CN110030031A - The method that coal column is left in a kind of longwell recycling house column type goaf - Google Patents
The method that coal column is left in a kind of longwell recycling house column type goaf Download PDFInfo
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- CN110030031A CN110030031A CN201910142718.7A CN201910142718A CN110030031A CN 110030031 A CN110030031 A CN 110030031A CN 201910142718 A CN201910142718 A CN 201910142718A CN 110030031 A CN110030031 A CN 110030031A
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- 239000003245 coal Substances 0.000 title claims abstract description 176
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004064 recycling Methods 0.000 title claims abstract description 30
- 238000011049 filling Methods 0.000 claims abstract description 66
- 238000005065 mining Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 239000010881 fly ash Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- 235000012255 calcium oxide Nutrition 0.000 claims description 6
- 239000003818 cinder Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 5
- 239000010883 coal ash Substances 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 2
- 239000000843 powder Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 28
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000011084 recovery Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 241000158728 Meliaceae Species 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/60—Devices for withdrawing props or chocks
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Remote Sensing (AREA)
- Revetment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides the method that coal column is left in a kind of longwell recycling house column type goaf, step includes: according to mine condition and material characteristic design using coal as the component of the cemented fill of aggregate and its proportion；Filling Station is established, broken and cemented fill the preparation of coal is completed；Obturation slurry is full of house column type goaf by Pipeline transport to underground house column type goaf；After cemented fill is solidified to design strength, coal wall is arranged in the house column type goaf full of cemented fill；Mining device is installed, house column type is left into coal column and cemented fill and exploits recycling together.The method that coal column is left in a kind of longwell recycling house column type goaf provided by the invention, recovery method is simply mature, and safety is good, and yield is high；Cemented fill obtains the significant advantage for not influencing coal quality conveniently, after back production at low cost, material using coal as aggregate.
Description
Technical field
The present invention relates to room and pillar minings to leave Pillar Recovery and mine filling production technique field, in particular to a kind of length
The method that coal column is left in wall recycling house column type goaf.
Background technique
In recent years, with the exhaustion of eastern region coal resources, Jin, Shaanxi and Inner Mongolia area is increasingly becoming the important raw coal in China and produces
Ground and coal output ground.However, this area leaves a large amount of house column type goaf by exploitation for many years, house column type goaf is given
Bring following problem in locality: 1) waste of a large amount of high-quality coal resources.House pillar type coal mining method coal mining rate is only 30%-
50%, some Local Small Coal Mine recovery ratios are even less than 30%, and a large amount of good coal column resources of leaving leave underground, cause big
Measure the waste of coal resources.2) top plate large area collapsing risk.As time goes by, rheology occurs for coal column, and it is big to cause top plate
Area collapses suddenly, causes earthquake of collapsing, brings security risk to underground production and living.3) spontaneous combustion in goaf is hidden
Suffer from.4) underground water is destroyed, soil erosion is caused.The Pillar Recovery technology used in the past, which exists, not can solve ventilating problem, top plate
Management difficulty is big, leaves the easily unexpected unstability of coal column, the problems such as back production efficiency is lower, lacks safe and efficient recovery method.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of safe and efficient longwell recycling house column type goafs to leave
The method of coal column.
In order to solve the above technical problems, the present invention provides the sides that coal column is left in a kind of longwell recycling house column type goaf
Method includes the following steps:
According to mine condition and material characteristic design using coal as the component of the cemented fill of aggregate and its proportion；
Filling Station is established, the broken of cemented fill is completed and is prepared；
Cemented fill is sent to house column type goaf by pipeline full of house column type goaf；
After cemented fill is solidified to design strength, setting longwell is opened in the house column type goaf full of cemented fill
Mining face；
Mining device is installed in longwall face, house column type is left into coal column and cemented fill broadwall together
Recycling.
Further, every cube of the cemented fill includes the coal 1300-1600Kg as coarse aggregate, is used as fine aggregate
Flyash 60-100Kg, cementitious matter 30-50Kg, accelerator 3.0-6.5Kg, water-reducing agent 1.5-3.5Kg and mine water 510-
660Kg。
Further, the coal is the coal cinder or coal particle that partial size is less than 24mm after two-stage crushing, and wherein partial size is
20mm-24mm's accounts for 1%-5%, and the 1%-5% that accounts for that partial size is 17.5mm-20mm, partial size is accounting for for 13.5mm-17.5mm
10%-15%, the 20%-25% that accounts for that partial size is 9mm-13.5mm, partial size account for 25%-35% for 5mm-9mm's, and partial size is
4.3mm-5mm's accounts for 10%-15%, and the 6%-12% that accounts for that partial size is 0.1mm-4.3mm, partial size is accounting for for 0.075mm-0.1mm
2%-6%.
Further, the flyash is power plant's second level or three-level flyash, and the cementitious matter is 32.5 or 42.5 grades
One or more of ordinary portland cement, carbide slag and steel slag, the accelerator is by aluminum oxide clinker, sodium carbonate and quick lime
It is formulated in the ratio of quality 1.1:1.1:0.6, the water-reducing agent is ligno-sulfate based plasticizer, and the mine water is mine
Well draining.
Further, the Filling Station includes crushing system, stirring system, pumping system and automatic control system, institute
Ground should be arranged in by stating Filling Station.
Further, the filling borehole bottom of the Filling Station should reach filled house column type goaf coal seam.
Further, sublevel fill stoping, every 10-20m setting one are used when the cemented fill filling house column type goaf
Section, and barricade is set, each filling section cemented fill barrier is sealed, air bag, mould bag or wood point cylindricality can be used in the barricade
Formula.
Further, in order to guarantee Tight filling effect, the fill area is used in the side of the pre-buried filling piping of top plate
Method.
Further, the arrangement coal wall is to fill after obturation solidification reaches design strength full of cementing
It fills out in the house column type goaf of body to tunnel crossheading and cut eye and be arranged；
Further, the broadwall is postponed in longwall face cloth, and installation includes coalcutter and hydraulic branch
The equipment of frame, by coal column and cemented fill broadwall recycling together.
A kind of method that coal column is left in recycling house column type goaf provided by the invention, first by house column type goaf to coal
Filled for the cemented fill of aggregate, then arrange coal wall, finally by using coal as the cemented fill of aggregate with
House column type is left coal column and is recycled together, and recovery method is simply mature, and safety is good, and yield is high, and using coal as the cementing of aggregate
The coal quality that obturation leaves coal column to the house column type of exploitation does not influence, and is drawn materials conveniently with coal, at low cost, and can recycle benefit
With.
Detailed description of the invention
Fig. 1 is that house column type in the method for coal column is left in a kind of longwell recycling house column type goaf provided in an embodiment of the present invention
The plan view in goaf；
Fig. 2 is the process that a kind of longwell provided in an embodiment of the present invention recycles that the method for coal column is left in house column type goaf
Figure；
Fig. 3 is that Filling Station in the method for coal column is left in a kind of longwell recycling house column type goaf provided in an embodiment of the present invention
Filling system structure chart；
Fig. 4 is that house column type in the method for coal column is left in a kind of longwell recycling house column type goaf provided in an embodiment of the present invention
Plan view after goaf filling；
Fig. 5 leaves longwell in the method for coal column for a kind of longwell recycling house column type goaf provided in an embodiment of the present invention and opens
Adopt plan view.
Specific embodiment
It is mined out that a large amount of house column type is left in some coal mines since the past passes through the improper exploitation of many years referring to Fig. 1
Area has left in coal mining room 20 and has largely left coal column 19, and the size L of the bordroom 20 in house column type goaf often reaches 3-6m,
The size M of coal column 19 often reaches 6-15m, and coal column 19 and top plate are able to maintain preferable stability.It is big in house column type goaf
It measures good coal column of leaving and leaves underground, cause the waste of a large amount of coal resources, while house column type goaf is also given and works as area
Carry out a large amount of hidden danger, but there is no safe and efficient recovery methods at present.
