attracts attention; The dark 5.7m of eye; Eye distance 6m, the slip casting eye elevation angle 30 degree; B, the main passage of removing connect side and the slip casting for the first time of both sides coal group: working face apart from main remove passage and connect side 180m during, remove to main that passage connects side and coal group in both sides carries out slip casting, construction is row's eye down; Height 1.4m attracts attention; The dark 11.5m of eye, the slip casting eye elevation angle 25 degree, eye distance 6.5m; C, master remove passage and connect side and the slip casting for the second time of both sides coal group: working face is removed during the passage perforation side 120m apart from the master; Remove to main that passage connects side and coal group in both sides carries out slip casting once more; Vertical coal helps construction to go up row's eye; And being three figured cloths with following row's eye puts; Slip casting eye distance top board 1.0m; Eye distance 6.5m, the dark 8.5m of eye.
(4) before adopt at the end, be single straight line ZZ/12000/26.5/44 type brettis 1 in the Heng Chuan intersection and along the main passage perforation side of removing, the main passage of removing is arranged ZZ/12000/26.5/44 type brettis 1 with the auxilliary horizontal Kawaguchi of contact that removes passage.
(5) adopt at the end: when work plane is removed passage perforation side 16m apart from the master, on force piece 2, connect wire lath; The work plane mining height was controlled between the 4.7m during adopted at the end; After beginning was adopted at the end, last first time net adopted end to the end, and networking and the not parallel operation of coal cutting operation are carried out " networking-cat net-coal cutting-suspension-try to stop people from fighting each other-push up slide " operation, circulate successively, carry out adopting end up to the end.
Embodiment 3
The quick last mining method of a kind of large-mining-height working surface comprises the steps:
(1) appropriate design and the main passage of removing of construction: it is the design of section of 4.0 * 3.8m that the master removes the wide * height of passage employing.
(2) the raising master faces roadway support intensity around removing passage and stope mutually: the master faces the tunnel except that employing anchor net combined supporting around removing passage and stope mutually; By staying the lane standard to adopt anchor cable to add the steel mesh reinforcement reinforce support, at main passage and work plane perforation side deck construction ￠ 22-8300 anchor cable reinforce supports removed.
(3) remove to main that passage connects side and chemical pulp: a, the slip casting of work plane both sides coal group are annotated with work plane both sides coal group by coal group in both sides: the advance of the face apart from main remove passage perforation side 190m during; Group carries out grouting and reinforcing to work plane both sides coal; The vertical work plane of slip casting eye both sides coal group, the height 3.0m that attracts attention, dark 6. 2m of eye; Eye distance 5.5m, the slip casting eye elevation angle 15 degree; B, the main passage of removing connect side and the slip casting for the first time of both sides coal group: work plane apart from main remove passage and connect side 160m during, remove to main that passage connects side and coal group in both sides carries out slip casting, construction is row's eye down; Height 1.8m attracts attention; The dark 12.5m of eye, the slip casting eye elevation angle 30 degree, eye distance 5.5m; C, master remove passage and connect side and the slip casting for the second time of both sides coal group: work plane is removed during the passage perforation side 150m apart from the master; Remove to main that passage connects side and coal group in both sides carries out slip casting once more; Row's eye is gone up in the construction of vertical coal group, and is three figured cloths with row's eye down and puts slip casting eye distance top board 1.4m; Eye distance 5.5m, the dark 7.5m of eye.
(4) before adopt at the end, be single straight line ZZ/12000/26.5/44 type brettis 1 in the Heng Chuan intersection and along the main passage perforation side of removing, the main passage of removing is arranged ZZ/12000/26.5/44 type brettis 1 with the auxilliary horizontal Kawaguchi of contact that removes passage.
(5) adopt at the end: when work plane is removed passage perforation side 15.5m apart from the master, on force piece 2, connect wire lath; The work plane mining height was controlled between the 4.5m during adopted at the end; After beginning was adopted at the end, last first time net adopted end to the end, and networking and the not parallel operation of coal cutting operation are carried out " networking-cat net-coal cutting-suspension-try to stop people from fighting each other-push up slide " operation, circulate successively and carry out, and adopt end up to the end.
During practical implementation, as shown in Figure 1, face width is 200-300m, and the edge master removes passage perforation side and Heng Chuan intersection (tunnel is the Heng Chuan intersection with main intersection of removing passage) is 65 ZZ/12000/26.5/44 types of single straight line brettis; Main remove passage and the auxilliary horizontal Kawaguchi of contact that removes passage (the main passage of removing is the horizontal Kawaguchi of contact with auxilliary intersection when removing passage UNICOM) 2 ZZ/12000/26.5/44 type brettis are arranged side by side respectively.Said brettis refers to have the box style substructure of being with the column resetting means, makes the whole standing support that moves.The main passage of removing is through the anchor cable reinforce support with after brettis is installed, and the master removes the passage supporting intensity and improves greatly.The yield load of said ZZ/12000/26.5/44 type brettis is 12000KN, has improved 4600KN than the initial yield load that uses as the brettis of 7400KN, has effectively improved the main supporting intensity of removing passage.
