CN110145363A - A kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition - Google Patents
A kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition Download PDFInfo
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- CN110145363A CN110145363A CN201910359930.9A CN201910359930A CN110145363A CN 110145363 A CN110145363 A CN 110145363A CN 201910359930 A CN201910359930 A CN 201910359930A CN 110145363 A CN110145363 A CN 110145363A
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- 239000003245 coal Substances 0.000 title claims abstract description 58
- 238000005065 mining Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000007704 transition Effects 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 230000003014 reinforcing effect Effects 0.000 claims description 23
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- 238000009434 installation Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000003319 supportive effect Effects 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
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- 238000003776 cleavage reaction Methods 0.000 claims 1
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- 239000006185 dispersion Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
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- 208000019901 Anxiety disease Diseases 0.000 description 4
- 230000036506 anxiety Effects 0.000 description 4
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- 230000008901 benefit Effects 0.000 description 2
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- 230000004888 barrier function Effects 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/06—Filling-up mechanically
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
The present invention provides a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition, along fully-mechanized mining working direction of extraction, sets gradually initial high-strength control zone and connects firm Support；Initial high-strength control zone selection is controlled under base object model break, main anchor pole rope support system, the pin net retaining system after bracket and the narrow obturation support system of continuous constraint including before bracket；Anchor pole rope support system carries out the construction of anchor pole rope between bracket and coal wall before bracket, and the control of top plate globality is completed before entering goaf；The narrow obturation support system of continuous constraint often cuts a knife in working face and carries out high dense fill, and forms integrated support to narrow obturation progress continuous constraint later with anchor cable lateral confinement；It connects firm Support to be made of Bolt System and the narrow supporting filling body system of high concentration, normal filling mining is carried out using normal concentration filler and wide filling bag later.
Description
Technical field
The present invention provides a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition, is related to underground coal
Resource exploitation scope is particularly suitable for the presence of dispersion group's village buildings pressure coal situation on overlength fully mechanized coal face.
Background technique
In recent years, with the continuous development of fully-mechanized mining and perfect, China's fully-mechanized mining working development layout length
It is increasingly longer, there is the single fully-mechanized mining working of part mine that length is promoted to have reached 4km, so promotes the working face of length inevitable
Ground dispersion group's village buildings pressure coal problem is faced, also necessarily the regular arrangement of fully-mechanized mining working is had an impact.Needle
Cut and fill is used to coal seam in dispersion group's village buildings pressure coal region, disperses group using filling mining technical controlling
Village buildings press the subsidence in coal region, protect its ecological environment；Disperse coal seam outside group's village buildings pressure coal region
It is exploited using caving method, reduces production cost.Existing fully-mechanized mining equipment is built upon on the basis of caving method exploitation, and cut and fill needs
Filling mining equipment is specially purchased, and replaces stowage unit in underground, there are complicated construction techniques, cost of investment height, work
The outstanding problems such as anxiety are taken over as face.Thus, it would be highly desirable to explore a kind of be able to achieve on existing fully-mechanized mining equipment and fully mechanized mining technology and collapse
Fall the recovery method that method exploitation is freely converted with cut and fill.
Summary of the invention
The object of the invention is to there is dispersion group's village buildings pressure to solve above-mentioned be directed on overlength fully mechanized coal face
Coal problem, at the same need using cut and fill system and across occur when falling method mining system economy, technology the problems such as, provide
A kind of technically simple possible, economic benefit are prominent and practical caving method exploitation and filling are realized in recovery process
Method exploits the recovery method freely converted.This method, which can be effectively directed on overlength fully mechanized coal face, has dispersion group's village buildings pressure
Coal problem, it can be achieved that caving method exploitation cut and fill system between freely change, can solve and applied existing for traditional treatment method
The outstanding problems such as work process complications, cost of investment are high, working efficiency is low, deficiency in economic performance, face take-over anxiety.
