CN107401419A - A kind of coal-face physical simulation support with setting load - Google Patents
A kind of coal-face physical simulation support with setting load Download PDFInfo
- Publication number
- CN107401419A CN107401419A CN201710627991.XA CN201710627991A CN107401419A CN 107401419 A CN107401419 A CN 107401419A CN 201710627991 A CN201710627991 A CN 201710627991A CN 107401419 A CN107401419 A CN 107401419A
- Authority
- CN
- China
- Prior art keywords
- support
- face
- force
- coal
- physical simulation
- 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.)
- Granted
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 description 17
- 238000005065 mining Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 238000009412 basement excavation Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of coal-face physical simulation support with setting load, including support skeleton, bracket upright post, force-measuring sensing system and display table；Support skeleton includes base, connecting rod, shielding plate and top backplate；Force-measuring sensing system is fixed on the base in support skeleton；Force cell system is electrically connected by signal transmssion line with display table；Bracket upright post is length-adjustable telescopic column, and the lower end of bracket upright post and the upper face of force-measuring sensing system are fixed, and the lower surface of the upper end of bracket upright post and the top backplate of support skeleton is fixed.Physical simulation support provided by the invention with setting load can improve test accuracy, can more realistically model engineering scene, realize the reliability of result.
Description
Technical field
The invention belongs to physical simulation experimental rig field, more particularly to a kind of coal-face with setting load
Physical simulation support.
Background technology
Hydraulic support is the capital equipment for ensureing stope (such as coal face) safety and upkeep operation space, and research support closes
The working resistance of reason and the type selecting of " support-country rock " relation pair hydraulic support have great importance.Physical simulation is tested
It is mining engineering research mine pressure and support load is effective and one of reliable means.Experiment uses and actual rock stratum physical force
The similar material of property is learned, by rational proportioning, according to the prototype actually exploited, it then follows certain scale smaller makes experiment
Model.Further according to situation about actually exploiting, excavated in a model, simulate the actual work such as propulsion or the roadway excavation of working face
Journey, while the data of record cast digging process medium-height trestle load, and situations such as corresponding observing and nursing formation damage and movement.Afterwards
Phase is analyzed result of the test, and the load that model support records is converted into the magnitude of load actually exploited according to formula, from
And reach simulation and actually exploit and realize the purpose of Support selection.
At present, model support does not have setting load, only pushing away with working face used by physical simulation experiment
Enter, when top plate occurs to destroy mobile, model support can just monitor the pressure on top plate, so the data of support load are present partially
Difference.In addition, after one circulation of excavation simulation, when carrying out shifting frame, it is impossible to drop post, the process of setting prop are realized, thus model support exists
Top top plate can be destroyed unavoidably when mobile, influence the accuracy of load.The load data of experiment gained support is related to engineering reality
The type selecting of hydraulic support in border, this is related to production safety, and closely bound up with adopting face investment.
In mining engineering, using physical simulation test carry out analog study when, also usually using model support come
The load of writing task face progradation medium-height trestle.However, model support can not realize the simulation to setting load, cause load
Record not accurate enough；In addition, when carrying out shifting frame after excavation simulation, because post can not drop in model support, top plate is caused when mobile
Infringement, load data is affected when excavating again, further influences the precision of experiment.Therefore, load record is that physics is similar
One of mostly important link in simulated test, success of the accurate load data to experiment have great importance.
To sum up, at present, the model support that physical simulation experiment uses mainly has the disadvantages that：
(1) do not have setting load.Each step model working face excavation before, due to model support can not setting prop, thus
Without setting load, now the active force very little between model support and top top plate, the situation with actually exploiting are not inconsistent.
(2) easily top plate is formed when moving frame and destroyed.When the model support in experiment moves frame at present, due to drop post can not be realized
Operated with setting prop etc., support can only be forcibly moved to working face wall, this is applied with artificial disturbance to top plate, destroys top plate
Structural form, influence it and be caving process, and legitimate reading has deviation.
(3) from the analysis of (1), (2), be present drawback in the model support used at present, thus arranged to later stage
Data and summary phenomenon bring difficulty.
Therefore, physical simulation experiment is not only required in similar to actual rock stratum on material, more will be in digging process power
The situation unification with actually exploiting is asked, thus model support is to be improved used by experiment.Upper according to this to analyze, model support carries
The record of lotus remains one of urgent problem to be solved in drawback, and simulated test.
