CN105065001B - A kind of gob side entry driving recovery method of overlength advance distance working face - Google Patents
A kind of gob side entry driving recovery method of overlength advance distance working face Download PDFInfo
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- CN105065001B CN105065001B CN201510463081.3A CN201510463081A CN105065001B CN 105065001 B CN105065001 B CN 105065001B CN 201510463081 A CN201510463081 A CN 201510463081A CN 105065001 B CN105065001 B CN 105065001B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000011084 recovery Methods 0.000 title claims abstract description 37
- 239000003245 coal Substances 0.000 claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 claims abstract description 61
- 238000005065 mining Methods 0.000 claims abstract description 38
- 239000011435 rock Substances 0.000 claims description 17
- 230000005641 tunneling Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
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- 238000005516 engineering process Methods 0.000 abstract description 11
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- 230000003245 working effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
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- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
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Abstract
The invention discloses a kind of gob side entry driving recovery method of overlength advance distance working face, the overlength advance distance working face arranges that the recovery method includes using double lanes：A, during carrying out back production to stope, in the first coal column gob side entry driving is carried out along mining direction, to form gob side entry in first coal column, first coal column using double lane arrangements between the stope and its subsequent duty face by staying the coal column set；B, after the stope back production terminates, back production is carried out to its subsequent duty face when, continue driving and form the gob side entry, and described subsequent duty face is exploited in back production along the gob side entry.The recovery method of the present invention solves the contradiction between gob side entry driving and overlength advance distance working face mining, gob side entry driving technology is applied in the exploitation of overlength advance distance working face, reduces and damage using a large amount of coals caused by double lane arrangements and solve the problems, such as that gob side entry driving needs jump to adopt.
Description
Technical field
The present invention relates to the recovery method of underground mine, more particularly to a kind of overlength advance distance working face is using double lanes cloth
Put the recovery method being combined with gob side entry driving.
Background technology
The characteristics of gob side entry driving has high stoping rate, tunnel easy to maintain with driving, is greatly developed, is taken at home
Great successes were obtained, such as remaining loyal woods et al. to the rational position of high working face gob side entry driving, rational width and excavates tunnel most
The good time expand research (Suitable Position of Gob-Side Driving Entry in Large Mining Height Face simulate with application mining with safety engineering journal,
2006,33(2)：197-200), and Zhang Kexue et al. then further provides the placement technique in deep fractures group's gob side entry driving
(the determination coal journals of deep fractures group's gob side entry driving protection pillar rational width, 2011,36 (supplementary issues 1)：28-35).It is comprehensive
From the point of view of, gob side entry driving technology at present be applied to include it is thin, it is middle thickness and high seam including island working face, deep fractures group with
And the conventional mine with complex conditions such as Burst Tendency coal seam.
It will be appreciated by those skilled in the art that gob side entry driving is the goaf driving stope drift active workings along a upper working face, one
As retain 3-5m coal column between upper one work face goaf, and the motion of overlying rock usually requires lasting 1 year even more
The long time, therefore generally require jump and adopt, i.e., remote coal seam is first adopted, turns around to adopt phase again after waiting overburden of the goaf motion stabilization
The region in adjacent goaf.Adopted if do not jumped, directly along upper one work face goaf driving stope drift active workings and carry out back production, can be by
The influence of upper working face overburden of the goaf motion, it is difficult to ensure the safety of stope drift active workings.
Overlength advance distance working face typically refers to across pitch advance distance and reaches more than km working face, due to one
The high-yield and high-efficiency of working face can be realized by determining extension face advanced distance in scope, reached personnel reduction and enlargement, dropped low consumed mesh
, be advantageous to promote the development of mine height centralized production, therefore also as one of developing direction of coal mining.However, this
Art personnel are appreciated that because driving face needs to carry out air feed to heading end using portable blower band air duct, work as propulsion
Apart from it is long when, air duct and portable blower are generally difficult to meet air-conditioning requirement；And for Material Transportation, with the increase of tunnel length, institute
Need the transport difficult of material.And if tunneled using double lanes, as shown in figure 1, and staying the coal column 5 set to arrange some connection roadways 6,
Distinguished and admirable loop can be formed so during driving, an air intake of tunnel 1 in driving, through connection roadway, from an other lane
The return air of road 2；For haul, equally can transport driving from a haul of tunnel 3, another tunnel 4 and produce coal (spoil), haul with
Go out cash not interfereing with each other, solve the problems, such as that transport is disturbed with driving, so for overlength advance distance working face, it is necessary to using double
Lane is arranged, to meet ventilation and the requirement of assistant conveyance.
In being tunneled in double lanes, need to stay the coal column for setting large-size between general two stope drift active workings, mainly tunneled
With the influence of exploitation, the coal column among two tunnels tunneled due to double lanes needs to undergo adopting for first job face, then
Also to be second working face service, it is contemplated that successively undergo mining influence twice, double lane driving ordinary circumstances need to stay to set
30m, even more greatly.Therefore the problem of double lane drivings are present is concentrated mainly in pillar size, and pillar size is advantageous to greatly tunnel
Driving and maintenance, but lose that coal is more, coal damage is serious；And size is small, although high stoping rate, tunnel will undergo adopts twice, pick
Enter big with maintenance difficulties, or even the problem of can not using occur.
As the above analysis, for overlength advance distance working face, in order to ensure the use in tunnel, coal damage is seriously；Such as
Fruit uses gob side entry driving technology, can not ensure ventilation and the transport of material, and need jump to adopt, it may appear that island working face.At present,
Gob side entry driving technology there is no method to apply in the exploitation of overlength advance distance working face.
The content of the invention
It is an object of the invention to provide a kind of gob side entry driving recovery method of overlength advance distance working face, is solved with comprehensive
The pillar size that certainly the double lanes arrangements of overlength advance distance working face are brought is big and the problem of traditional gob side entry driving needs jump to adopt.
To achieve the above object, the present invention uses following technical scheme：
A kind of gob side entry driving recovery method of overlength advance distance working face, the overlength advance distance working face is using double
Lane arranges that the recovery method includes：
A, during carrying out back production to stope, gob side entry driving is carried out along mining direction in the first coal column, with
Just gob side entry is formed in first coal column, first coal column is between the stope and its subsequent duty face
The coal column set is stayed using double lanes arrangement；
B, after the stope back production terminates, to its subsequent duty face carry out back production when, continue driving and form institute
Gob side entry is stated, and described subsequent duty face is exploited in back production along the gob side entry.
According to the recovery method of the present invention, it is preferable that the length of overlength advance distance working face should be greater than making goaf shape
Into the distance of sufficient mining, (distance for empirically, forming sufficient mining is 1.2-1.4H0, wherein, H0For working face buried depth),
So as to create more stable condition for the gob side entry driving in subsequent duty face.It is further preferred that overlength advance distance working face
For length more than 1000m working face；It is highly preferred that overlength advance distance working face is work of the length in more than 3000m
Face.
According to the recovery method of the present invention, it is preferable that first coal column is close to the tunnel of the stope side
For lane under stope, first coal column is subsequent duty Mian Shang lanes close to the tunnel of the stope side, institute
State and be provided with connection roadway under stope between lane and subsequent duty Mian Shang lanes.
According to the recovery method of the present invention, it is preferable that in the gob side entry tunneling process, the coal and/or cash that excavate
Stone is transported and gone out via the subsequent duty Mian Shang lanes.
According to the recovery method of the present invention, it is preferable that in described subsequent duty face back production, the pick of the gob side entry
Enter between the propulsion position in position and described subsequent duty face and at least one connection roadway be present, tunneled in the gob side entry
Cheng Zhong, the coal and/or spoil excavated are transported to go out by the connection roadway via the subsequent duty Mian Shang lanes.
According to the recovery method of the present invention, it is preferable that described at least one connection roadway pushes away with the subsequent duty face
It is closed to enter between position the tunnel being provided with subsequent duty Mian Shang lanes.
According to the present invention recovery method, it is preferable that when gob side entry driving forms the gob side entry, the gob side entry with
Be installed with the second coal column between the goaf that described stope back production is formed, second coal column with it is described along empty lane
The width sum in road is less than X0, it is described
Wherein, m is that thickness, unit m are adopted in coal seam；λ is coefficient of horizontal pressure；For the internal friction angle in coal seam；C0For coal seam interface
Cohesive force；K is the factor of stress concentration；γ is rock stratum volume-weighted average；H is tunnel buried depth；PzFor the Support Resistance of coal side, unit
kN。
According to the recovery method of the present invention, it is preferable that characterized in that, during the stope back production,
When the stope back production starts to tunnel the gob side entry, and the back production position of the stope after at least T days
The distance for putting the driving position for being ahead of the gob side entry is at least L1；
The L1=T × v, it is described
Wherein, v is the drawing speed of the stope；E is the modulus of elasticity of base object model rock beam；η is basic rimrock
The loss moduli of beam；qzFor the load on rock beam top；LmFor base object model rock beam broken mechanics；R is the compression strength of broken swollen rock, single
Position N/ ㎡；H is to adopt thickness, unit m；kcFor the remaining broken swollen coefficient of caved gangue；mzFor immediate roof thickness, unit m.
According to the recovery method of the present invention, it is preferable that during the back production of the subsequent duty face, the gob side entry
The distance of the driving position propulsion position that is ahead of the subsequent duty face be more than L2, the L2For the back production of subsequent duty face when
Advanced mining influence distance；It will be understood by those skilled in the art that for two adjacent working faces, its advanced mining influence
Distance is generally suitable, and therefore, the advanced mining influence distance when L2 can also be stope back production can be by returning
Field measurement during mining face back production obtains.
Compared with prior art, there is advantages below in recovery method of the invention：
1st, asked for overlength advance distance working face using Coal Loss is big, roadway maintenance is difficult caused by double lane drivings
Topic, stayed present invention firstly provides the double lane drivings of overlength advance distance working face along empty along technology of adopting, Ji Shuan lanes arrangement
If coal column in along mining direction carry out gob side entry driving, solve between gob side entry driving and overlength advance distance working face mining
Contradiction, gob side entry driving technology is applied in the exploitation of overlength advance distance working face, reduced because needs are using double lanes cloth
A large amount of coals damage and solve the problems, such as that gob side entry driving needs jump to adopt and causes island working face caused by putting.
2nd, using the recovery method of the present invention, subsequent duty Mian Shang lanes only undergo driving and adopted with the stope
Influence, scrapped during subsequent duty face is exploited by mining influence section, it is overall not by secondary mining influence；And gob side entry edge is adopted
Dead zone is tunneled, experience driving and the mining influence in subsequent duty face, therefore gob side entry and subsequent duty Mian Shang lanes are subjected only to dig
The influence entered and once adopted, so that the maintenance in tunnel is more simple；Lane under the stope of Yuan Shuan lanes driving simultaneously
Do not wasted with subsequent duty Mian Shang lanes, it is ensured that overlength dash and assistant conveyance.
Brief description of the drawings
Fig. 1 is that schematic diagram is arranged in double lanes of overlength advance distance working face in the prior art；
Fig. 2 is the back production schematic diagram of stope in recovery method of the invention；
Fig. 3 is stress distribution schematic diagram of the exploiting field at the A-A above section and subsequent duty face side；
Fig. 4 is the back production schematic diagram in subsequent duty face in recovery method of the invention；
Fig. 5 is the distribution curve of stress figure above the side of subsequent duty face in embodiment；
Fig. 6 adopts rear tunnel deformation curve figure to be secondary in embodiment.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail, but the present invention is not limited to this.
Involved overlength advance distance working face is well known to those skilled in the art in the recovery method of the present invention
Concept, in the present invention, it is preferred to, the length of overlength advance distance working face should be greater than making goaf to form sufficient mining
(distance for empirically, forming sufficient mining is 1.2-1.4H to distance0, wherein, H0For working face buried depth), so as to be the work that continues
The gob side entry driving for making face creates more stable condition.It is further preferred that overlength advance distance working face be length in 1000m
Working face above；It is highly preferred that overlength advance distance working face is working face of the length in more than 3000m.
The overlength advance distance working face is arranged using double lanes, as shown in Fig. 2 for the ease of understanding and illustrating, in Fig. 2
Two adjacent overlength advance distance working faces using double lane arrangements, respectively stope and its subsequent duty are only shown
Face, it will be understood by those skilled in the art that in actual production, a certain fixation is not refered in particular in stope and subsequent duty face
Working face, and refer to the working face just exploited in multiple working faces, and adjacent with stope, and can be in back production work
Make the working face that face back production is completed followed by exploit.However, for ease illustration and understanding, for two works shown in Fig. 2
Make face, will respectively fixedly be referred to as stope and subsequent duty face.
Further, since arrange that the tunnel formed is more using double lanes, for the ease of understanding and illustrating, in the present invention,
By stope by the first coal column side tunnel (namely first coal column lean on the stope side lane
Road) it is referred to as lane under stope, the tunnel of stope opposite side is referred to as lane on stope；Similarly, will continue
Working face claims by the tunnel (namely first coal column leans on the tunnel of subsequent duty face side) of the first coal column side
For subsequent duty Mian Shang lanes, the tunnel of subsequent duty face opposite side is referred to as subsequent duty Mian Xia lanes.
As shown in Fig. 2 during recovery method of the present invention includes a, carries out back production to stope 21,
Gob side entry driving is carried out along mining direction in first coal column 23, it is described to form gob side entry 24 in first coal column 23
First coal column 23 using double lane arrangements between the stope 21 and its subsequent duty face 22 by staying the coal column set.
Wherein, connection roadway 27 is provided with stope between lane 25 and subsequent duty Mian Shang lanes 26, so that goods and materials are gentle
Stream can preferably exchange between Shuan Xiang.It will be understood by those skilled in the art that for not using temporarily in exploitation process
Connection roadway, it can set tunnel is closed (to make accompanying drawing apparent, not show that this kind of tunnel is close in figure of the present invention wherein
Close), to avoid disturbing air-flow conveying.
When the stope 21 is exploited, it is divulged information and transport can be according to ventilation during traditional double lane arrangements and fortune
It is input into row.Preferably, in the tunneling process of gob side entry 24, the coal and/or spoil excavated is via the subsequent duty face
Upper lane 26 is transported, and good ventilation is kept using the connection roadway between subsequent duty Mian Shang lanes 26.In a specific implementation
In example, before gob side entry 24 is tunneled, the subsequent duty Mian Xia lanes 28 (one in double lanes are tunneled by double lanes arrangement first
It is individual) and double lane in another tunnel 29, to the location of starting cut 30 of subsequent duty face 22, the stope 21 is adopted backward
Dead zone direction is tunneled, and reaches gob side entry driving position by subsequent duty Mian Shang lanes 26, in the back production of stope 21
Cheng Zhong, tunnel out gob side entry 24.
It will be understood by those skilled in the art that set is stayed under stope between lane 25 and subsequent duty Mian Shang lanes 26
One coal column 23, can be by the mining influence of the stope 21.Wherein, after the stope 21 forms goaf,
As shown in figure 3, four stress distribution areas can be formed in the side of subsequent duty face 22：Fracture area I, plastic zone II, elastic region stress
Raised portion III and initial stress area IV, it is contemplated that the effect in subsequent duty Mian Shang lanes 26 is to meet that double lane drivings and auxiliary are logical
Wind, and can be as the air return way of the stope 21, therefore, adopting for stope 21 determines what it was safeguarded
It is difficult to degree.To make the subsequent duty Mian Shang lanes 26 easily safeguard, the subsequent duty Mian Shang lanes 26 are preferably arranged on institute
State in initial stress area, both ensure safety, and because the recovery method of the present invention combines gob side entry driving technology, thus again without
It need to worry that coal damage is serious.Wherein, initial stress area and elastic region stress raised portion border can " coal column be held according to document
Load, subregion and subsequent duty face base object model mechanical model and calculating are analyzed " (Wang Zhiqiang, Gao Yang, fourth wait coal columns to carry, divide from big
Area and subsequent duty face base object model mechanical model are with calculating analysis [J] coal engineerings, 2013, Vol.1 (1):79-82.) in it is public
Open method (namely calculate advanced mining influence away from method) determine, repeat no more here；Or those skilled in the art can
The advanced mining influence distance surveyed to understand, when can be according to stope back production determines initial stress area and elastic region stress
The border of raised portion, i.e., advanced mining influence distance is the distance between initial stress area and goaf.
When gob side entry driving forms the gob side entry 24, the gob side entry 24 and the described back production of stope 21
The second coal column 31 is installed between the goaf formed afterwards, it is preferable that the gob side entry 24 is arranged in the back production work
Make in the low stress area that is formed after the back production of face 21, i.e., the width sum of described second coal column and the gob side entry is less than X0,
It is described
Wherein, m is that thickness, unit m are adopted in coal seam；λ is coefficient of horizontal pressure；For the internal friction angle in coal seam；C0For coal seam interface
Cohesive force；K is the factor of stress concentration；γ is rock stratum volume-weighted average；H is tunnel buried depth；PzFor the Support Resistance of coal side, unit
kN。
Wherein, the width of the gob side entry 24 can be with the span length of gob side entry driving conventional in the art, such as 5
Rice.
In the present invention, to make the maintenance of the gob side entry 24 more simple, it is preferable that the present invention also makes full use of work
Make the characteristics of face is overlength advance distance working face, during the back production of stope 21, when the actual mining
The back production of face 21 starts to tunnel the gob side entry 24 after at least T days, and the back production position of the stope 21 is ahead of
The distance of the driving position of the gob side entry 24 is at least L1；
The L1=T × v, it is described
Wherein, v is the drawing speed of the stope；E is the modulus of elasticity of base object model rock beam；η is basic rimrock
The loss moduli of beam；qzFor the load on rock beam top；LmFor base object model rock beam broken mechanics；R is the compression strength of broken swollen rock, single
Position N/ ㎡；H is to adopt thickness, unit m；kcFor the remaining broken swollen coefficient of caved gangue；mzFor immediate roof thickness, unit m.
Thus, when the gob side entry 24 tunnels, the mining influence of its stope 21 being subject to is smaller.
As shown in figure 4, recovery method of the present invention also include b, after the back production of stope 21 terminates, it is right
When its subsequent duty face 22 carries out back production, continue driving and form the gob side entry 24, and described subsequent duty face 22 exists
Exploited during back production along the gob side entry 24.
Preferably, in described 22 back production of subsequent duty face, driving position and described of the gob side entry 24 connect
At least one connection roadway 27 be present between the propulsion position of continuous working face 22, in the tunneling process of gob side entry 24, excavate
Coal and/or spoil transported by the connection roadway 27 via the subsequent duty Mian Shang lanes 25 to go out.Meanwhile described along empty lane
In the tunneling process in road 24, the tunnel in the connection roadway and subsequent duty face can be utilized to keep good ventilation.
In a preferred embodiment of the present invention, described at least one connection roadway 27 and the subsequent duty face 22
Promote position between be provided be located at subsequent duty Mian Shang lanes 26 in tunnel closed 32.Thus, can not only make described along sky
Tunnel 24 is divulged information more good, while may not necessarily safeguard the part tunnel in subsequent duty Mian Shang lanes 26, by closed processes,
Ensure safety.
In the present invention, it is further to make the maintenance of the gob side entry 24 more simple, it is preferable that in the work that continues
During making the back production of face 22, the driving position of the gob side entry 24 is ahead of the propulsion position in the subsequent duty face 22
Distance at least L2；The L2For the back production of subsequent duty face when advanced mining influence distance；Those skilled in the art can manage
Solution, for two adjacent working faces, its advanced mining influence distance is generally suitable, and therefore, the L2 can also be back production work
Make the advanced mining influence distance during back production of face, field measurement when can be by stope back production obtains；Or according to
(Wang Zhiqiang, Gao Yang, fourth is certainly for above-mentioned document " coal column carrying, subregion and subsequent duty face base object model mechanical model are analyzed with calculating "
It is big to wait the carrying of coal columns, subregion and subsequent duty face base object model mechanical model to analyze [J] coal engineerings with calculating, 2013, Vol.1
(1):Method disclosed in 79-82.) determines.
The recovery method of the present invention is on the basis of overlength advance distance working face is using double lane arrangements, further in back production
Gob side entry driving in coal column between working face 21 and its subsequent duty face 22, gob side entry 24 is formed, so as in its subsequent duty
Face 22 can exploit when exploiting along gob side entry 24.Certainly, it will be understood by those skilled in the art that generally being set in coal mining
There is the working face of multiple (such as more than 5 or 10) side by side, therefore, in actual production, stope described herein is simultaneously
It is non-to refer in particular to the working face of a certain fixation, and refer to the working face that exploitation is waited in multiple working faces, the subsequent duty face is same
Not refer in particular to a certain stationary face, and refer to it is adjacent with stope, and can stope complete back production be followed by
The working face of exploitation.Therefore, in actual production, when a upper working face (i.e. former stope) in former subsequent duty face returns
New stope will be turned into after the completion of adopting, so repeated, so that the recovery method of the present invention can repeat to implement
In above-mentioned multiple working faces.
Gob side entry driving technology is dexterously incorporated into the exploitation of the overlength advance distance working face of Liao Shuan lanes arrangement by the present invention
In, and order mining can be achieved in all working face, not only avoid the serious coal damage that traditional double lane arrangements are difficult to avoid,
Also successfully solve the drawbacks of gob side entry driving production technique needs jump to adopt, kill two birds with one stone, realize and be generally impossible to use simultaneously
The double lane placement techniques of overlength advance distance working face is combined with the advantage of gob side entry driving, and the it is also possible that maintenance in tunnel
It is more simple.For this technology, inventor is also named as being adopted along sky is suitable for the double lane drivings of overlength advance distance working face
Technology.
In addition, by following examples, those skilled in the art it will be further appreciated that the technical advantage of the present invention extremely
Huge economic benefit.
Embodiment
Examine and breathe out the plain exploiting field of colliery 31 exploitation 3-1 coal seams, coal seam thickness 2.05-7.15m, average out to 5.25m, coal seam is averagely inclined
Angle is 1 °, and geological structure is simple, is monoclinal structure.The stope of research is located in the middle part of 31 exploiting fields, working face tendency length
300m, length 5000m is promoted, arranged using double lanes, stayed the coal column clear span 18.42m set between double lanes, one is opened every 60-70m
Network lane, reserved coal pillar and tunnel are subjected to mining influence twice.
Lateral (i.e. the direction in the subsequent duty face) stress distribution in the goaf of stope is surveyed, one
It is secondary adopt (stope exploitation) in the case of, peak stress point specifically should apart from goaf 25m, peak-peak 22.94MPa
Power distribution situation is shown in that (wherein, abscissa is the distance between subsequent duty face side and goaf to Fig. 5, and ordinate should for top plate
Power), there is the situation that top coal is dropped, wire netting is broken and secondary side wire netting destroys in actual inter-road road of exploiting.
During subsequent duty face is exploited, advanced pressure peak region increases to 30-50m scopes, and surveys stope
Advanced mining influence during back production is away from for 144m, and bottom distension is serious in the range of 80m in front of rib, positive to help wall caving serious, pair side shoulder nest
Extruding forms pendant pocket.It is broken in the middle part of local top plate, sink.When away from working face 30m, bottom distension starts to aggravate connection roadway, most serious
Location bottom distension height 1.5m or so, secondary mining induced roadway deformation as shown in Figure 6, wherein, abscissa is tunnel and continued work
Make the distance between the propulsion position in face,For the distance between tunnel roof and floor,Between roadway's sides
Distance.
From the point of view of field measurement, original stays the double lanes drivings of the 18.46m coal columns set, and assistant conveyance crossheading is by once adopting shadow
Moderate finite deformation occurs for loud maintenance with destroying, and can not meet to use under secondary mining influence.
On this basis, propose double lanes driving gob side entry using the present invention along the arrangement adopted.Relevant parameter selects
It is taken as：
Measured drawing 5 is distributed according to bearing stress, determines that the first coal column stays and sets width A still as 40m (being in initial stress area),
Second coal column B takes 5m, and (gob side entry width is 5m, now X0About 25m), wherein：Working face buried depth 400m, E=53.9GN/
m2, η=4.5GPa, R=45kN/m2, kc=1.1, qz=10MPa, h=2.23m, mz=5.2m, Lm=17m, v=10m/d.
Thus, during the stope back production, when the stope back production starts after at least 143 days
Tunnel the gob side entry, and the back production position of the stope be ahead of the driving position of the gob side entry away from
From at least 1430m；
During subsequent duty face is exploited, the driving position of the gob side entry is ahead of the propulsion position in the subsequent duty face
The distance put is at least 144m；.
In whole recovery process, the tunnel used does not occur gross distortion, safeguards simple；And due to final remaining coal
Post is only 5m wide, and economic benefit is clearly.
Claims (7)
1. a kind of gob side entry driving recovery method of overlength advance distance working face, the overlength advance distance working face is using double lanes
Arrangement, the recovery method include：
A, to stope carry out back production during, in the first coal column along mining direction carry out gob side entry driving, so as to
Gob side entry is formed in first coal column, first coal column uses between the stope and its subsequent duty face
Double lane arrangements stay the coal column set；
B, after the stope back production terminates, to its subsequent duty face carry out back production when, continue driving and form the edge
Empty tunnel, and described subsequent duty face is exploited in back production along the gob side entry；
Wherein, when gob side entry driving forms the gob side entry, the gob side entry and institute's shape after described stope back production
Into goaf between be installed with the second coal column, the width sum of second coal column and the gob side entry is less than X0, it is described
Wherein, m is that thickness, unit m are adopted in coal seam；λ is coefficient of horizontal pressure；For the internal friction angle in coal seam；C0For the cohesion of coal seam interface
Power；K is the factor of stress concentration；γ is rock stratum volume-weighted average；H is tunnel buried depth；PzFor the Support Resistance of coal side, unit kN.
2. recovery method as claimed in claim 1, it is characterised in that first coal column is close to the stope side
Tunnel be stope under lane, first coal column close to the tunnel of subsequent duty face side be subsequent duty face on
Lane, connection roadway is provided between lane and subsequent duty Mian Shang lanes under the stope.
3. recovery method as claimed in claim 2, it is characterised in that in the gob side entry tunneling process, the coal that excavates
And/or spoil is transported and gone out via the subsequent duty Mian Shang lanes.
4. recovery method as claimed in claim 3, it is characterised in that described along sky in described subsequent duty face back production
At least one connection roadway be present between the driving position in tunnel and the propulsion position in described subsequent duty face, described along empty lane
In road tunneling process, the coal and/or spoil that excavate are transported to go out by the connection roadway via the subsequent duty Mian Shang lanes.
5. recovery method as claimed in claim 4, it is characterised in that described at least one connection roadway and the subsequent duty
Face promotes the tunnel being provided between position in subsequent duty Mian Shang lanes closed.
6. such as the recovery method any one of claim 1-5, it is characterised in that in the mistake of the stope back production
Cheng Zhong, when the stope back production starts to tunnel the gob side entry after at least T days, and the stope returns
The distance for adopting the driving position that position is ahead of the gob side entry is at least L1；
The L1=T × v, it is described
Wherein, v is the drawing speed of the stope；E is the modulus of elasticity of base object model rock beam；η is base object model rock beam
Loss moduli；qzFor the load on rock beam top；LmFor base object model rock beam broken mechanics；R be broken swollen rock compression strength, unit N/
㎡；H is to adopt thickness, unit m；kcFor the remaining broken swollen coefficient of caved gangue；mzFor immediate roof thickness, unit m.
7. such as the recovery method any one of claim 1-5, it is characterised in that in the mistake of subsequent duty face back production
Cheng Zhong, the distance that the driving position of the gob side entry is ahead of the propulsion position in the subsequent duty face are at least L2, the L2
For stope back production when advanced mining influence distance.
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| CN106761746A (en) * | 2016-11-29 | 2017-05-31 | 安徽理工大学 | A kind of method for determining island working face reserved coal pillar rational width |
| CN107905807A (en) * | 2017-12-13 | 2018-04-13 | 陕西煤业化工技术研究院有限责任公司 | A kind of future small coal pillar comprehensive mechanical coal mining supporting construction and construction method |
| CN109798116B (en) * | 2019-04-04 | 2022-04-01 | 中国矿业大学(北京) | Method for realizing complete coal pillar-free mining area or belt area of double-wing arrangement working face |
| CN110306983A (en) * | 2019-06-15 | 2019-10-08 | 龙口矿业集团有限公司 | A kind of corner pillar face recovery method in exploiting field |
| CN110886611B (en) * | 2019-12-06 | 2020-12-25 | 河南力行科创矿山技术开发有限公司 | Gob-side entry driving process for high-gas large-mining-height working face |
| CN111119903B (en) * | 2019-12-16 | 2022-04-08 | 西安中铁工程装备有限公司 | Method for gob-side entry driving of coal mine |
| CN112483090A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for preventing and controlling rock burst under three-dimensional coal pillar |
| CN114109386B (en) * | 2021-12-10 | 2023-09-19 | 国家能源投资集团有限责任公司 | Underground coal mining working face regulating and controlling method |
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| CN117027954B (en) * | 2023-09-19 | 2024-06-21 | 山东能源集团有限公司 | System and method for monitoring overlying strata and coal pillars of roof of gob-side entry |
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