During practical implementation, when helping slip casting for work plane both sides coal, 4 eyes are respectively annotated by coal group in both sides, 1 ton of average materials of each eye; Main remove that passage connects side and 42 eyes are annotated in the slip casting for the first time of both sides coal group, 1.62 tons of every average materials; Main remove that passage connects side and 40 eyes are annotated in the slip casting for the second time of both sides coal group, 1.05 tons of every average materials.
Said anchor net combined supporting: the master removes the frame passage when tunnelling; It is that 22mm, length are the twisted steel anchor rod of 2.4m that 5 diameters of every meter construction are taked in the back supporting; Add every meter 1 reinforcing bar joist; Adding 1 specification again is 5 * 1.1m diamond mesh, and adding two diameters of per two meters constructions again is that 22mm, length are the cable bolting of 7.3m.It is that 20mm, length are the twisted steel anchor rod of 2.0m that 8 (every group each 4) diameters of every meter construction are helped to take in tunnel two, and two to help respectively to add a slice specification be that 3.5 * 1.1m diamond mesh carries out supporting.The roadway supported by bolt in Si He colliery all adopts anchor pole+anchor cable+wire lath+reinforcing bar joist to carry out supporting at present, and difference is that drift section is different, and anchor pole quantity is different.This support pattern of roadway supported by bolt generally is anchor net combined supporting.
The said lane standard of staying: at present " five lanes layouts " adopted in the large-mining-height working surface tunnel more, wherein has two tunnels will be after this working face extraction end, remains as the tunnel of next work plane to reuse.Guaranteeing that the tunnel is stayed after the work plane digging finishes sets, must be in the working face extraction process, and reinforce support is carried out in the tunnel that needs are kept on original supporting basis, guarantee that the Liu Xiang tunnel can bear back production dynamic pressure influence, remains.For the standard roadway support, Si He has formulated in the colliery unified tunnel and has stayed and establish the supporting standard, is convenient to construction and management.Si He colliery roadway support accepted standard is at present: top board: every meter 4 diameters of on original supporting basis, constructing again are that 22mm, length are 4.4 meters anchor cable, add the steel mesh reinforcement that diameter is 6.2mm again, and this steel mesh reinforcement is bigger than original diamond mesh intensity; Two help: it is that 22mm, length are the anchor cable of 4.4m that non-working surface connects 4 diameters of every meter construction of side, and adds steel mesh reinforcement; Work plane connects side for ease of connecting, and reduces the cut amount of metal, no longer construct anchor cable and steel mesh reinforcement.Above-mentioned practical implementation to the roadway support accepted standard is exactly that described anchor cable adds the steel mesh reinforcement reinforce support.
Said chemical pulp also is the macromolecule reinforcement material, and at present the Si He colliery is used for material that coal body reinforces and mainly contains two kinds of cement paste and chemical pulps.Chemical pulp mainly contains " auspicious rice is reinforced No. 1 " and " Mary looses " of Shandong Hao Ke company production that Beijing Rui Mi company produces; The both has two kinds of components; When mixing, chemical reaction taking place, solidifies coal body; Increase coal body tension, resistance to compression effect, high-temperature chemical reaction takes place in mixed process.
During practical implementation; When work plane connects side 15-16m when beginning to surf the Net apart from the main passage of removing; Hang to join wire lath along work plane at force piece 2 front-axle beams, until connecting with the main passage of removing, wire lath covers the work plane total length and at each 3-5m that has more than needed out of frame head and tail frame (headstock and the aircraft tail shelf that refer to transporter on the work plane); Ride over all working face support top, and with 16
#Bifilar metal twine connects with the back net.
The concrete steps that network process is adopted at the end are: (step described herein is the conventional steps that adopt at the end, and the understanding for ease of the said method of the application here is described in detail)
(1) hang the preceding preparation of net:
1. must check work plane all working face support before hanging net, force piece no leakage when guaranteeing to connect, not scurry liquid, do not unload automatically.
2. before hanging net, the moving anchor rig of 6 typhoons is installed at work plane, and with wire lath, net hook, 16
#Materials such as twine, Ф 18-M20-1000mm anchor pole, anchoring agent, drilling rod, drill bit, agitator transportation in time as required put in place, and pile up in order neatly, must not influence construction.