The content of the invention
The purpose of the present invention is to overcome above-mentioned problems of the prior art, there is provided a kind of coal-getter with setting load
Make face physical simulation support, to improve test accuracy, more realistically model engineering is live, realizes the reliability of result.
The technical scheme is that：A kind of coal-face physical simulation support with setting load, including branch
Frame skeleton, bracket upright post, force-measuring sensing system and display table；The support skeleton includes base, connecting rod, shielding plate and top
Backplate, the base are fixedly connected with the lower end of connecting rod, and the upper end of connecting rod is fixedly connected with shielding plate, shielding plate and top backplate it
Between be connected, and push up backplate can adjust its position down in vertical direction；The force-measuring sensing system is fixed in support skeleton
Susceptor surface, force-measuring sensing system includes upper face, lower face and the force cell being fixed between upper and lower plate face,
The force cell is electrically connected by signal transmssion line with display table；The bracket upright post is length-adjustable telescopic column,
The lower end of bracket upright post and the upper face of force-measuring sensing system are fixed, under the upper end of bracket upright post and the top backplate of support skeleton
Surface is fixed；The bracket upright post includes head, screw rod, nut and sleeve, and the lower end of screw rod, screw rod are fixed in the head
Upper threaded coupling nut, the sleeve is socketed on the screw rod above nut, and nut forms upward support to sleeve；The head
Portion is welded on the upper face of force-measuring sensing system, and the upper end of the sleeve is welded in the lower surface of the top backplate of support skeleton；
The quantity of the bracket upright post is individual.
The upper face is located at the upper surface of force cell, and Upper gasket is provided between force cell；Under described
Plate face is located at the lower surface of force cell, and lower gasket is provided between force cell.
The display table includes housing, is provided with controller in housing, housing is provided with display screen；Force cell passes through letter
Number transmission line is electrically connected with the controller, and controller electrically connects with display screen.
The shielding plate and the specific attachment structure pushed up between backplate are：The both sides of the shielding plate upper end offer spiral shell
Hole, screw internal thread are connected with bolt, and the both sides of the top backplate are respectively equipped with the side guard plate perpendicular to top backplate plate face, side shield
Adjustment hole is offered on plate, the bolt is fastened through adjustment hole and with nut.
The chassis side of the support skeleton offers threading hole, and the signal transmssion line passes through the threading hole and display table
Electrical connection.
The force-measuring sensing system is sandwiched by two threaded rods being threadedly connected on support skeleton and is positioned at support
On intraskeletal base.
The shielding plate includes caving shield and the caving shield side on caving shield horizontal by angle shape, shielding plate
Backplate, the connecting rod are mutually fixed with caving shield；The top backplate and plane-parallel, top backplate include back timber and located at back timbers
On back timber backplate.
The connecting rod includes two groups of poles, and every group of pole includes two poles, and the base two side ends are respectively with one
The lower end of two poles of group pole is fixed, and the upper end of two poles is mutually fixed with the caving shield.
The controller is model OMRON CP1E-N20DR-D PLC or MSP430 single-chip microcomputers.
Beneficial effects of the present invention：In the embodiment of the present invention, there is provided a kind of coal-face physics phase with setting load
Like simulation support, the present invention includes following technological merit：
(1) support of the present invention has setting load, and the operating process for applying setting load is simple, can accurately reach model branch
The predetermined value of setting load needed for frame.
(2) when support of the present invention moves frame, the processes such as drop post, setting prop can be realized, the infringement to top plate is reduced, improves
The precision of result of the test.
(3) with actual exploitation situation more closely, result of the test is more credible.
(4) support operation principle of the present invention is easy-to-understand, and operating process is simple and convenient, and each several part component is relatively inexpensive and easy
In replacing.
To sum up, the physical simulation support provided by the invention with setting load, it is possible to increase test accuracy, more truly
Simulation engineering site, the reliability for realizing result, have the characteristics that it is accurate, conveniently, component it is simple.
Brief description of the drawings
Fig. 1 is the overall structure diagram of support of the present invention；
Fig. 2 is force cell system schematic；
Fig. 3 is force cell top panel projecting end force diagram；
Fig. 4 is that the display of the present invention represents to be intended to；
Fig. 5 is the bracket upright post schematic diagram of the present invention；
Fig. 6 is the support skeleton of the present invention；
Fig. 7 is the partial enlarged drawing of junction between shielding plate and the side guard plate for pushing up backplate plate face.
