CN105443123A - Automatic coal-cutting stimulation system for analog simulation experiment - Google Patents
Automatic coal-cutting stimulation system for analog simulation experiment Download PDFInfo
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- CN105443123A CN105443123A CN201510768545.1A CN201510768545A CN105443123A CN 105443123 A CN105443123 A CN 105443123A CN 201510768545 A CN201510768545 A CN 201510768545A CN 105443123 A CN105443123 A CN 105443123A
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- 238000004088 simulation Methods 0.000 title claims abstract description 118
- 230000000638 stimulation Effects 0.000 title abstract 3
- 239000003245 coal Substances 0.000 claims description 91
- 239000011435 rock Substances 0.000 claims description 16
- 238000009412 basement excavation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 238000005065 mining Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000011888 foil Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000032798 delamination Effects 0.000 claims description 3
- 230000008034 disappearance Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
-
- 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
- E21D23/04—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
- E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
- E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an automatic coal-cutting stimulation system for an analog simulation experiment, which comprises a coal-cutting simulation device and a hydraulic support simulation device arranged at the rear side of the coal-cutting simulation device, wherein the hydraulic support simulation device comprises a bottom plate (1), a top plate (2), a stress meter, a drive device and a baffle (3), wherein the top part and the bottom part of the stress meter are respectively connected with the top plate (2) and the bottom plate (1); the upper end of the baffle (3) is connected with the rear end of the top plate (2), and the angle between the baffle (3) and the top plate (2) is an obtuse angle; the drive device is used for driving the hydraulic support simulation device to move; the angle between the top plate (2) and the horizontal plane is 3 degrees; the rear end of the top plate (2) is higher than the front end of the top plate (2); and the angle between the baffle (3) and the top plate (2) is 150 degrees. The automatic coal-cutting stimulation system for an analog simulation experiment disclosed by the invention can improve the experiment accuracy and enable the experiment to be more intelligentized.
Description
Technical field
The present invention relates to mining machinery field, particularly relate to a kind of automatic coal cutting simulation system for similarity simulation experiment of mining for simulated field.
Background technology
Analog simulation model and device are used for simulate formation coal seam digging process, by the situation of change of rock stratum above simulation hand excavation coal seam and coal seam, infer the situation of change of Roof Rock Strata of Coal Seam in actual digging process, so be referred to as scale model.
But there is following defect in scale model of the prior art:
First, digging process is artificial by thin iron rod excavation, be generally every two hours excavations certain distance coal seam (as about 50mm), this method does not meet the similar speed that pushes to adopt of analog simulation (according to the likelihood ratio of 100:1, this just means that coal pushes to adopt 5m forward once, this is unscientific), namely excavate according to certain speed, and a general model need three days three night above Time Continuous excavation, this requires that again experimenter also needs every two hours excavations once at night, an experiment generally needs 3-5 name to excavate personnel, workload is very large, very inconvenient.
The second, staff is when excavating, and due to the general wide 300mm of scale model device, in middle part, model relative rigid is just looked at unclear, often digs wrong top board or base plate etc., and the Influence on test result for experiment is larger.
3rd, sometimes model relative rigid, need to use very large strength just can dig, position in a model, even need to beat just can dig, this vibrations, beat or unconsciously touch top board, being all equivalent to the impact of bump very large in actual production, the Influence on test result such as experiment therefore for some research top board structure is larger.
Finally, analog simulation mainly studies the stress characteristics of roof and floor at present, top board be caving feature etc., can analog operation face face analogue means and its migration and stress monitoring system and method but also do not have at present, the Influence on test result for similarity simulation experiment is larger.
Summary of the invention
The technical problem to be solved in the present invention is to provide one can improve experiment accuracy, greatly reduces working strength, makes the more intelligentized automatic coal cutting simulation system for similarity simulation experiment of experiment.
