CN103500528A - Simulation system model for demonstrating coal mining and roof dynamic changes - Google Patents
Simulation system model for demonstrating coal mining and roof dynamic changes Download PDFInfo
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- CN103500528A CN103500528A CN201310432128.0A CN201310432128A CN103500528A CN 103500528 A CN103500528 A CN 103500528A CN 201310432128 A CN201310432128 A CN 201310432128A CN 103500528 A CN103500528 A CN 103500528A
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Abstract
The invention discloses a simulation system model for demonstrating coal mining and roof dynamic changes. The simulation system model for demonstrating the coal mining and the roof dynamic changes comprises a masonry beam module, an immediate roof module, a first false roof module (6), a coal bed module (7), a baffle (8) and an air bag (9), wherein the masonry beam module is composed of a first masonry beam module (2), a masonry beam body (1) and a second masonry beam module (3); the immediate roof module comprises a first immediate roof module (4) for supporting the first masonry beam module (2), and at least four second immediate roof modules (5); the first false roof module (6) and the coal bed module (7) are used for supporting the first immediate roof module (4); the baffle (8) is used for supporting the rear parts of the second immediate roof modules (5) and is lower than the coal bed module (7); the air bag (9) is placed in a containing cavity formed by the baffle (8), the second immediate roof modules (5) and the coal bed module (7). The simulation system model for demonstrating the coal mining and the roof dynamic changes can dynamically demonstrate the coal mining and the roof structural changes, is easy to manufacture, is high in operability and can demonstrate circularly.
Description
Technical field
The present invention relates to the visual ore deposit of a kind of coal mining pressure and manifest the comprehensive simulating model, especially be applicable to the teaching demonstration of roof structure dynamic changing process in coal mining.
Background technology
In coal industry teaching, production and scientific research activity, ore deposit is pressed and is manifested the core that activity is research, and the roof structural change is the important content of all researchs, for make the down-hole complexity again invisible top board structure change and allow everyone understand, main method is the static schematic diagram of structure and the Structural Static states model of making top board at present.But these class methods can't be illustrated ore deposit and press the process manifested; Few electric automatization model not only is difficult to reappear the concrete change procedure of top board, involves great expense simultaneously, is easy to damage etc.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the existing ore deposit of illustrating to press the shortcoming manifested with the top board structure variation model, and what a kind of simple in structure, easy and simple to handle, circulation demonstrating was provided illustrates that top board structure changes and ore deposit presses the comprehensive simulating model that state manifests.
A kind of Simulation Model of demonstrating the dynamic change of seam mining top board, comprise and comprise successively from bottom to up coal seam module, false roof module, immediate roof module and masonry beam module;
Described masonry beam module consists of the first masonry beam module, masonry beam main body and the second masonry beam module, wherein, the bottom-hinged of described masonry beam main body and described the first masonry beam module, hinged with the top of described the second masonry beam module;
Described immediate roof module comprises the first immediate roof module and at least 4 the second immediate roof modules, wherein, the bottom-hinged of first described second immediate roof module and the first immediate roof module, the bottom-hinged of described the second immediate roof module of front portion previous described second immediate roof module with it, the top of described the second immediate roof module of rear portion previous described second immediate roof module with it is hinged;
Described false roof module comprises the first false roof module and two described the second false roof modules;
Bottom in described the second immediate roof module of rear portion is provided with baffle plate, and its height is lower than described coal seam module;
Air bag, be placed in holding in cavity of forming between described baffle plate, described the second immediate roof module and coal seam module, and the height after described airbag aeration equals described false roof module and described coal seam module sum.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, fix by cementing agent between wherein said coal seam module, described the first false roof module, described the first immediate roof module and described the first masonry beam module;