Description of reference numerals：1st, support skeleton；2nd, bracket upright post；3rd, force-measuring sensing system；4th, table is shown；5th, threaded rod；
6th, side guard plate；1-1, shielding plate；1-2, connecting rod；1-3, base；1-4, top backplate；1-5, bolt；1-6, nut；1-7, regulation
Hole；2-1, head；2-2, screw rod；2-3, nut；2-4, sleeve；3-1, force cell；3-2, top panel；3-3, Upper gasket；
3-4, signal transmssion line；3-5, lower panel；3-6, lower gasket.
Embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection domain do not limited by embodiment.
Referring to Fig. 1, the embodiments of the invention provide a kind of coal-face physical simulation support with setting load,
Including support skeleton 1, bracket upright post 2, force-measuring sensing system 3 and display table 4；The support skeleton 1 includes base 1-3, connected
Bar 1-2, shielding plate 1-1 and top backplate 1-4, the base 1-3 are fixedly connected with connecting rod 1-2 lower end, connecting rod 1-2 upper end
It is fixedly connected with shielding plate 1-1, is connected between shielding plate 1-1 and top backplate 1-4, and top backplate 1-4 can be in vertical direction
Lower its position of regulation；Base, connecting rod and shielding plate 1-1 connect into stable three-legged structure.The force-measuring sensing system 3 is fixed on
Base 1-3 surfaces in support skeleton 1, force-measuring sensing system 3 include upper face 3-2, lower face 3-5 and are fixed on upper and lower
Force cell 3-1 between plate face 3-2,3-5, the force cell 3-1 are electrically connected by signal transmssion line and display table 4
Connect；The bracket upright post 2 is length-adjustable telescopic column, the lower end of bracket upright post 2 and the upper face 3- of force-measuring sensing system 3
2 are fixed, and the upper end of bracket upright post 2 and the top backplate 1-4 of support skeleton 1 lower surface are fixed.
The bracket upright post 2 includes head 2-1, screw rod 2-2, nut 2-3 and sleeve 2-4, and the head 2-1 is fixed on
Screw rod 2-2 lower end, the sleeve 2-4 is socketed on the screw rod 2-2 above threaded coupling nut 2-3 on screw rod 2-2, nut 2-3,
And nut 2-3 forms upward support to sleeve 2-4；The head 2-1 is welded on the upper face 3-2 of force-measuring sensing system 3,
The upper end of the sleeve 2-4 is welded in the top backplate 1-4 of support skeleton 1 lower surface；The quantity of the bracket upright post 2 is 2.
The upper face 3-2 is located at force cell 3-1 upper surface, and upper pad is provided between force cell 3-1
Piece 3-3；The lower face 3-5 is located at force cell 3-1 lower surface, and lower gasket is provided between force cell 3-1
3-6。
The force-measuring sensing system is to utilize resistance strain weighing transducer principle, and upper face is set to vacantly tie with lower face
Structure, its purpose is to the system to produce elastic deformation under the effect of the pressure, the foil gauge of sensor elastomer is sent out therewith
Raw deformation, causes the change of resistance, so as to export the electric signal with pressure linear proportional；Upper and lower plate face, pad and sensor
Between be to be welded and fixed.
The display table 4 includes housing, is provided with controller in housing, housing is provided with display screen；Force cell 3-1 leads to
Cross signal transmssion line to be electrically connected with the controller, controller electrically connects with display screen.
The shielding plate 1-1 and the specific attachment structure pushed up between backplate 1-4 are：The both sides of the shielding plate 1-1 upper ends
Screw is offered, screw internal thread is connected with bolt 1-5, and the both sides of the top backplate 1-4 are respectively equipped with perpendicular to top backplate 1-4
The side guard plate 6 of plate face, adjustment hole 1-7, the bolt 1-5 are offered on side guard plate 6 through adjustment hole 1-7 and tight with nut 1-6
Gu.The adjustment hole 1-7 is extended in longitudinal direction, for adjusting top backplate 1-4 height, concrete structure in vertical direction
Connected mode enlarged drawing as shown in fig. 7, top backplate 1-4 can be freely lifted, vertical direction displacement not by shielding plate 1-1 influenceed.
