CN105156110A - Dynamic disaster mine district roadway structure and method for developing same - Google Patents
Dynamic disaster mine district roadway structure and method for developing same Download PDFInfo
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Abstract
The invention discloses a dynamic disaster mine district roadway structure and a method for developing the same. Main disaster causing factors of district stoping roadway groups of 'U-shaped ventilation systems and auxiliary functional roadways' of dynamic disaster mine districts are controllably (adjustably) screened by the aid of multi-factor elimination processes on the premise of field regional dynamic disaster prevention design ideas from geological and mining technical angles, adjustable and controllable sub-factors are analyzed, lateral stress distribution laws of gobs are utilized, and accordingly the novel arrangement method for reducing disasters of dynamic disaster mine district roadways can be implemented. The dynamic disaster mine district roadway structure and the method have the advantages that the ideas and the method are scientific and reasonable and have practical reference significance, accordingly, coal loss can be reduced, roadway disaster reducing and maintaining costs can be saved, roadway dynamic disasters can be reduced from the source, and the safety can be improved during production.
Description
[technical field]
The invention belongs to underground coal mine dynamic disaster prevention and control field, be specifically related to a kind of dynamic disaster mining areas of mine tunnel mitigation layout and development method.
[background technology]
Dynamic impact type disaster is one of important disaster of super high seam top coal caving mine.Refer generally in getting working face progradation, due to special geology lithology condition and the Mining technology condition of ocurrence of coal seam, around mine working and stope, coal and rock is owing to being subject to strong action of underground, coal rock deformation can be discharged and produce with suddenly, sharply, the fierce destruction dynamic impact Disasters that is feature.As quick-friedly in coal (rock) occurring instantaneously with the form of coal (rock) big gun at underground coal mine, is exactly a kind of dynamic phenomenon of energy abrupt release.Before the quick-fried impact of mine coal (rock) occurs, generally there is no obvious Macroscopic Precursors.Impact occur time, coal (rock) body is dished out suddenly, cause support to lose, side fall roof, tunnel blocking, casualties, and with the huge sound and rock mass vibrations.If when there is high gas layer dynamic impact, also with a large amount of Gas, can very easily bring out secondary disaster accident, thus cause huge economic loss to colliery.
China is thick in super high seam rich reserves, accounts for 47.7% of proved reserves, thick adopt mining technique to have to super high seam output is large, efficiency high feature, the high seam output of annual exploitation accounts for 40% ~ 50% of national coal production.Exploiting field stope drift active workings connect the roadway engineering amount that sequence needs annual new pick tens thousand of kilometers, and fully mechanized coal face tunnel is when considering the threat of the disasters such as roof water, gas, coal spontaneous combustion, work plane Shuan Xiang, many lanes layout also become a kind of main gateway layout method, more in mining area application such as Shenhua of China, Jincheng, refined length at present.If this many lanes system of longwall top coal caving exploiting field stope drift active workings is arranged unreasonable, not only can cause the generation of dynamic disaster, also can increase roadway opening and maintenance cost, increase loss of coal pillar.
Domestic typical dynamic disaster (based on the quick-fried type of coal petrography) mine, as Huating Gansu colliery, Yan Bei colliery, Yima eternal lasting colliery, Gu Shan colliery, the flat village, Hu Jiahe colliery etc., getting working face coal petrography has the feature of sudden, instantaneous shock and considerable damage, coal petrography elastic strain energy is gathered and release instantaneously, and based on top, coal seam floor failure, two help destruction to be auxiliary.Power manifests the personal safety of problem serious threat mine normal production and workman.
Practice shows, mine motive force impingement disaster occurs in (partly because geological structure reason occurs in development end) near stope mostly, comprehensive coal face due to mining height comparatively large, the fracture rotary deformation space on old top is large, and lateral-supporting pressure influence scope is also just farther.On old top-hung top, the dynamic loading that causes of rupturing with under low level coal petrography static load superposition, coal or rock dynamic impact very easily occurs.And bearing pressure influence basin (influence area) has just become pit zone to take precautions against natural calamities stays the key of establishing with exploiting field coal pillar width.