3. the force piece face guard is got; Utilizing cat ladder, stool, plank to put up frame (also can be retracted to behind the horizontal level little wall supporting with the support locking; Between little wall supporting, spread plank as working platform), utilize 6 jumbolter packet segmentations to carry out perforating simultaneously.
4. each support is made a call to an eye, beat eye between support before beam-ends, use the drilling rod of Ф 19-1500mm, Ф 30mm drill bit, model is a Ф 18-M20-1000 rod bolt, eye is dark to be 950mm; Every anchor pole uses a Z2360 anchoring agent.
Construction top anchor pole technological process: put up working platform → decide position, hole → with jumbolter pinch plate bolthole and clear hole → put in boring resin explosive roll → with rock bolt head withstand powder stick and send into the hole at the bottom of → connect anchor pole afterbody → rotation rig stirring powder stick to stipulated time (be generally 20-35 second) → stop stirring taking off next anchor pole of rig → installation with agitator.
(2) hang first time net:
Begin to hang net apart from main removing first time when passage connects side 15-16m, adopt method that anchor pole connects the anchor net with first net anchor on top board.The long edge work plane of volume net is laid, and minor face moves towards to lay along work plane, adopts the method for anchor pole flanging (200mm) that first time net is fixed on the top board.5-10 people lift to enough height with net when fixing first time net, and the long limit that 3-5 human iron pallets will be netted is fixed on the anchor pole and tightening nuts; First time the net minor face overlaps 500 mm, and with 16
#Twine is bifilar with the interface kink, every meter even 10 roads, and the per pass kink is no less than 3 circles, and the minor face interface must join double.
(3) online standard:
Second, third, the 4th time net be single net, second time with first time; The 3rd time and second time; The 4th time is 200mm with the 3rd time long edge lap, and minor face overlaps 500 mm.Begin to hang two nets for the 5th time, hang over for the 5th time in the 4th time net (promptly long edge lap is 600mm), minor face overlaps 500 mm; The 6th time net hangs in the 5th time net (promptly long edge lap 600 mm), and minor face overlaps 500 mm, and the like.All networkings are with 16
#Bifilar twine kink, every meter even 10 roads, the per pass kink is no less than three circles; The individual layer net must be gone up off line long limit communications and liaison, the long limit of the necessary three-layer network of Double-level Reticulated communications and liaison; Minor face must join double.Estimate online 26 times, wherein single net 4 times, two nets 22 times.
(4) cat net, suspension:
Networking is once unsuitable long, during the cat net of each networking back, must guarantee that wire lath can be sling by the support face guard fully, is advisable apart from spillplate 500mm after slinging, be networked to specific length after, with 8
#Galvanized wire is tied up net on the support face guard, regains face guard, again with sagging net with 8
#Galvanized wire is dragged on extension and the column.Coal-winning machine begins coal cutting, behind the back roll 10-20m of transporter, with regaining 8 on the face guard
#Iron wire is cut off, and face guard is got successively again, and net is provoked, and begins to try to stop people from fighting each other, push up slide.
Work plane top slide standard: before 1, the top slips, at first guarantee smoothly, float coal, scum silica frost are cleaned out.2, after transporter moved on to assigned position, it is flat, straight, steady that laying will reach.
The top slips operating process: confirm that top board is intact, the ore deposit positive pressure normal-moving top pick-observations transporter move-shift the precalculated position onto after valve-off the piston rod of pick is withdrawn.
The top slips risk to be controlled in advance: when 1, the top slips, will push up the end that slips earlier and withstand on the firm pillar, and forbid to use regular pillar to do origin of force, and note observing moving and the processing in time that notes abnormalities of support situation on every side of transporter.2, when mobile working face transporter head, tail; Remove barrier post, after head (tail) moves on to the precalculated position, timely polishing head (tail) support; When moving chute to pillar will with pluck, with push away, with benefit; Prevent to control the top overlong time, must in time accomplish fluently head (tail) compression leg after head (tail) moves, otherwise inaccurate test-run a machine.When 3, the top slips, it is progressively moved forward, forbid to slip from the centre to two crowns, the transporter bending section must not be less than 15m, and the distance of shifting of conveyer place and coal mining unit must not be less than 15m, and the rib side at shifting of conveyer place is forbidden the people that stands.