The base 1-3 sides of the support skeleton 1 offer threading hole, and the signal transmssion line is by the threading hole with showing
Show that table 4 electrically connects.
The force-measuring sensing system 3 is sandwiched by two threaded rods being threadedly connected on support skeleton 15 and is positioned at branch
On base 1-3 in frame skeleton 1.
The shielding plate 1-1 includes caving shield and covering on caving shield horizontal by angle shape, shielding plate 1-1
Guard beam side guard plate, the connecting rod 1-2 mutually fix with caving shield；The top backplate 1-4 and plane-parallel, top backplate 1-4 include
Back timber and the back timber backplate on back timber.
The connecting rod 1-2 includes two groups of poles, and every group of pole includes two poles, the base 1-3 two side ends point
Lower end not with two poles of one group of pole is fixed, and the upper end of two poles is mutually fixed with the caving shield, two branch
It is not parallel between bar, and the distance between two pole upper ends are less than the distance between their lower end.
The controller is model OMRON CP1E-N20DR-D PLC or MSP430 single-chip microcomputers.
(1) the specific introduction of each part of the invention：
1) force-measuring sensing system
A, force cell system principle：In model working face digging process, under top panel can be transmitted by top top plate
The pressure come, and the A ends of sensor are passed to by Upper gasket, the foil gauge for being now pasted onto sensor elastomer produces therewith
Deformation, so as to cause the change of resistance, make the bridge circuit disequilibrium of resistance strain gage composition, output one and pressure into line
The electric signal of property direct ratio, electric signal can be transmitted by transmission line 4.
B, form：Force cell system is mainly made up of force cell, upper and lower panel, upper lower gasket and transmission line.
C, act on：Top roof pressure is perceived, and is converted into electric signal output.
D, parameter：Force cell system major parameter is shown in Table 1：
The force cell system major parameter of table 1
E, the Stren gsth test of component：
Force cell system is easiest to that failure by shear (Fig. 2) occurs at a of top panel, if the load foot that top applies
When enough greatly, more than the shearing strength of top panel, then failure by shear may occur at a, thus school is carried out to the intensity of component
Test, to ensure its reliability used.
Its stress is analyzed, as shown in Figure 3 as research object in the part to be overhang using top panel.
Assuming that the uniform stand under load of top panel, considers the overload capacity 150% of sensor, takes the maximum situation of top roof pressure
(the 150% of transducer range), to overhanging part, uniform load is：
By equilibrium equation Σ Fy=0, try to achieve：
Wherein, F is the range of sensor；FsFor the shearing at top panel a；ldFor the length of Upper gasket；lmFor top panel
Length；M is constraint couple.
By F=100N, lm=0.08m；ld=0.03m brings formula (2) into and can obtained：
Fs=93.75N
Section shearing stress is：
Bringing data into can obtain：
In formula, τ is section shearing stress；A is shear surface area at a；[τ] is allowable shear stress.
It follows that force cell system meets intensity requirement, will not destroy.
2) table is shown
Such as Fig. 4, display table connects with the transmission line of force cell, the electric signal that sensor exports is shown, i.e.,
The pressure size that top top plate is transmitted, unit kg can be read on dial plate.
3) bracket upright post
Bracket upright post is as shown in Figure 5.
A, principle：By nut on screw rod, the diameter dimension of sleeve should meet to be enclosed on screw rod, and and can is placed in spiral shell
On mother.When the downward precession of nut, sleeve declines therewith, now simulates the drop post process of support；When nut screws out upwards, sleeve
Rise therewith, now simulate the setting prop process of support.It is achieved thereby that reach the purpose of support setting load by adjusting nut.
B, form：Model support column is mainly made up of bolt (head, screw rod), nut and sleeve.
C, act on：Transmit the pressure of frame upper；Support drop post and setting prop process can be realized.
D, parameter：The major parameter of bracket upright post component is shown in Table 2：
The major parameter of the bracket upright post of table 2
E, component strength, stable and rigidity verification：
Because the top of sleeve is connected with set cap, the pressure of set cap transmission is born, it is annular steel to consider it
Pipe, it is component the weakest in bracket upright post, thus the index such as intensity to sleeve verifies.
Be annular steel pipe between sleeve, thus by the component strength of the Axial-compression Column in steel construction principle, stably
And the Method for Checking of rigidity is verified：
Ith, Stren gsth test：The support strength of sleeve is determined by following formula：
In formula, σ is the support strength of sleeve；N is support pressure；A1For sleeve area of section.