Also be provided with hydraulic module near module place, described coal seam in described spatial accommodation, in the bottom of described the second masonry beam module, also be provided with the spoil module; Described masonry beam module is made by the PVC material, described immediate roof module is made by plastic foam, described the first false roof module is made by timber or PVC material, two described the second false roof modules are made by having flexible deformable material, one of them is fixed on module top, described coal seam, be positioned at the bottom of the 1st described the second immediate roof module, another described second false roof module is fixed on described hydraulic module.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, wherein said the first immediate roof module, length be less than described the first masonry beam module,, and be greater than the length of described the first false roof module, the length of described coal seam module is greater than described the first masonry beam module, the length sum of a plurality of described the second immediate roof modules is greater than the length of described masonry beam main body, and the height of described hydraulic module is with the height of described coal seam module.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, wherein said the second immediate roof module is 7, wherein, the bottom-hinged of the 1st described the second immediate roof module and described the first immediate roof module from left to right, the bottom-hinged of 2nd～5 described the second immediate roof modules previous described second immediate roof module with it, the 6th and the top of 7 described the second immediate roof modules previous described second immediate roof module with it hinged; Described baffle plate is arranged at the bottom of the 7th described the second immediate roof module.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, wherein said air bag comprises utricule and snorkel, be provided with the inflation/deflation switch at the described snorkel place near described utricule,, support described a plurality of described the second immediate roof module and the first immediate roof module and draw a straight line and be horizontal during in inflated condition when described air bag; Described air bag is two, and the venting of two air bags means the exploitation to coal seam.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, the difference of the length of wherein said coal seam module and described the first false roof module is L
1, the difference of the length of described the first false roof module and described the first immediate roof module is L
2, the difference of the length of described the first immediate roof module and described the first masonry beam module is L
3;
Described L1 calculates by following formula:
L
1poor for the length of coal seam module and described the first false roof module, m;
S is face length, m;
ω is contrast factor, i.e. the scale down of model;
H is dark for adopting, m;
N is the main roof number;
K is factor of stress concentration;
M
ifor main roof thickness, m;
C is the main roof First Weighting Interval of Main, m;
A is abutment pressure peak positional distance rib distance, m;
The distance A of described abutment pressure peak positional distance rib calculates by following formula:
T is immediate roof rock stratum height, m;
P is old rimrock layer height, m;
Wherein, L
b=2L
1+ S+2B
B＝H·cotθ
θ is the strike angle of critical deformation.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, tri-points of minimum point C1 of the sidewall of the minimum point B1 of the sidewall of the minimum point A1 of the sidewall of the close goaf of wherein said the first false roof module one side, the close goaf of described the first immediate roof module one side and the close goaf of described the first masonry beam module one side are all on same ellipse, and elliptic equation is as follows:
Place, the bottom surface straight line of described the first false roof module is the x axle, and the distance of the described A1 of initial point distance is 260cm,
L2 and L3 calculate by the following method:
Bring the height value of described the first false roof module into described elliptic equation, the absolute value of the x coordinate value difference at the x coordinate figure obtained and A1 point place is L2;
The value that the height addition of described the first false roof module and described the first immediate roof is obtained is brought described elliptic equation into, and the absolute value of the x coordinate value difference at the x coordinate figure obtained and B1 point place is L3.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, the height of wherein said spoil module and described baffle plate adopts following formula to calculate:
H
cash=k* (η h+h
1+ h
2)
H
gear=k* (η h+h
1)
H
cashfor the accumulative total height of spoil, cm;
H
gearfor height of baffle plate, cm;
K is broken expansion factor, generally gets 1.3;
η is the coal residual coefficients, generally gets 0.2;
H is thickness of coal seam, cm;
H
1be the first false roof module height, cm;
H
2for immediate roof module height, cm.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, wherein also comprise the model casing that holds described model, and it is made by transparent material; Described hinged finger is connected by hinge.
The Simulation Model of demonstration seam mining top board of the present invention dynamic change, wherein, ω is 0.024, described model casing is of a size of 110cm * 20cm * 60cm; Described coal seam module is of a size of 35cm * 18cm * 12cm; Described the first false roof module size is 20cm * 18cm * 5cm, described immediate roof module height is 8cm, by 1 the first immediate roof module and 7 the second immediate roof module that are of a size of 8cm * 18cm * 8cm that are of a size of 20.2cm * 18cm * 8cm, formed, described the first masonry beam module is of a size of 21.3cm * 18cm * 22cm, and described masonry beam size of main body is 54cm * 18cm * 22cm; Described the second masonry beam module is of a size of 18cm * 18cm * 22cm; The long 18cm of described air bag, diameter 17cm; Described baffle dimensions is 4cm * 18cm * 9.6cm; The height of described spoil module is 9.6cm.