Above-mentioned purpose to realize the present invention, the present invention provide a kind of top realized fully mechanized coal face and be caving filling mining transition
Plate control method sets gradually initial high-strength control zone and connects firm Support along fully-mechanized mining working direction of extraction；It is initial high
Strong control zone selection is controlled under base object model break, the main anchor pole rope support system including before bracket, after bracket
Pin net retaining system and the narrow obturation support system of continuous constraint；Anchor pole rope support system is i.e. between bracket and coal wall before bracket
The construction of anchor pole rope is carried out, the control of top plate globality is completed before entering goaf；The narrow obturation support system of continuous constraint is in work
Make face and often cut a knife to carry out high dense fill, and with anchor cable lateral confinement, continuous constraint, shape are carried out to narrow obturation later
Integral support；It connects firm Support to be made of Bolt System and the narrow supporting filling body system of high concentration, use later
Normal concentration filler and wide filling bag carry out normal filling mining.
The initial high-strength control zone, which is in, is caving filling transition initial stage, can be according to working face digging working condition and mine
Press its command range of law formulationWFor 4.8 ~ 9.6m, that is, include 2 ~ 4 groups of narrow obturations of continuous constraint, is undergoing initial high-strength control
After rear top plate is adopted in strength supporting in area's processed, stability of cavern roof can be tentatively realized, and connect firm Support creation supporting environment to be subsequent；
The firm Support of connecting is arranged in after the initial high-strength control zone, and roof pressure has tended to steady during supporting
It is fixed, can according to initial high-strength control zone stability of cavern roof situation and combine roof pressure measurement situation formulate connect firm Support away from
FromVFor 2.4 ~ 8m.
The pressure-bearing supportive body of the initial high-strength control zone is the narrow obturation support system of continuous constraint, it is described it is continuous about
The narrow obturation support system of beam is made of the long narrow cube filling bag of high dense fill material, preformed hole, anchor cable and pallet, be
After fully-mechanized mining working promotes, filling immediately is carried out in delay filling operation of following up in time, realizes that single high dense fill length is equal to
Working face often cuts the length of a knife；The placement tray in the long narrow cube filling bag two sides tray bag of preformed hole, by high dense fill
Material is injected into preformed hole long narrow cube filling bag, forms the narrow obturation of single high concentration, is reserved hole site at it and is added and wears two
Row or multiple rows of lateral anchor cable, while anchor cable passes through two sides pallet, applies pretightning force later and is constrained for the first time, is formed initial single
Constrain narrow obturation；As working face continues to promote, the newly-increased narrow obturation of single high concentration, which adds, to be through on lateral anchor cable, one side
Against initial single narrow obturation of constraint, the other side adds pallet to apply pretightning force, is constrained immediately；As working face continuously pushes away
Into the newly-increased narrow obturation of single high concentration such as wears " string " shape, successively plus is through on whole lateral anchor cable, high to each newly-increased single
The narrow obturation of concentration is pre-tightened immediately, is constrained immediately, can be configured to by two or more narrow obturations of single high concentration
The narrow obturation of continuous constraint；In entire building process, inside the narrow obturation of continuous constraint plus high-strength high pre-stress anchor cable and outer is worn
Side pallet enhances its confining pressure, in space large deformation after adopting, can increase its bearing capacity, anti-shearing and non-deformability,
It can strongly support and adopt rear top plate.
The pin net retaining system of the initial high-strength control zone is by being caving spoil side arrangement, the pin net supporting and retaining system system
System is combined by wooden prop and flexible metal net to be formed, and is laid with flexible metal net in advance in roof of coal face, i.e., from hydraulic branch
Start lapping before frame, as hydraulic support promotes, it is 1 ~ 3m, goaf side that flexible metal net embedment goaf, which is caving spoil length,
Linked network length is that mining height and flexible metal net are embedded to the sum of mined out section length, mined out after hydraulic support collateral to set wooden prop strength
Roof supporting can give full play to flexible metal net expansion performance by wooden prop as flexible metal net bracket, obstruct goaf
It is caving spoil and scurries into and adopt rear space, realize interim supporting and retaining system, be subsequent timely filling preparation work space.
The top plate of the initial high-strength control zone is reinforced using anchor pole rope support system, the anchor pole rope support system
It is combined and is formed by anchor pole, anchor cable, flexible metal net, pallet and reinforcing bar ladder beam, opened between hydraulic support and entity coal wall
Begin to construct, the construction and installation anchor pole rope on the direction of multiple operation face, using reinforcing bar ladder beam as anchor pole rope supporting connector, later
Add pallet and applies pretightning force；Anchor cable and anchor pole are anchored at base object model and directly top respectively, and anchorage cable anchoring is in roof strata deep
Anchoring stability region is created for suspension roof support, reinforcing bar ladder beam connects more anchor pole ropes, and fastens flexible metal net and be adjacent to
Top plate surface layer, makes prestressing force field be deep into roof strata deep by roof strata superficial part, and energy integral reinforcing top plate is mined out entering
Qu Hou, top plate still can guarantee completely, create good top plate environment for subsequent packing job.
The firm Support top plate of connecting is reinforced using Bolt System, and the Bolt System is by anchor
Bar, flexible metal net, pallet and reinforcing bar ladder beam combine to be formed, and start to construct between hydraulic support and entity coal wall,
Construction and installation anchor pole on the direction of multiple operation face later plus pallet and applies using reinforcing bar ladder beam as suspension roof support connector
Pretightning force, integral reinforcing top plate；The firm Support pressure-bearing supporting main body of connecting is the narrow supporting filling body system of high concentration, institute
It states the narrow supporting filling body system of high concentration to be combined and formed by high dense fill material, long narrow cube filling bag, by high dense fill
Material injects long narrow cube and fills bag, condenses into the narrow obturation support of high concentration and adopts rear top plate, by observing and surveying top plate pressure
After force value tends towards stability, terminate to connect firm Support, starts to carry out using normal concentration filler and wide filling bag normal
Filling mining.
The narrow obturation of continuous constraint adds and wears anchor cable concentration and adding and wear single constraint obturation number and practical prop up
Shield mode, the distance of face roof under control are related from, mining height and anti-shearing resistance to deformation.
The utility model has the advantages that the present invention provides a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition, adopt
When can solve the problems, such as to have dispersion group's village buildings pressure coal on overlength fully mechanized coal face with the present invention, caving method production zone is realized
Cut and fill region is transitted directly to, and realizes and freely changes between caving method exploitation and cut and fill system, is set without staying
Protection coal pillar arranges filling operation face without open-off cut again, saves face moving, and face take-over anxiety is effectively relieved,
Work efficiency is high, resource recovery is high, good in economic efficiency, has extensive and important practical value.
Detailed description of the invention
Fig. 1 is a kind of implementation structural schematic diagram realized fully mechanized coal face and be caving the Roof Control method of filling mining transition
One.
Fig. 2 is a kind of implementation structural schematic diagram realized fully mechanized coal face and be caving the Roof Control method of filling mining transition
Two.
Fig. 3 is a kind of implementation structural schematic diagram realized fully mechanized coal face and be caving the Roof Control method of filling mining transition
Three.
Fig. 4 is a kind of implementation structural schematic diagram realized fully mechanized coal face and be caving the Roof Control method of filling mining transition
Four.
Fig. 5 is 1-1 sectional view in Fig. 1.
Fig. 6 is 2-2 sectional view in Fig. 2.
Fig. 7 is 3-3 sectional view in Fig. 3.
Fig. 8 is 4-4 sectional view in Fig. 4.
Fig. 9 is reinforcing bar ladder beam schematic diagram.
Figure 10 is pallet schematic diagram.
Figure 11 is the fully-mechanized mining working exploitation schematic diagram for dispersing group's village buildings pressure coal.
Figure 12 is the partial enlarged view of anchor pole rope support system.
Figure 13 is the partial enlarged view of Bolt System.
The reference numerals are as follows: 1, initial high-strength control zone；2, firm Support is connected；3, pin net retaining system；
3-1, wooden prop；3-2, flexible metal net；3-3, individual prop；3-4, interim individual prop；4, anchor pole rope support system；4-1,
Anchor pole；4-2, anchor cable；4-3, pallet；4-4, reinforcing bar ladder beam；5, the narrow obturation support system of continuous constraint；5a, single are highly concentrated
Spend narrow obturation；The narrow obturation of 5b, continuous constraint；5-1, high dense fill material；The long narrow cube of 5-2, preformed hole fills bag；5-
3, anchor cable；5-4, pallet；5a, the narrow obturation of single high concentration；The narrow obturation of 5b, continuous constraint；6, Bolt System；6-1,
Anchor pole；6-2, pallet；6-3, reinforcing bar ladder beam；7, the narrow supporting filling body system of high concentration；7-1, long narrow cube fill bag；7-2,
The narrow obturation of high concentration；8, hydraulic support；9, coalcutter；10, drag conveyor；11, entity coal wall；12, goaf；12-1,
Goaf is caving spoil；13, fully-mechanized mining working；14, top plate；14-1, it directly pushes up；14-2, base object model；15, normal filling mining；
16, caving method production zone；17, cut and fill region；18, group's village buildings.