Because the overload capacity of sensor is 150%, range 10kg, therefore：
N=150% × 10 × 10N=150N
Data are brought into formula (4), obtained：
In formula, f is sleeve compression strength design load, takes f=215MPa.
Therefore the intensity of sleeve meets to require.
IIth, stable verification：
If meeting formula (5), the monolithic stability of sleeve meets the requirements：
In formula,For the coefficient of stability.
Now need to determineWhen meeting formula (6),
Have：
In formula, λnFor dimensionless slenderness ratio；λ is the slenderness ratio of sleeve；fykFor the yield strength value of sleeve, f is takenyk=
235MPa；E is the modulus of elasticity of sleeve, takes E=206GPa；α1For coefficient, α1=0.65.
λ is determined by formula (8), (9) and (10)：
In formula, I be inertia away from；α=d/D；D is sleeve diameter, d=12mm；D is sleeve outer diameter D=15mm；μ is length
Factor, μ=0.7；L be sleeve length, l=20mm.
Bringing data into can try to achieve：λ=2.92, λn=0.031≤0.215.
Therefore：
Now,
Therefore sleeve meets stability requirement.
IIIth, rigidity verifies：
The rigidity of sleeve is verified with following formula：
λmax≤[λ] (11)
In formula, λmaxFor each axial maximum slenderness-ratio of sleeve, because sleeve is annular, λmax=λ=2.92；[λ] is appearance
Perhaps slenderness ratio, [λ]=150.
Formula (11) is obviously set up, therefore sleeve meets the requirement of rigidity.
To sum up, the design of bracket upright post meets to require.
4) support skeleton
Support skeleton is as shown in Figure 6.
A, principle：Based on actually exploiting the hydraulic support that uses, the demand of binding tests.Shielding plate is the shielding portion of support
Part, prevent the spoil of inbreak from scurrying into model support；Connecting rod connect base and superstructure；Base supports whole model support；Top
Backplate carries top rock stratum and prevents spoil from scurrying into.
B, form：Mainly it is made up of components such as shielding plate, connecting rod, base, top backplates.
C, act on：Simulate actual bracket profile, carry top strata structure, maintenance work space and accommodate sensor etc. its
His component.
D, the size of set cap is：Length × width x thickness=120mm × 80mm × 2mm.
E, Stren gsth test：Because the main body for simulating rack bearing is bracket upright post and force cell system, therefore it is not required to pair
The intensity of support skeleton is verified.
(2) connection and cooperation of each component of model support
As Fig. 1, the connection of each component are as follows with coordinating：
1) force cell system is interposed in the suitable position of bracket base, and fixed by bolt 1；
2) head of two model support columns is weldingly fixed on plate above force cell system, the upper end of sleeve
It is weldingly fixed on the downside of set cap；
3) transmission line of force cell system is stretched out by threading hole, and be connected with display table.
After the completion of model support combination as shown in Figure 1.
(3) processing of the scope of application and test data of model support
1) scope of application
The scope of application of model support, mould are determined according to the range of force cell in the height of model support and support
The height dimension for intending each component in support is shown in Table 3.
The height dimension of the model support of table 3
As seen from the above table, it is preliminary to judge there are following two usable conditions according to the height of model support：
A, using 1：50 likelihood ratio, situation of the simulation mining height in 3.0-3.5m；
B, using 1：100 likelihood ratio, situation of the simulation mining height in 6.0-7.0m.
For both the above situation, analysis is separately verified with reference to the range of force cell：
a：
αf1=5.3 × 10-6
In formula, αl1For geometric similarity ratio；αf1For force ratio；n1For a model support supporting area and an actual branch
Frame supporting area ratio；SModelFor model support supporting area (i.e. back timber area)；SIt is actualFor actual bracket supporting area；F1For mould
Type support can simulate the maximum load of actual hydraulic pressure support.
b：
αf2=6.7 × 10-7
In formula, αl2For geometric similarity ratio；αf2For force ratio；n2For a model support supporting area and an actual branch
Frame supporting area ratio；F2The maximum load of actual hydraulic pressure support can be simulated for model support.