In the diaster prevention and control of mine motive force impingement; usually point three levels; first level is that field with "nine squares" regionality forfends (mainly contain gateway layout method, method optimization, exploit topping, order is taken in Optimization Work face, optimize coal-mining method); second level is the technical improvement (as explosion and large-diameter borehole unloading technology) in digging space, and third layer time is individual protection (as disaster psychological counseling, hazardous area Individual protection equitment).Wherein, it is that dynamic impact type disaster mine effects a permanent cure work that field with "nine squares" regionality forfends, and roadway system preferred arrangement is carried out dredging of dynamic disaster from root and dodges.
At home, some dynamic impact disaster longwall top coal caving mines, exploiting field stope is in order to take into account many hazard managements such as water, fire, gas, and tunnel adopts roadway group system layout mostly.In order to better extraction work plane corner and goaf gas, above coal seam, rock stratum arranges separately a high-order gas drainage under suction lane, work plane both sides only need arrange that single U-shaped draft type can meet air-conditioning requirement, both sides adit only does function lane, auxiliary water drainage and goaf grouting, as shown in Figure 1.Due to the too many of function roadway layout and order is compact, little and irregular coal column group is various, and upper curtate working face mining causes proceeds posterolateral to occur the power hazardous area (red and yellow area) of high strength and moderate strength on a large scale.
[summary of the invention]
The object of this patent is the unreasonable design of optimizing power disaster mine " U-shaped ventilation system+miscellaneous function lane " exploiting field stope drift active workings group, reduces adjoint heavily stressed superposition and power manifests repeated corruptions.The thinking forfending design from regionality optimization is analyzed power and is caused the controlled sub-factor of calamity, by utilizing little (narrow) coal column goaf side to complete Novel tunnel system layout and development method to stress distribution law cleverly, the basis considering many diaster prevention and control function reduces (reduction) dynamic disaster occurrence frequency greatly.
The present invention is by the following technical solutions:
The development method in tunnel, a kind of dynamic disaster mining areas of mine, first digging upper curtate work plane, the work plane of digging this section again, wide coal column is reserved between upper curtate work plane and this section work plane, finally digging this section sluicing gallery between wide coal column, be thin coal pillar between described this section sluicing gallery and upper curtate work plane, finally strengthen the supporting intensity of this section sluicing gallery.
The tunnel that described upper curtate work plane is adjacent with coal column is return airway, and parallel with return airway is transportation roadway; The tunnel that described this section is adjacent with coal column is multifunctional tunnel, doublely does this section return aircourse and upper curtate sluicing tunnel, and the another side parallel with multifunctional tunnel is this section haulage drift.
The return airway of described upper curtate and transportation roadway digging simultaneously.
The return airway of described this section and transportation roadway digging simultaneously.
The axial direction in tunnel is consistent with the direction of maximum horizontal stress of mine.
After upper curtate working face extraction is stable, then thin coal pillar is stayed to tunnel lower curtate miscellaneous function lane along edge, goaf.
The supporting of described this section sluicing gallery adopts " U-shaped steel+anchor pole or anchor cable+wire lath+steel bar ladder beam or W-shaped steel band " forms compound tunneling boring support form.
Digging speed is 4-7m/d, and drawing speed is 3-5m/d.
A kind of dynamic disaster mining areas of mine tunnel structure, wide coal column is reserved with between upper curtate work plane and this section work plane, between wide coal column, digging has this section sluicing gallery, distance between this section sluicing gallery and upper curtate work plane is thin coal pillar, what this section was adjacent with wide coal column is multi-functional gallery, doublely does this section return airway and upper curtate sluicing lane, and multi-functional gallery opposite side is transportation roadway, what upper curtate was adjacent with thin coal pillar is return airway, and opposite side is transportation roadway.
Described upper curtate and this section gas suction road are arranged in above two tailentry sides, and flat apart from keeping equal apart from tailgate.
Compared with prior art, the present invention at least has following beneficial effect: tunnel of the present invention becomes 7 from original 9, a tunnel is arranged in coal column cleverly between upper and lower two work planes, utilize coal column that tunnel is set, on the basis meeting ventilation condition, save the loss of coal column, greatly reduce cost, and avoid the generation of dynamic impact disaster.
[accompanying drawing explanation]
Fig. 1 is arrangement diagram of the present invention;
Fig. 2 is that goaf side is to abutment pressure distribution figure;
Fig. 3 is digging procedure figure of the present invention;
Fig. 4 is " U " type ventilation system+miscellaneous function lane of existing power to evil mine " roadway group layout schematic diagram.