The Simulation Model difference from prior art that the present invention demonstrates the dynamic change of seam mining top board is: the present invention is by the variation of top board structure during reality is produced, the teaching demonstration of the Simulation Model of a set of demonstration seam mining top board dynamic change for coal mining roof structure dynamic changing process is provided, there is following advantage:
One, can dynamically demonstrate seam mining and top board structure changes;
Two, affected simple, workable;
Three, circulation demonstrating.
Simulation Model below in conjunction with accompanying drawing to demonstration seam mining top board of the present invention dynamic change is described further.
The accompanying drawing explanation
Fig. 1 be during reality is produced during working face mining top board structure change schematic diagram;
When the Simulation Model that Fig. 2 is demonstration seam mining top board of the present invention dynamic change is demonstrated working face mining, top board structure changes schematic diagram;
When the Simulation Model demonstration workplace that Fig. 3 is demonstration seam mining top board of the present invention dynamic change is unminded, top board structure changes schematic diagram;
The structural representation that Fig. 4 is air bag of the present invention;
The schematic diagram that Fig. 5 is the ellipse at each breakaway poing place in the reality exploitation;
The schematic diagram that Fig. 6 is the ellipse at each breakaway poing place in model of the present invention.
Embodiment
As Fig. 1 be during reality is produced during working face mining top board structure change schematic diagram, the present invention, by the variation of top board structure during reality is produced, provides the teaching demonstration of the Simulation Model of a set of demonstration seam mining top board dynamic change for coal mining roof structure dynamic changing process.
As shown in Figures 2 and 3, a kind of Simulation Model of demonstrating the dynamic change of seam mining top board of the present invention, comprise and comprise successively from bottom to up coal seam module 7, false roof module, immediate roof module and masonry beam module;
Described masonry beam module consists of the first masonry beam module 2, masonry beam main body 1 and the second masonry beam module 3, wherein, the bottom-hinged of described masonry beam main body 1 and described the first masonry beam module 2, hinged with the top of described the second masonry beam module 3;
Described backform piece comprises the first immediate roof module 4 and at least 4 the second immediate roof modules 5 for supporting described the first masonry beam module 2, described in the present embodiment, the second immediate roof module 5 is 7, concrete quantity can be adjusted according to demand, wherein, the bottom-hinged of the 1st described the second immediate roof module 5 and described the first immediate roof module 4, the bottom-hinged of 2nd～5 described the second immediate roof modules 5 previous described second immediate roof module 5 with it, the 6th and the top of 7 described the second immediate roof modules 5 previous described second immediate roof module 5 with it hinged;
Described false roof module comprises the first false roof module 6 and two described the second false roof modules 13;
For supporting the baffle plate 8 of described the second immediate roof module 5 of rear portion, its height is lower than described coal seam module 7;
The hinged hinged effect that can form for any device of the present invention, as hinge 14.
Between described coal seam module 7, described the first false roof module 6, described the first immediate roof module 4 and described the first masonry beam module 2, by cementing agent, fix; Also be provided with hydraulic module 12 near module 7 places, described coal seam in described spatial accommodation, be used for the hydraulic support of simulating reality in producing, bottom at described the second masonry beam module 3 also is provided with spoil module 10, the spoil bag of filling after simulation mining, make demonstration more press close to production practices, vivider lively.
The length of described the first immediate roof module 4 is less than described the first masonry beam module 2, and be greater than the length of described the first false roof module 6, the length of described coal seam module 7 is greater than described the first masonry beam module 2, the length sum of a plurality of described the second immediate roof modules 5 is greater than the length of described masonry beam main body 1, and the height of described hydraulic module 12 is with the height of described coal seam module 7.