According to mining Practice, mining height support load in 3.0-3.5m is respectively less than 10482kN, mining height branch in 6.0-7.0m
Frame load is respectively less than 20353kN.Thus, the hydraulic support when range ability of model support is satisfied by actually exploiting in the case of two kinds
Magnitude of load.Therefore patent of the present invention is applied to above-mentioned two situations.
2) processing of experimental data
a、1：50 likelihood ratio, simulation mining height 3.0-3.5m
It will show that meter reading is converted into the support load that simulation is actually exploited by formula (12)：
In formula, FaTo simulate the support load actually exploited；mReadTo show the reading of table.
b、1：100 likelihood ratio, simulation mining height 6.0-7.0m
It will show that meter reading is converted into the support load that simulation is actually exploited by formula (13)：
In formula, FbTo simulate the support load actually exploited.
(4) use of model support
1) after the working face open-off cut of physical simulation experiment, model support is put into simulation working face.
2) open and show table switch, click on " zero setting " button, the nut of bracket upright post is screwed out upwards sleeve is able to
Lifting, and by set cap and top top plate contact, now, there is pressure reading in display table, continues to screw out nut until aobvious
Untill showing that the reading of table reaches the size of the predetermined setting load of model support.
3) excavated surface, while mark record support load data by showing.
4) after the completion of model excavation step, following advancing process is carried out：
Post drops a,：The nut of downward precession bracket upright post declines sleeve, and now, set cap declines therewith, model branch
Frame separates with top plate；
Model support is moved to new working face wall b,；
C, setting prop：Repeat step 2) and 3) carry out the digging process of a new step.
5) after all excavation terminates after model, model support is gently taken out, and closes display table switch.
6) hydraulic support magnitude of load when load data being converted into engineering actual exploitation by formula (12) or (13), it is whole
Reason data are simultaneously analyzed, and are finally drawn a conclusion.
In summary, a kind of coal-face physical simulation support with setting load provided by the invention, including
Following technological merit：
(1) support of the present invention has setting load, and the operating process for applying setting load is simple, can accurately reach model branch
The predetermined value of setting load needed for frame.
(2) when support of the present invention moves frame, the processes such as drop post, setting prop can be realized, the infringement to top plate is reduced, improves
The precision of result of the test.
(3) with actual exploitation situation more closely, result of the test is more credible.
(4) support operation principle of the present invention is easy-to-understand, and operating process is simple and convenient, and each several part component is relatively inexpensive and easy
In replacing.
To sum up, the physical simulation support provided by the invention with setting load, it is possible to increase test accuracy, more truly
Simulation engineering site, the reliability for realizing result, have the characteristics that it is accurate, conveniently, component it is simple.
Disclosed above is only several specific embodiments of the present invention, and still, the embodiment of the present invention is not limited to this, is appointed
What what those skilled in the art can think change should all fall into protection scope of the present invention.
Claims (9)
- A kind of 1. coal-face physical simulation support with setting load, it is characterised in that including support skeleton (1), Bracket upright post (2), force-measuring sensing system (3) and display table (4)；The support skeleton (1) includes base (1-3), connecting rod (1-2), shielding plate (1-1) and top backplate (1-4), the bottom Seat (1-3) is fixedly connected with the lower end of connecting rod (1-2), and the upper end of connecting rod (1-2) is fixedly connected with shielding plate (1-1), screens plate It is connected between (1-1) and top backplate (1-4), and push up backplate (1-4) its position can be adjusted down in vertical direction；Base (1-3) surface that the force-measuring sensing system (3) is fixed in support skeleton (1), force-measuring sensing system (3) include Upper face (3-2), lower face (3-5) and the force cell (3-1) being fixed between upper and lower plate face (3-2,3-5), it is described Force cell (3-1) is electrically connected by signal transmssion line with display table (4)；The bracket upright post (2) is length-adjustable telescopic column, lower end and the force-measuring sensing system (3) of bracket upright post (2) Upper face (3-2) is fixed, and the upper end of bracket upright post (2) and the lower surface of the top backplate (1-4) of support skeleton (1) are fixed；The bracket upright post (2) includes head (2-1), screw rod (2-2), nut (2-3) and sleeve (2-4), the head (2- 1) it is fixed on screw rod (2-2) lower end, threaded coupling nut (2-3) on screw rod (2-2), the screw rod (2-2) above nut (2-3) The upper socket sleeve (2-4), and nut (2-3) forms upward support to sleeve (2-4)；The head (2-1) is welded in On the upper face (3-2) of force-measuring sensing system (3), the upper end of the sleeve (2-4) is welded in the top backplate of support skeleton (1) The lower surface of (1-4)；The quantity of the bracket upright post (2) is 2.
- A kind of 2. coal-face physical simulation support with setting load as claimed in claim 1, it is characterised in that The upper face (3-2) is located at the upper surface of force cell (3-1), and Upper gasket is provided between force cell (3-1) (3-3)；The lower face (3-5) is located at the lower surface of force cell (3-1), and is provided between force cell (3-1) Lower gasket (3-6).
- A kind of 3. coal-face physical simulation support with setting load as claimed in claim 1, it is characterised in that The display table (4) includes housing, is provided with controller in housing, housing is provided with display screen；Force cell (3-1) passes through letter Number transmission line is electrically connected with the controller, and controller electrically connects with display screen.
- A kind of 4. coal-face physical simulation support with setting load as claimed in claim 1, it is characterised in that The shielding plate (1-1) and the specific attachment structure pushed up between backplate (1-4) are：Open the both sides of described shielding plate (1-1) upper end Provided with screw, screw internal thread is connected with bolt (1-5), and the both sides of the top backplate (1-4) are respectively equipped with perpendicular to top backplate The side guard plate (6) of (1-4) plate face, adjustment hole (1-7) is offered on side guard plate (6), the bolt (1-5) passes through adjustment hole (1- 7) and with nut (1-6) fasten.
- A kind of 5. coal-face physical simulation support with setting load as claimed in claim 1, it is characterised in that Base (1-3) side of the support skeleton (1) offers threading hole, and the signal transmssion line passes through the threading hole and display table (4) electrically connect.
- A kind of 6. coal-face physical simulation support with setting load as claimed in claim 1, it is characterised in that The force-measuring sensing system (3) is sandwiched by two threaded rods being threadedly connected on support skeleton (1) (5) and is positioned at support On base (1-3) in skeleton (1).
- A kind of 7. coal-face physical simulation support with setting load as claimed in claim 1, it is characterised in that The shielding plate (1-1) includes caving shield and the caving shield on caving shield horizontal by angle shape, shielding plate (1-1) Side guard plate, the connecting rod (1-2) are mutually fixed with caving shield；The top backplate (1-4) and plane-parallel, top backplate (1-4) bag Include back timber and the back timber backplate on back timber.
- A kind of 8. coal-face physical simulation support with setting load as claimed in claim 7, it is characterised in that The connecting rod (1-2) includes two groups of poles, and every group of pole includes two poles, base (1-3) two side ends respectively with The lower end of two poles of one group of pole is fixed, and the upper end of two poles is mutually fixed with the caving shield.
- A kind of 9. coal-face physical simulation support with setting load as claimed in claim 3, it is characterised in that The controller is model OMRON CP1E-N20DR-D PLC or MSP430 single-chip microcomputers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710627991.XA CN107401419B (en) | 2017-07-28 | 2017-07-28 | A kind of coal working face physical simulation bracket with setting load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710627991.XA CN107401419B (en) | 2017-07-28 | 2017-07-28 | A kind of coal working face physical simulation bracket with setting load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107401419A true CN107401419A (en) | 2017-11-28 |
| CN107401419B CN107401419B (en) | 2019-09-10 |
Family
ID=60401198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710627991.XA Active CN107401419B (en) | 2017-07-28 | 2017-07-28 | A kind of coal working face physical simulation bracket with setting load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107401419B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339843A (en) * | 2018-09-05 | 2019-02-15 | 安徽理工大学 | A kind of support running gear excavated suitable for analog simulation coal rock layer |
| CN109707418A (en) * | 2019-03-08 | 2019-05-03 | 安徽理工大学 | Mine presses the simulation bracket of similarity simulation experiment measurement roof pressure |
| CN110566258A (en) * | 2019-08-22 | 2019-12-13 | 天地科技股份有限公司 | Support model for simulating fully mechanized caving mining of coal mine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1469168A1 (en) * | 1986-11-10 | 1989-03-30 | Всесоюзный научно-исследовательский и проектно-конструкторский угольный институт "КузНИУИ" | Bed for investigating the interaction of power support with loose roof through canopy |