Based on above-mentioned consideration, the invention proposes use first coal for aggregate (coal aggregate accounts for 90% or more that slurry is expected admittedly)
Adhesive bond fills house column type goaf, and goaf is made to become entity, then arranges that coal wall will leave coal column together with filling
Body exploits the idea and method of recycling together.
Referring to fig. 2, the present invention provides a kind of method that coal column is left in recycling house column type goaf, include the following steps:
Step 1: as the component of the cemented fill of aggregate and being matched according to mine actual conditions and material characteristic design using coal
Than the proportion including determining coal aggregate cemented fill, the partial size of coal and other required additives keep pulp quality dense
Degree reaches 75%-83%, and the slump reaches 22-30cm, so that the mobility of filling slurry and the strength of filling mass after solidification are expired
Foot filling requirement.Wherein, every cube of the cemented fill includes the coal 1300-1600Kg as coarse aggregate, is used as thin
The flyash 60-100Kg of aggregate, cementitious matter 30-50Kg, accelerator 3.0-6.5Kg, water-reducing agent 1.5-3.5Kg and mine water
510-660Kg.The coal is the coal cinder or coal particle that partial size is less than 24mm after two-stage crushing, and partial size is 20mm-24mm's
1%-5%, the 1%-5% that accounts for that partial size is 17.5mm-20mm are accounted for, partial size accounts for 10%-15%, partial size for 13.5mm-17.5mm's
For the 20%-25% that accounts for of 9mm-13.5mm, the 25%-35% that accounts for that partial size is 5mm-9mm, partial size accounts for 10%- for 4.3mm-5mm's
15%, the 6%-12% that accounts for that partial size is 0.1mm-4.3mm, partial size accounts for 2%-6% for 0.075mm-0.1mm's.The flyash
For power plant's second level or three-level flyash, ordinary portland cement, carbide slag or the steel slag that the cementitious matter is 32.5 or 42.5 grades.
The accelerator be main component be sodium aluminate aluminum oxide clinker, sodium carbonate and quick lime in quality 1.1:1.1:0.6 ratio
It is formulated, the water-reducing agent is ligno-sulfate based plasticizer, and the mine water is mine drainage.
Step 2: referring to Fig. 3, establishing Filling Station on ground.Filling Station includes crushing system, stirring system and pumping system
System etc..Coal 1 is transported to crusher 3 by loading machine 2 and is crushed to required partial size, is stored in broken coal storehouse 4, it will according to design proportion
Broken coal (passing through weighing belt 5), flyash (being stored in fine coal ash cellar 14), cementitious matter (being stored in fine coal ash cellar 15) and water
(being stored in pond 16) weighs through bucket 6, is sent into high-speed stirred bucket 7 and forced stirrer 8 is stirred, after the completion of stirring
Coal aggregate cementitious slurry is formed, opens drain hole, slurry enters filling pump, through ground pipeline 10 and vertical drilling pipeline after pressurization
17 enter underground, and the house column type goaf of underground is entered by underground filling pipeline 18, fill coal mining room 20.Ground pipeline peace
Densimeter 11, pressure gauge 12 and flowmeter 13 are filled, to monitor flow regime of the slurry in pipeline.
Step 3: referring to fig. 4, coal aggregate cementitious slurry enters underground house column type goaf by underground filling pipeline 18, fills
Coal mining room 20 is filled out, until coal aggregate cementitious slurry is full of entire house column type goaf.With ground paste filling house column type goaf
Shi Caiyong sublevel fill stoping, every 10-20m are arranged one section, and construct barricade 22 and realize to each coal aggregate cementitious slurry for filling section
Barrier sealing.Air bag, mould bag or wood point cylindricality formula can be used in the barricade 22.Also, to guarantee to connect top effect, the pipe
Road should take in measures such as the pre-buried filling pipings of top plate.Cemented fill 21 is formed after the solidification of coal aggregate cementitious slurry, it is cementing
28 days design uniaxial compressive strength 1.0-2.0MPa of obturation.