[detailed description of the invention]
The invention discloses a kind of dynamic disaster mining areas of mine roadway layout and method, by field with "nine squares", regional dynamic disaster forfends premised on mentality of designing, from geology and production technique angle, the exploiting field stope drift active workings group main factors causing disaster of multiple factors exclusive method to dynamic disaster mining areas of mine " U-shaped ventilation system+miscellaneous function lane " is adopted to carry out the screening of controlled (tune) property, by analyzing the sub-factor of controllable and utilizing goaf side to complete the new arrangement method of dynamic disaster mining areas of mine tunnel mitigation to stress distribution law, its idea and method science, rationally, there is actual reference, coal damage amount can be reduced, save tunnel mitigation and maintenance cost, weaken tunnel dynamic disaster from root to occur, improve the safety in producing.
In order to achieve the above object, the prerequisite (thinking) that the novel mitigation in tunnel, the present invention a kind of dynamic disaster mining areas of mine method for arranging is optimized comprises following content:
Content one: filter out regional to calamity factor, analyze the sub-factor of controllable.For the mine (field with "nine squares") running into dynamic impact phenomenon in driving and back production, this type of phenomenon occurred in roadway opening and back production to be fully taken into account when engineering design, carry out technical Analysis safeguard work in early stage.First the main cause causing dynamic impact disaster to manifest being divided into the large factor of geology and production technique two, from above-mentioned two large main factors, analyzing and filter out the sub-factor of controllable, is namely that section coal pillar stays and establishes mode, horizontal stress direction and base object model hardness.Wherein, top board (comprising coal body) hardness often adopts the explosion of broken top or set large-diameter borehole in coal petrography, technical release is carried out with this, to destroy the object that coal petrography mode that is complete and release concentrated stress realizes mitigation, but there is the feature of curing the symptoms, not the disease in technical danger of separating, can only play local mitigation, fall calamity effect, moreover there is technologic danger in explosion itself, forfends in thinking inadvisable in regionality.
Content two: adjustment tunnel axial direction (preferably consistent with the direction of horizontal stress).Research shows, the distortion of tunnel roof and floor and stability are mainly by the impact of horizontal stress.When tunnel, axis is parallel with maximum horizontal principal stress, and tunnel is minimum by the impact of horizontal stress, is conducive to roof and floor and stablizes; When tunnel, axis is vertical with maximum horizontal principal stress, and tunnel is by the having the greatest impact of horizontal stress, and Roof And Floor Stability is the poorest, is more unfavorable for crossheading top, the forfending of base plate dynamic disaster; When both are in a certain angle, side, tunnel there will be horizontal stress and concentrates, and it is a gang of that the distortion and fragmentation of roof and floor can be partial to certain of tunnel, roof and floor side will be caused higher than opposite side, and comparatively opposite side is broken.Under maximum horizontal stress effect, can there is shear failure in adjoining rock, occurs loosening and the changing of the relative positions, causes rock stratum to be expanded, is out of shape.The effect of anchor pole be suppress rock stratum along bolt shaft to expansion and the shearing changing of the relative positions perpendicular to axial direction.
Content three: adjustment section coal pillar stays establishes mode.Section coal pillar refers to and moves towards to stay the protection coal pillar established between coal wall, and Main Function is isolation goaf.Section coal pillar width decides the position of subsequent work face gob side entry, coal pillar width is different, ore deposit pressure impact suffered by gob side entry is different, generally will avoid adopting bearing pressure peak action scope as determining gob side entry position or section coal pillar width Main Basis.
In described content one, the regionality that the mitigation of dynamic impact disaster tunnel is arranged forfends thought mainly to dodge, and prevention is auxiliary, reasonably dodges and can reduce most of preventive works amount and spending.Measure is mainly to adjust roadway layout position (namely adjustment section coal pillar stays and sets mode) and adjustment tunnel axial direction (namely as far as possible consistent with horizontal stress direction).
In described content two, the prerequisite of adjustment tunnel axial direction has been geostatic stress in-situ test work (generally using stress relief method) in representative measuring point tunnel, grasp the directional spreding characteristic sum geostatic stress magnitude of horizontal principal stress (stress field is generally based on horizontal stress), and understand surrounding area, field with "nine squares" tectonic stress field feature, drift section distortion deflection and destruction shear performance under surge well, comprehensive verification detecting earth stress result.Adjust the arranged direction of mining roadway according to horizontal tectonics geostatic stress distribution arrangement, tunnel axial direction should be arranged consistent with orientation of principal stress by best mode.
In described content three, adjustment section coal pillar stays establishes mode." dynamic disaster mine safety mining temporary provisions " specify: roadway layout should adopt without coal column or little (narrow) coal column mode, if during necessary reserved coal pillar, coal column shape should be regular, must not leave acute angle.Stope drift active workings should avoid bearing pressure influence basin as far as possible, do not allow two lanes parallel driving simultaneously.Goaf side breaks rule, lateral stress distribution deeply to old bursting, digs lane technology more ripe at present along empty (thin coal pillar).Based on this, carry out the research of dynamic impact disaster mine layout of actual mining roadway, can after upper curtate working face extraction be stable, stay thin coal pillar to tunnel lower curtate miscellaneous function lane along edge, goaf, the stope drift active workings group loss of coal pillar solving dynamic impact disaster mine " U-shaped ventilation system+miscellaneous function lane " form be large, the frequent problem of dynamic impact.
The novel mitigation development method in a kind of tunnel, dynamic disaster mining areas of mine, by field with "nine squares", regional dynamic impact type disaster forfends basis premised on mentality of designing, adopt the exploiting field stope drift active workings group of multiple factors exclusive method to dynamic disaster mine " U-shaped ventilation system+miscellaneous function lane " to analyze in excavation replacement order, digging velocity magnitude and roof movement, comprise following content:
Content one: consider excavation replacement order.Colliery dynamic phenomenon is sharply gathering and release of the coal petrography elastic strain energy caused due to mining work activities (static load is concentrated, and dynamic loading promotes the accumulation of static load), closely related with the factor such as coal rock layer scope, operation intensity of digging operation disturbance.Work plane is once be formed, along with high seam constantly excavates, overlying rock bending-sinking-fracture-slipping will cause the Under Dynamic Load that stope surrounding is strong, after the Stress field overlaping under coal petrography static load, coal seam elastic strain energy gathers higher level, larger to the destructive power in tunnel in dispose procedure, cause calamity stronger.
Under the condition that two lane, side, goaf is arranged, after upper curtate exploitation, gob side entry is by the impact of upper curtate back production roof movement, and on rear side of goaf, side 50 ~ 400m scope dynamic impact disasters danger is very big, roadway deformation amount account for that disturbance total deformation is adopted in whole pick 70% ~ 85%.When two lane driving, development end is too concentrated, and (during " advancing side by side " driving, disturbing influence is the most remarkable) will cause the mutual disturbance of driving stress field, there are two kinds of situations: one is that mining induced stress superposes mutually, static stress level raises, and single entry driving Disturbance stress influence basin is generally generally 3 ~ 5 times of tunnel principal radii; Two be mining work activities for providing dynamic loading each other, country rock dynamic-load stress raises instantaneously, dynamic loading moment influence basin will much larger than single entry driving Disturbance stress sphere of action.So, optimize excavation replacement order very effective for the probability of happening forfending dynamic impact disaster.
Content two: optimize digging speed.The fault offset close relation of digging speed and uniformity and coal and rock, too fast or uneven coal and rock stress and the energy of all can causing of digging speed can not discharge in time and accumulate gradually, until concentrate release with the form of macro-energy shock event after exceeding its strength limit, thus bring out dynamic impact phenomenon.Combine ore drawing well hazard management situation according to other dynamic impact type disaster of the whole nation, suggestion fltting speed is no more than 4-7m/d and is advisable.
Content three: utilize the roof movement time.Along the goaf side of different distance in empty coal column to abutment pressure distribution, there is larger difference and relevant with the time.At rear, goaf, side direction hangs the high-order top board existence rotary deformation active stage in various degree of dew, and this cycle has timeliness.Along with the lasting propelling of upper curtate work plane, the high-order roof movement degree of the outstanding dew of side direction weakens gradually.Therefore, in developing gob side entry, select rational driving time and position driving to be of value to roadway maintenance, be more conducive to forfending dynamic impact disaster and occur.
Content four: strengthen tunnel supporting intensity in driving.The impact failure of dynamic impact disaster mine laneway often has flash disruption, after roadway opening is optimized, dynamic impact manifests intensity will be reduced greatly, but it is relatively poor along empty (thin coal pillar) tunnel integrality, using and needing to strengthen in tunneling the supporting intensity of this scope, guarantee period tunnel uses and rock integrity in tunneling and stiffness by itself, preferably adopts " U-shaped steel+anchor pole (rope)+wire lath+steel bar ladder beam (or W-shaped steel band) " to form compound tunneling boring support form.
