CN208473911U - It is a kind of reinforce coal column allow pressure large deformation to draw anchor cable - Google Patents
It is a kind of reinforce coal column allow pressure large deformation to draw anchor cable Download PDFInfo
- Publication number
- CN208473911U CN208473911U CN201820783358.XU CN201820783358U CN208473911U CN 208473911 U CN208473911 U CN 208473911U CN 201820783358 U CN201820783358 U CN 201820783358U CN 208473911 U CN208473911 U CN 208473911U
- Authority
- CN
- China
- Prior art keywords
- anchor cable
- large deformation
- coal column
- pressure
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
Allow pressure large deformation to drawing anchor cable the utility model discloses a kind of reinforcing coal column, this allows pressure large deformation to anchor cable is drawn for reinforcing coal column, two constant-resistance devices of two supporting plates, both ends arrangement arranged including a steel strand wires, both ends and two pressure-release anchor cable locksets of both ends arrangement.Coal column, which uses, between working face allows pressure large deformation to drawing anchor cable support reinforcement, ensure the stability of coal column coal column when moment large deformation (2000mm) after bump generation, crossheading after impacting is avoided to be impacted and buried by coal body by thorough closing, ventilation blocking, personnel and equipment, heavy casualties and economic loss are generated, ensures coal mine production safety；Realize the effect for allowing pressure large deformation to the two-way reinforcing coal column of anchor cable is drawn；Solves the requirement commonly to drawing anchor cable not adapt to moment large deformation.
Description
Technical field
The utility model belongs to coal mine coal column support technology field, and in particular to it is a kind of reinforce coal column allow pressure large deformation pair
Draw anchor cable.
Background technique
Bump, also referred to as rock burst are a kind of flexible deformation potential energy built up in rock mass under certain condition unexpected violent
Strong release, the phenomenon that causing rock to burst and eject.Be often accompanied by coal and rock dish out, loud noise and phenomena such as blast.It has
Very big destructiveness is one of coal mine disaster.Bump genesis mechanism is sufficiently complex, and scholars propose by force in succession
Topology degree, rigidity theory, energy theory etc..Wherein strength theory thinks when stress reaches the strength degree of coal and rock, coal petrography
Body will rupture suddenly, form bump.Strength theory is considered as the necessary condition that bump occurs, rather than
Adequate condition.
It is stayed between adjacent two working face when current China's underground mine coal wall back production and sets protection pillar, coal pillar width
15-30m etc., by being found to the long-term observation with Burst Tendency mine, what microseismic event occurred within the scope of coal column
Frequency is higher, and unit area member impulse force directive property obviously concentrates on the crossheading of coal column and coal column two sides, therefore protects between working face
Coal column and crossheading are erosion control key areas.
Impact bring harm occurs to reduce coal column region, needs to improve the support pattern of reserved coal pillar.Usual manner
When reinforcing coal column using anchor cable, anchorage cable anchoring section uses resin anchoring agent, and after coal column pressure is crisp, anchorage cable anchoring power is greatly reduced, and adds
Gu effect is poor, roadway deformation is big；It can be found in country " patent retrieval and analysis " website: Authorization Notice No. CN201121521Y
" a kind of to drawing anchor cable " utility model patent, provides one kind to anchor cable is drawn, and this anchor cable can be applied to the supporting between coal column, but
It is that the anchor cable elongation percentage is low, is a kind of rigid protection, steel strand wires does not adapt to the moment large deformation of country rock under impact force action；Hair
Table was in " mechanical characteristic of Negative poisson's ratio anchor cable and its answering in Controlling of Coal Outburst in 2 months 2014 " coal journal "
With research " one kind is described in paper allows pressure large deformation anchor cable, mainly it is made of constant-resistance device, steel strand wires, pallet and lockset,
Middle constant-resistance device is Negative poisson's ratio material, and steel strand wires are common Poisson ratio material, which can keep the constant-resistance of 350kN
Power, elongation maximum can be more than that the stretching sliding deformation of 1000mm carrys out the impact large deformation of suitable for surrounding rock.The anchor cable realizes constant-resistance
Principle be frictional force that the opposite sliding in constant-resistance device between cone and casing generates, realize that the principle of large deformation is in constant-resistance device
The extreme displacement of casing is 1000mm.