A kind of automatic coal cutting simulation system for similarity simulation experiment, be arranged in analog simulation model, described analog simulation model comprises support body, be arranged on the coal seam on described support body and be arranged on the support bar of the both sides bottom it, be arranged at other rock stratum of upper and lower, described coal seam, the described automatic coal cutting simulation system for similarity simulation experiment is arranged in described coal seam, described support bar runs, the described automatic coal cutting simulation system for similarity simulation experiment comprises coal mining analogue means and is positioned at the hydraulic support analogue means on rear side of it, described hydraulic support analogue means comprises base plate, top board, stressometer measuring device, drive unit and baffle plate, wherein, the top of described stressometer measuring device is connected with described top board and base plate respectively with bottom, the upper end of described baffle plate is connected with the rear end of described top board, angle between described baffle plate and described top board is obtuse angle, drive unit drives described hydraulic support analogue means to move, angle between described top board and horizontal plane is 3 °, and the rear end of top board is higher than front end, and the angle between described baffle plate and described top board is 150 °.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, the inner prop that wherein said stressometer measuring device comprises the first housing and is provided at its inner portion, described inner prop freely can slide up and down in described first housing, the top of described inner prop is fixedly connected with described top board, strain films is connected with in the bottom of described first housing, and described strain films covers the bottom of described first housing, described strain films, air cavity is formed between described first housing and described inner prop, air bag is provided with in described air cavity, described air bag is sealed to form by plastic film, described strain films is connected with strain gauge by data wire, described strain gauge is connected with computer.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, the bottom of wherein said first housing connects the second housing, and the thickness of described second housing is less than the thickness of described first housing, and the bottom of described second housing connects gripper shoe;
Described inner prop, described first housing, described second housing are cylindrical, one end joint of described data wire is arranged on the described strain films on the bottom of described first housing, described second housing is provided with through hole, the other end of described data wire passes from described through hole, is connected with described strain gauge; Described second housing is evenly provided with multiple air-vent.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, wherein said stressometer measuring device also comprises arrangement for adjusting height, described arrangement for adjusting height is made up of the external spiral bar be threaded and inside spin bar, the lower end of described inside spin bar is fixed on described base plate, the upper end of described external spiral bar is connected with described gripper shoe, the edge of described gripper shoe is provided with draw-in groove, the top of described external spiral bar is fixed with the card matched with described draw-in groove, described card is arranged in described draw-in groove, and freely can rotate in described draw-in groove.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, the distance between the front end of wherein said inner prop and the front end of described top board is 50mm, the bottom of described baffle plate apart from described base plate rear end between horizontal range be 15mm.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, wherein, in a free state, distance between the top of described inner prop and the top of described first housing is 7mm, the diameter of described inner prop is 8mm, be highly 15mm, the thickness of described first housing is 6mm, the thickness of described second housing is 1.5mm, external diameter is consistent with the external diameter of described first housing, the height of described arrangement for adjusting height is 15mm, the length of described base plate is 70mm, the length of described top board is 70mm, the length of described baffle plate is 70mm, the bottom of described base plate is provided with wheel body, described wheel body is connected with described drive unit.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, wherein, described stressometer measuring device is two that are arranged side by side.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, wherein, described coal-winning machine analogue means comprises cylinder, drum drive, coal-winning machine drive unit, described cylinder is divided into symmetrical two parts, centre is gear screw thread, be connected with described drum drive, be provided with helical blade on which cylinder, evenly spike-tooth is provided with at the edge of described helical blade, described spike-tooth has sharp keen tip, and direction, tip is outwards arranged, the direction of rotation of the helical blade on two parts cylinder of left and right is oppositely arranged, namely be symmetrical arranged relative to described gear screw thread.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, wherein, is evenly provided with multiple coal brush on which cylinder, and the length of described coal brush is with the long 2mm of height of described helical blade; Described coal-winning machine analogue means also comprises wheel body, and described wheel body is connected with described coal-winning machine drive unit.
Automatic coal cutting simulation system for similarity simulation experiment of the present invention, wherein, described stressometer measuring device is two that are arranged side by side.
The using method of the automatic coal cutting simulation system for similarity simulation experiment of the present invention, comprises the steps:
(A) experimental tool, material and plant and instrument is got out;
(B) according to the principle of similitude, the coal rock layer needing simulation is laid in layering, ensure that the coal rock layer aspect of laying is straight, foil gauge is laid needing the rock stratum of monitor stress, all guide the data wire of described foil gauge into side, pass from analog simulation device two mother rib lateral rotundum, simultaneously installation side backplate;
(C) air-dry, maintenance model one week, both sides side guard board corresponding to the part side guard board of analog simulation device and coal seam unloads by period;
(D) compensate the load lacked, by lever or counterweight iron block, be added on overlying rock aspect to compensate the load of disappearance;
(E) on analog simulation device, install bracing frame, support frame as described above is parallel with seat earth, is arranged on the both sides in described coal seam, and supported on both sides frame is apart from the described each 15mm of automatic coal cutting simulation system for similarity simulation experiment;
(F) what hand excavation 130mm was long cuts eye, installs package unit, adjustment screw rod height, top board hydraulic support analogue means top board is contacted with roof, according to the actual exploitation rate in colliery, moves frame distance determining device parameter, connection data line, switches on power, excavation model;
(G) in digging process, roof pressure and roof delamination data are monitored, store and ultimate analysis is carried out to result.
The automatic coal cutting simulation system difference from prior art that the present invention is used for similarity simulation experiment is:
The automatic coal cutting simulation system tool that the present invention is used for similarity simulation experiment has the following advantages:
First, devise automatic excavation, self-propelled coal mining analogue means, can realize simulating coal actual exploitation rate excavation coal seam completely.Without the need to manual operation, improve the science of experiment, and save a large amount of manual operation amount;
Secondly, devise the hydraulic support analogue means can monitoring roof pressure, roof Stress feature after the excavation of coal seam can be monitored, with actual monitoring value as a comparison, can well reacting phase like the analog result degree of accuracy;
Finally, devise hydraulic support drive unit, the actual frame situation of moving in colliery can be simulated to promote support, the degree of accuracy of similarity simulation experiment can be improved more.
Below in conjunction with accompanying drawing, the automatic coal cutting simulation system for similarity simulation experiment of the present invention is described further.
Accompanying drawing explanation
Fig. 1 is the perspective view of the present invention for the automatic coal cutting simulation system of similarity simulation experiment;
Fig. 2 is the lateral view of the present invention for the automatic coal cutting simulation system of similarity simulation experiment;
Fig. 3 is the structural representation of the present invention for the stressometer measuring device of the automatic coal cutting simulation system of similarity simulation experiment;
Fig. 4 is the structural representation of the present invention for the coal-winning machine of the automatic coal cutting simulation system of similarity simulation experiment.
Detailed description of the invention
Embodiment 1
As shown in Figure 1 to 4, a kind of automatic coal cutting simulation system for similarity simulation experiment, be arranged in analog simulation model, analog simulation model comprises support body, be arranged on the coal seam on support body and be arranged on the support bar of the both sides bottom it, be arranged at other rock stratum of upper and lower, coal seam, automatic coal cutting simulation system for similarity simulation experiment is arranged in coal seam, support bar runs, automatic coal cutting simulation system for similarity simulation experiment comprises coal mining analogue means and is positioned at the hydraulic support analogue means on rear side of it, hydraulic support analogue means comprises base plate 1, top board 2, stressometer measuring device, drive unit and baffle plate 3, wherein, the top of stressometer measuring device is connected with top board 2 and base plate 1 respectively with bottom, the upper end of baffle plate 3 is connected with the rear end of top board 2, angle between baffle plate 3 and top board 2 is obtuse angle, drive unit drives hydraulic support analogue means to move.
Stressometer measuring device is two that are arranged side by side, the inner prop 5 that stressometer measuring device comprises the first housing 4 and is provided at its inner portion, and inner prop 5 freely can slide up and down in the first housing 4, with peripheral shell sliding friction, inner prop and case surface are all very smooth, and frictional force is minimum, do not affect stress measurement; The top of inner prop 5 is fixedly connected with top board 2, strain films 6 is connected with in the bottom of the first housing 4, and strain films 6 covers the bottom of the first housing 4, air cavity is formed between strain films 6, first housing 4 and inner prop 5, air bag 7 is provided with in air cavity, air bag 7 is sealed to form by plastic film, and strain films 6 is connected with strain gauge by data wire 8, and strain gauge is connected with computer.Size according to top air cavity pressure produces corresponding deformation, is transferred on strain gauge, is finally connected to computer through data wire 8, and data show and store on computers;
The thickness that the bottom of the first housing 4 connects the second housing 9, second housing 9 is less than the thickness of the first housing 4, and the bottom of the second housing 9 connects gripper shoe 10;
Inner prop 5, first housing 4, second housing 9 is cylindrical, and it is prevent the end of a thread self gravitation from affect strain films distortion that an end joint of data wire 8 is arranged on this design on the strain films 6 on the bottom of the first housing 4, thus guarantee measuring accuracy; Second housing 9 is provided with through hole, and the other end of data wire 8 passes from through hole, is connected with strain gauge; Second housing 9 is evenly provided with multiple air-vent.
Stressometer measuring device also comprises arrangement for adjusting height, arrangement for adjusting height is made up of the external spiral bar 11 be threaded and inside spin bar 12, the lower end of inside spin bar 12 is fixed on base plate 1, the upper end of external spiral bar 11 is connected with gripper shoe 10, the edge of gripper shoe 10 is provided with draw-in groove 13, the top of external spiral bar 11 is fixed with the card 14 matched with draw-in groove 13, and card 14 is arranged in draw-in groove 13, and freely can rotate in draw-in groove 13.
Angle between top board 2 and horizontal plane is 3 °, the rear end of top board 2 is higher than front end, this design moves the operation of frame to allow hydraulic support analogue means fully can simulate support along with seam mining, the too little or angle of the angle number of degrees is zero, hydraulic support top board may encounter roof, cannot advance; The angle number of degrees are too large, then cause top board pressure-bearing not steady, batchmeter institute pressure measurement force value and actual value have deviation.Angle between baffle plate 3 and top board 2 is 150 °, the design of baffle angle and length, can ensure that broken sandstone can be slipped to seat earth, or monoblock sandstone touches on baffle plate, along with support moves, does not all affect meter measurement forward.Distance between the front end of inner prop 5 and the front end of top board 2 is 50mm, and when can ensure traversing carriage, coal mining analogue means under top board, can play a protective role.Horizontal range between the rear end of the bottom distance base plate 1 of baffle plate 3 is 15mm, and can ensure that internal stent can not enter sandstone, impact uses.
In a free state; distance between the top of inner prop 5 and the top of the first housing 4 is 7mm; when difference in height can ensure that top board 2 is subject to top pressure; top board 2 can sink together along with inner prop 5, thus reaches the object of measurement, simultaneously when deflection more than 7mm; now; force value is more than 0.3Mpa, and the first housing 4 can stop top board 2 to decline further, and protection strain films 6 does not destroy by large deformation.
The diameter of inner prop 5 is 8mm, be highly 15mm, the thickness of the first housing 4 is 6mm, and the thickness of the second housing 9 is 1.5mm, and external diameter is consistent with the external diameter of the first housing 4, the height of arrangement for adjusting height is 15mm, the length of base plate 1 is 70mm, and the length of top board 2 is 70mm, and the length of baffle plate 3 is 70mm, the bottom of base plate 1 is provided with wheel body, and wheel body is connected with drive unit.
During use, the experimentally realistic simulation height in coal seam, rotation height regulates external spiral bar 11, highly regulates external spiral bar 11 to be connected with highly regulating inside spin bar 12 spiral, and rotation height regulates external spiral bar 11 can rotate thus increase or reduce the height of hydraulic support analogue means.Gripper shoe 10, the space formed between strain films 6 and the second housing 9 facilitate strain films 6 to be out of shape, and surrounding has several air-vent, for keeping and extraneous UNICOM, ensure as normal atmosphere (An) pressure.
Coal-winning machine analogue means comprises cylinder 15, drum drive, coal-winning machine drive unit, wherein, cylinder 15 is divided into symmetrical two parts, centre is gear screw thread 16, be connected with drum drive 17, cylinder 15 is provided with helical blade 18, spike-tooth 19 is evenly provided with at the edge of helical blade 18, spike-tooth 19 has sharp keen tip, and direction, tip is outwards arranged, the direction of rotation of the helical blade 18 on left and right two parts cylinder 15 is oppositely arranged, and is namely symmetrical arranged relative to gear screw thread 16.
Cylinder 15 is evenly provided with multiple coal brush 20, and the length of coal brush 20 is with the long 2mm of height of helical blade 18; Coal-winning machine analogue means also comprises wheel body, and wheel body is connected with coal-winning machine drive unit.
Cylinder 15 major function is cutting coal seam, is transported to beyond analog simulation device by the coal of cutting simultaneously.Coal mining machine roller is rotated down, gear screw thread 16 is connected with the motor gear of drum drive 17, helical blade 18 cuts coal seam together with spike-tooth 19, utilize helical blade 18 to be carried to device both sides by coal simultaneously, the many bunches of plastics that coal brush 20 is made up of plastics are carefully excellent, the cinder of base plate can be cleaned out, not allow ground coal affect experiment effect.
The using method of the automatic coal cutting simulation system for similarity simulation experiment of the present invention, comprises the steps:
A, get out experimental tool, material and plant and instrument;
B, according to the principle of similitude, layering lay need simulation coal rock layer, ensure lay coal rock layer aspect straight, foil gauge is laid needing the rock stratum of monitor stress, all guide the data wire of foil gauge into side, pass from analog simulation device two mother rib lateral rotundum, simultaneously installation side backplate;
C, air-dry, maintenance model one week, both sides side guard board corresponding to the part side guard board of analog simulation device and coal seam unloads by period;
The load that D, compensation lack, by lever or counterweight iron block, is added on overlying rock aspect to compensate the load of disappearance;
E, on analog simulation device, install bracing frame, support frame as described above is parallel with seat earth, is arranged on the both sides in described coal seam, and supported on both sides frame is apart from the described each 15mm of automatic coal cutting simulation system for similarity simulation experiment;
What F, hand excavation 130mm were long cuts eye, installs package unit, adjustment screw rod height, top board hydraulic support analogue means top board is contacted with roof, according to the actual exploitation rate in colliery, moves frame distance determining device parameter, connection data line, switches on power, excavation model;
In G, digging process, roof pressure and roof delamination data are monitored, store and ultimate analysis is carried out to result.
Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (10)
1. the automatic coal cutting simulation system for similarity simulation experiment, be arranged in analog simulation model, described analog simulation model comprises support body, be arranged on the coal seam on described support body and be arranged on the support bar of the both sides bottom it, be arranged at other rock stratum of upper and lower, described coal seam, it is characterized in that: the described automatic coal cutting simulation system for similarity simulation experiment is arranged in described coal seam, described support bar runs, the described automatic coal cutting simulation system for similarity simulation experiment comprises coal mining analogue means and is positioned at the hydraulic support analogue means on rear side of it, described hydraulic support analogue means comprises base plate (1), top board (2), stressometer measuring device, drive unit and baffle plate (3), wherein, the top of described stressometer measuring device is connected with described top board (2) and base plate (1) respectively with bottom, the upper end of described baffle plate (3) is connected with the rear end of described top board (2), angle between described baffle plate (3) and described top board (2) is obtuse angle, drive unit drives described hydraulic support analogue means to move, angle between described top board (2) and horizontal plane is 3 °, and the rear end of described top board (2) is higher than front end, and the angle between described baffle plate (3) and described top board (2) is 150 °.
2. the automatic coal cutting simulation system for similarity simulation experiment according to claim 1, it is characterized in that: the inner prop (5) that described stressometer measuring device comprises the first housing (4) and is provided at its inner portion, described inner prop (5) freely can slide up and down in described first housing (4), the top of described inner prop (5) is fixedly connected with described top board (2), strain films (6) is connected with in the bottom of described first housing (4), and described strain films (6) covers the bottom of described first housing (4), described strain films (6), air cavity is formed between described first housing (4) and described inner prop (5), air bag (7) is provided with in described air cavity, described air bag (7) is sealed to form by plastic film, described strain films (6) is connected with strain gauge by data wire (8), described strain gauge is connected with computer.
3. the automatic coal cutting simulation system for similarity simulation experiment according to claim 2, it is characterized in that: the bottom of described first housing (4) connects the second housing (9), the thickness of described second housing (9) is less than the thickness of described first housing (4), and the bottom of described second housing (9) connects gripper shoe (10);
Described inner prop (5), described first housing (4), described second housing (9) are cylindrical, one end joint of described data wire (8) is arranged on the described strain films (6) on the bottom of described first housing (4), described second housing (9) is provided with through hole, the other end of described data wire (8) passes from described through hole, is connected with described strain gauge; Described second housing (9) is evenly provided with multiple air-vent.
4. the automatic coal cutting simulation system for similarity simulation experiment according to claim 2, it is characterized in that: described stressometer measuring device also comprises arrangement for adjusting height, described arrangement for adjusting height is made up of the external spiral bar (11) be threaded and inside spin bar (12), the lower end of described inside spin bar (12) is fixed on described base plate (1), the upper end of described external spiral bar (11) is connected with described gripper shoe (10), the edge of described gripper shoe (10) is provided with draw-in groove (13), the top of described external spiral bar (11) is fixed with the card (14) matched with described draw-in groove (13), described card (14) is arranged in described draw-in groove (13), and freely can rotate in described draw-in groove (13).
5. the automatic coal cutting simulation system for similarity simulation experiment according to claim 3, it is characterized in that: the distance between the front end of described inner prop (5) and the front end of described top board (2) is 50mm, the bottom of described baffle plate (3) apart from described base plate (1) rear end between horizontal range be 15mm.
6. the automatic coal cutting simulation system for similarity simulation experiment according to claim 4, it is characterized in that: in a free state, distance between the top of described inner prop (5) and the top of described first housing (4) is 7mm, the diameter of described inner prop (5) is 8mm, be highly 15mm, the thickness of described first housing (4) is 6mm, the thickness of described second housing (9) is 1.5mm, external diameter is consistent with the external diameter of described first housing (4), the height of described arrangement for adjusting height is 15mm, the length of described base plate (1) is 70mm, the length of described top board (2) is 70mm, the length of described baffle plate (3) is 70mm, the bottom of described base plate (1) is provided with wheel body, described wheel body is connected with described drive unit.
7. the automatic coal cutting simulation system for similarity simulation experiment according to claim 5, it is characterized in that: described coal-winning machine analogue means comprises cylinder (15), drum drive, coal-winning machine drive unit, wherein, described cylinder (15) is divided into symmetrical two parts, centre is gear screw thread (16), be connected with described drum drive (17), described cylinder (15) is provided with helical blade (18), spike-tooth (19) is evenly provided with at the edge of described helical blade (18), described spike-tooth (19) has sharp keen tip, and direction, tip is outwards arranged, the direction of rotation of the helical blade (18) on left and right two parts cylinder (15) is oppositely arranged, namely be symmetrical arranged relative to described gear screw thread (16).
8. the automatic coal cutting simulation system for similarity simulation experiment according to claim 6, it is characterized in that: on described cylinder (15), be evenly provided with multiple coal brush (20), the length of described coal brush (20) is with the long 2mm of height of described helical blade (18); Described coal-winning machine analogue means also comprises wheel body, and described wheel body is connected with described coal-winning machine drive unit.
9. the automatic coal cutting simulation system for similarity simulation experiment according to claim 7, is characterized in that: described stressometer measuring device is two that are arranged side by side.
10. the using method of the automatic coal cutting simulation system for similarity simulation experiment according to any one of claim 1 ~ 8, is characterized in that: comprise the steps:
(A) experimental tool, material and plant and instrument is got out;
(B) according to the principle of similitude, the coal rock layer needing simulation is laid in layering, ensure that the coal rock layer aspect of laying is straight, foil gauge is laid needing the rock stratum of monitor stress, all guide the data wire of described foil gauge into side, pass from analog simulation device two mother rib lateral rotundum, simultaneously installation side backplate;
(C) air-dry, maintenance model one week, both sides side guard board corresponding to the part side guard board of analog simulation device and coal seam unloads by period;
(D) compensate the load lacked, by lever or counterweight iron block, be added on overlying rock aspect to compensate the load of disappearance;
(E) on analog simulation device, install bracing frame, support frame as described above is parallel with seat earth, is arranged on the both sides in described coal seam, and supported on both sides frame is apart from the described each 15mm of automatic coal cutting simulation system for similarity simulation experiment;
(F) what hand excavation 130mm was long cuts eye, installs package unit, adjustment screw rod height, top board hydraulic support analogue means top board is contacted with roof, according to the actual exploitation rate in colliery, moves frame distance determining device parameter, connection data line, switches on power, excavation model;
(G) in digging process, roof pressure and roof delamination data are monitored, store and ultimate analysis is carried out to result.
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