CN109707427A - Frame method and automatic chock moving type hydraulic bracket system are moved automatically under a kind of mine - Google Patents
Frame method and automatic chock moving type hydraulic bracket system are moved automatically under a kind of mine Download PDFInfo
- Publication number
- CN109707427A CN109707427A CN201811431302.9A CN201811431302A CN109707427A CN 109707427 A CN109707427 A CN 109707427A CN 201811431302 A CN201811431302 A CN 201811431302A CN 109707427 A CN109707427 A CN 109707427A
- Authority
- CN
- China
- Prior art keywords
- hydraulic support
- frame
- column
- stage
- drop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses move frame method and automatic chock moving type hydraulic bracket system under a kind of mine automatically, it include: hydraulic support passage detection system, hydraulic support passage detection system includes: the hydraulic support of at least one, the hydraulic support of at least one is arranged along coal working face, for supporting face roof, and bracket controller, the bracket controller is set on each hydraulic support, each bracket controller respectively with this hydraulic support pressure sensor, stroke sensor, angular transducer is connected with line-pressure sensor, to acquire this roof timbering pressure, elapse stroke, run posture and main line pressure data, bracket controller realizes the automatic control to hydraulic moving stand process by control program.Working face drop column efficiency can be improved in the present invention, just stops drop column process when that can move bracket, so that bracket is completed drop column using the shortest time, and reach relevant effect, and it is also short to drop the column time short then setting prop time.
Description
Technical field
The present invention relates to move automatically under mine underground hydraulic support frame intelligent control device technical field more particularly to a kind of mine
Frame method and automatic chock moving type hydraulic bracket system.
Background technique
Fully-mechanized mining working is arranged successively by more hydraulic supports in working face, realize to the support of face roof and
Migration to scratch board conveyor.The hydraulic support of working face is to be pushed away by the floating system of the weak constraint of scratch board conveyor in working face
During shifting, since hydraulic support is connect with scratch board conveyor by pin ear, there are gap, cause to exist in passage action process
Certain error, due to existing bracket controller program Solidification, setting control parameter be it is static, it is more not adapt to working face
The geological conditions of change, the equipment of gradual change and use environment, working face geology complicated condition, roof cracking, mine pressure is big, bottom plate pine
Soft, high inclination-angle, pump station pressure is insufficient, and electro hydraulic valve gradually blocks, insufficient pressure when multi rack moves at the same time.Therefore, one have it is quiet
The program of state and the control system of parameter, it is difficult to adapt to dynamic geological conditions, equipment and use environment, it is necessary to make hydraulic support
Automatic shifting frame control system have intelligent functions, be just able to satisfy the functional requirement that working surface hydraulic support moves frame automatically.
Summary of the invention
In order to solve the above technical problems, the present invention provides moves frame method and the hydraulic branch of automatic chock moving type under a kind of mine automatically
Frame system.
The present invention provides and moves frame method and automatic chock moving type hydraulic bracket system automatically under a kind of mine, using following technology
Scheme:
Automatic chock moving type hydraulic bracket system under a kind of mine, comprising:
Hydraulic support elapses detection system, and hydraulic support passage detection system includes:
The hydraulic support of at least one, the hydraulic support of at least one is arranged along coal working face, for supporting work
Make face top plate, and
Bracket controller, the bracket controller are set on each hydraulic support, each bracket controller respectively with this liquid
Pressure poppet pressure sensor, stroke sensor, angular transducer are connected with line-pressure sensor, to acquire this top plate branch
Frame pressure, passage stroke, operation posture and main line pressure data, bracket controller are realized by control program to hydraulic support
The automatic control of frame process is moved, and
Pressure sensor, the pressure sensor are set on each hydraulic support, for measuring the hydraulic support of execution movement
The liquid supply pressure of movement, and send neighbouring bracket controller to by support electrohydraulic control system communication network；Bracket control
The various parameters of device, threshold values can carry out dynamic adjustment according to the neighbouring main line pressure of working surface hydraulic support, and pressure is smaller,
Time parameter is then adjusted bigger, and pressure is bigger, then time parameter is then adjusted smaller, and
Stroke sensor, the trip sensor are used to measure the passage stroke of each hydraulic support, and
Angular transducer, the angular transducer are used to measure operation posture of hydraulic support during moving frame, and
Height sensor, the height sensor are used to measure the height of hydraulic support.