Utility model content
For the studies above status and deficiency, the purpose of the utility model is to provide a kind of allowing for reinforcing coal column to press large deformation
To drawing anchor cable.The anchor cable construction is easy, realizes the stability of coal column under the conditions of impacting large deformation (2000mm) and makes pressure big
Deform the double action to the two-way reinforcing coal column of anchor cable is drawn.
The technical scheme adopted by the utility model is that:
It is a kind of reinforce coal column allow pressure large deformation to drawing anchor cable, this allows pressure large deformation to drawing anchor cable to wrap for reinforcing coal column
Include a steel strand wires, both ends arrangement two supporting plates, both ends arrangement two constant-resistance devices and both ends arrangement two allow pressure anchor
Rope lockset；Wherein,
Two pressure-release anchor cable locksets are respectively the first pressure-release anchor cable lockset and the second pressure-release anchor cable lockset, two constant-resistance devices point
Not Wei the first constant-resistance device and the second constant-resistance device, two supporting plates are respectively the first supporting plate and the second supporting plate, when use state, steel strand wires
The first pressure-release anchor cable lockset, the first constant-resistance device, the first supporting plate, coal column, the second supporting plate, the second constant-resistance device and second is sequentially passed through to allow
Press anchor cable lock.
The utility model, which further improves, to be, when use state, this allows pressure large deformation to drawing anchor cable to be arranged in coal column
On drilling in, and drill both ends be bore expanded hole area, respectively the first bore expanded hole area and the second bore expanded hole area.
The utility model, which further improves, to be, the both ends of steel strand wires extend out to the first pressure-release anchor cable lockset and respectively
0.5m on the outside of two pressure-release anchor cable locksets.
The utility model has the beneficial effects that:
The utility model provide it is a kind of reinforce coal column allow pressure large deformation to draw anchor cable, ensure coal column bump send out
After life when moment large deformation coal column stability, to drawing anchor cable both ends to install constant-resistance device, each constant-resistance device maximum extension amount is
1000mm, furthermore steel strand wires also have certain elastic extension amount according to length difference, to drawing anchor under conditions of guaranteeing constant-resistance
The elongation of rope is up to 2000mm or more；Avoid after impacting crossheading blocked by thorough closing, ventilation, personnel and equipment quilt
Coal body impact and burial, generate heavy casualties and economic loss, ensure coal mine production safety；It realizes and allows pressure large deformation to drawing anchor
The effect of Suo Shuanxiang reinforcing coal column；Solves the requirement commonly to drawing anchor cable not adapt to moment large deformation；The utility model can
It is widely used in the fields such as coal mine, metal mine, Tunnel Engineering.
Detailed description of the invention
Fig. 1 is utility model works face position view；
Fig. 2 is that the utility model allows pressure large deformation to drawing cable bolting cross-section diagram；
Fig. 3 is that the utility model allows pressure large deformation to drawing anchor cable schematic diagram；
Fig. 4 is that the utility model allows pressure large deformation to drawing cable bolting schematic enlarged-scale view.
In figure: 1- coal column；2- allows pressure large deformation to drawing anchor cable；3- drilling；4-1- the first pressure-release anchor cable lockset；4-1-
Two pressure-release anchor cable locksets；5-1- the first constant-resistance device；5-2- the second constant-resistance device；The first supporting plate of 6-1-；The second supporting plate of 6-2-；7-1-
First bore expanded hole area；The second bore expanded hole of 7-2- area；8- steel strand wires；9- upper curtate return airway；10- lower curtate working face
Crossheading.
Specific embodiment
The utility model is described further below in conjunction with drawings and examples.
Embodiment
A coal mine is constructed in reserved coal pillar allows pressure large deformation to anchor cable, 3 coal of A stope of coal mines is drawn, and 3 coal average thickness are 5m,
Flat seam, buried depth 500m or so, working face arrange two crossheadings, respectively adhesive tape crossheading and air return way.30104 work
Reserved coal pillar between face air return way and 30102 working face haulage gates, coal pillar width 20m.3 coals are accredited as weak Burst Tendency coal
Layer, the construction of coal column first advance a distance allow pressure large deformation to drawing anchor cable.
As shown in Figures 1 to 4, allowing for a kind of reinforcing coal column provided by the utility model presses large deformation to anchor cable is drawn, in coal
Using pressure large deformation is allowed to drawing anchor cable 2 to reinforce on column 1, allows and press large deformation to drawing anchor cable 2 to can adapt to coal column moment large deformation, protect
Amount of tension is 2000mm under conditions of demonstrate,proving constant-resistance；Described allows pressure large deformation to drawing anchor cable drilling both ends to need to carry out reaming, bores
Hole reaming district is located at 3 both ends of drilling；Described allows pressure large deformation to two supports for drawing anchor cable 2 to be arranged by a steel strand wires 8, both ends
Two pressure-release anchor cable locksets composition that plate, two constant-resistance devices of both ends arrangement, both ends are arranged, steel strand wires 8 sequentially pass through first and allow
Press anchor cable lock 4-1, the first constant-resistance device 5-1, the first supporting plate 6-1, coal column 1, the second supporting plate 6-2, the second constant-resistance device 5-2 and the
Two pressure-release anchor cable lockset 4-2.
It is a kind of reinforce coal column allow pressure large deformation to draw anchor cable construction method, its step are as follows:
1) prepare: being stayed in the middle part of 30102 working face haulage gate 9 of upper curtate and 30104 working face air return way 10 of lower curtate
If coal column 1, two crossheadings have been constructed and have been finished；
2) it drills: in 30102 working face haulage gate of upper curtate, 9 coal column side construction drill 3, drilling depth 20m, and it is right
Bore expanded hole construction, forms the first bore expanded hole area 7-1, and counter bore diameter is matched with length with constant-resistance device；
3) steel strand wires are installed: being inserted into the steel strand wires 8 of diameter 21.6mm, 21m long, 8 exposed length of steel strand wires in the borehole
0.5m；
4) to the installation of drawing anchor cable side: installing the first supporting plate in 30102 working face haulage gate of constant-resistance device upper curtate, 9 coal column side
The fixed steel strand wires 8 of 6-1, the first constant-resistance device 5-1, the first pressure-release anchor cable lockset 4-1,30102 working face haulage gate 9 of upper curtate
Work terminates；
5) to the installation of the drawing anchor cable other side: it constructs first to bore expanded hole in 30104 working face air return way 10 of lower curtate,
The second bore expanded hole area 7-2 is formed, counter bore diameter is matched with length with constant-resistance device.Then second supporting plate 6-2, second are successively installed
Constant-resistance device 5-2, the second pressure-release anchor cable lockset 4-2 of installation allow pressure large deformation to drawing anchor cable construction process pretightning force on steel strand wires 8
It is fully completed, can adapt to coal column moment large deformation, maximum deformation quantity 2000mm.
Claims (3)
1. a kind of reinforcing coal column allows pressure large deformation to drawing anchor cable, which is characterized in that this allows pressure large deformation to be used for drawing anchor cable (2)
It reinforces coal column (1), two constant-resistance devices of two supporting plates, both ends arrangement arranged including a steel strand wires (8), both ends and both ends
Two pressure-release anchor cable locksets of arrangement；Wherein,
Two pressure-release anchor cable locksets are respectively the first pressure-release anchor cable lockset (4-1) and the second pressure-release anchor cable lockset (4-2), two perseverances
Hindering device is respectively the first constant-resistance device (5-1) and the second constant-resistance device (5-2), and two supporting plates are respectively the first supporting plate (6-1) and second
Supporting plate (6-2), when use state, steel strand wires (8) sequentially pass through the first pressure-release anchor cable lockset (4-1), the first constant-resistance device (5-1),
First supporting plate (6-1), coal column (1), the second supporting plate (6-2), the second constant-resistance device (5-2) and the second pressure-release anchor cable lockset (4-2).
2. a kind of reinforcing coal column according to claim 1 allows pressure large deformation to drawing anchor cable, which is characterized in that use state
When, this makes pressure large deformation interior to the drilling (3) for drawing anchor cable (2) to be arranged on coal column (1), and the both ends of drilling (3) are drilling
Reaming district, respectively the first bore expanded hole area (7-1) and the second bore expanded hole area (7-2).
3. a kind of reinforcing coal column according to claim 1 allows pressure large deformation to drawing anchor cable, which is characterized in that steel strand wires
(8) both ends extend out to 0.5m on the outside of the first pressure-release anchor cable lockset (4-1) and the second pressure-release anchor cable lockset (4-2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820783358.XU CN208473911U (en) | 2018-05-24 | 2018-05-24 | It is a kind of reinforce coal column allow pressure large deformation to draw anchor cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820783358.XU CN208473911U (en) | 2018-05-24 | 2018-05-24 | It is a kind of reinforce coal column allow pressure large deformation to draw anchor cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208473911U true CN208473911U (en) | 2019-02-05 |
Family
ID=65218378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820783358.XU Active CN208473911U (en) | 2018-05-24 | 2018-05-24 | It is a kind of reinforce coal column allow pressure large deformation to draw anchor cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208473911U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685182A (en) * | 2021-08-10 | 2021-11-23 | 中国矿业大学 | Reuse method of retained anchor rods in gob-side entry driving coal pillar |
| US11771183B2 (en) | 2021-12-16 | 2023-10-03 | Joon Bu Park | Negative Poisson's ratio materials for fasteners |
-
2018
- 2018-05-24 CN CN201820783358.XU patent/CN208473911U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685182A (en) * | 2021-08-10 | 2021-11-23 | 中国矿业大学 | Reuse method of retained anchor rods in gob-side entry driving coal pillar |
| US11771183B2 (en) | 2021-12-16 | 2023-10-03 | Joon Bu Park | Negative Poisson's ratio materials for fasteners |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| He et al. | Longwall mining “cutting cantilever beam theory” and 110 mining method in China—The third mining science innovation | |
| Liu et al. | The position of hydraulic fracturing to initiate vertical fractures in hard hanging roof for stress relief | |
| Wang et al. | Case study on pressure-relief mining technology without advance tunneling and coal pillars in longwall mining | |
| Chen et al. | Study on repair control technology of soft surrounding rock roadway and its application | |
| CN104373145B (en) | Embedded classification constant-resistance shearing resistance large deformation anchor and method | |
| Liang et al. | Fracture evolution and pressure relief gas drainage from distant protected coal seams under an extremely thick key stratum | |
| Mark | Design of roof bolt systems | |
| CN111305876A (en) | Deep roadway anchoring-splitting grouting-hydraulic fracturing pressure relief cooperative control method | |
| CN208473911U (en) | It is a kind of reinforce coal column allow pressure large deformation to draw anchor cable | |
| WO2022110615A1 (en) | Three-level prevention and control method for rock burst roadway | |
| CN109139092B (en) | One-hole multipurpose construction method for treating impact and gas disaster of deep-buried coal seam | |
| CN110344854B (en) | Roadway support method for high rock burst | |
| CN111425231B (en) | Long and short anchor cable coordinated energy absorption yielding device and construction method | |
| CN103939099A (en) | Method for controlling strong shock risk coal seam group rock burst | |
| Li et al. | Determination of working resistance based on movement type of the first subordinate key stratum in a fully mechanized face with large mining height | |
| Sun et al. | Deformation control of asymmetric floor heave in a deep rock roadway: A case study | |
| CN110306984A (en) | A kind of baseboard of coal mine roadway type Controlling of Coal Outburst method | |
| CN204457810U (en) | The two strong housing support system of soft-rock tunnel available buffer gradual change type | |
| Yang et al. | Optimization of face flexible bolting and grouting technology for longwall face support under difficult geological conditions | |
| Zhang et al. | Experimental study on floor failure of coal mining above confined water | |
| Ma et al. | Analysis on mechanism and key factors of surrounding rock instability in deeply inclined roadway affected by argillation and water seepage | |
| Sun et al. | Numerical simulation of the effect of coupling support of bolt-mesh-anchor in deep tunnel | |
| ZHU et al. | Prevention of rockburst by guide holes based on numerical simulations | |
| CN202832187U (en) | Hydraulic breaker type rotary drilling rig | |
| CN103215947A (en) | Novel freezing pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |