CN110566258A - Support model for simulating fully mechanized caving mining of coal mine - Google Patents
Support model for simulating fully mechanized caving mining of coal mine Download PDFInfo
- Publication number
- CN110566258A CN110566258A CN201910780188.9A CN201910780188A CN110566258A CN 110566258 A CN110566258 A CN 110566258A CN 201910780188 A CN201910780188 A CN 201910780188A CN 110566258 A CN110566258 A CN 110566258A
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- China
- Prior art keywords
- coal
- support arm
- hinged
- top beam
- screw
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
Abstract
The invention discloses a support model for simulating fully mechanized caving mining of a coal mine, which comprises a top beam, a base and a plurality of rhombic lifting frames, wherein the top beam is connected with the base through the rhombic lifting frames; a stress monitoring mechanism is arranged on the top beam corresponding to the area of the joint of the rhombic lifting frame; one end of the top beam is connected with a coal discharging mechanism, and the coal discharging mechanism comprises a shield beam, a coal discharging plate and a first screw driving device; the middle part of the shield beam is provided with a stress monitoring mechanism, one end of the shield beam is hinged with one end of the top beam, the other end of the shield beam is hinged with one end of the coal discharging plate, and the other end of the coal discharging plate is connected with the first screw driving device. The rhombic lifting frame is used for controlling the lifting of the top beam, the first screw driving device is used for driving and controlling the opening degree and the opening time of the coal discharge port, the limitation of the diameter of a hydraulic cylinder is avoided, the stress changes of different positions of the top beam and the stress changes of the support shield beam in the coal discharge process can be completely monitored, and the accuracy of an experimental simulation result is improved.
Description
Technical Field
The invention relates to the field of coal mine fully mechanized caving mining simulation equipment, in particular to a support model for simulating coal mine fully mechanized caving mining.
Background
the fully mechanized caving mining in China has been developed for 35 years, and has become a main mining method for thick and ultra-thick coal seams from reference of foreign experiences, technical innovation and mature popularization. The mine pressure display rule of the fully mechanized caving mining face and the action relation of the support and the surrounding rock are different from those of the common fully mechanized mining face, particularly the fully mechanized caving mining of an extra-thick coal seam, and the mine pressure display rule and the support bearing capacity of the top coal caving mining face can be mastered to a certain degree by monitoring the stress of an underground upright post, the advance supporting pressure, the stress of a lateral coal post and the stress of an anchor rod and an anchor rope. In order to master the migration rule of the overburden stratum and the distribution and transmission characteristics of the mine pressure in detail, a physical similarity simulation experiment of different coal seam occurrence states is developed in a laboratory to become a first choice, monitoring points are arranged at different positions based on the principles of geometric similarity, motion similarity and power similarity, and the changes of strain and displacement are monitored. In the research process of the interaction relation between the support and the surrounding rock, a small hydraulic support model is mainly designed to monitor the stress of the support upright post of the similar model, but because the cylinder diameter of the support upright post is small, the phenomena of 'running, overflowing, dripping and leaking' of hydraulic oil are easy to occur in the test process, the stress change of different positions of the top beam and the stress change of the support shield beam in the coal caving process can not be completely monitored, and the accuracy of the experimental simulation result is influenced.
Disclosure of Invention
The invention aims to provide a support model for simulating fully mechanized caving mining of a coal mine, and aims to solve the problems that the cylinder diameter of a hydraulic support model is small, the phenomena of 'running, overflowing, dripping and leaking' of hydraulic oil are easy to occur in the test process, the stress changes of different positions of a top beam cannot be completely monitored, and the accuracy of the test simulation result is influenced by the stress changes of a support shield beam in the coal caving process.
According to the embodiment of the invention, the support model for simulating the fully mechanized caving mining of the coal mine is provided, and comprises a top beam, a base and a plurality of rhombic lifting frames, wherein the top beam is connected with the base through the rhombic lifting frames; a stress monitoring mechanism is arranged in the area of the top beam corresponding to the joint of the rhombic lifting frame;
One end of the top beam is connected with a coal discharging mechanism, and the coal discharging mechanism comprises a shield beam, a coal discharging plate and a first screw driving device; the middle part of the shield beam is provided with a stress monitoring mechanism, one end of the shield beam is hinged with one end of the top beam, the other end of the shield beam is hinged with one end of the coal discharging plate, and the other end of the coal discharging plate is connected with a first screw driving device.
Specifically, each rhombic lifting frame comprises a first upper support arm, a second upper support arm, a first lower support arm and a second lower support arm;
One end of the first lower support arm and one end of the second lower support arm are hinged to the base; the other end of the first lower support arm is hinged with one end of the first upper support arm; the other end of the second lower support arm is hinged with one end of the second upper support arm; the other end of the first upper support arm and the other end of the second upper support arm are hinged with the bottom surface of the top beam;
And the hinged part of the first upper support arm and the first lower support arm and the hinged part of the second upper support arm and the second lower support arm are connected with a second screw driving device.
specifically, the second screw driving device comprises a bracket lifting screw; the hinge rod at the hinged position of the first upper support arm and the first lower support arm is provided with a first screw hole, the hinge rod at the hinged position of the second upper support arm and the second lower support arm is provided with a second screw hole, and one end of the support lifting screw rod penetrates through the first screw hole and the second screw hole in sequence.
Specifically, the first screw driving device comprises a coal discharge control screw and a threaded pipe with an internal thread, one end of the threaded pipe is hinged to the other end of the coal discharge plate, one end of the coal discharge control screw is in threaded connection with the other end of the threaded pipe, and the other end of the coal discharge control screw is rotatably connected to the base.
Specifically, the coal discharging mechanism further comprises a connecting rod, one end of the connecting rod is hinged to the shield beam, and the other end of the connecting rod is hinged to the base.
Specifically, the stress monitoring mechanism is connected with a strain gauge.
Specifically, the number of the rhombic lifting frames is four, and the four rhombic lifting frames are respectively connected with the areas close to the four corners of the top beam.
the embodiment of the invention provides a support model for simulating coal mine fully-mechanized caving mining, wherein a rhombic lifting frame is used for controlling the lifting of a top beam, a first screw driving device is used for driving and controlling the opening degree and the opening time of a coal caving port, the limitation of the diameter of a hydraulic cylinder is avoided, the phenomena of 'running, overflowing, dripping and leaking' of hydraulic oil cannot occur in the simulation process, the stress changes of different positions of the top beam and the stress change of a support shield beam in the coal caving process can be completely monitored, and the accuracy of an experimental simulation result is improved.
Drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a front view of a support model for simulating fully mechanized caving mining of a coal mine according to an embodiment of the invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a structural diagram of a rhombic lifting frame;
FIG. 4 is a left side view of FIG. 1;
Fig. 5 is a top view of fig. 1.
the device comprises a stress monitoring mechanism, a 2-top beam, a 3-coal caving plate, a 4-shield beam, a 5-connecting rod, a 6-base, a 7-diamond lifting frame, a 71-first upper supporting arm, a 72-second upper supporting arm, a 73-first lower supporting arm, a 74-second lower supporting arm, a 75-hinged rod, a 76-support lifting screw rod, an 8-coal caving control screw rod and a 9-threaded pipe.
Detailed Description
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
according to the embodiment of the invention, as shown in fig. 1, fig. 2, fig. 4 and fig. 5, a support model for simulating coal mine fully mechanized caving mining is provided, which comprises a top beam 2, a base 6 and a plurality of rhombic lifting frames 7, wherein the top beam 2 is connected with the base 6 through the rhombic lifting frames 7; a stress monitoring mechanism 1 is arranged on the top beam 2 corresponding to the area of the joint of the rhombic lifting frame 7; one end of the top beam 2 is connected with a coal discharging mechanism, and the coal discharging mechanism comprises a shield beam 4, a coal discharging plate 3 and a first screw driving device; the middle part of the shield beam 4 is provided with a stress monitoring mechanism 1, one end of the shield beam 4 is hinged with one end of the top beam 2, the other end of the shield beam 4 is hinged with one end of the coal caving plate 3, and the other end of the coal caving plate 3 is connected with a first screw driving device. The stress detection mechanism can be a stress sensor, the stress sensor can be connected with a strain gauge and transmits monitored stress data to the strain gauge, and the specific transmission mode can be wired or wireless network transmission, which is not limited herein; the roof beam 2 and the shield beam 4 are plate-like structures.
In the embodiment, the first screw driving device is used for driving the inclination angle of the coal discharging plate 3 so as to control the opening degree and the opening time of the coal discharging port, and the top coal discharging control in the similar simulation process can be realized; the lifting of the top beam 2 is controlled by the rhombic lifting frame 7, the top beam 2 is ensured to be in a horizontal state in the lifting process, and the phenomena that the top beam 2 is not beneficial to control, such as deviation, head lowering, head tilting and the like are prevented; the stress monitoring mechanism 1 can present the change characteristics of the stress of the support in the coal caving process through accurately measuring the stress of the top beam 2 at different positions and the shield beam 4, and provides basic data for analyzing the action relationship between the fully mechanized caving mining support and the surrounding rock.
The embodiment of the invention provides a support model for simulating coal mine fully mechanized caving mining, wherein the rhombic lifting frame 7 is used for controlling the lifting of a top beam 2, the opening degree and the opening time of a coal discharging plate 3 are driven and controlled by a first screw driving device, the limitation of the diameter of a hydraulic cylinder is avoided, the phenomena of 'running, overflowing, dripping and leaking' of hydraulic oil cannot occur in the simulation process, the stress changes of different positions of the top beam 2 and the stress change of a support shield beam 4 in the coal discharging process can be completely monitored, and the accuracy of an experimental simulation result is improved.
In the above embodiment, as shown in fig. 2 and 3, each of the diamond-shaped cranes 7 includes a first upper arm 71, a second upper arm 72, a first lower arm 73, and a second lower arm 74; one end of the first lower support arm 73 and one end of the second lower support arm 74 are hinged on the base 6; the other end of the first lower support arm 73 is hinged with one end of the first upper support arm 71; the other end of the second lower support arm 74 is hinged with one end of the second upper support arm 72; the other end of the first upper support arm 71 and the other end of the second upper support arm 72 are hinged with the bottom surface of the top beam 2; the joint of the first upper support arm 71 and the first lower support arm 73 and the joint of the second upper support arm 72 and the second lower support arm 74 are connected with a second screw driving device. Specifically, the second screw driving means includes a bracket lifting screw 76; a first screw hole is formed in a hinge rod 75 at the hinge joint of the first upper support arm 71 and the first lower support arm 73, a second screw hole is formed in a hinge rod 75 at the hinge joint of the second upper support arm 72 and the second lower support arm 74, and one end of a support lifting screw 76 sequentially penetrates through the first screw hole and the second screw hole. The rhombic lifting frame 7 is extended in the vertical direction by the rotation of the support lifting screw 76 so as to lift the top beam 2, and the support lifting screw 76 rotates reversely so as to contract the rhombic lifting frame 7 in the vertical direction so as to lower the top beam 2.
In the embodiment, the rhombic lifting frame 7 is used for replacing a hydraulic upright post in the prior art, the phenomena of 'running, overflowing, dripping and leaking' of hydraulic oil cannot occur in the simulation process, the stress changes of different positions of the top beam 2 and the stress changes of the support shield beam 4 in the coal caving process can be completely monitored, and the accuracy of an experimental simulation result is improved.
In the above embodiment, as shown in fig. 1, the first screw driving device includes a coal discharge control screw 8 and a threaded pipe 9 having an internal thread, one end of the threaded pipe 9 is hinged to the other end of the coal discharge plate 3, one end of the coal discharge control screw 8 is in threaded connection with the other end of the threaded pipe 9, and the other end of the coal discharge control screw 8 is rotatably connected to the base 6. The staff rotates coal caving control screw 8 to the flexible length of adjustment coal caving control screw 8, and then the adjustment is put the angle of placing of coal board 3 and is controlled the degree of opening and the opening time of coal caving mouth, can realize the control of giving out of top coal among the analog simulation process.
In the above embodiment, as shown in fig. 1, the coal discharging mechanism further includes a connecting rod 5, one end of the connecting rod 5 is hinged to the shield beam 4, and the other end of the connecting rod 5 is hinged to the base 6. The connecting rod 5 coordinates the lifting of the top beam 2 and the movement of the shield beam 4 to ensure the integrity of the bracket.
In the above embodiment, as shown in fig. 1, the number of the rhombic lifting frames 7 is four, and the four rhombic lifting frames 7 are respectively close to the area connection of four corners of the top beam 2, so that the supporting force applied to each part of the top beam 2 is more uniform, the top beam 2 is further ensured to be in a horizontal state, and the phenomena that the top beam 2 is not beneficial to control of the top beam 2, such as deviation, head lowering, head tilting and the like, are prevented.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (7)
1. The support model for simulating the fully mechanized caving mining of the coal mine is characterized by comprising a top beam (2), a base (6) and a plurality of rhombic lifting frames (7), wherein the top beam (2) is connected with the base (6) through the rhombic lifting frames (7); a stress monitoring mechanism (1) is arranged on the top beam (2) corresponding to the area of the joint of the rhombic lifting frame (7);
One end of the top beam (2) is connected with a coal discharging mechanism, and the coal discharging mechanism comprises a shield beam (4), a coal discharging plate (3) and a first screw rod driving device; the middle part of shield roof beam (4) is equipped with stress monitoring mechanism (1), the one end of shield roof beam (4) with the one end of back timber (2) is articulated, the other end of shield roof beam (4) with the one end of putting coal board (3) is articulated, the other end of putting coal board (3) is connected with first screw rod drive arrangement.
2. The stand model for simulating coal mine fully mechanized caving mining according to claim 1, wherein each of the rhombic shaped cranes (7) comprises a first upper arm (71), a second upper arm (72), a first lower arm (73) and a second lower arm (74);
one end of the first lower support arm (73) and one end of the second lower support arm (74) are hinged on the base (6); the other end of the first lower support arm (73) is hinged with one end of the first upper support arm (71); the other end of the second lower support arm (74) is hinged with one end of the second upper support arm (72); the other end of the first upper support arm (71) and the other end of the second upper support arm (72) are hinged with the bottom surface of the top beam (2);
And a second screw driving device is connected to the hinged part of the first upper support arm (71) and the first lower support arm (73) and the hinged part of the second upper support arm (72) and the second lower support arm (74).
3. the stand model for simulating coal mine fully mechanized caving mining according to claim 2, wherein the second screw driving device comprises a stand elevating screw (76); the hinge rod (75) at the hinge position of the first upper support arm (71) and the first lower support arm (73) is provided with a first screw hole, the hinge rod (75) at the hinge position of the second upper support arm (72) and the second lower support arm (74) is provided with a second screw hole, and one end of the support lifting screw rod (76) sequentially penetrates through the first screw hole and the second screw hole.
4. The support model for simulating the fully mechanized caving mining of the coal mine according to claim 1, wherein the first screw driving device comprises a coal caving control screw (8) and a threaded pipe (9) with internal threads, one end of the threaded pipe (9) is hinged with the other end of the coal caving plate (3), one end of the coal caving control screw (8) is in threaded connection with the other end of the threaded pipe (9), and the other end of the coal caving control screw (8) is rotatably connected to a base (6).
5. The support model for simulating the fully mechanized caving mining of the coal mine according to claim 1, wherein the coal caving mechanism further comprises a connecting rod (5), one end of the connecting rod (5) is hinged with the shield beam (4), and the other end of the connecting rod (5) is hinged with the base (6).
6. The support model for simulating the fully mechanized caving mining of coal mine according to claim 1, wherein the stress monitoring mechanism (1) is connected with a strain gauge.
7. the support model for simulating the coal mine fully mechanized caving mining according to claim 1, wherein the number of the rhombic lifting frames (7) is four, and the four rhombic lifting frames (7) are respectively connected at the areas close to the four corners of the top beam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910780188.9A CN110566258A (en) | 2019-08-22 | 2019-08-22 | Support model for simulating fully mechanized caving mining of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910780188.9A CN110566258A (en) | 2019-08-22 | 2019-08-22 | Support model for simulating fully mechanized caving mining of coal mine |
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| CN110566258A true CN110566258A (en) | 2019-12-13 |
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| CN201910780188.9A Pending CN110566258A (en) | 2019-08-22 | 2019-08-22 | Support model for simulating fully mechanized caving mining of coal mine |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2170373Y (en) * | 1993-07-31 | 1994-06-29 | 王永胜 | Swinging tail beam type hydraulic support for blasting down roof of coal mine |
| CN203362199U (en) * | 2013-07-05 | 2013-12-25 | 山西潞安环保能源开发股份有限公司 | End-head hydraulic support for fully mechanized mining face |
| CN203718326U (en) * | 2013-10-18 | 2014-07-16 | 北京汽车股份有限公司 | Noise measurement support device mounted at automobile exhaust port |
| CN204572037U (en) * | 2015-01-27 | 2015-08-19 | 安徽理工大学 | A kind of hydraulic support device |
| CN106297530A (en) * | 2016-11-03 | 2017-01-04 | 中国矿业大学(北京) | A kind of experiment feed screw nut controls formula synthetical support |
| CN107401419A (en) * | 2017-07-28 | 2017-11-28 | 西安科技大学 | A kind of coal-face physical simulation support with setting load |
| CN207245740U (en) * | 2017-07-28 | 2018-04-17 | 西安科技大学 | A kind of physical simulation stent with setting load |
| CN208330418U (en) * | 2018-06-27 | 2019-01-04 | 江西工业工程职业技术学院 | One kind is removable can to fix mining lifting support |
-
2019
- 2019-08-22 CN CN201910780188.9A patent/CN110566258A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2170373Y (en) * | 1993-07-31 | 1994-06-29 | 王永胜 | Swinging tail beam type hydraulic support for blasting down roof of coal mine |
| CN203362199U (en) * | 2013-07-05 | 2013-12-25 | 山西潞安环保能源开发股份有限公司 | End-head hydraulic support for fully mechanized mining face |
| CN203718326U (en) * | 2013-10-18 | 2014-07-16 | 北京汽车股份有限公司 | Noise measurement support device mounted at automobile exhaust port |
| CN204572037U (en) * | 2015-01-27 | 2015-08-19 | 安徽理工大学 | A kind of hydraulic support device |
| CN106297530A (en) * | 2016-11-03 | 2017-01-04 | 中国矿业大学(北京) | A kind of experiment feed screw nut controls formula synthetical support |
| CN107401419A (en) * | 2017-07-28 | 2017-11-28 | 西安科技大学 | A kind of coal-face physical simulation support with setting load |
| CN207245740U (en) * | 2017-07-28 | 2018-04-17 | 西安科技大学 | A kind of physical simulation stent with setting load |
| CN208330418U (en) * | 2018-06-27 | 2019-01-04 | 江西工业工程职业技术学院 | One kind is removable can to fix mining lifting support |
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Application publication date: 20191213 |