Described masonry beam module is made by heavier material, as the PVC material, is subject to the self gravitation effect, while below described air bag 9 deflation status, there is no supporting power, forms " masonry beam " structure, when described air bag 9 inflations are restored, restored by below supporting power effect; Described immediate roof module is made by lighter material, as plastic foam, by a plurality of the second immediate roof modules 5, formed, by hinge 14, connected each other, except latter two link position up, hinge 14 link positions between all the other described second immediate roof modules 5 below, can be in the interlude bending, latter two the second immediate roof module 5 plays a supportive role, with broken swollen coefficient baffle plate 8, contacts, and can control immediate roof module largest amount of subsidence.Described the first false roof module 6 is made by harder material, and for example timber or PVC material, need bear all module weight in top; Described the second false roof module is made by deformable resilient material, as sponge, one of them is fixed on module top, described coal seam, is positioned at the bottom of the 1st described the second immediate roof module 5, and another described second false roof module 13 is fixed on described hydraulic module 12.In the present embodiment, described baffle plate 8 is arranged at the bottom of the 7th described the second immediate roof module 5.Described system model also comprises the model casing 11 that holds described model, and it is made by transparent material, plays the effect of protection model, simultaneously also convenient transportation.
Described air bag 9 is two, as shown in Figure 4, described air bag 9 comprises utricule and snorkel 13, be provided with inflation/deflation switch 14 at described snorkel 13 places near described utricule, when described air bag during in inflated condition, supporting described a plurality of described the second immediate roof module 5 and the first immediate roof module 4 is linked to be a rectangular structure and is horizontal, the first masonry beam module 1 of described masonry beam module now, masonry beam main body 2 and the second masonry beam module 3 also are linked to be a large rectangular structure and in horizontality, in teaching demonstration, the top board structure in situation is unminded in the expression coal seam.After described air bag 9 is exitted, described masonry beam module and a plurality of described the second immediate roof module 5 have not had support, under the effect of gravity, cave in downwards, latter two described second immediate roof module 5 drops on described baffle plate 8, described the second masonry beam module 3 drops on described spoil module 10, be used for simulating the situation of change of top board after seam mining in teaching demonstration, simulation be the situation of Fig. 1 during reality is produced.In the present invention, coal seam module 7 means coal seam to be exploited, and what described air bag 9 meaned is the coal seam of exploiting, and after venting, exploited in expression coal seam herein, and two described air bag 9 deflation sequences have meaned the seam mining direction.
Described air bag 9 inflation/deflations all complete by inflation/deflation switch 14, and when air bag 9 means coal seam, when being full of gaseity, inflation/deflation switch 14 is in closure state; When air bag 9 means that coal seam means to exploit state, air bag starts venting, and inflation/deflation switch 14 starts to open; When the needs inflation recovers original state, inflation/deflation switch 14, first in open mode, utilizes inflator 9 inflations from snorkel 13 toward air bag, first Closing Switch while having inflated, then take inflator away.
Following account form is all that the concrete condition in producing with reality calculates actual numerical value scaled, obtains the specification of model various piece:
Described coal seam module 7 is L with the difference of the length of described the first false roof module 6
1, described the first false roof module 6 is L with the difference of the length of described the first immediate roof module 4
2, the difference of the length of described the first immediate roof module 4 and described the first masonry beam module 2 is L
3;
Described L1 calculates by following formula:
L
1poor for the length of coal seam module 7 and described the first false roof module 6, cm; S is face length, m; ω is contrast factor, i.e. the scale down of model; H is dark for adopting, m; N is the main roof number; K is factor of stress concentration; m
ifor main roof thickness, m; C is the main roof First Weighting Interval of Main, m; A is abutment pressure peak positional distance rib distance, m; The distance A of described abutment pressure peak positional distance rib calculates by following formula:
T is immediate roof rock stratum height, m; P is old rimrock layer height, m;
Wherein, L
b=2L
1+ S+2B
B＝H·cotθ
θ is the strike angle of critical deformation.