Specific embodiment
The above problem to realize the present invention, the present invention provide a kind of top realized fully mechanized coal face and be caving filling mining transition
Plate control method.
Embodiment
If 13 total length of single fully-mechanized mining working of Fig. 1 ~ 4,11, a coal mine reaches 2.4km, in face advanced distance
There are problems that dispersing group's village buildings 18 presses coal, proposes to dispersion group in 0.8 ~ 1.1km, the two sections of regions 1.6 ~ 1.9km
Village buildings press coal seam in 18 region of coal to use cut and fill, form cut and fill region 17, protect its ecological environment；
Coal seam outside dispersion group's village buildings pressure coal region is exploited using caving method, caving method production zone 16 is formed, to reduce
Production cost is used caving method exploitation face length for 0 ~ 0.8km, 1.1 ~ 1.6km, 1.9 ~ 2.4km, is opened using filling method
Mining face length is 0.8 ~ 1.1km, two sections of 1.6 ~ 1.9km, comprehensively considers existing fully-mechanized mining equipment and is built upon caving method exploitation
On the basis of, if needing specially to purchase filling mining equipment using cut and fill, initial investment is high, and stowage unit utilizes
Rate is low, in order to reduce cost, alleviates face take-over anxiety, and realization is caving filling and freely converts, and provides one using the present invention
Kind realizes that fully mechanized coal face is caving the Roof Control method of filling mining transition, method particularly includes: in the fully mechanized mining work that overall length is 2.4km
Make face 13, equitable subsection exploitation is carried out using caving method and filling method, after first exploiting 0 ~ 0.8km using caving method, to dispersion group
Coal seam in village buildings pressure coal region is fallen to be caving at filling transition boundary, opening using 0.8 ~ 1.1km of cut and fill
The initial high-strength control zone 1 of the arrangement that begins and the firm Support 2 of connecting, i.e., controlled in the case where base object model is broken A block；Initial high-strength control
Area 1 processed is mainly including pin net retaining system 3 and the narrow obturation support system of continuous constraint after anchor pole rope supporting 4, frame before bracket
5；Connecting firm Support 2 mainly includes that Bolt System 6 and the narrow supporting filling body system 7 of high concentration form.
Such as Fig. 5, firstly, arrangement pin net retaining system 3 is described in the initial high-strength control zone 1 by being caving spoil side
Pin net retaining system 3 is combined and is formed by wooden prop 3-1 and flexible metal net 3-2, is laid in advance in roof of coal face soft
Property metal mesh 3-2, i.e., before hydraulic support 8 lapping, with hydraulic support 8 promote, flexible metal net 3-2 be embedded to goaf
Being caving spoil 12-1 length is 2m, goaf side hanging net length be mining height and flexible metal net 3-2 be embedded to 12 length of goaf it
With install interim individual prop 3-4 after hydraulic support 8, collateral setting wooden prop 3-1 strength roof supporting close to mined out later
14, wooden prop 3-1 array pitch interval 0.5m can give full play to flexible gold by wooden prop 3-1 as flexible metal net 3-2 bracket
Belong to net 3-2 expansion performance, barrier goaf, which is caving spoil 12-1 and scurries into, adopts rear space, realizes interim supporting and retaining system, fills in time to be subsequent
Fill out preparation work space.