Step 4: referring to Fig. 5, being full of house column type goaf in cemented fill and uniaxial compressive strength reaches design objective
Afterwards, it arranges coal wall in house column type goaf, constructs and air return way 2, air return way 24 and cut eye 25, coal wall
Tendency length and strike length determined according to house column type goaf full of the actual conditions after cemented fill.
Step 5: referring to Fig. 5, back production and support apparatus, including coalcutter 27 and hydraulic support being installed in coal wall
26, coalcutter 27 and hydraulic support 26 tunnel forward along air return way 2 and 24 direction of air return way, by coal column 19 and coal aggregate
Cemented fill 21 is recycled together, and coal wall goaf 28 is formed after recycling.
The method that coal column is left in this recycling longwell house column type goaf provided by the invention, first makees in goaf to coal
The cemented fill of aggregate is filled, and then arranges coal wall, and cemented fill is recycled together with coal column with leaving, is opened
Mining method is simply mature, and safety is good, and yield is high；Cemented fill using coal as aggregate, have at low cost, material obtain it is convenient,
The significant advantage of coal quality is not influenced after back production.
A kind of recycling house column type goaf method for leaving coal column provided by the invention is done below by specific embodiment
It illustrates.
Embodiment 1
House column type goaf under certain mine, flat seam, buried depth H=410m adopt thick M=3m, mining width L=6m,
Leave coal pillar width D=6m.Every cube of obturation of coal aggregate proportion of use are as follows: coal 1394Kg；Flyash 66Kg；Cementitious matter
40Kg；Additive accelerator 5.5Kg and water-reducing agent 2.5Kg；Mine water 590Kg.Pulp quality concentration 71.9%, the slump
23cm, 28d uniaxial compressive strength 1.1MPa.
The coal is the coal cinder and coal particle that partial size is less than 24mm after two-stage crushing, and coal is coking coal, and partial size is
20mm-24mm's accounts for 4%, and partial size accounts for 5% for 17.5mm-20mm's, and partial size accounts for 12% for 13.5mm-17.5mm's, and partial size is
9mm-13.5mm's accounts for 23%, and partial size accounts for 29% for 5mm-9mm's, and partial size accounts for 16% for 4.3mm-5mm's, and partial size is
0.1mm-4.3mm's accounts for 8%, and partial size accounts for 3% for 0.075mm-0.1mm's.
The flyash is power plant's second class powered coal ash, the ordinary portland cement that the cementitious matter is 32.5 grades, the speed
Solidifying agent is to be formulated by aluminum oxide clinker, sodium carbonate, quick lime in the ratio of quality 1.1:1.1:0.6, and the water-reducing agent is wood
Mahogany sulfonate water-reducing agent, the mine water are mine drainage.
The preparation, filling of coal aggregate consolidated fill slurry described in the present embodiment and coal wall exploitation, including it is following
Step:
(a) prepared by filling slurry: coal first being carried out primary crushing by jaw crusher, discharging partial size controls respectively
55-95mm sieves the coal after primary breakup with vibrating screen, and coal particle of the partial size greater than 24mm passes through secondary breaker
Second-time breakage is carried out, makes processing after coal particle partial size all less than 24mm, the coal particle after two-stage crushing is vibrated by classification
Sieve, is then used cooperatively according to grain size grading specification according to design proportion respectively；
(b) ground stirring and pumping: getting out the raw materials such as flyash, cementitious matter, accelerator, water-reducing agent and mine water, will
Each raw material puts into blender by feeding system or water pump according to the ratio, opens drain hole, the peace of the drain hole after the completion of stirring
Holding position is higher than the feed inlet of filling stock grout hopper, and the coal aggregate cementitious slurry enters the slurry bucket of filling pump, the coal bone
Expect that cementitious slurry under the pressurization of ground filling pump, enters underground house column type goaf by filling piping, fills energy
Power 150m3/h。
(c) underground filling: every in the bordroom of house column type goaf after obturation uniaxial compressive strength reaches 1.1MPa
20m fills section both ends and builds barricade to realize the barrier sealing of slurry in filling section, barricade uses mould bag as a filling section
Form；Since top plate may not be smooth, to guarantee that obturation connects top effect, take in measures such as the pre-buried filling pipings of top plate.
(d) coal wall arrange: in the house column type goaf filled arrange coal wall (be inclined to long 200m,
Move towards long 2000m), eye and 2 crossheadings are cut along house column type goaf bordroom driving (or planning is reserved in advance), and coalcutter is installed
The production equipments such as SL300, hydraulic support ZY10000/16/32D, drag conveyor SGZ1000/2 × 1000 and ventilation equipment (or
System), meet safety and production capacity requirement.
(e) coal wall is exploited: Stoping process flow are as follows: coalcutter coal cutting and obturation → shifting frame → passage scraper plate are defeated
Send machine.Using coalcutter cutting coal and obturation, mining height 3m, round trip uses into two knives, feed and cuts Triangle Coal end beveled
Feed mode.Designed productive capacity 5000t/d.
Embodiment 2
House column type goaf under certain mine, seam inclination α=5 °, buried depth H=570m adopt thick M=4.5m, mining width L
=5m leaves coal pillar width D=8m.The coal aggregate obturation of use matches are as follows: coal 1450Kg；Flyash 66Kg；Cementitious matter
42Kg；Additive accelerator 6.1Kg and water-reducing agent 1.9Kg；Mine water 574Kg.Pulp quality concentration 72.4%, the slump
23.5cm, 28d uniaxial compressive strength 1.5MPa.
The coal is the coal cinder and coal particle that partial size is less than 20mm after two-stage crushing, and coal is anthracite, and partial size is
17.5mm-20mm's accounts for 7%, and partial size accounts for 15% for 13.5mm-17.5mm's, and partial size accounts for 22% for 9mm-13.5mm's, partial size
27% is accounted for for 5mm-9mm, partial size accounts for 17% for 4.3mm-5mm's, and partial size accounts for 8% for 0.1mm-4.3mm's, and partial size is
0.075mm-0.1mm's accounts for 4%.
The flyash is power plant's three-level flyash, the ordinary portland cement that the cementitious matter is 42.5 grades, the speed
Solidifying agent is to be formulated by aluminum oxide clinker, sodium carbonate, quick lime in the ratio of quality 1.1:1.1:0.6, and the water-reducing agent is wood
Mahogany sulfonate water-reducing agent, the mine water are mine drainage.
The preparation, filling of coal aggregate consolidated fill slurry described in the present embodiment and coal wall exploitation, including it is following
Step:
(a) prepared by filling slurry: coal first being carried out primary crushing by jaw crusher, discharging partial size controls respectively
50-91mm sieves the coal after primary breakup with vibrating screen, and coal particle of the partial size greater than 20mm passes through secondary breaker
Second-time breakage is carried out, makes processing after coal particle partial size all less than 20mm, the coal particle after two-stage crushing is vibrated by classification
Sieve, is then used cooperatively according to grain size grading specification according to design proportion respectively；
(b) ground stirring and pumping: getting out the raw materials such as flyash, cementitious matter, accelerator, water-reducing agent and mine water, will
Each raw material puts into blender by feeding system or water pump according to the ratio, opens drain hole, the peace of the drain hole after the completion of stirring
Holding position is higher than the feed inlet of filling stock grout hopper, and the coal aggregate cementitious slurry enters the slurry bucket of filling pump, the coal bone
Expect that cementitious slurry under the pressurization of ground filling pump, enters underground house column type goaf by filling piping, fills energy
Power 160m3/h。
(c) underground filling: every 18m fills section both ends and builds gear as a filling section in the bordroom of house column type goaf
Wall is sealed with the barrier for realizing slurry in filling section, and barricade uses airbag form；Since top plate may not be smooth, to guarantee obturation
Top effect is connect, is taken in measures such as the pre-buried filling pipings of top plate.
(d) coal wall is arranged: after obturation uniaxial compressive strength reaches 1.5MPa, being adopted in the house column type filled
Coal wall (being inclined to long 185m, move towards long 2000m) is arranged in dead zone, cuts eye and 2 crossheadings along house column type goaf bordroom
Driving (or planning is reserved in advance), installs coalcutter SL-500, hydraulic support ZY10000/24/50, drag conveyor
The production equipments such as SGZ1200/2 × 1000 and ventilation equipment (or system) meet safety and production capacity requirement.
(e) coal wall is exploited: Stoping process flow are as follows: coalcutter coal cutting and obturation → shifting frame → passage scraper plate are defeated
Send machine.Using coalcutter cutting coal and obturation, mining height 4.5m, for round trip into two knives, feed is oblique using Triangle Coal end is cut
Cutting-in tool mode.Designed productive capacity 6500t/d.
Embodiment 3
House column type goaf under certain mine, seam inclination α=7 °, buried depth H=634m adopt thick M=5.8m, mining width L
=4m leaves coal pillar width D=9m.The coal aggregate obturation of use matches are as follows: coal 1503Kg；Flyash 70Kg；Cementitious matter
35Kg；Additive accelerator 5.2Kg and water-reducing agent 2.8Kg；Mine water 612Kg.Pulp quality concentration 72.5%, the slump
22.5cm, 28d uniaxial compressive strength 1.7MPa.
The coal is the coal cinder and coal particle that partial size is less than 22mm after two-stage crushing, and coal is meager coal, and partial size is
22mm-20mm's accounts for 4%, and partial size accounts for 5% for 17.5mm-20mm's, and partial size accounts for 11% for 13.5mm-17.5mm's, and partial size is
9mm-13.5mm's accounts for 24%, and partial size accounts for 31% for 5mm-9mm's, and partial size accounts for 11% for 4.3mm-5mm's, and partial size is
0.1mm-4.3mm's accounts for 8%, and partial size accounts for 6% for 0.075mm-0.1mm's.
The flyash be power plant's three-level flyash, the cementitious matter be carbide slag, the accelerator be by aluminum oxide clinker,
Sodium carbonate, quick lime are formulated in the ratio of quality 1.1:1.1:0.6, and the water-reducing agent is ligno-sulfate based plasticizer,
The mine water is mine drainage.
The preparation, filling of coal aggregate consolidated fill slurry described in the present embodiment and coal wall exploitation, including it is following
Step:
(a) prepared by filling slurry: coal first being carried out primary crushing by jaw crusher, discharging partial size controls respectively
56-97mm sieves the coal after primary breakup with vibrating screen, and coal particle of the partial size greater than 22mm passes through secondary breaker
Second-time breakage is carried out, makes processing after coal particle partial size all less than 22mm, the coal particle after two-stage crushing is vibrated by classification
Sieve, is then used cooperatively according to grain size grading specification according to design proportion respectively；
(b) ground stirring and pumping: getting out the raw materials such as flyash, cementitious matter, accelerator, water-reducing agent and mine water, will
Each raw material puts into blender by feeding system or water pump according to the ratio, opens drain hole, the peace of the drain hole after the completion of stirring
Holding position is higher than the feed inlet of filling stock grout hopper, and the coal aggregate cementitious slurry enters the slurry bucket of filling pump, the coal bone
Expect that cementitious slurry under the pressurization of ground filling pump, enters underground house column type goaf by filling piping, fills energy
Power 200m3/h。
(c) underground filling: every 15m fills section both ends and builds gear as a filling section in the bordroom of house column type goaf
Wall is sealed with the barrier for realizing slurry in filling section, and barricade is using wood point cylindricality formula；Since top plate may not be smooth, to guarantee filling
Body connects top effect, takes in measures such as the pre-buried filling pipings of top plate.
(d) coal wall is arranged: after obturation uniaxial compressive strength reaches 1.7MPa, being adopted in the house column type filled
Coal wall (being inclined to long 225m, move towards long 2000m) is arranged in dead zone, cuts eye and 2 crossheadings along house column type goaf bordroom
Driving (or planning is reserved in advance), installs coalcutter 7LS7, hydraulic support ZY13000/28/62D, drag conveyor SGZ1250/
The production equipments such as 3 × 1000 and ventilation equipment (or system) meet safety and production capacity requirement.
(e) coal wall is exploited: Stoping process flow are as follows: coalcutter coal cutting and obturation → shifting frame → passage scraper plate are defeated
Send machine.Using coalcutter cutting coal and obturation, mining height 5.8m, for round trip into two knives, feed is oblique using Triangle Coal end is cut
Cutting-in tool mode.Designed productive capacity 8500t/d.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. the method that coal column is left in a kind of longwell recycling house column type goaf, which comprises the steps of:
According to mine condition and material characteristic design using coal as the component of the cemented fill of aggregate and its proportion；
Filling Station is established, broken and cemented fill the preparation of coal is completed；
Cemented fill is full of house column type goaf by Pipeline transport to house column type goaf；
After cemented fill is solidified to design strength, broadwall work is arranged in the house column type goaf full of cemented fill
Make face；
Mining device is installed in longwall face, house column type is left coal column and cemented fill, and broadwall returns together
It receives.
2. the method that coal column is left in longwell recycling according to claim 1 house column type goaf, it is characterised in that: the glue
Every cube of obturation of knot includes the coal 1300-1600Kg as coarse aggregate, the flyash 60-100Kg as fine aggregate, cementitious matter
30-50Kg, accelerator 3.0-6.5Kg, water-reducing agent 1.5-3.5Kg and mine water 510-660Kg.
3. the method that coal column is left in longwell recycling according to claim 2 house column type goaf, it is characterised in that: the coal
It is the coal cinder or coal particle that partial size is less than 24mm after two-stage crushing, wherein partial size accounts for 1%-5%, grain for 20mm-24mm
The 1%-5% that accounts for that diameter is 17.5mm-20mm, partial size account for 10%-15%, partial size 9mm-13.5mm for 13.5mm-17.5mm's
Account for 20%-25%, the 25%-35% that accounts for that partial size is 5mm-9mm, partial size is that 4.3mm-5mm accounts for 10%-15%, and partial size is
0.1mm-4.3mm's accounts for 6%-12%, and partial size accounts for 2%-6% for 0.075mm-0.1mm's.
4. the method that coal column is left in longwell recycling according to claim 2 house column type goaf, it is characterised in that: the powder
Coal ash be power plant's second level or three-level flyash, the cementitious matter be 32.5 or 42.5 grades ordinary portland cement, carbide slag and
One or more of steel slag, the accelerator is by aluminum oxide clinker, sodium carbonate and quick lime in the ratio of quality 1.1:1.1:0.6
It prepares, the water-reducing agent is ligno-sulfate based plasticizer, and the mine water is mine drainage.
5. the method that coal column is left in longwell recycling according to claim 1 house column type goaf, it is characterised in that: described to fill
Filling out station includes crushing system, stirring system, pumping system and automatic control system, and the Filling Station is arranged on ground.
6. the method that coal column is left in longwell recycling according to claim 5 house column type goaf, it is characterised in that: described to fill
The filling borehole bottom for filling out station should reach filled house column type goaf coal seam.
7. the method that coal column is left in longwell recycling according to claim 1 house column type goaf, it is characterised in that: in order to protect
Tight filling effect is demonstrate,proved, the fill area uses the method in the pre-buried filling piping of top plate.
8. the method that coal column is left in longwell recycling according to claim 1 house column type goaf, it is characterised in that: the glue
Sublevel fill stoping is used when tying obturation filling house column type goaf, every 10-20m is arranged one section, and barricade is arranged to each filling
Air bag, mould bag or wood point cylindricality formula can be used in section cemented fill barrier sealing, the barricade.
9. the method that coal column is left in longwell recycling according to claim 1 house column type goaf, it is characterised in that: the cloth
Setting longwall face is after obturation solidification reaches design strength, in the house column type goaf full of cemented fill
It tunnels crossheading and cuts eye and be arranged.
10. the method that coal column is left in longwell recycling according to claim 1 house column type goaf, it is characterised in that: described
Broadwall is postponed in longwall face cloth, and installation includes the equipment of coalcutter and hydraulic support, by coal column and cementing
Broadwall recycles obturation together.
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| CN201910142718.7A CN110030031B (en) | 2019-02-26 | 2019-02-26 | Method for long-wall recovery of pillar type goaf remaining coal pillars |
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| CN110410076A (en) * | 2019-08-16 | 2019-11-05 | 山东科技大学 | A kind of filling mining method for leaving Pillar Recovery for old pillars of a house goaf |
| CN110714760A (en) * | 2019-11-08 | 2020-01-21 | 河南理工大学 | Mining method for coal-aluminum symbiotic layered induction collaborative mining |
| CN111677506A (en) * | 2020-05-26 | 2020-09-18 | 中煤科工开采研究院有限公司 | Method and device for realizing upward mining and recovering coal pillars in room-and-pillar type goaf |
| CN111828060A (en) * | 2020-07-17 | 2020-10-27 | 神华神东煤炭集团有限责任公司 | Crossheading isolation coal pillar recovery system and recovery method for fully mechanized coal mining face |
| CN112593940A (en) * | 2020-12-16 | 2021-04-02 | 中煤能源研究院有限责任公司 | Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method |
| BE1027748B1 (en) * | 2019-12-02 | 2021-08-24 | Univ Liupanshui Normal | Device for going through an old incision for the coal mining work surface and its method of use |
| CN113704863A (en) * | 2021-10-28 | 2021-11-26 | 中煤科工集团西安研究院有限公司 | Method for designing key parameters for controlling filling of room-and-column type goaf |
| CN114165280A (en) * | 2021-11-03 | 2022-03-11 | 李龙清 | Column type goaf filling reconstruction coal seam comprehensive mechanical stoping method |
| CN114687794A (en) * | 2022-03-31 | 2022-07-01 | 中国矿业大学(北京) | Coal mine filling and re-mining method |
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| CN110410076A (en) * | 2019-08-16 | 2019-11-05 | 山东科技大学 | A kind of filling mining method for leaving Pillar Recovery for old pillars of a house goaf |
| CN110410076B (en) * | 2019-08-16 | 2021-06-08 | 山东科技大学 | Filling mining method for recovering left coal pillars in goaf of old house pillar |
| CN110714760A (en) * | 2019-11-08 | 2020-01-21 | 河南理工大学 | Mining method for coal-aluminum symbiotic layered induction collaborative mining |
| BE1027748B1 (en) * | 2019-12-02 | 2021-08-24 | Univ Liupanshui Normal | Device for going through an old incision for the coal mining work surface and its method of use |
| CN111677506A (en) * | 2020-05-26 | 2020-09-18 | 中煤科工开采研究院有限公司 | Method and device for realizing upward mining and recovering coal pillars in room-and-pillar type goaf |
| CN111828060A (en) * | 2020-07-17 | 2020-10-27 | 神华神东煤炭集团有限责任公司 | Crossheading isolation coal pillar recovery system and recovery method for fully mechanized coal mining face |
| CN112593940A (en) * | 2020-12-16 | 2021-04-02 | 中煤能源研究院有限责任公司 | Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method |
| CN113704863A (en) * | 2021-10-28 | 2021-11-26 | 中煤科工集团西安研究院有限公司 | Method for designing key parameters for controlling filling of room-and-column type goaf |
| CN113704863B (en) * | 2021-10-28 | 2022-02-18 | 中煤科工集团西安研究院有限公司 | Method for designing key parameters for controlling filling of room-and-column type goaf |
| CN114165280A (en) * | 2021-11-03 | 2022-03-11 | 李龙清 | Column type goaf filling reconstruction coal seam comprehensive mechanical stoping method |
| CN114687794A (en) * | 2022-03-31 | 2022-07-01 | 中国矿业大学(北京) | Coal mine filling and re-mining method |
| CN114687794B (en) * | 2022-03-31 | 2023-11-17 | 中国矿业大学(北京) | Coal mine filling and repeated mining method |
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