As shown in Figure 5, in the reality exploitation, first breakaway poing in the close goaf of false roof, immediate roof, masonry beam is all on same ellipse.Show it is also consistent on model of the present invention, as shown in Figure 6, tri-points of minimum point C1 of the sidewall of the minimum point B1 of the sidewall of the minimum point A1 of the sidewall of described the first false roof module 6 close goaf one sides, described the first immediate roof module 4 close goaf one sides and described the first masonry beam module 2 close goaf one sides are all on same ellipse, and elliptic equation is as follows:
Place, the bottom surface straight line of described the first false roof module 6 is the x axle, and the distance of the described A1 of initial point distance is 260cm,
L2 and L3 calculate by the following method:
Bring the height value of described the first false roof module 6 into described elliptic equation, the absolute value of the x coordinate value difference at the x coordinate figure obtained and A1 point place is L2;
The value that the height addition of described the first false roof module 6 and described the first immediate roof 4 is obtained is brought described elliptic equation into, and the absolute value of the x coordinate value difference at the x coordinate figure obtained and B1 point place is L3.
The height of described spoil module 10 and described baffle plate 8 adopts following formula to calculate:
H
cash=k* (η h+h
1+ h
2)
H
gear=k* (η h+h
1)
H
cashfor the accumulative total height of spoil, m; H
gearfor height of baffle plate, m; K is broken expansion factor; η is the coal residual coefficients; H is thickness of coal seam, m; h
1be the first false roof module height, m; h
2for immediate roof module height, m;
General thickness of coal seam is actual is 5m, in the present embodiment in model corresponding ratio (model scale down) be 0.024, calculate 12cm, the height ratio of modules is for summing up according to engineering experience, for making the modelling effect image, consider the suitable size of model, done correction and idealized hypothesis to a certain degree, and calculative determination is: described coal seam module 7 is highly highly that 8cm, described masonry beam module height are 22cm for 5cm, described immediate roof module height for 12cm, described the first false roof module 6.
The wide representative of modules be the length of workplace, consider the suitable size of model and do not affect in the situation of practical manifestation effect, the model reduced width is to 20cm, the modules reduced width is to 18cm, the safe distance of 1cm is respectively left in front and back, prevent that module and model casing 11 inwalls from producing friction, affects result of use.
In the present embodiment, S is 160m; ω is 0.024; H is 300m; N is 1; K is 3; m
ifor 9.1m; C is 32m; A is 35m; T is 4m; P is 9m; θ is 75 °, and the length of calculating thus L1 is 0.2cm;
As shown in Figure 5, place, the bottom surface straight line of described the first false roof module 6 is the x axle, the distance of the described A1 of initial point distance is 260cm, be that the A1 coordinate is (260,0), immediate roof breaking part base point height value is brought into, what bring into is the height value of false roof module, draws the B1 coordinate for (259.8,5), illustrate that the difference between the first false roof module 6 and immediate roof is 0.2cm, in like manner, show that the C1 coordinate is for (258.7,13), illustrate that the difference between immediate roof and false roof is 260-258.7=1.3cm
So show that the first false roof module 6 length are for being the 20cm(reference value), the first immediate roof module 4 length are 20.2cm, the first masonry beam module 2 length are 21.3cm.
And calculate H
gearfor 9.6m; K is broken expansion factor, gets 1.3; η is the coal residual coefficients, gets 0.2; H is thickness of coal seam, 12cm; h
1be the first false roof module 6 height, 5cm; h
2for immediate roof module height, 8cm;
Calculate H
cash=1.3*(12*0.2+5+8)=20cm.
Finally obtained the following specification of the various piece of the present embodiment model by said method: described model casing 11 is of a size of 110cm * 20cm * 60cm; Described coal seam module 7 is of a size of 35cm * 18cm * 12cm; Described the first false roof module 6 is of a size of 20cm * 18cm * 5cm, described immediate roof module height is 8cm, by 1 the first immediate roof module 4 and 7 the second immediate roof module 5 that are of a size of 8cm * 18cm * 8cm that are of a size of 20.2cm * 18cm * 8cm, formed, described the first masonry beam module 2 is of a size of 21.3cm * 18cm * 22cm, and described masonry beam main body 1 is of a size of 54cm * 18cm * 22cm; Described the second masonry beam module 3 is of a size of 18cm * 18cm * 22cm; The long 18cm of described air bag 9, diameter 17cm; Described baffle plate 8 is of a size of 4cm * 18cm * 9.6cm; The height of described spoil module 10 is 9.6cm.
System model of the present invention can dynamically demonstrate seam mining and top board structure changes, and makes simply, workable, and the demonstration that can also circulate is vivid, is highly suitable for applying in teaching demonstration, has wide market outlook.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (10)
1. a Simulation Model of demonstrating the dynamic change of seam mining top board, is characterized in that: comprise and comprise successively from bottom to up coal seam module (7), false roof module, immediate roof module and masonry beam module;
Described masonry beam module consists of the first masonry beam module (2), masonry beam main body (1) and the second masonry beam module (3), wherein, the bottom-hinged of described masonry beam main body (1) and described the first masonry beam module (2), hinged with the top of described the second masonry beam module (3);
Described immediate roof module comprises the first immediate roof module (4) and at least 4 the second immediate roof modules (5), wherein, the bottom-hinged of first described second immediate roof module (5) and the first immediate roof module (4), the bottom-hinged of described the second immediate roof module (5) of front portion previous described second immediate roof module (5) with it, the top of described the second immediate roof module (5) of rear portion previous described second immediate roof module (5) with it is hinged;
Described false roof module comprises the first false roof module (6) and two described the second false roof modules (13);
Bottom in described the second immediate roof module (5) of rear portion is provided with baffle plate (8), and its height is lower than described coal seam module (7);
Air bag (9), be placed in holding in cavity of forming between described baffle plate (8), described the second immediate roof module (5) and coal seam module (7), and the height after described air bag (9) inflation equals described false roof module and described coal seam module (7) sum.
2. the Simulation Model of demonstration seam mining top board according to claim 1 dynamic change, is characterized in that: between described coal seam module (7), described the first false roof module (6), described the first immediate roof module (4) and described the first masonry beam module (2), by cementing agent, fix;
Locate also to be provided with hydraulic module (12) near described coal seam module (7) in described spatial accommodation, in the bottom of described the second masonry beam module (3), also be provided with spoil module (10); Described masonry beam module is made by the PVC material, described immediate roof module is made by plastic foam, described the first false roof module (6) is made by timber or PVC material, two described the second false roof modules (13) are made by having flexible deformable material, one of them is fixed on module top, described coal seam, be positioned at the bottom of the 1st described the second immediate roof module (5), another described second false roof module (13) is fixed on described hydraulic module (12).
3. the Simulation Model of demonstration seam mining top board according to claim 1 and 2 dynamic change is characterized in that:
The length of described the first immediate roof module (4) is less than described the first masonry beam module (2), and be greater than the length of described the first false roof module (6), the length of described coal seam module (7) is greater than described the first masonry beam module (2), the length sum of a plurality of described the second immediate roof modules (5) is greater than the length of described masonry beam main body (1), and the height of described hydraulic module (12) is with the height of described coal seam module (7).
4. according to the Simulation Model of claim 1 or 2 or 3 described demonstration seam mining top board dynamic changes, it is characterized in that: described the second immediate roof module (5) is 7, wherein, the bottom-hinged of the 1st described the second immediate roof module (5) and described the first immediate roof module (4) from left to right, the bottom-hinged of 2nd～5 described the second immediate roof modules (5) previous described second immediate roof module (5) with it, the 6th and the top of 7 described the second immediate roof modules (5) previous described second immediate roof module (5) with it hinged; Described baffle plate (8) is arranged at the bottom of the 7th described the second immediate roof module (5).
5. the Simulation Model of demonstration seam mining top board according to claim 4 dynamic change, it is characterized in that: described air bag (9) comprises utricule and snorkel (13), locate to be provided with inflation/deflation switch (14) at the described snorkel (13) near described utricule,, support described a plurality of described the second immediate roof module (5) and draw a straight line and be horizontal with the first immediate roof module (4) during in inflated condition when described air bag; Described air bag (9) is two, and the venting of two air bags means the exploitation to coal seam.
