CN110030013A - A kind of seam period of transition bracket area three cuts the gob-side entry retaining method of top self-contained lane side - Google Patents
A kind of seam period of transition bracket area three cuts the gob-side entry retaining method of top self-contained lane side Download PDFInfo
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- CN110030013A CN110030013A CN201910274009.4A CN201910274009A CN110030013A CN 110030013 A CN110030013 A CN 110030013A CN 201910274009 A CN201910274009 A CN 201910274009A CN 110030013 A CN110030013 A CN 110030013A
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- 238000005065 mining Methods 0.000 claims abstract description 6
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- 238000004062 sedimentation Methods 0.000 claims description 3
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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Abstract
The present invention provides the gob-side entry retaining methods that top self-contained lane side is cut in a kind of transition bracket area three the seam period, are related to mining engineering technical field, and step includes: the tunnel that A. uses anchor pole and Anchor reinforced support gob side entry retaining, and hydraulic prop is arranged by lane；B. break line is moved towards on the inside of the tunnel ahead work face location arrangements of gob side entry retaining；C. anchor pole and anchor cable are added simultaneously with working face extraction, and arranges that break line is moved towards in outside；D. the maximum for calculating combination rock beam hangs apex distance, and top step pitch is cut in determination, cuts top step pitch and is less than maximum outstanding apex distance, working face is often advanced beyond the distance arrangement tendency break line for cutting top step pitch；E. combination rock beam falls to forming lane side, blocks the gap between lane side and back；F. step B to E is repeated with the advance of the face, roadway surrounding rock withdraws from hydraulic prop after stablizing, complete gob side entry retaining.This method solve the technical problems of girdle gob side entry retaining gear cash difficulty, also have many advantages, such as that lane side is complete, rock deformation is small.
Description
Technical field
Top is cut the present invention relates to mining engineering technical field, especially a kind of three line of transition bracket supporting region to reinforce directly
Push up the gob-side entry retaining method of period let-down self-contained lane side.
Background technique
With adopting deep increase, the recovery method of long wall with coal pillar exploitation brings a series of problems, such as tunnelling amount is big, adopts
Anxiety is taken in pick, and reserved coal pillar, which causes coal resources waste and stress of coal pillar to be concentrated, leads to dynamic disaster.Pass through edge
The lane Kong Liu production technique can effectively solve the above problems, but now traditional gob side entry retaining passes through roadside packing or branch of building a wall
Top plate is protected, system complex, technique is cumbersome, and road-in packing or wall are difficult to adapt to deformation of the surrounding rock in tunnel and are easily damaged.
The existing lane Qie Dingcheng technique is in implementation process, due to being cut by the methods of explosion or hydraulic fracturing by lane
Top cuts behind top using the anchor shaft anchor cable and hydraulic prop supporting roof inside tunnel, removes road-in packing or builds a wall
Method, there are also the methods for keeping off cash formation tunnel.These method top plate layerings for cutting top are caving broken cash and are easy to pour in tunnel, lead to lane
Condition is poor in road, and in addition above method gear cash is difficult, needs additional carry out anchor rod anchored and spoil slip casting sealing, workload
Greatly, leak out at being also easy to happen behind lane, under the influence of a working face safety in production, it is therefore desirable to existing edge air gallery technology
It is improved further.
Summary of the invention
To solve to keep off cash difficulty during current gob side entry retaining, complicated technical problem of constructing, the present invention provides one kind
The gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in transition bracket area three, and specific technical solution is as follows.
A kind of seam period of transition bracket area three cuts the gob-side entry retaining method of top self-contained lane side, and step includes:
A. the tunnel of gob side entry retaining uses anchor pole and Anchor reinforced support, and hydraulic prop is arranged by lane；
B. in the tunnel of gob side entry retaining, break line is moved towards in the advance position arrangement inside of working face；
C. break line is moved towards on the outside of the transition bracket area arrangement at working face rear, break line and outside trend are moved towards in inside
It is formed between break line and cuts top region, add anchor pole and anchor cable with working face extraction while cutting top region；
D. the maximum for calculating combination rock beam hangs apex distance, determines and cuts top step pitch, and the top step pitch of cutting is less than maximum outstanding apex distance, work
Make face and is often advanced beyond the distance arrangement tendency break line for cutting top step pitch；
E. combination rock beam falls to forming lane side, blocks the gap between lane side and back；
F. step B to E is repeated with the advance of the face, roadway surrounding rock withdraws from hydraulic prop after stablizing, completion is stayed along sky
Lane.
Preferably, inside is moved towards break line and is arranged in the tunnel of gob side entry retaining, and break line is moved towards out of tunnel in inside
Through directly pushing up, base object model is reached；The depth that break line is moved towards in inside is greater than immediate roof thickness MZ, the immediate roof thickness are as follows:
Wherein haFor mining height, saFor the practical sedimentation value of rock beam, k is that rock beam lower part is caving the broken swollen coefficient in rock stratum.
Preferably, the height h that break line is greater than tunnel from face roof through the thickness of overlying rock is moved towards in outside,
Through overlying rock from bottom to top every layer with a thickness of c1、c2、c3···cn, the top depth of cutting that break line is moved towards in outside is H,
According to formula: H > c1+c2+c3+···+cn> h determines that outside moved towards break line cuts top depth.
It may further be preferable that tendency break line cut that top depth is equal to that outside moves towards break line cut top depth, tendency
Break line cut top drilling to goaf side inclination and tilt angle less than 5 °.
It may further be preferable that break line is moved towards in outside is arranged in working face rear, inside is moved towards break line and is sidled outside
It is arranged in parallel to break line, break line is moved towards in inside and the distance between break line is moved towards as 2.5~5m in outside.
Preferably, the tunnel of gob side entry retaining is in first tendency break line of working face open-off cut eye location arrangements, with working face
2~3m of propulsion interval arrangement Article 2 be inclined to break line.
Preferably, anchor cable protrudes into hard direct top through weak directly top, adjusts supporting according to roof strata integrality
Density.
It is also preferred that the gap between lane side and back is filled envelope by jet expansion foam or whitewashing
It is stifled.
The beneficial effect comprise that
(1) the present invention provides the gob-side entry retaining method that top self-contained lane side is cut in a kind of transition bracket area three the seam period, pass through
It arranges that break line is moved towards in parallel inside and outside moves towards break line formation and cuts top region, cuts top cutting arrangement tendency in the region of top
Line, direct top part is cut drop down onto gob side entry retaining tunnel side formed lane side, due to cut top region be arranged in advance anchor pole and
Anchor cable, thus at lane to cut top part complete, enter tunnel so as to avoid a large amount of spoils, save the processes such as gear cash.
(2) this method also has reduction driving face, so that alleviating digging connects nervous problem, and can not stay
Coal column reduces the waste of coal resources, prevents stress of coal pillar from concentrating, to avoid coal and gas prominent dangerous；Not due to this method
It needs to carry out roadside packing and builds a wall to keep off cash, it is only necessary to carry out cutting top in transition bracket region, to increase the construction for staying lane
Space stays influence of the lane construction to working face extraction smaller.
(3) gob-side entry retaining method provided by the invention is cut by three break lines and falls direct top, forms lane side, cuts after cutting top
Break the stress transfer of top plate, has effectively avoided goaf Xuan Ding, improve the ambient stress of gob side entry retaining, reduce along sky
The confining pressure for staying lane country rock is effectively controlled the rock deformation in gob side entry retaining tunnel；In addition the present invention also has simple process,
High efficient construction.
Detailed description of the invention
Fig. 1 is the method flow schematic diagram of gob side entry retaining；
Fig. 2 is gob side entry retaining working face and roadway layout schematic diagram；
Fig. 3 is the Section A-A schematic diagram of Fig. 2；
Fig. 4 is the section B-B schematic diagram of Fig. 2；
Fig. 5 is break line position schematic diagram；
Fig. 6 is improved break line deployment scenarios schematic diagram.
In figure: moving towards break line on the inside of 1-；Break line is moved towards on the outside of 2-；3- is inclined to break line；4- cuts eye；5- anchor pole；6-
Anchor cable；7- is directly pushed up；8- base object model；The goaf 9-；10- transition bracket.
Specific embodiment
In conjunction with shown in Fig. 1 to Fig. 6, a kind of transition bracket area three provided by the invention stitch the period cut top self-contained lane side along sky
Lane method is stayed, specific embodiment is as follows.
Embodiment 1
It a kind of transition bracket area three stitches the period and cuts the specific construction procedure of gob-side entry retaining method of top self-contained lane side and include:
The tunnel of step A. gob side entry retaining uses 6 strengthening supporting of anchor pole 5 and anchor cable, and hydraulic prop is arranged by lane, into
Row gib, hydraulic prop are convenient in top board construction using special bracket.
Step B. is in the tunnel of gob side entry retaining, the advance position of working face, working face transition stent area, arrangement inside
Break line 1 is moved towards, construction can arrange break line in tunnel with first advance, and top drilling is cut in mainly setting.
It moves towards break line 1 on the inside of wherein to be arranged in the tunnel of gob side entry retaining, inside is moved towards break line 1 and run through out of tunnel
Directly top 7 reaches base object model 8, and break line 1 is moved towards in inside can also tilt certain angle to working face side, and inclination angle is answered small
In 5 °.In addition, the depth that break line 1 is moved towards in inside is greater than immediate roof thickness MZ, described directly to push up 7 thickness are as follows:
Wherein haFor mining height, saFor the practical sedimentation value of rock beam, k is that rock beam lower part is caving the broken swollen coefficient in rock stratum, immediate roof thickness
According to drilling data and specific construction drill data and actual exploitation situation, determined by calculating.
Step C. moves towards break line 2 on the outside of working face rear is arranged, break line 2 is moved towards in the area transition bracket Kong Ding in outside
Arrangement, break line 1 is moved towards in inside and outside is moved towards to be formed between break line 2 and cuts top region.It cuts top region and passes through anchor pole 5 and anchor cable
6 is fixed, and fixed rock stratum forms combination rock beam, anchor pole 5 and anchor cable 6 is added with working face extraction while cutting top region, in work
Make to start construct anchor pole 5 and anchor cable 6 under the transition bracket of face, break line 2 is moved towards in construction outside after the advance of the face.
The height h that break line 2 is greater than tunnel from face roof through the thickness of overlying rock is moved towards in outside, through above covering
Rock stratum from bottom to top every layer with a thickness of c1、c2、c3···cn, the top depth of cutting that break line is moved towards in outside is H, according to formula:
H>c1+c2+c3+···+cn> h determines that outside moved towards break line 2 cuts top depth, cuts top drilling according to top depth construction is cut.
Outside moves towards break line 2 and is arranged in working face rear, and break line 1 is moved towards in inside, and with outside to move towards break line 2 parallel
Arrangement, break line 1 is moved towards in inside and 2-3 hydraulic support of the distance between break line 2 is moved towards in outside, and width is about 2.5~
5m。
It constructs below transition bracket 10, the anchor cable of arrangement protrudes into hard direct top through weak directly top, guarantees direct
Top 7 forms more completely combination rock beam, to form complete lane side, adjusts anchor pole and anchor cable according to roof strata integrality
Support density increases support density when Roof rock feature is poor, layering is more or cranny development；When Roof rock feature is preferable, layering is few
And top plate it is complete when, reduce the support density of anchor shaft anchor cable.
In addition, as shown in fig. 6, tendency break line be broken line, as the reduction frictional force of the medial angle of broken line is gradually increased,
So as to adjust the angle of broken line according to actual condition of construction, realizes the control to top plate falling speed, cut by improving
The arrangement of top line reduces the falling speed for cutting top to increase the contact area after cutting top.
The maximum that step D. calculates combination rock beam hangs apex distance, and top step pitch is cut in determination, and specific maximum outstanding apex distance can basis
Production data calculates determine in fact, can also be determined according to the actual measurement situation of connected working face, can also pass through roof strata
Distribution and lithology are determined by theoretical calculation.Top is cut in 4 location arrangements of working face open-off cut eye, first tendency in the tunnel of gob side entry retaining
Line is inclined to break line with 2~3m of propulsion interval arrangement Article 2 of working face.It cuts top step pitch and is less than maximum outstanding apex distance, working face
It is often advanced beyond the distance one tendency break line of arrangement for cutting top step pitch, concrete condition is according to the construction during the advance of the face
It is adjusted.
Tendency break line 3 cut that top depth is equal to that outside moves towards break line 2 cut top depth, tendency break line 3 cuts top
It drills to the inclination of 9 side of goaf and tilt angle is less than 5 °, ensure that combination rock beam is whole and smoothly fall.
By arranging that break line is moved towards in parallel inside and outside moves towards break line formation and cuts top region, cutting in the region of top
Direct top part is cut the tunnel side formation lane side for dropping down onto gob side entry retaining, mentioned due to cutting top region by arrangement tendency break line
Preceding setting anchor pole and anchor cable, thus at lane to cut top part complete, enter tunnel so as to avoid a large amount of spoils, save gear cash
Etc. processes.
Step E. is by moving towards break line 1 in tendency break line 3, inside and outside moves towards break line 2 and carries out hydraulic fracturing
Or top is cut in directional cumulation explosion completion, so that combination rock beam falls to forming lane side, blocks the seam between lane side and back
Gap.Gap between lane side and back is filled closure by jet expansion foam or whitewashing, due to lane side entirety
It completely, is only that there are gaps between lane side top or combination rock beam block, so the plugging construction to gap is convenient.
It is cut by three break lines and falls part directly top 7, form lane side, cut the stress transfer for having cut off top plate after pushing up, have
Effect avoids goaf Xuan Ding, improves the ambient stress of gob side entry retaining, reduces the confining pressure of gob side entry retaining country rock, effectively
Control the rock deformation in gob side entry retaining tunnel.
Step F. repeats step B to E with the advance of the face, cuts top paragraph by paragraph along working face, combines what rock beam was formed after cutting top
Class cuboid sillar, which is arranged closely in by lane, forms lane side, and roadway surrounding rock withdraws from hydraulic prop after stablizing, and completion is stayed along sky
Lane.
This method also has reduction driving face, so that alleviating digging connects nervous problem, and can not stay coal
Column reduces the waste of coal resources, prevents stress of coal pillar from concentrating, to avoid coal and gas prominent dangerous；Since this method is not required to
It carries out roadside packing and builds a wall to keep off cash, it is only necessary to carry out cutting top in transition bracket region, stay the construction in lane empty to increase
Between, stay influence of the lane construction to working face extraction smaller.In addition the present invention also has simple process, high efficient construction.
Embodiment 2
Cut the construction work for pushing up the gob-side entry retaining method in the direct lane Ding Cheng the seam period for further instruction transition bracket area three
Skill, by taking certain 1201 working face of mine and 1202 working faces as an example, the present invention is described in further detail.
1201 working faces and 1202 working faces of the mine are adjacent, main to adopt 2 coals, and coal seam thickness be averaged 3.2m, coal seam layer position
Stablize, thickness change is little.The bottom-up Sandy Silt average thickness that is followed successively by of roof strata is about 0.8m；The average thickness of packsand
Degree is about 2.8m；Siltstone average thickness is about 7m.Stope drift active workings tunnel the bottom of along, and section configuration is rectangle, two working faces it
Between stay using the method for gob side entry retaining and set stope drift active workings.
The Specific construction step that the method that provides through the invention carries out gob side entry retaining includes:
The tunnel of step A. gob side entry retaining use 6 strengthening supporting of anchor pole 5 and anchor cable, wherein between anchor pole 5 array pitch be 1 ×
Array pitch is 2 × 2m, length 4m between 1m, length 1.5m anchor cable 6；Hydraulic prop is set every 0.5m by lane, is carried out interim
Supporting, hydraulic prop are convenient in top board construction using special bracket.
Step B. moves towards break line on the inside of the advance position arrangement of the tunnel inner working face of gob side entry retaining, applies in tunnel
Work can be with the arrangement break line of 50~100m of first advance, and top drilling is cut in mainly setting, convenient for passing through explosion or hydraulic pressure
Fracturing cuts top.
Wherein the tunnel inside that break line 1 is arranged in gob side entry retaining is moved towards in inside, and inside is moved towards break line 1 and passed through out of tunnel
Direct top is worn, reaches base object model 7, break line 1 is moved towards in inside can also tilt certain angle to working face side, and inclination angle is answered small
In 4 ° or so.In addition, the depth that break line 1 is moved towards in inside is greater than the thickness 3.6m on directly top 7, top drilling is cut in mine setting
Depth is 6m.
Step C. moves towards break line on the outside of working face rear is arranged, break line 1 is moved towards in inside and break line 2 is moved towards in outside
Between formed cut top region.It cuts top region to fix by anchor pole and anchor cable, fixed rock stratum forms combination rock beam, returns with working face
It adopts while adding anchor pole 5 and anchor cable 6 cutting top region, start construct anchor pole and anchor cable, working face under working face transition bracket
Break line is moved towards in construction outside after propulsion.
The height 3.2m that break line 2 is greater than tunnel from face roof through the thickness of overlying rock is moved towards in outside, is run through
Overlying rock with a thickness of 0.8m+2.8m=3.6m, outside move towards break line cut top depth be H, according to formula: H > 3.6m >
3.2m determines that outside moved towards break line cuts top depth, cuts top drilling 3.8m according to top depth construction is cut.
Outside moves towards break line 2 and is arranged in working face rear, and break line 1 is moved towards in inside, and with outside to move towards break line 2 parallel
Arrangement, break line 1 is moved towards in inside and 3 hydraulic supports of the distance between break line 2 are moved towards in outside, and width is about 4.5m.
It constructs below transition bracket 10, the anchor cable of arrangement protrudes into hard direct top through weak directly top, guarantees direct
Top forms more completely combination rock beam, to form complete lane side, array pitch is between anchor pole is arranged according to tunnel actual conditions
0.8 × 0.8m, rock-bolt length 1.8m, array pitch is 1.6 × 1.6m between anchor cable, and the length of anchor cable is 3.2m.
The maximum that step D. calculates combination rock beam hangs apex distance, determines that cutting top step pitch is 3.6~5m, edge according to the outstanding apex distance of maximum
The tunnel in the lane Kong Liu is arranged in 4 location arrangements of working face open-off cut eye, first tendency break line with the propulsion interval 2.5m of working face
Article 2 is inclined to break line.It cuts top step pitch and is less than maximum outstanding apex distance, working face is often advanced beyond the distance arrangement one for cutting top step pitch
Item is inclined to break line, and concrete condition is adjusted according to the construction during the advance of the face.
Tendency break line 3 cut that top depth is equal to that outside moves towards break line cut top depth, the top of cutting of tendency break line 3 is bored
Hole is tilted to 9 side of goaf and tilt angle is 4 °, be ensure that combination rock beam is whole and is smoothly fallen.
Step E. is by moving towards break line 1 in tendency break line 3, inside and outside moves towards break line 2 and carries out hydraulic fracturing
Or top is cut in directional cumulation explosion completion, so that combination rock beam falls to forming lane side, blocks the seam between lane side and back
Gap.Gap between lane side and back is filled closure by jet expansion foam, since lane side is integrally complete, is only
There are gaps between lane side top or combination rock beam block, so the plugging construction to gap is convenient.
Step F. repeats step B to E with the advance of the face, cuts top paragraph by paragraph along working face, combines what rock beam was formed after cutting top
Class cuboid sillar, which is arranged closely in by lane, forms lane side, and roadway surrounding rock withdraws from hydraulic prop after stablizing, and completion is stayed along sky
Lane, construction is simple do not need to carry out gear cash processing.
Do not take the position working face extraction tunnel crossheading surrouding rock deformation for cutting top release serious in this mine according to monitoring, this
Working face is small using deformation of the surrounding rock in tunnel amount in the position crossheading in the lane Qie Dingcheng, avoids stress of coal pillar concentration, and mine pressure shows not
Obviously, spoil amount is few in tunnel, hence it is demonstrated that gob-side entry retaining method provided by the invention has preferable effect.
In addition this method 0.8m~1.3m girdle, in it is hard and with the mining conditions of upper plate under application effect more
It is good, find that the integrality and continuity of top plate can more preferably be guaranteed by cutting top in girdle in the application example in girdle, from
And realize and gather materials on the spot, reduce into the cost in lane.
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 (8)
1. the gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in a kind of transition bracket area three, which is characterized in that step includes:
A. the tunnel of gob side entry retaining uses anchor pole and Anchor reinforced support, and hydraulic prop is arranged by lane；
B. in the tunnel of gob side entry retaining, break line is moved towards in the advance position arrangement inside of working face；
C. break line is moved towards on the outside of the transition bracket area arrangement at working face rear, break line is moved towards in inside and outside trend cuts top
It is formed between line and cuts top region, add anchor pole and anchor cable with working face extraction while cutting top region；
D. the maximum for calculating combination rock beam hangs apex distance, determines and cuts top step pitch, and the top step pitch of cutting is less than maximum outstanding apex distance, working face
Often it is advanced beyond the distance arrangement tendency break line for cutting top step pitch；
E. combination rock beam falls to forming lane side, blocks the gap between lane side and back；
F. step B to E is repeated with the advance of the face, roadway surrounding rock withdraws from hydraulic prop after stablizing, complete gob side entry retaining.
2. the gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in a kind of transition bracket area three according to claim 1,
It is characterized in that, the inside is moved towards break line and is arranged in the tunnel of gob side entry retaining, and inside is moved towards break line and run through out of tunnel
It directly pushes up, reaches base object model；The depth that break line is moved towards in the inside is greater than immediate roof thickness MZ, the immediate roof thickness are as follows:Wherein haFor mining height, saFor the practical sedimentation value of rock beam, k is that rock beam lower part is caving the broken swollen coefficient in rock stratum.
3. the gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in a kind of transition bracket area three according to claim 1,
It is characterized in that, the height h that break line is greater than tunnel from face roof through the thickness of overlying rock is moved towards in the outside, is run through
Overlying rock from bottom to top every layer with a thickness of c1、c2、c3···cn, the top depth of cutting that break line is moved towards in outside is H, according to
Formula: H > c1+c2+c3+···+cn> h determines that outside moved towards break line cuts top depth.
4. the gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in a kind of transition bracket area three according to claim 3,
Be characterized in that, the tendency break line cut that top depth is equal to that outside moves towards break line cut top depth, be inclined to cutting for break line
Top drilling is to the inclination of goaf side and tilt angle is less than 5 °.
5. a kind of transition bracket area three according to any one of claims 1 to 3 stitches the period and cuts staying along sky for top self-contained lane side
Lane method, which is characterized in that the outside moves towards break line and is arranged in working face rear, and break line and outside are moved towards in the inside
Break line parallel arrangement is moved towards, break line is moved towards in inside and the distance between break line is moved towards as 2.5~5m in outside.
6. the gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in a kind of transition bracket area three according to claim 1,
It is characterized in that, the tunnel of the gob side entry retaining is in first tendency break line of working face open-off cut eye location arrangements, with pushing away for working face
Break line is inclined into interval 2~3m arrangement Article 2.
7. the gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in a kind of transition bracket area three according to claim 1,
It is characterized in that, the anchor cable protrudes into hard direct top through weak directly top, adjusts support density according to roof strata integrality.
8. the gob-side entry retaining method for cutting top self-contained lane side in the period is stitched in a kind of transition bracket area three according to claim 1,
It is characterized in that, the gap between the lane side and back is filled closure by jet expansion foam or whitewashing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274009.4A CN110030013B (en) | 2019-04-08 | 2019-04-08 | Gob-side entry retaining method for three-seam periodic roof cutting self-entry side of transition support area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274009.4A CN110030013B (en) | 2019-04-08 | 2019-04-08 | Gob-side entry retaining method for three-seam periodic roof cutting self-entry side of transition support area |
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| CN110030013A true CN110030013A (en) | 2019-07-19 |
| CN110030013B CN110030013B (en) | 2020-09-29 |
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| CN201910274009.4A Active CN110030013B (en) | 2019-04-08 | 2019-04-08 | Gob-side entry retaining method for three-seam periodic roof cutting self-entry side of transition support area |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577283A (en) * | 2020-06-20 | 2020-08-25 | 重庆大学 | Non-coal-pillar roadway retaining method based on mechanical cutting and composite blasting |
| CN112922598A (en) * | 2021-03-23 | 2021-06-08 | 中矿科创(北京)煤炭技术有限公司 | Method for reducing gob-side entry driving roof pressure through roof cutting and pressure relief |
| CN113216951A (en) * | 2021-06-03 | 2021-08-06 | 中南大学 | Non-explosive mechanical mining method for deep hard rock mine |
| WO2024077841A1 (en) * | 2022-10-14 | 2024-04-18 | 中国矿业大学 | Stress transfer method and device for low-position roof cutting and high-position directional fracturing of gob-side entry retaining |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397905A (en) * | 2013-04-17 | 2013-11-20 | 唐建新 | System and method for achieving natural striding, falling and filling of coal beds, flexible roadway protection and complete gob-side entry retaining |
| CN106121537A (en) * | 2016-07-22 | 2016-11-16 | 山东科技大学 | The Qie Dingcheng of gob side entry retaining without coal column lane construction method |
| CN108194088A (en) * | 2017-12-28 | 2018-06-22 | 西安科技大学 | A kind of soft top coal layer cuts top release gob-side entry retaining method without explosion |
| CN108643907A (en) * | 2018-05-11 | 2018-10-12 | 山东科技大学 | One kind being crushed direct top edge sky caving into lane without pillar mining method |
| CN108678769A (en) * | 2018-05-16 | 2018-10-19 | 山东科技大学 | Deep Gateway anchor note cuts top master control and stays lane method |
| CN208364123U (en) * | 2018-06-28 | 2019-01-11 | 山西霍尔辛赫煤业有限责任公司 | One kind stays top coal drift gob side entry retaining to cut top release shield lane structure |
-
2019
- 2019-04-08 CN CN201910274009.4A patent/CN110030013B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397905A (en) * | 2013-04-17 | 2013-11-20 | 唐建新 | System and method for achieving natural striding, falling and filling of coal beds, flexible roadway protection and complete gob-side entry retaining |
| CN106121537A (en) * | 2016-07-22 | 2016-11-16 | 山东科技大学 | The Qie Dingcheng of gob side entry retaining without coal column lane construction method |
| CN108194088A (en) * | 2017-12-28 | 2018-06-22 | 西安科技大学 | A kind of soft top coal layer cuts top release gob-side entry retaining method without explosion |
| CN108643907A (en) * | 2018-05-11 | 2018-10-12 | 山东科技大学 | One kind being crushed direct top edge sky caving into lane without pillar mining method |
| CN108678769A (en) * | 2018-05-16 | 2018-10-19 | 山东科技大学 | Deep Gateway anchor note cuts top master control and stays lane method |
| CN208364123U (en) * | 2018-06-28 | 2019-01-11 | 山西霍尔辛赫煤业有限责任公司 | One kind stays top coal drift gob side entry retaining to cut top release shield lane structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577283A (en) * | 2020-06-20 | 2020-08-25 | 重庆大学 | Non-coal-pillar roadway retaining method based on mechanical cutting and composite blasting |
| CN112922598A (en) * | 2021-03-23 | 2021-06-08 | 中矿科创(北京)煤炭技术有限公司 | Method for reducing gob-side entry driving roof pressure through roof cutting and pressure relief |
| CN113216951A (en) * | 2021-06-03 | 2021-08-06 | 中南大学 | Non-explosive mechanical mining method for deep hard rock mine |
| CN113216951B (en) * | 2021-06-03 | 2021-12-14 | 中南大学 | Non-explosive mechanical mining method for deep hard rock mine |
| WO2024077841A1 (en) * | 2022-10-14 | 2024-04-18 | 中国矿业大学 | Stress transfer method and device for low-position roof cutting and high-position directional fracturing of gob-side entry retaining |
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