Frame method is moved automatically under a kind of mine of the invention, comprising the following steps:
S100: detection adjustment；
Before bracket movement, first the liquid supply pressure to hydraulic support is detected, differentiates whether liquid supply pressure becomes
Change, if variation, the equal proportion adjustment of control time parameter should be carried out according to the corresponding parameter adjustment law of historical data；
S200: drop column stage；
The column stage drops according to overall drop column time parameter one drop column overall time window of unlatching of setting, in this time
In window, then drop column process is divided into the small stage relay that several drop columns and is formed, each small drop column stage needs to stand
Column pressure declines a fixed amplitude, then opens and moves frame testing time window, and whether test can pull bracket, inspection
Survey whether stroke sensor value changes, if it is possible to pull bracket, just terminate drop column process and enter the shifting frame stage, otherwise close
It moves frame movement and its moves frame testing time window, the small stage of next drop column is continued to execute, until totally dropping column time window
The mouth time reaches, and terminates drop column, and rise frame report failure；
S300: the frame stage is moved；
A shifting frame overall time window is opened according to the overall drop column time parameter of setting, in this time window,
It executes and moves frame movement, real-time detection stroke sensor value during moving frame is opened when advancing velocity is less than setting advancing velocity
It opens small time window and carries out drop column, carry out moving work in drop, when its target value for reaching setting of stroke sensor value, or move
When frame overall time window reaches, terminate to move the frame stage；
S400: setting prop stage；
Top plate is supported completely.
Frame method is moved automatically under a kind of mine as claimed in claim 2, which is characterized in that in s 200, is entirely being dropped
The height of column stage real-time detection hydraulic support, the height fall of hydraulic support are not greater than the 3/4 of side guard plate height, when
When it is more than given value, it is immediately finished drop column process, and setting prop report failure.
Optionally, in S400, the setting prop stage is divided into 2 stages, and first stage makes hydraulic support reach initial support
State makes top plate reach holding state, and the adjacent frame in left and right, which can synchronize, at this time executes the automatic drop column movement for moving frame；Second stage
So that hydraulic support is reached setting load, completes the complete support to top plate；2 stages of setting prop open up respectively 2 time windows into
Row action control, real-time detection hydraulic support pressure sensor data are set according to the hydraulic support pressure sensor of setting
Target value carries out setting prop action control.
Optionally, it in S300, moves frame and encounters the soft occasion of bottom plate in the process, need to implement to drop column movement again, at this point,
Column time window is dropped again by given, terminates to drop again after making column decline the height value that one sets according to height sensor setting value
Column movement, then setting lift bottom actuation time window, opens the lift bottom movement of hydraulic support, lifts bottom actuation time window when reaching
When, terminate the lift bottom movement of hydraulic support.
Preferably, the operation posture that angular transducer real-time detection hydraulic support is used during moving frame, in hydraulic branch
When the posture of frame changes, the bottom tune using hydraulic support, side guard plate movement levelling hydraulic support operation posture are needed, it is made
It keeps keeping vertical relationship with drag conveyor.
Preferably, which is characterized in that if advancing velocity is less than the advancing velocity minimum value of setting during shifting frame,
Under the premise of overall drop pillar height degree field condition, it is again turned on a time window and carries out the synchronous drop column control of hydraulic support, when
When advancing velocity is greater than advancing velocity setting threshold value, terminate drop column movement.
Further embodiment is, according to the working condition of each hydraulic valve of hydraulic support appropriate regulating time parameter in real time, with
Guarantee movement can be made to arrive according to stroke sensor control according to when the control of hydraulic support pressure sensor, shifting frame when its lifting column
Position.