6. the Simulation Model of demonstration seam mining top board according to claim 3 dynamic change is characterized in that:
Described coal seam module (7) is L with the difference of the length of described the first false roof module (6)
1, described the first false roof module (6) is L with the difference of the length of described the first immediate roof module (4)
2, the difference of the length of described the first immediate roof module (4) and described the first masonry beam module (2) is L
3;
Described L1 calculates by following formula:
L
1poor for the length of coal seam module (7) and described the first false roof module (6), m;
S is face length, m;
ω is contrast factor, i.e. the scale down of model;
H is dark for adopting, m;
N is the main roof number;
K is factor of stress concentration;
M
ifor main roof thickness, m;
C is the main roof First Weighting Interval of Main, m;
A is abutment pressure peak positional distance rib distance, m;
The distance A of described abutment pressure peak positional distance rib calculates by following formula:
T is immediate roof rock stratum height, m;
P is old rimrock layer height, m;
Wherein, L
b=2L
1+ S+2B
B＝H·cotθ
θ is the strike angle of critical deformation.
7. the Simulation Model of demonstration seam mining top board according to claim 6 dynamic change is characterized in that:
Tri-points of minimum point C1 of the sidewall of the minimum point B1 of the sidewall of the minimum point A1 of the sidewall of the close goaf of described the first false roof module (6) one side, the close goaf of described the first immediate roof module (4) one side and the close goaf of described the first masonry beam module (2) one side are all on same ellipse, and elliptic equation is as follows:
Place, the bottom surface straight line of described the first false roof module (6) is the x axle, and the distance of the described A1 of initial point distance is 260cm,
L2 and L3 calculate by the following method:
Bring the height value of described the first false roof module (6) into described elliptic equation, the absolute value of the x coordinate value difference at the x coordinate figure obtained and A1 point place is L2;
The value that the height addition of described the first false roof module (6) and described the first immediate roof (4) is obtained is brought described elliptic equation into, and the absolute value of the x coordinate value difference at the x coordinate figure obtained and B1 point place is L3.
8. the Simulation Model of demonstration seam mining top board according to claim 7 dynamic change is characterized in that:
The height of described spoil module (10) and described baffle plate (8) adopts following formula to calculate:
H
cash=k* (η h+h
1+ h
2)
H
gear=k* (η h+h
1)
H
cashfor the accumulative total height of spoil, cm;
H
gearfor height of baffle plate, cm;
K is broken expansion factor, generally gets 1.3;
η is the coal residual coefficients, generally gets 0.2;
H is thickness of coal seam, cm;
H
1be the first false roof module height, cm;
H
2for immediate roof module height, cm.
9. the Simulation Model of demonstration seam mining top board according to claim 1 dynamic change, it is characterized in that: also comprise the model casing (11) that holds described model, it is made by transparent material; Described hinged finger is connected by hinge (14).
10. the Simulation Model of demonstration seam mining top board according to claim 6 dynamic change is characterized in that:
ω is 0.024, and described model casing (11) is of a size of 110cm * 20cm * 60cm; Described coal seam module (7) is of a size of 35cm * 18cm * 12cm; Described the first false roof module (6) is of a size of 20cm * 18cm * 5cm, described immediate roof module height is 8cm, by 1 the first immediate roof module (4) and 7 the second immediate roof module (5) that are of a size of 8cm * 18cm * 8cm that are of a size of 20.2cm * 18cm * 8cm, formed, described the first masonry beam module (2) is of a size of 21.3cm * 18cm * 22cm, and described masonry beam main body (1) is of a size of 54cm * 18cm * 22cm; Described the second masonry beam module (3) is of a size of 18cm * 18cm * 22cm; The long 18cm of described air bag (9), diameter 17cm; Described baffle plate (8) is of a size of 4cm * 18cm * 9.6cm; The height of described spoil module (10) is 9.6cm.
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| CN108470507A (en) * | 2018-05-30 | 2018-08-31 | 西安科技大学 | A kind of coal working face back production and fluid-percussion model of isolated support pushing device |
| CN108470507B (en) * | 2018-05-30 | 2023-06-23 | 西安科技大学 | Coal face stoping and hydraulic model support propelling device |
| CN110596342A (en) * | 2019-07-09 | 2019-12-20 | 太原理工大学 | Similar simulation test device and method for modular caving coal mining |
| CN110596342B (en) * | 2019-07-09 | 2022-02-18 | 太原理工大学 | Similar simulation test device and method for modular caving coal mining |
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