Controlled (tune) that in field with "nine squares", regional dynamic impact disaster forfends is on the basis that the sub-Factor Selection of calamity has designed, utilize goaf distribution of abutment pressure, novel " U-shaped ventilation system+miscellaneous function lane " that the present invention proposes the tunnel mitigation of a kind of dynamic disaster mining areas of mine is arranged and development method (see Fig. 1).Technical scheme is:
Upper curtate and this section work plane adopt order mining to arrange.The sluicing function lane, outer ring (tunnel 1) of upper curtate work plane is arranged in tailgate (tunnel 3) side, wide coal column (A coal column) is adopted to protect lane, be used as upper curtate sluicing (grouting of holding concurrently) function lane to use, any function lane is no longer arranged in haulage way (tunnel 2) side, after upper curtate working face mining terminates, ((tunnel 1) does tailgate (tunnel 6) use of this section work plane, plays the function that a lane is dual-purpose in upper curtate sluicing function lane.After upper curtate work plane overburden of the goaf motion stabilization, stay along edge, upper curtate goaf in A coal column and establish thin coal pillar, and tunnel this section work plane outer ring sluicing function lane (tunnel 8).Upper curtate and this section gas suction road are arranged in above two tailentry sides, and flat apart from keeping equal apart from tailgate.
In roadway opening mode, tunnel the large lane work of the large lane of exploiting field (panel) conveyer, Fu Yun great lane, exploiting field and exploiting field return air first respectively, then arrange Mining Area stope drift active workings.In roadway workface driving, first tunnel upper curtate haulage way (tunnel 2) and tailgate (tunnel 3) and gas suction road, tunnel, tunnel 23 can be tunneled simultaneously; Tunnel the upper curtate sluicing gallery (tunnel 1) of this section inner ring and this section haulage way (tunnel 7) and gas suction road again, tunnel 1 and tunnel 7 can be tunneled simultaneously; After upper curtate working face mining terminates, a period of time (at least 15 days) tunnels this section sluicing gallery (tunnel 8) again.
Specifically, method step comprises following:
Step one: at analysis power under the prerequisite of the sub-factor of calamity controllable, complete the work of mining roadway geostatic stress in-situ test, grasp the directional spreding characteristic sum geostatic stress magnitude of horizontal principal stress, adjust the arranged direction of mining roadway according to horizontal tectonics geostatic stress distribution arrangement, best mode should be as far as possible consistent with orientation of principal stress by tunnel axial direction;
Step 2: after the general direction adjustment that mining roadway is arranged terminates, start to arrange Mining Area, upper curtate and this section work plane adopt order mining to arrange;
Step 3: the sluicing function lane, outer ring (tunnel 1) of upper curtate work plane is arranged in tailgate (tunnel 3) side, wide coal column (A coal column) is adopted to protect lane, be used as upper curtate sluicing (grouting of holding concurrently) function lane to use, any function lane is no longer arranged in haulage way (tunnel 2) side;
Step 4: after upper curtate working face mining terminates, ((tunnel 1) does tailgate (tunnel 6) use of this section work plane, plays the function that a lane is dual-purpose in upper curtate sluicing function lane;
Step 5: after the motion of upper curtate work plane overburden of the goaf is fully stable, stay along edge, upper curtate goaf in A coal column and establish thin coal pillar (staying of thin coal pillar establishes width range generally at 3 ~ 7m), and tunnel this section work plane outer ring sluicing function lane (tunnel 8);
Step 6: upper curtate and this section gas suction road are arranged in above two tailentry sides, and keep equal (flat distance should be consistent with both sides Fractured zone width, and height is consistent with caving zone height) apart from the flat distance between tailgate.
The upper curtate outer ring sluicing function lane (tunnel 1) arranged, when being used as upper curtate sluicing (grouting of holding concurrently) function and using, can use as the tailgate of this section work plane (tunnel 6) simultaneously, play the function in 1 lane 3;
Stay along edge, upper curtate goaf the sluicing lane, this section work plane outer ring (tunnel 8) of establishing thin coal pillar to tunnel to use as this section grouting function simultaneously, play the function that a lane is dual-purpose.