Compared with the relevant technologies, the present invention is had the following technical effect that
Working face drop column efficiency can be improved in the present invention, just stops drop column process when that can move bracket, makes bracket
Drop column is completed with the shortest time, and reaches relevant effect, and it is also short to drop the column time short then setting prop time, improves automatic
Advancing velocity；
The relevance of hydraulic support movement and its liquid-supplying system is realized, dynamic adjustment control time parameter is realized hydraulic
The coupling of bracket movement and liquid-supplying system；
Hydraulic support is improved to the adaptability of working face roof and floor condition, realizes hydraulic support movement and working face
The coupling of geological conditions；
Hydraulic support is improved to the adaptability of hydraulic valve state change, hydraulic support movement is realized and is set with working face
Standby coupling；
More hydraulic support movements detect working face main line pressure to the uncertainty of hydraulic support liquid-supplying system disturbance degree
Force value, and the automatic automatic adjustment for moving frame control parameter is carried out according to this, it realizes hydraulic support action parameter and multiple brackets is same
When dynamic liquid-supplying system ability coupling when acting；
It realizes the dynamic regulation of control parameter, realizes the coupling with changeable geological conditions, equipment and environment.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Below in conjunction with drawings and embodiments, the invention will be further described.
Fig. 1, automatic chock moving type hydraulic bracket system under a kind of mine of the invention are please referred to, hydraulic support elapses detection system
System includes hydraulic support, bracket controller, stroke sensor, pressure sensor, angular transducer, height sensor and pipeline pressure
Force snesor；Hydraulic support is arranged along coal working face, for supporting face roof, at least installs one on every hydraulic support
A pressure sensor, for measuring the top plate supporting pressure of hydraulic support；One stroke is at least installed to pass on every hydraulic support
Sensor, for measuring the passage stroke of each hydraulic support；One angular transducer is at least installed, for surveying on every hydraulic support
Measure operation posture of hydraulic support during moving frame；One height sensor is at least installed, for surveying on every hydraulic support
Measure the height of hydraulic support；Several line-pressure sensors are configured, on working face main line for measuring execution movement
The liquid supply pressure of hydraulic support movement, and send neighbouring bracket controller to by support electrohydraulic control system communication network；
On every hydraulic support install a bracket controller, each bracket controller respectively with this pressure sensor, stroke sensing
Device, angular transducer are connected with line-pressure sensor, to acquire this roof timbering pressure, passage stroke, run posture
With main line pressure data, bracket controller realizes the automatic control to hydraulic moving stand process by control program.
It moves frame intelligent control method automatically with hydraulic support, elapses detection system real-time detection liquid using above-mentioned hydraulic support
Passage state and top plate supporting state of the pressure bracket during moving frame automatically, automatic frame process of moving is by drop column stage, shifting frame rank
Section, setting prop stage three phases composition, drop column are mainly controlled according to detection pressure sensor state with the setting prop stage, move frame
Process is mainly controlled according to detection stroke sensor state, and each stage control program is by each sensor detection data
Real-time measurement values and bracket controller in the comparison of threshold value that is arranged and time control parameter determine its termination condition.
Drop the column stage: the drop column stage opens a drop column overall time window according to the overall drop column time parameter of setting,
In this time window, then drop column process is divided into the small stage relay that several drop columns and is formed, each small drop column rank
Whether section needs column pressure declining a fixed amplitude, then open and move frame testing time window, test and can
Bracket is pulled, whether detection stroke sensor value changes, if it is possible to pull bracket, just terminate drop column process and enter shifting frame rank
Otherwise section closes and moves frame movement and its move frame testing time window, the small stage of next drop column is continued to execute, until totality
The arrival of column time window time is dropped, terminates drop column, and rise frame report failure.
Meanwhile in the height of entirely drop column stage real-time detection hydraulic support, the height fall of hydraulic support must not
Greater than the 3/4 of side guard plate height, when it is more than given value, it is immediately finished drop column process, and setting prop report failure.
Move the frame stage: the shifting frame stage opens a shifting frame overall time window according to the overall drop column time parameter of setting,
In this time window, executes and move frame movement, real-time detection stroke sensor value during moving frame, when it reaches setting
Target value, or when shifting frame overall time window arrival, terminate to move the frame stage, into the setting prop stage.
It moves frame and encounters the soft occasion of bottom plate in the process, need to implement to drop column movement again.At this point, dropping the column time again for given
Window terminates to drop column movement again after making column decline the height value that one sets according to height sensor setting value, then be arranged
Bottom actuation time window is lifted, the lift bottom movement for opening hydraulic support terminates hydraulic support when reaching lift bottom actuation time window
Lift bottom movement.
Moving the frame stage, it is also necessary to the operation appearance of angular transducer real-time detection hydraulic support is used during moving frame
State needs the levelling of the component actuations such as the bottom tune using hydraulic support, side guard plate hydraulic when the posture of hydraulic support changes
Bracket runs posture, it is made to keep keeping vertical relationship with drag conveyor.
If advancing velocity is less than the advancing velocity minimum value of setting during moving frame, at totally drop pillar height degree scene
Under the premise of situation, it is again turned on a time window and carries out the synchronous drop column control of hydraulic support, move frame when advancing velocity is greater than
When threshold value is arranged in speed, terminate drop column movement.
The setting prop stage: the setting prop stage is divided into 2 stages, and first stage makes hydraulic support reach initial support state, makes
Top plate reaches holding state, and the adjacent frame in left and right, which can synchronize, at this time executes the automatic drop column movement for moving frame.Second stage makes hydraulic
Bracket reaches setting load, completes the complete support to top plate.2 stages of setting prop open up 2 time windows respectively and are acted
Control, real-time detection pressure sensor data carry out setting prop action control according to the target value that the pressure sensor of setting is set.
After 2nd stage of setting prop, a time window can be opened, implement pushing and sliding movement, eliminate hydraulic support with
The pin ear gap of drag conveyor moves frame for next frame and this subsequent pushing and sliding movement is laid a solid foundation.
The various parameters of bracket controller, threshold values can be moved according to the neighbouring main line pressure of working surface hydraulic support
State adjustment, pressure is smaller, and time parameter is then adjusted bigger, and pressure is bigger, then time parameter is then adjusted smaller.Meanwhile also
It can be according to the working condition of each hydraulic valve of hydraulic support appropriate regulating time parameter in real time, to guarantee that its is dynamic with sensor
Make in place, and adjusts the simple parameter by time control such as side guard plate according to equal proportion.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. automatic chock moving type hydraulic bracket system under a kind of mine characterized by comprising
Hydraulic support elapses detection system, and hydraulic support passage detection system includes:
The hydraulic support of at least one, the hydraulic support of at least one is arranged along coal working face, for supporting working face
Top plate, and
Bracket controller, the bracket controller are set on each hydraulic support, each bracket controller respectively with this hydraulic branch
Frame pressure sensor, stroke sensor, angular transducer are connected with line-pressure sensor, to acquire this roof timbering pressure
Power, passage stroke, operation posture and main line pressure data, bracket controller are realized by control program to hydraulic moving stand
The automatic control of process, and
Pressure sensor, the pressure sensor are set on each hydraulic support, for measuring the hydraulic support movement of execution movement
Liquid supply pressure, and send neighbouring bracket controller to by support electrohydraulic control system communication network；Bracket controller
Various parameters, threshold values can carry out dynamic adjustment according to the neighbouring main line pressure of working surface hydraulic support, and pressure is smaller, the time
Parameter is then adjusted bigger, and pressure is bigger, then time parameter is then adjusted smaller, and
Stroke sensor, the trip sensor are used to measure the passage stroke of each hydraulic support, and
Angular transducer, the angular transducer are used to measure operation posture of hydraulic support during moving frame, and
Height sensor, the height sensor are used to measure the height of hydraulic support.
2. frame method is moved under a kind of mine automatically, it is characterised in that the following steps are included:
S100: detection adjustment；
Before bracket movement, first the liquid supply pressure to hydraulic support is detected, differentiates whether liquid supply pressure changes, such as
Fruit variation should then carry out the equal proportion adjustment of control time parameter according to the corresponding parameter adjustment law of historical data；
S200: drop column stage；
The column stage drops according to overall drop column time parameter one drop column overall time window of unlatching of setting, in this time window
It is interior, then drop column process is divided into the small stage relay that several drop columns and is formed, each small drop column stage needs column pressure
Power declines a fixed amplitude, then opens and moves frame testing time window, and whether test can pull bracket, detection row
Whether journey sensor values changes, if it is possible to pull bracket, just terminate drop column process and enter the shifting frame stage, otherwise close and move frame
Movement and its shifting frame testing time window continue to execute the small stage of next drop column, when totally dropping column time window
Between reach, terminate drop column, and rise frame report failure；
S300: the frame stage is moved；
A shifting frame overall time window is opened according to the overall drop column time parameter of setting, in this time window, is executed
Frame movement is moved, real-time detection stroke sensor value during moving frame is opened small when advancing velocity is less than setting advancing velocity
Time window carry out drop column, carry out move work in drop, when its target value for reaching setting of stroke sensor value, or shifting frame are total
When body time window reaches, terminate to move the frame stage；
S400: setting prop stage；
Top plate is supported completely.
3. moving frame method automatically under a kind of mine as claimed in claim 2, which is characterized in that in s 200, in entirely drop column
The height of stage real-time detection hydraulic support, the height fall of hydraulic support is not greater than the 3/4 of side guard plate height, when it
When more than given value, it is immediately finished drop column process, and setting prop report failure.
4. moving frame method automatically under a kind of mine as claimed in claim 2, which is characterized in that in S400, the setting prop stage point
For 2 stages, first stage makes hydraulic support reach initial support state, and top plate is made to reach holding state, and left and right is adjacent at this time
Frame, which can synchronize, executes the automatic drop column movement for moving frame；Second stage makes hydraulic support reach setting load, completes to top plate
Support completely；2 stages of setting prop open up 2 time windows respectively and carry out action control, and real-time detection hydraulic support pressure passes
Sensor data carry out setting prop action control according to the target value that the hydraulic support pressure sensor of setting is set.
5. moving frame method automatically under a kind of mine as claimed in claim 2, which is characterized in that in S300, move during frame
The soft occasion of bottom plate is encountered, needs to implement to drop column movement again, at this point, column time window is dropped again by given, according to highly sensing
Device setting value terminates to drop column movement again after making column decline the height value that one sets, then setting lift bottom actuation time window,
The lift bottom movement for opening hydraulic support terminates the lift bottom movement of hydraulic support when reaching lift bottom actuation time window.
6. moving frame method automatically under a kind of mine as claimed in claim 5, which is characterized in that use angle during moving frame
The operation posture of sensor real-time detection hydraulic support is needed when the posture of hydraulic support changes using hydraulic support
Bottom tune, side guard plate movement levelling hydraulic support run posture, make it keep with drag conveyor keeping vertical relationship.
7. moving frame method automatically under a kind of mine as claimed in claim 5, which is characterized in that if moving frame speed during moving frame
When degree is less than the advancing velocity minimum value of setting, under the premise of totally dropping pillar height degree field condition, it is again turned on a time
Window carries out the synchronous drop column control of hydraulic support, when advancing velocity is greater than advancing velocity setting threshold value, terminates drop column movement.
8. moving frame method automatically under a kind of mine as described in claim 2-7 is any, which is characterized in that each according to hydraulic support
The working condition of hydraulic valve appropriate regulating time parameter in real time, according to hydraulic support pressure sensor control when guaranteeing its lifting column
It can make movement in place according to stroke sensor control when system, shifting frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431302.9A CN109707427A (en) | 2018-11-26 | 2018-11-26 | Frame method and automatic chock moving type hydraulic bracket system are moved automatically under a kind of mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431302.9A CN109707427A (en) | 2018-11-26 | 2018-11-26 | Frame method and automatic chock moving type hydraulic bracket system are moved automatically under a kind of mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109707427A true CN109707427A (en) | 2019-05-03 |
Family
ID=66255163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811431302.9A Withdrawn CN109707427A (en) | 2018-11-26 | 2018-11-26 | Frame method and automatic chock moving type hydraulic bracket system are moved automatically under a kind of mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109707427A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075489A (en) * | 2020-02-19 | 2020-04-28 | 太原理工大学 | Attitude description method for floating connection mechanism of hydraulic support and scraper conveyor |
| CN113420403A (en) * | 2021-03-24 | 2021-09-21 | 太原理工大学 | Movement planning method for pushing mechanism of hydraulic support and scraper conveyor |
| CN114611378A (en) * | 2022-01-31 | 2022-06-10 | 扬州来源液压设备有限公司 | Hydraulic support rod pressure regulation and control system based on mine industry Internet of things |
| CN114991844A (en) * | 2022-08-03 | 2022-09-02 | 太原向明智控科技有限公司 | Intelligent mining pressure data acquisition and statistics method for fully mechanized coal mining face of coal mine |
-
2018
- 2018-11-26 CN CN201811431302.9A patent/CN109707427A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075489A (en) * | 2020-02-19 | 2020-04-28 | 太原理工大学 | Attitude description method for floating connection mechanism of hydraulic support and scraper conveyor |
| CN113420403A (en) * | 2021-03-24 | 2021-09-21 | 太原理工大学 | Movement planning method for pushing mechanism of hydraulic support and scraper conveyor |
| CN114611378A (en) * | 2022-01-31 | 2022-06-10 | 扬州来源液压设备有限公司 | Hydraulic support rod pressure regulation and control system based on mine industry Internet of things |
| CN114991844A (en) * | 2022-08-03 | 2022-09-02 | 太原向明智控科技有限公司 | Intelligent mining pressure data acquisition and statistics method for fully mechanized coal mining face of coal mine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104747221B (en) | A kind of coal-mine hydraulic support moves frame intelligent control method automatically | |
| CN109707427A (en) | Frame method and automatic chock moving type hydraulic bracket system are moved automatically under a kind of mine | |
| CN109113771B (en) | Hydraulic support electrohydraulic self-adaptive control system based on BP neural network model | |
| AU2008351272B2 (en) | Method for controlling longwall mining operations | |
| CN201015073Y (en) | Large landslide physical model experiment system considering rainwater effect | |
| WO2019007439A1 (en) | Automatic height adjusting apparatus and method for shearer based on advanced detection of shearer seismic source | |
| CN105822259B (en) | Autocontrol method and plunger controller for the production of oil/gas well plunger lift | |
| CN109113741A (en) | Automatic coal discharge control system based on video monitor image recognition | |
| CN102680663A (en) | Water level automatic control system of landslide physical model test | |
| CN103018106A (en) | Experimental platform capable of simulating confined water load and baseboard breakage relation in controllable manner | |
| CN104674784B (en) | Side slope tidal level regulation device when hypergravity | |
| CN101952547A (en) | Method for automatically creating a defined face opening in longwall coal mining operations | |
| CN110082504B (en) | Simulation excavation box device, simulation experiment equipment and simulation experiment method | |
| CN105888723B (en) | Drainage arrangement from gas pressure measurement to layer-through drilling and method during a kind of lower | |
| CN103924995A (en) | Automatic tamping control system for filling stents | |
| CN109406754A (en) | Analogy method, the device and system of seam mining | |
| CN106523012A (en) | Scraper conveyor pushing structure for pitching oblique mining way of fully-mechanized coal mining face of sharp-inclined coal seam | |
| JP6271177B2 (en) | Underpinning system and underpinning method | |
| CN109488358A (en) | Movable-type intelligent advance support system and method for protecting support | |
| CN109192035A (en) | Extensional fault physical simulation experiment device and experimental method for Elevated Gravity | |
| CN108978496A (en) | A kind of bridge intelligence incremental launching construction system and its push construction method | |
| CN103592177B (en) | Fluid-wall interaction model test water level auto control system | |
| CN206876387U (en) | A kind of simulation test device for measuring basal disc and falling with soil interaction | |
| CN105571886B (en) | A kind of hydraulic support is coupled with country rock and automatic monitoring analog simulation experiment shelf and method | |
| CN109139075A (en) | Hydraulic support is with the automatic pushing and sliding method of machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190503 |
|
| WW01 | Invention patent application withdrawn after publication |