(5) join wire rope:
Join first time wire rope at the 8th time online portion selvage.Specific practice: before the work plane couplet is established and netted for the 8th time, stretching the hanging at the 8th time net and the 7th time net of wire rope overlapped 600 mm places, go up net then the 8th time, again with the 6th time off the net selvage couplet of the 8th time online portion selvage together with wire rope along work plane.Require: with 16
#Bifilar twine kink, every meter even 10 roads, the per pass kink is no less than three circles, and every time wire rope spacing 600 mm are total to last 19 times wire rope, and wire rope is each 1-2m that has more than needed out of frame in the frame head and tail termination.If can overlap when wire rope falls short of, wire rope overlap joint section is no less than 2m, and with being no less than 3 wire clips connections, staggers as far as possible and be no less than 20m in the front and back overlap joint section of wire rope twice.
Claims (4)
1. the quick last mining method of large-mining-height working surface is characterized in that: comprise the steps:
(1) appropriate design and the main passage of removing of construction: it is the design of section of 3.5～4.0 * 3.8～4.0m that the master removes the wide * height of passage employing;
(2) the raising master faces roadway support intensity around removing passage and stope mutually: the master faces the tunnel except that employing anchor net combined supporting around removing passage and stope mutually; By staying the lane standard to adopt anchor cable to add the steel mesh reinforcement reinforce support, at main passage and the work plane perforation side deck construction anchor cable reinforce support removed;
(3) remove to main that passage connects side and chemical pulp: a, the slip casting of working face both sides coal group are annotated with working face both sides coal group by coal group in both sides: the advance of the face apart from main remove passage perforation side 180～200m during; Group carries out grouting and reinforcing to working face both sides coal; The vertical working face of slip casting eye both sides coal group; Height 2.5～3.0m attracts attention; Dark 5.7～6. 2m of eye; Eye distance 5.5～6.5m, the slip casting eye elevation angle 15～30 degree; B, master remove passage and connect side and the slip casting for the first time of both sides coal group: working face is removed during passage perforation side 150～180m apart from the master; Remove to main that passage connects side and coal group in both sides carries out slip casting; Construction is row's eye down; Height 1.4～1.8m attracts attention; Dark 11.5～the 12.5m of eye; The slip casting eye elevation angle 15～30 degree, eye distance 5.5～6.5m; C, master remove passage and connect side and the slip casting for the second time of both sides coal group: working face is removed during passage perforation side 100～150m apart from the master; Remove to main that passage connects side and coal group in both sides carries out slip casting once more; Vertical coal helps construction to go up row's eye; And being three figured cloths with following row's eye puts; Slip casting eye distance top board 1.0～1.4m; Eye distance 5.5～6.5m, the dark 7.5～8.5m of eye;
(4) before adopt at the end, be single straight line ZZ/12000/26.5/44 type brettis (1) in the Heng Chuan intersection and along the main passage perforation side of removing, the main passage of removing is arranged ZZ/12000/26.5/44 type brettis (1) with the auxilliary horizontal Kawaguchi of contact that removes passage;
(5) adopt at the end: when work plane is removed passage perforation side 15～16m apart from the master, on force piece (2), connect wire lath; The work plane mining height was controlled between 4.5～5.0m during adopted at the end; After beginning was adopted at the end, last first time net adopted end to the end, and networking and the not parallel operation of coal cutting operation are carried out " networking-cat net-coal cutting-suspension-try to stop people from fighting each other-push up slide " operation, circulate successively and carry out, and adopt end up to the end.
2. the quick last mining method of large-mining-height working surface according to claim 1 is characterized in that: main design of section of removing the passage employing height * wide 3.5 * 3.8m of being.
3. the quick last mining method of large-mining-height working surface according to claim 1 and 2 is characterized in that: in the Heng Chuan intersection and the main passage of removing connect side and arrange 65 ZZ/12000/26.5/44 type brettis; Main passage and the auxilliary horizontal Kawaguchi of contact that removes passage 2 the ZZ/12000/26.5/44 type brettis that are arranged side by side respectively of removing.
4. the quick last mining method of large-mining-height working surface according to claim 3 is characterized in that: 4 eyes are respectively annotated by coal group in said work plane both sides, 1 ton of the average materials of each eye; Main remove that passage connects side and 42 eyes are annotated in the slip casting for the first time of both sides coal group, 1.62 tons of every average materials; Main remove that passage connects side and 40 eyes are annotated in the slip casting for the second time of both sides coal group, 1.05 tons of every average materials.
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| CN104453966A (en) * | 2014-10-24 | 2015-03-25 | 山西晋城无烟煤矿业集团有限责任公司 | large mining height end-mining fully-mechanized excavating machine manufacturing removing frame channel collapse column passing leg-less supporting erecting construction method |
| WO2020238210A1 (en) * | 2019-05-24 | 2020-12-03 | 翟文 | Comprehensive supporting method for fully mechanized mining face of coal mine |
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| CN112196529A (en) * | 2020-09-30 | 2021-01-08 | 兖州煤业股份有限公司 | Large-height-difference advanced mining stop process |
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