Such as Fig. 6,9,10, secondly, the roof strata of the initial high-strength control zone 1 is using the progress of anchor pole rope support system 4
It reinforces, the anchor pole rope support system 4 is combined and is formed by anchor pole 4-1, anchor cable 4-2, pallet 4-3 and reinforcing bar ladder beam 4-4,
Start to construct between hydraulic support 8 and entity coal wall 11, construction and installation anchor pole 4-1, anchor cable 4-2 on the direction of multiple operation face, the
One row installs anchor cable 4-2, it is 75 ° with the angle of horizontal direction that setting angle α, which is 75 °, and anchor pole 4-1 clipping room array pitch is 800
× 800mm, anchor cable 4-2 clipping room array pitch is 1600 × 1600mm, using reinforcing bar ladder beam 4-4 as anchor pole 4-1, anchor cable 4-2 branch
Connector is protected, later plus pallet 4-3 and applies pretightning force；Anchor pole 4-1 and anchor cable 4-2 are anchored at base object model 14-2 and direct respectively
14-1 is pushed up, anchor cable 4-2 is anchored at roof strata deep, creates anchoring stability region, reinforcing bar ladder beam for anchor pole 4-1 supporting
4-4 connects more anchor pole 4-1, anchor cable 4-2, and fastens flexible metal net 3-2 and be adjacent to top plate surface layer, makes prestressing force field by top plate rock
Layer superficial part is deep into roof strata deep, and energy integral reinforcing roof strata, after entering goaf 12, top plate 14 still be can guarantee
Completely, good top plate environment is created for subsequent packing job.
Such as Fig. 6,10, meanwhile, the pressure-bearing supportive body of the initial high-strength control zone 1 is the narrow obturation support of continuous constraint
System 5 is made of the long narrow cube filling bag 5-2 of high dense fill material 5-1, preformed hole, anchor cable 5-3 and pallet 5-4, be
After fully-mechanized mining working promotes, filling immediately is carried out in delay filling operation of following up in time, realizes that single high dense fill length is equal to
Working face often cuts the length of a knife；The placement tray 5-4 in the tray bag of the preformed hole long narrow cube filling two sides bag 5-2, will be high
Concentration filler is injected into the long narrow cube filling bag 5-2 of preformed hole, forms the narrow obturation 5a of single high concentration, reserved at it
Hole site, which adds, wears two rows of or multiple rows of lateral anchor cable 5-3, and anchor cable 5-3 passes through two sides pallet 5-4, applies pretightning force later and carry out just
Secondary constraint forms initial list and constrains narrow obturation 5a；As working face continues to promote, the narrow obturation 5a of single high concentration is increased newly
Add and be through on lateral anchor cable 5-3, one side abuts the initial narrow obturation 5a of single high concentration, and the other side adds pallet 5-4 to apply
Pretightning force is constrained immediately；As working face continuously promotes, the narrow obturation 5a of newly-increased single high concentration such as wears " string " shape,
Successively plus it is through on whole lateral anchor cable 5-4, each narrow obturation 5a of newly-increased single high concentration is pre-tightened immediately respectively,
Immediately constraint, can be configured to the narrow obturation 5b of continuous constraint by the narrow obturation 5a of two or more single high concentrations；Entirely
In building process, inside the narrow obturation 5b of continuous constraint plus high-strength high pre-stress anchor cable 5-3 and outside pallet 5-4 are worn to its confining pressure
Enhancing, in space large deformation after adopting, can increase its bearing capacity, anti-shearing and non-deformability, can strongly support after adopting
Top plate.The narrow obturation 5b of continuous constraint adds to wear anchor cable 5-3 concentration and add and wears single high concentration narrow obturation 5a
It is several with practical support pattern, the distance of face roof under control it is related from, mining height and anti-shearing resistance to deformation.
Such as Fig. 8, the initial high-strength control zone 1, which is in, is caving filling transition initial stage, can produce according to working face digging
Condition and strata pressure laws formulate its command rangeWIt for 9.6m, that is, include the narrow obturation 5b of 4 groups of continuous constraints, it is initial high in experience
After rear top plate is adopted in strong 1 strength supporting of control zone, stability of cavern roof can be tentatively realized, and connect the firm creation of Support 2 branch to be subsequent
Retaining ring border；
The firm Support 2 of connecting is arranged in after the initial high-strength control zone 1, and roof pressure has tended to steady during supporting
It is fixed, according to initial high-strength 1 stable case of control zone top plate and roof pressure measurement situation formulation can be combined to connect firm Support 2
DistanceVFor 8m.
Such as Fig. 7,8,9, firm 2 roof strata of Support of connecting is reinforced using Bolt System 6, the anchor
Bar support system 6 is combined and is formed by anchor pole 6-1, pallet 6-2 and reinforcing bar ladder beam 6-3, in hydraulic support 8 and entity coal wall 11
Between i.e. start to construct, the construction and installation anchor pole 6-1 on the direction of multiple operation face, using reinforcing bar ladder beam 6-3 as anchor pole 6-1 supporting
Connector later plus pallet 6-2 and applies pretightning force, integral reinforcing top plate；It is described to connect firm 2 pressure-bearing supporting main body of Support
For the narrow supporting filling body system 7 of high concentration, the narrow supporting filling body system 7 of high concentration is by high dense fill material 7-1, long narrow
Cube filling bag 7-2 combines to be formed, and high dense fill material 7-1 is injected long narrow cube and fills bag 7-2, it is narrow to condense into high concentration
Rear top plate is adopted in obturation support, after being tended towards stability by observing and survey roof pressure value, is terminated to connect firm Support 2, be opened
Begin to carry out normal filling mining 15 using normal concentration filler and wide filling bag.
If Figure 11 first segment filling total length is 0.3km, that is, 0.8 ~ 1.1km of cut and fill range inner working face is used,
After exploiting 1.1 ~ 1.6km range inner working face using caving method later, to group's village buildings pressure coal problem is encountered again, adopt
It is caving filling with the method for the present invention freely to convert, it is 0.3km that second segment, which fills total length, that is, uses cut and fill
1.6 ~ 1.9km range inner working face has finally exploited remaining 1.9 ~ 2.4km range inner working face using caving method.
Above embodiments are merely to illustrate the present invention, and not limitation of the present invention, all not depart from essence of the invention
It in the case where mind and range, can also make a variety of changes and modification, therefore all equivalent technical solutions also belong to the present invention
Scope.
Claims (7)
1. a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition, it is characterised in that: along fully-mechanized mining working
Direction of extraction sets gradually initial high-strength control zone and connects firm Support；Initial high-strength control zone selection is disconnected in base object model
Controlled under cleavage block, it is main including the anchor pole rope support system before bracket, the pin net retaining system after bracket and it is continuous about
The narrow obturation support system of beam；Anchor pole rope support system carries out the construction of anchor pole rope between bracket and coal wall before bracket, is entering
The control of top plate globality is completed before goaf；The narrow obturation support system of continuous constraint working face often cut a knife carry out it is highly concentrated
Degree filling, and integrated support is formed to narrow obturation progress continuous constraint later with anchor cable lateral confinement；Connect firm branch
Support area is made of Bolt System and the narrow supporting filling body system of high concentration, is filled later using normal concentration filler and width
It fills out bag and carries out normal filling mining.
2. a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition according to claim 1,
Be characterized in that: the initial high-strength control zone, which is in, is caving filling transition initial stage, according to working face digging working condition and mine
Press its command range of law formulationWFor 4.8 ~ 9.6m, that is, include 2 ~ 4 groups of narrow obturations of continuous constraint, is undergoing initial high-strength control
After rear top plate is adopted in strength supporting in area's processed, stability of cavern roof can be tentatively realized, and connect firm Support creation supporting environment to be subsequent；
The firm Support of connecting is arranged in after the initial high-strength control zone, and roof pressure has tended to stable during supporting, according to
According to initial high-strength control zone stability of cavern roof situation and roof pressure measurement situation is combined to formulate the firm Support distance of connectingVFor
2.4~8m。
3. a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition according to claim 2,
Be characterized in that: the pressure-bearing supportive body of the initial high-strength control zone is the narrow obturation support system of continuous constraint, described continuous
It constrains narrow obturation support system to be made of high dense fill material, the long narrow cube filling bag of preformed hole, anchor cable and pallet, is
After fully-mechanized mining working propulsion, delay filling operation of following up in time carries out filling immediately, realizes single high dense fill length etc.
The length of a knife is often cut in working face；The placement tray in the long narrow cube filling bag two sides tray bag of preformed hole, high concentration is filled
Filling chock material is injected into preformed hole long narrow cube filling bag, forms the narrow obturation of single high concentration, is reserved hole site at it and is added and wears
Two rows of or multiple rows of lateral anchor cable, while anchor cable passes through two sides pallet, applies pretightning force later and is constrained for the first time, is formed initial
The narrow obturation of single high concentration；As working face continues to promote, the newly-increased narrow obturation of single high concentration, which adds, to be through on lateral anchor cable,
Against initial single narrow obturation of constraint, the other side adds pallet to apply pretightning force, is constrained immediately for one side；As working face connects
Continuous to promote, the newly-increased narrow obturation of single high concentration such as wears " string " shape, successively plus is through on whole lateral anchor cable, to each newly-increased list
The secondary narrow obturation of high concentration is pre-tightened immediately, is constrained immediately, is built by two or more narrow obturations of single high concentration
For the narrow obturation of continuous constraint；In entire building process, inside the narrow obturation of continuous constraint plus wear high-strength high pre-stress anchor cable and
Outside pallet enhances its confining pressure, in space large deformation after adopting, can increase its bearing capacity, anti-shearing and resistance to deformation energy
Power can be supported strongly and adopt rear top plate.
4. a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition according to claim 3,
Be characterized in that: the narrow obturation of continuous constraint adds to wear anchor cable concentration and add and wears single constraint obturation number and reality
Support pattern, the distance of face roof under control are related from, mining height and anti-shearing resistance to deformation.
5. a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition according to claim 2,
Be characterized in that: the pin net retaining system of the initial high-strength control zone is by being caving spoil side arrangement, the pin net supporting and retaining system
System is combined by wooden prop and flexible metal net and is formed, and is laid with flexible metal net in advance in roof of coal face, i.e., from hydraulic
Start lapping before bracket, as hydraulic support promotes, it is 1 ~ 3m, goaf that flexible metal net embedment goaf, which is caving spoil length,
Side hanging net length is that mining height and flexible metal net are embedded to the sum of mined out section length, and mined out after hydraulic support collateral to set wooden prop strong
Power roof supporting can give full play to flexible metal net expansion performance by wooden prop as flexible metal net bracket, obstruct mined out
Area, which is caving spoil and scurries into, adopts rear space, realizes interim supporting and retaining system, is subsequent timely filling preparation work space.
6. a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition according to claim 2,
Be characterized in that: the top plate of the initial high-strength control zone is reinforced using anchor pole rope support system, the anchor pole rope supporting system
System is combined and is formed by anchor pole, anchor cable, pallet and reinforcing bar ladder beam, starts to construct between hydraulic support and entity coal wall,
Construction and installation anchor pole and anchor cable on the direction of multiple operation face, using reinforcing bar ladder beam as bolt and cable anchor supporting connector, Zhi Houjia
Pallet simultaneously applies pretightning force；Anchor cable and anchor pole are anchored at base object model respectively and directly top, anchorage cable anchoring are in roof strata deep
Suspension roof support creates anchoring stability region, and reinforcing bar ladder beam connects more anchor pole ropes, and fastens flexible metal net and be adjacent to top
Plate surface layer, makes prestressing force field be deep into roof strata deep by roof strata superficial part, and energy integral reinforcing top plate is entering goaf
Afterwards, top plate still can guarantee completely, create good top plate environment for subsequent packing job.
7. a kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition according to claim 2,
Be characterized in that: the firm Support top plate of connecting is reinforced using Bolt System, and the Bolt System is by anchor
Bar, pallet and reinforcing bar ladder beam combine to be formed, and start to construct between hydraulic support and entity coal wall, in multiple operation face side
Upward construction and installation anchor pole later plus pallet and applies pretightning force using reinforcing bar ladder beam as suspension roof support connector, whole to add
Gu top plate；Described connect consolidates Support pressure-bearing supporting main body as the narrow supporting filling body system of high concentration, and the high concentration is narrow to fill
It fills out body support system to be combined and formed by high dense fill material, long narrow cube filling bag, high dense fill material be injected long narrow
Cube fills bag, condenses into the narrow obturation support of high concentration and adopts rear top plate, is tended towards stability by observing and surveying roof pressure value
Afterwards, terminate to connect firm Support, start to carry out normal filling mining using normal concentration filler and wide filling bag.
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| CN114810203A (en) * | 2022-06-02 | 2022-07-29 | 紫金矿业集团股份有限公司 | Large-size filling body strength strengthening and construction method |
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