| CN102261972A (en) * | 2011-04-19 | 2011-11-30 | 中国矿业大学(北京) | Experimental platform for relation between mining fully-mechanized support and surrounding rocks |
| CN102866032A (en) * | 2012-09-27 | 2013-01-09 | 安徽理工大学 | Similar material simulation test system |
| CN104807666A (en) * | 2015-05-15 | 2015-07-29 | 安徽理工大学 | Experimental device based on coal face timbering and dynamic moving frame simulation |
| CN205400782U (en) * | 2016-03-18 | 2016-07-27 | 西安科技大学 | A two column type hydraulic support for similar material simulation experiment |
-
2017
- 2017-07-28 CN CN201710627991.XA patent/CN107401419B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1469168A1 (en) * | 1986-11-10 | 1989-03-30 | Всесоюзный научно-исследовательский и проектно-конструкторский угольный институт "КузНИУИ" | Bed for investigating the interaction of power support with loose roof through canopy |
| CN102261972A (en) * | 2011-04-19 | 2011-11-30 | 中国矿业大学(北京) | Experimental platform for relation between mining fully-mechanized support and surrounding rocks |
| CN102866032A (en) * | 2012-09-27 | 2013-01-09 | 安徽理工大学 | Similar material simulation test system |
| CN104807666A (en) * | 2015-05-15 | 2015-07-29 | 安徽理工大学 | Experimental device based on coal face timbering and dynamic moving frame simulation |
| CN205400782U (en) * | 2016-03-18 | 2016-07-27 | 西安科技大学 | A two column type hydraulic support for similar material simulation experiment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339843A (en) * | 2018-09-05 | 2019-02-15 | 安徽理工大学 | A kind of support running gear excavated suitable for analog simulation coal rock layer |
| CN109707418A (en) * | 2019-03-08 | 2019-05-03 | 安徽理工大学 | Mine presses the simulation bracket of similarity simulation experiment measurement roof pressure |
| CN110566258A (en) * | 2019-08-22 | 2019-12-13 | 天地科技股份有限公司 | Support model for simulating fully mechanized caving mining of coal mine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107401419B (en) | 2019-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102866241B (en) | Three-directionally-loaded large-scale three-dimensional similarity simulation test method | |
| Zhang et al. | Borehole stress monitoring analysis on advanced abutment pressure induced by longwall mining | |
| CN109269900B (en) | Stratum simulation and loading test device for multi-ring shield tunnel structure | |
| CN107401419A (en) | A kind of coal-face physical simulation support with setting load | |
| CN106501014A (en) | Vertical load testing machine for domain tunnel structure | |
| CN205538954U (en) | Three -dimensional simulation test device of coal seam group exploitation | |
| CN105092816A (en) | Three-dimensional multi-coal-seam-mining similar material model experimental system | |
| CN202420725U (en) | Dynamometry support model for physical similarity simulation experiment | |
| CN207245740U (en) | A kind of physical simulation stent with setting load | |
| CN103018105B (en) | Simulation experiment platform of compacting system of solid-filling coal mining solid material | |
| Yang et al. | An evaluation of longwall face stability in thick coal seams through a basic understanding of shield–strata interaction | |
| CN105043852B (en) | A kind of function loading device tested suitable for mine laneway analog simulation | |
| CN205642868U (en) | Two -way load combined action capability test device of herringbone post node | |
| CN204575356U (en) | A kind of based on coal-face supporting and the experimental provision moving frame dynamic similation | |
| CN105527403A (en) | Analog simulation test device for coal and rock masses and test method | |
| CN107941614A (en) | A kind of rock fracture creep test system | |
| CN210720389U (en) | Tunnel excavation process analogue test device | |
| CN103760096A (en) | Lateral pressurizing similar stimulation experiment device and experiment method | |
| Zhou et al. | Development of a novel resilient anchor cable and its large shear deformation performance | |
| Xiao-ling et al. | Model test study on horizontal bearing behavior of pile under existing vertical load | |
| CN105606456A (en) | Test device and test method for simulating mechanics characteristic of surrounding rock on top plate of deep repository | |
| CN106979888A (en) | Study the test apparatus and test method of ore pillar digging process obturation carrying mechanism | |
| CN204330494U (en) | A kind of experimental provision for testing gob-side entry retaining stability | |
| Wu et al. | A new experimental system for quantifying the multidimensional loads on an on-site hydraulic support in steeply dipping seam mining | |
| CN205477757U (en) | Signal post dead zone pressure displacement monitoring alarm system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |