CN110486016A - A method of improving strip coal pillar stability - Google Patents
A method of improving strip coal pillar stability Download PDFInfo
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- CN110486016A CN110486016A CN201910755900.XA CN201910755900A CN110486016A CN 110486016 A CN110486016 A CN 110486016A CN 201910755900 A CN201910755900 A CN 201910755900A CN 110486016 A CN110486016 A CN 110486016A
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- anchor pole
- lane region
- coal
- band
- spoil
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- 239000003245 coal Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000006210 lotion Substances 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 230000005641 tunneling Effects 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 7
- 238000007569 slipcasting Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003245 working effect Effects 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
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Remote Sensing (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of methods for improving strip coal pillar stability, are related to coal mining technology field.This method comprises: designing the width in No. 1 band headentry road according to coal seam geological condition first and expanding the width in lane region, expansion lane then is carried out along strip coal pillar side when transportation roadway tunnels certain distance and is reinforced.Supporting is carried out in such a way that laying metal mesh and brill beat anchor pole to the top plate for expanding lane region, secondly vertical strip coal column brill beats anchor pole and carries out supporting, then constructs a divider wall in the other side in expansion lane region, pours spoil lotion to expansion lane region after the completion of isolation.Alternately above-mentioned steps are repeated, until completing No. 1 band headentry road driving and expanding the reinforcing in lane region, and so on complete the driving in No. 2 band tailentry roads and expand the reinforcing in lane region.The method of the present invention can form the overall structure of " spoil lotion-anchor pole-coal column-anchor pole-spoil lotion ", to keep the enhancing of strip coal pillar bearing capacity, stability high.
Description
Technical field
The present invention relates to coal mining technology field more particularly to a kind of methods for improving strip coal pillar stability.
Background technique
It is building, in structures mining pressed coal, Striping noise is one of the effective means for controlling subsidence, it has also become China
Under village and be not suitable for resettlement build, under structures mining pressed coal main technique methods.Striping noise stays the coal column set to need
There are enough strength and stabilities, effectively to support the weight of overlying rock.But in recovery process, strip coal pillar
To meet bearing overburden weight, many factors will lead to coal column and unstability, roof falling over great extent, earth's surface occur short of width
Also occur large area therewith to collapse.Therefore, the stability for improving strip coal pillar is the technology pass of Striping noise control subsidence
Key.
The correlative study in terms of improving strip coal pillar stability mainly has in the prior art:
Number of patent application 201510156783.7 discloses a kind of utilization slip casting combined supporting anchor pole promotion strip coal pillar
The method of energy devises the structure of slip casting combined supporting anchor pole, and promotes strip coal pillar using slip casting combined supporting anchor pole
The method of performance realizes the slip casting of strip coal pillar yield region and strip coal pillar yield region, elastic region suspension roof support dual function,
The bearing capacity of one side yield region is improved, the sidewise restraint certain to coal column of another aspect slip casting combined supporting anchor pole
Power, coal column are converted into triaxial stress state from two to stress, and pillar strength is improved, and performance is improved.It should
Method is to carry out slip casting to yield region using grouted anchor bar, and grouting process is more complex, does not replace coal column.
Although the above-mentioned prior art achieves certain progress in terms of improving strip coal pillar stability, however, it is also deposited
In shortcoming: as its grouting process is complex, and only limiting the transversely deforming of strip coal pillar in the prior art, not
Coal column is displaced, also without the recovery ratio of raising coal resources.
Summary of the invention
In order to overcome the problems of the above-mentioned prior art, the invention proposes a kind of sides for improving strip coal pillar stability
Method the problem of when this method solve strip coal pillar short of width to support overburden weight, can improve holding for strip coal pillar
Loading capability can prevent coal column from unstable failure occurs, and this method can also reduce staying for strip coal pillar and set width, and coal resources can be improved
The rate of recovery.
Its technical solution includes:
A method of improve strip coal pillar stability, successively the following steps are included:
A, according to coal seam geological condition, No. 1 band working face, No. 2 band working faces are divided, designs No. 1 band work first
Make the width of the haulage drift in face and expands the width in lane region；
B, in haulage drift tunneling process, after the every driving certain distance of haulage drift, along band coal in haulage drift
Column side carries out expansion lane, is formed and expands lane region；
C, the expansion lane region described in step b reinforces, and back is using laying metal mesh when expanding lane region reinforcement
Supporting is carried out with the mode for beating anchor pole is bored, so that being connected to become an entirety, and vertical strip coal with transportation roadway top plate metal mesh
Cylindrical drill beats anchor pole and carries out supporting, and anchor pole protruded length is 30~50cm；
D, after the completion of step c supporting, it is described expand lane region the other side construct a divider wall, will expand lane region and
Haulage drift is isolated, and carries out pouring spoil lotion, anchor pole exposed parts and spoil to expansion lane region after the completion of isolation work
Lotion pours together, forms the ruggedized construction of " coal column-anchor pole-spoil lotion "；
E, alternately step b-d is repeated, until completing the driving in No. 1 band headentry road and expanding lane region
It reinforces；
F, it similarly, completes the driving in No. 2 band tailentry roads and expands the reinforcing in lane region；
G, after the completion of entire work step, " spoil lotion-anchor pole-coal column-anchor pole-spoil lotion " structure is formed.
Above-mentioned " spoil lotion-anchor pole-coal column-anchor pole-spoil lotion " structure, improves whole resistance to deformation energy
Power has better stability.
Further preferably, top plate metal mesh is connected to become an entirety with transportation roadway metal mesh when expanding lane region reinforcement, prevents
Only absciss layer and fracture occur for top plate；Coal column and two sides spoil lotion are linked together by anchor pole, so that spoil lotion and coal column
Collectively constitute an entirety.
Above-mentioned spoil lotion and coal column collectively constitute an entirety, and bearing capacity is strong, and stability is high.And it plays
The effect of spoil lotion replacing section strip coal pillar, improves the rate of recovery of coal resources.
Compared with prior art, present invention offers following advantageous effects:
By expanding lane driving, using spoil lotion replacing section coal column, the rate of recovery of coal resources is improved, reduces coal money
The waste in source；In addition, " spoil lotion-anchor pole-coal column-anchor pole-spoil lotion " that this solves strip coal pillars is wide
The problem of spending when being not enough to support overburden weight has ensured that coal column has bearing capacity, has improved the stability of coal column, effectively
Support overlying rock.
Strip coal pillar performance is promoted using slip casting combined supporting anchor pole with a kind of disclosed in application number 201510156783.7
Method compare, the present invention in two stope drift active workings along the lane strip coal pillar Ce Kuo tunnel, expand lane region top plate metal mesh with transport
Defeated lane metal is connected to become an entirety, prevents roof delamination, and anchor pole is installed on strip coal pillar, then carries out to expansion lane region
Spoil lotion is poured, anchor pole exposed parts and spoil lotion are poured together, forms a kind of " spoil lotion-anchor pole-coal
The intensity of spoil lotion and coal column entirety can be improved in the ruggedized construction of column-anchor pole-spoil lotion ".
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is floor map of the invention；
Fig. 2 is the strip coal pillar region enlarged diagram of Fig. 1；
Fig. 3 is the A-A sectional view of Fig. 1.
In figure: 1, No. 1 band working face；2, No. 2 band working faces；3, strip coal pillar；4, the transport of No. 1 band working face
Tunnel；5, the return aircourse of No. 2 band working faces；6, expand lane region；7, anchor pole is helped；8, anchor pole is pushed up；9, metal mesh.
Specific embodiment
The invention proposes a kind of methods for improving strip coal pillar stability, in order to make advantages of the present invention, technical solution
It is clearer, clear, it elaborates combined with specific embodiments below to the present invention.
Main innovation point of the invention is: expanding lane region top plate metal mesh with transportation roadway top plate metal mesh and is connected to become one
A entirety, prevents top plate from absciss layer, fracture occurs, and strip coal pillar upper bolt exposed parts and spoil lotion pour together, increase
The intensity of strip coal pillar and spoil lotion, has been integrally formed " spoil lotion-anchor pole-strip coal pillar-anchor pole-spoil cream
The structure of body ".
In conjunction with shown in Fig. 1 to Fig. 3, the present invention provides a kind of methods for improving strip coal pillar stability, including following step
It is rapid:
Step 1: dividing No. 1 band working face 1 and No. 2 band working face 2 according to coal seam geological condition, 1 is designed first
The width of the haulage drift 4 of number band working face and the width for expanding lane region 6；
Step 2: in haulage drift tunneling process, after the every driving certain distance of haulage drift 4 of No. 1 band working face,
Expansion lane is carried out along 3 side of strip coal pillar in the haulage drift 4 of No. 1 band working face, is formed and expands lane region 6；
Step 3: being reinforced lane region 6 is expanded, expands back when lane region 6 reinforces and use laying metal mesh 9 and bore
The mode of topping anchor pole 8 carries out supporting, so that being connected to become an entirety, and vertical strip coal column with transportation roadway top plate metal mesh
Brill beats side anchor pole 7 and carries out supporting, and anchor pole protruded length is 30~50cm；
Step 4: constructing a divider wall after the completion of the supporting described in the step 3 in the other side for expanding lane region 6, expanding
Lane region 6 and haulage drift 4 are isolated, and carry out pouring spoil lotion to expansion lane region 6 after the completion of isolation work, anchor pole is exposed
Part pours together with spoil lotion, forms the ruggedized construction of " coal column-anchor pole-spoil lotion "；
Step 5: alternately step 2-step 4 is repeated, until completing the pick in No. 1 band headentry road 4
Into the reinforcing with expansion lane region 6；
Step 6: similarly, completing the driving of the return aircourse 5 of No. 2 band working faces and expanding the reinforcing in lane region 6；
Step 7: " spoil lotion-anchor pole-coal column-anchor pole-spoil cream can be formed after the completion of above-mentioned work step
Body " structure improves whole non-deformability, has better stability.
Embodiment 1:
It applies the inventive method in the mine of Shandong, is with the strip coal pillar between 3104 working faces, 3105 working faces
Example, coal seam thickness 7.6m, mining depth 665m.
Its specific recovery method are as follows:
The first step, the roof and floor condition in conjunction with coal seam determine that 3104 roadway workfaces are arranged, the transport of 3104 band working faces
Tunnel uses rectangular cross section, 4000 × 3300mm of net section size.
After the every driving 5m of second step, haulage drift, carries out expanding lane driving along strip coal pillar side in haulage drift, formed and expanded
The wide 10m in lane region is expanded in lane region.
Step 3: reinforcing lane region is expanded, back is used to be laid with metal mesh and bore and be beaten when expanding lane region reinforcement
The mode of anchor pole carries out supporting, so that being connected to become an entirety with transportation roadway top plate metal mesh, and vertical strip coal column brill is beaten
Anchor pole carries out supporting, and anchor pole selects the nothing of 22 × 2400mm of Φ to indulge muscle left hand thread steel KMG500 high strength anchor bar, and array pitch is 700
× 800mm, anchor pole protruded length are 30cm.
After the completion of 4th step, the supporting described in the step 3, a divider wall is constructed in the other side for expanding lane region, lane will be expanded
Region and haulage drift are isolated, and carry out pouring spoil lotion, anchor pole exposed parts to expansion lane region after the completion of isolation work
It is poured together with spoil lotion, forms the ruggedized construction of " coal column-anchor pole-spoil lotion ".
5th step repeats alternately Step 2: Step 3: step 4, until completing 3104 band headentries
The driving in road and the reinforcing for expanding lane region.
6th step, similarly completes the driving in 3105 band tailentry roads and expands the reinforcing in lane region.
After the completion of 7th step, above-mentioned work step, " spoil lotion-anchor pole-coal can be formed between 3104 and 3015 working faces
Column-anchor pole-spoil lotion " structure, improves whole non-deformability, has better stability.
The method of the present invention uses bearing structure of the spoil lotion as overlying rock, can effectively control subsidence；It should
Method makes full use of anchor pole that spoil lotion and coal column are connected as an entirety, improves whole non-deformability；In addition, using
Spoil lotion replacing section coal column, improves the rate of recovery of coal resources, increases economic benefit.
It uses for reference the prior art and can be realized in the part that do not addressed in the present invention.
It should be noted that any equivalent way that those skilled in the art are made under the introduction of this specification, or
Obvious variant should all be within the scope of the present invention.
Claims (2)
1. it is a kind of improve strip coal pillar stability method, which is characterized in that successively the following steps are included:
A, according to coal seam geological condition, No. 1 band working face, No. 2 band working faces are divided, designs No. 1 band working face first
Haulage drift width and expand lane region width；
B, in haulage drift tunneling process, after the every driving certain distance of haulage drift, along strip coal pillar side in haulage drift
Expansion lane is carried out, is formed and expands lane region；
C, the expansion lane region described in step b reinforces, and back is using laying metal mesh and brill when expanding lane region reinforcement
The mode for beating anchor pole carries out supporting, so that being connected to become an entirety with transportation roadway top plate metal mesh, and vertical strip coal column bores
It beats anchor pole and carries out supporting, anchor pole protruded length is 30~50cm；
D, after the completion of step c supporting, a divider wall is constructed in the other side for expanding lane region, lane region and transport will be expanded
Tunnel is isolated, and carries out pouring spoil lotion, anchor pole exposed parts and spoil lotion to expansion lane region after the completion of isolation work
It pours together, forms the ruggedized construction of " coal column-anchor pole-spoil lotion "；
E, alternately step b-d is repeated, until completing the driving in No. 1 band headentry road and expanding adding for lane region
Gu；
F, it similarly, completes the driving in No. 2 band tailentry roads and expands the reinforcing in lane region；
G, after the completion of entire work step, " spoil lotion-anchor pole-coal column-anchor pole-spoil lotion " structure is formed.
2. a kind of method for improving strip coal pillar stability according to claim 1, it is characterised in that: expand lane region reinforcement
When top plate metal mesh with transportation roadway metal mesh be connected to become an entirety；Coal column and two sides spoil lotion are connected to one by anchor pole
It rises, so that spoil lotion and coal column collectively constitute an entirety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910755900.XA CN110486016A (en) | 2019-08-16 | 2019-08-16 | A method of improving strip coal pillar stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910755900.XA CN110486016A (en) | 2019-08-16 | 2019-08-16 | A method of improving strip coal pillar stability |
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| CN110486016A true CN110486016A (en) | 2019-11-22 |
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| CN201910755900.XA Pending CN110486016A (en) | 2019-08-16 | 2019-08-16 | A method of improving strip coal pillar stability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198104A (en) * | 2021-12-15 | 2022-03-18 | 中天合创能源有限责任公司 | Long-distance coal pillar plugging and reinforcing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198104A (en) * | 2021-12-15 | 2022-03-18 | 中天合创能源有限责任公司 | Long-distance coal pillar plugging and reinforcing method |
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