Fig. 2 represents that goaf side is to abutment pressure distribution figure.Maturation that is theoretical based on gob side entry driving and technology develops, after upper curtate is adopted, top board bending subsidence, bearing pressure are in the transfer process of side, and edge coal body pressurized is cut, there is certain plastic failure area, in coal body edge, goaf certain limit, forms stress relaxed area.Therefore, utilize this principle to tunnel a work plane outer ring sluicing function lane (tunnel 8) (gob side entry driving) for this section and create advantage.
After in figure, curve a represents upper curtate working face extraction, the abutment pressure distribution curve that stress develops to this section side.After the stabilization by compaction of upper curtate goaf, adopt and stay thin coal pillar mode along stress relaxed area (depressor area) gob side entry driving; After curve b represents this section exploitation, the lateral-supporting pressure curve that after this section lateral-supporting pressure distribution and upper curtate lateral-supporting pressure superposition, upper curtate redistributes; After curve c represents this section exploitation, the abutment pressure distribution curve that stress develops to upper curtate side.Still protect lane for wide coal column during this section working face extraction, gob side entry, because adopting bearing pressure impact away from this section work plane, is still in lower ambient stress; Tunnel 8 is also in up the stress relaxed area (curve b) of section superposition bearing pressure simultaneously.Therefore, tunnel, this section work plane outer ring is in the relatively low ambient stress of a stress all the time from digging to discard, and avoids tunnel to stand the strong mining influence of secondary, can save utilization, it also avoid roadway maintenance dynamics simultaneously.
See Fig. 3, by field with "nine squares", regional dynamic impact type disaster forfends basis premised on mentality of designing, and the mining roadway developing of dynamic disaster mine " U-shaped ventilation system+miscellaneous function lane " should be based upon on the basis of consideration excavation replacement order, roof movement, digging velocity magnitude.Novel " U-shaped ventilation system+miscellaneous function lane " expanding design of dynamic disaster mining areas of mine tunnel mitigation and a principle flow chart, comprise the following steps:
Step one: the upper curtate of mining roadway development layout and this section and the developing of lower curtate work plane employing order, be disposed in order;
Step 2: in the large lane developing of an exploiting field (panel), the large lane work of the large lane of exploiting field conveyer, Fu Yun great lane, exploiting field and exploiting field return air should be tunneled respectively, note tunneling sequence, avoid synchronous driving simultaneously, control driving speed well, arrange driving operation and teams and groups properly, ensure the uniformity of driving speed;
Step 3: developing Mining Area stope drift active workings.First tunnel upper curtate haulage way (tunnel 2) and tailgate (tunnel 3) and gas suction road, tunnel, tunnel 23 can be tunneled simultaneously;
Step 4: driving this section tailgate (being also simultaneously upper curtate sluicing gallery (tunnel 1)) and this section haulage way (tunnel 7) and gas suction road, tunnel 1 and tunnel 7 can be tunneled simultaneously;
Step 5: after upper curtate working face mining terminates a period of time (at least 15 days) again along upper curtate goaf side to bearing pressure reduce district tunnel this section sluicing gallery (tunnel 8).
In section road driving, the special supporting intensity strengthened along empty (thin coal pillar) tunnel (this section sluicing gallery (tunnel 8)), guarantee period tunnel uses and rock integrity in tunneling and stiffness by itself, preferably adopts " U-shaped steel+anchor pole (rope)+wire lath+steel bar ladder beam (or W-shaped steel band) " to form compound tunneling boring support form.
After above step completes, 2 sections (work plane) can be formed, complete the developing task in " 5+2 " totally 7 tunnels, decrease 2 tunnels than traditional arrangement.
Fig. 4 represents " U " type ventilation system+miscellaneous function lane of power to evil mine " roadway group layout schematic diagram (mine motive force danger of burst grade is represented by red in figure, yellow and blueness to general respectively by height, moderate; generally, all can be considered general or moderate risk district in lead abutment pressure influence basin).
The upper curtate air circuit of " U " type ventilation system is that conveyer large lane-tunnel 2-upper curtate in panel cuts eye-large lane of return air, 3-panel, tunnel, tunnel 1 realizes upper curtate work plane water drainage function, tunnel 4 realizes upper curtate work plane exploiting field district fire-extinguishing function concurrently, top, coal seam allocates apart from arranging a high-order gas lane, for upper curtate goaf and corner gas drainage under suction function near return airway one.
This section air circuit of " U " type ventilation system is that conveyer large lane-tunnel 7-this section in panel cuts eye-large lane of return air, 6-panel, tunnel, tunnel 5 can realize this section water drainage function, the close this section transportation roadway of script routinely thinking will design grouting lane, this section goaf, but due to upper curtate exploitation lateral-supporting pressure influence, most of scope in tunnel 5 is damaged by the high strength dynamic impact disaster district of the square one-tenth of rear side.Therefore, the grouting works in this work plane goaf is scraped upper curtate sluicing lane and is constructed, and no longer sets up lane of being in the milk specially.Upper high-order gas lane, coal seam is used for the extraction function of this section goaf and corner gas.
Tradition mining roadway system looks that very wadding is random and numerous and diverse, there is the framework of round Realization water, fire, comprehensive gas prevention function, but have ignored this first evil of dynamic impact disaster, very frequent at exploitation medium power impact phenomenon, have a strong impact on face of adopting and advance quality and life safety, this kind of arrangement is extremely unreasonable.
Compared with existing roadway layout and development method, the present invention has following beneficial effect:
(1) novel " U-shaped ventilation system+miscellaneous function lane " method for arranging of a kind of dynamic disaster mining areas of mine tunnel mitigation science, rationally in regional mentality of designing and mitigation prevention and controls, coal damage amount can be reduced, save tunnel mitigation and maintenance cost, improve the safety in producing, there is actual reference value.
(2) in tunnelling, roadway layout method of the present invention makes roadway workface focus utilization rate high, tunnel is arranged in upper and lower two work plane zone lines (comprising coal column) cleverly, on the basis meeting ventilation condition, the development engineering amount at least 2 function lanes can be cut down, save at least 20m loss of coal pillar, serve reduction develop cost, improve the effect of the rate of extraction.
(3) under adjusting the prerequisite of tunnel axial direction, the probability of happening of dynamic impact disaster is weakened from root, consider again the improvement of goaf top plate water, coal spontaneous combustion and gas simultaneously, the reasonable science of roadway layout, solves dynamic impact disaster mine " many disaster source " and may derive a difficult problem for disaster-ridden evil.
(4) make upper curtate assist sluicing function lane (this section tailgate) away from upper curtate work plane, avoid mining induced stress impact.Meanwhile, this section assists sluicing function lane (grouting of holding concurrently) lane to be arranged in upper curtate goaf side and to reduce in district to bearing pressure, again away from this section mining influence, makes the stability in two tunnels all secure.
(5) roadway opening mentality of designing and methodological science reasonable, from optimization driving and the controlled temper factor of tunnel disaster such as mining sequence, roof movement time, complementary has coordinated the method for arranging in novel " U-shaped ventilation system+miscellaneous function lane ", greatly reduces disaster odds.
Claims (10)
1. the development method in tunnel, a dynamic disaster mining areas of mine, it is characterized in that: first digging upper curtate work plane, the work plane of digging this section again, wide coal column is reserved between upper curtate work plane and this section work plane, finally digging this section sluicing gallery between wide coal column, be thin coal pillar between described this section sluicing gallery and upper curtate work plane, finally strengthen the supporting intensity of this section sluicing gallery.
2. the development method in tunnel, a kind of dynamic disaster mining areas of mine according to claim 1, is characterized in that: the tunnel that described upper curtate work plane is adjacent with coal column is return airway, and parallel with return airway is transportation roadway; The tunnel that described this section is adjacent with coal column is multifunctional tunnel, doublely does this section return aircourse and upper curtate sluicing tunnel, and the another side parallel with multifunctional tunnel is this section haulage drift.
3. the development method in tunnel, a kind of dynamic disaster mining areas of mine according to claim 2, is characterized in that: the return airway of described upper curtate and transportation roadway digging simultaneously.
4. the development method in tunnel, a kind of dynamic disaster mining areas of mine according to claim 2, is characterized in that: the return airway of described this section and transportation roadway digging simultaneously.
5. the development method in tunnel, a kind of dynamic disaster mining areas of mine according to claim 1, is characterized in that: the axial direction in tunnel is consistent with the direction of maximum horizontal stress of mine.
6. the development method in tunnel, a kind of dynamic disaster mining areas of mine according to claim 1, is characterized in that: after upper curtate working face extraction is stable, then stays thin coal pillar to tunnel lower curtate miscellaneous function lane along edge, goaf.
7. the development method in tunnel, a kind of dynamic disaster mining areas of mine according to claim 1, is characterized in that: the supporting of described this section sluicing gallery adopts " U-shaped steel+anchor pole or anchor cable+wire lath+steel bar ladder beam or W-shaped steel band " forms compound tunneling boring support form.
8. the development method in tunnel, a kind of dynamic disaster mining areas of mine as claimed in any of claims 1 to 7, it is characterized in that: digging speed is 4-7m/d, drawing speed is 3-5m/d.
9. a dynamic disaster mining areas of mine tunnel structure, it is characterized in that: between upper curtate work plane and this section work plane, be reserved with wide coal column, between wide coal column, digging has this section sluicing gallery, distance between this section sluicing gallery and upper curtate work plane is thin coal pillar, what this section was adjacent with wide coal column is multi-functional gallery, doublely does this section return airway and upper curtate sluicing lane, and multi-functional gallery opposite side is transportation roadway, what upper curtate was adjacent with thin coal pillar is return airway, and opposite side is transportation roadway.
10. a kind of dynamic disaster mining areas of mine according to claim 9 tunnel structure, is characterized in that: described upper curtate and this section gas suction road are arranged in above two tailentry sides, and flat apart from keeping equal apart from tailgate.
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| CN201510387130.XA CN105156110A (en) | 2015-07-03 | 2015-07-03 | Dynamic disaster mine district roadway structure and method for developing same |
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| CN107701188A (en) * | 2017-10-25 | 2018-02-16 | 太原理工大学 | One kind cuts top destressing method for the mined out side static state spalling of gob side entry driving thin coal pillar |
| CN108590656A (en) * | 2018-04-02 | 2018-09-28 | 西安科技大学 | A kind of disaster-ridden member coupling hard-to-recovery reserve decoupling recovery method |
| CN108843319A (en) * | 2018-07-04 | 2018-11-20 | 长沙矿山研究院有限责任公司 | The forming method of deep Development system |
| CN108952717A (en) * | 2018-07-04 | 2018-12-07 | 天地科技股份有限公司 | For close-in seams exploitation lower coal seam thin coal pillar along the lane Kong Hu method |
| CN109025995A (en) * | 2018-09-03 | 2018-12-18 | 中国矿业大学(北京) | A kind of underground coal mass strength penetration test device and method |
| CN110886611A (en) * | 2019-12-06 | 2020-03-17 | 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 |
| CN115839249A (en) * | 2023-01-16 | 2023-03-24 | 煤炭科学技术研究院有限公司 | Method for arranging ultra-long working face double-measure roadway under sequential mining condition |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701188A (en) * | 2017-10-25 | 2018-02-16 | 太原理工大学 | One kind cuts top destressing method for the mined out side static state spalling of gob side entry driving thin coal pillar |
| CN107701188B (en) * | 2017-10-25 | 2019-02-26 | 太原理工大学 | One kind cutting top destressing method for the mined out side static state spalling of gob side entry driving thin coal pillar |
| CN108590656A (en) * | 2018-04-02 | 2018-09-28 | 西安科技大学 | A kind of disaster-ridden member coupling hard-to-recovery reserve decoupling recovery method |
| CN108590656B (en) * | 2018-04-02 | 2019-10-01 | 西安科技大学 | A kind of disaster-ridden member coupling hard-to-recovery reserve decoupling recovery method |
| CN108843319A (en) * | 2018-07-04 | 2018-11-20 | 长沙矿山研究院有限责任公司 | The forming method of deep Development system |
| CN108952717A (en) * | 2018-07-04 | 2018-12-07 | 天地科技股份有限公司 | For close-in seams exploitation lower coal seam thin coal pillar along the lane Kong Hu method |
| CN108952717B (en) * | 2018-07-04 | 2020-06-09 | 天地科技股份有限公司 | Lower coal seam narrow coal pillar gob-side entry protection method for short-distance coal seam mining |
| CN109025995A (en) * | 2018-09-03 | 2018-12-18 | 中国矿业大学(北京) | A kind of underground coal mass strength penetration test device and method |
| CN110886611A (en) * | 2019-12-06 | 2020-03-17 | 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 |
| 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 |
| CN115839249A (en) * | 2023-01-16 | 2023-03-24 | 煤炭科学技术研究院有限公司 | Method for arranging ultra-long working face double-measure roadway under sequential mining condition |
| CN115839249B (en) * | 2023-01-16 | 2023-04-18 | 煤炭科学技术研究院有限公司 | Method for arranging ultra-long working face double-measure roadway under sequential mining condition |
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