CN114033494A - Simulation test system and test method based on top coal caving - Google Patents
Simulation test system and test method based on top coal caving Download PDFInfo
- Publication number
- CN114033494A CN114033494A CN202111212281.3A CN202111212281A CN114033494A CN 114033494 A CN114033494 A CN 114033494A CN 202111212281 A CN202111212281 A CN 202111212281A CN 114033494 A CN114033494 A CN 114033494A
- Authority
- CN
- China
- Prior art keywords
- coal
- caving
- platform
- baffle plate
- gangue
- 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.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/27—Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
Abstract
The invention discloses a simulation test system and a test method based on top coal caving, which comprises the following steps: a base; the platform is connected with the base through a plurality of telescopic devices, wherein the telescopic devices can independently or synchronously do telescopic motion; the material storage box is fixedly connected to the upper end face of the platform and at least provided with a feeding port and a discharging port; the pushing assembly is arranged along the longitudinal direction of the platform and is movably coupled with the platform relatively, and is used for pushing the top coal in the storage box out of the discharge port, wherein the pushing assembly is provided with a weighing sensor used for weighing the pushed top coal; the supporting component is provided with a coal baffle plate, the coal baffle plate is obliquely arranged at the lower end of the discharge port, and a vibration sensor and a sound sensor are arranged on the coal baffle plate; and the conveying assembly is arranged at the lower end of the coal baffle plate and is used for conveying the top coal in the transverse direction. The top coal caving simulation test system provides a theoretical basis for realizing intelligent coal caving on site.
Description
Technical Field
The invention relates to the technical field of caving coal mining, in particular to a caving coal based simulation test system and a test method.
Background
The reserves of the thick coal seams of the coal resources in China are quite rich and account for 45 percent of the reserved amount of the coal which is already found, the yield of the thick coal seams accounts for 40 to 50 percent of the total yield, and the reasonable development of the thick coal seams has important influence on the development of the coal industry in China. The top coal caving mining method is that in a thick coal seam, a longwall working face with the mining height of 2 m-3 m is arranged along the bottom of the coal seam, the mining is carried out by using a comprehensive mechanical coal mining process, and top coal is crushed into discrete bodies by using the action of mine pressure or assisting methods such as loosening blasting and the like, discharged through a coal discharging window at the rear or above a support and conveyed out of the working face by a rear scraper conveyor. The comprehensive mechanized top coal caving mining is a thick coal seam mining mode with high yield, high efficiency, low consumption and strong adaptability, so the research and popularization of the top coal caving technology have particularly important significance for the development of the coal industry in China. However, how to determine the coal caving time of the coal caving opening according to the coal caving degree is a difficult problem in the process of realizing intelligent mining of fully mechanized top coal caving, and the top coal caving is judged and controlled by manual visual inspection at present. The safety problem of field operation workers is prominent due to the fact that the dust of a coal face is large and the conditions are severe, and the caving degree of top coal is difficult to accurately judge by manpower, so that the over-caving and under-caving conditions are inevitably caused in the coal caving process. Furthermore, as the yield of the coal face increases, the hydraulic support moving speed needs to be increased, and an effective method for increasing the moving speed is to adopt an automatic program control electro-hydraulic top coal caving support to replace a manual top coal caving support. The method for judging the caving degree of the top coal by manual visual inspection and manually controlling the opening and closing of the coal caving port is not suitable for the operation requirement of the electro-hydraulic top coal caving support any more. Therefore, the automatic identification of the coal and gangue interface becomes a key technology for controlling the coal caving time, is the basis for realizing the automatic control of the opening and closing of the coal caving port and perfecting the automation and intellectualization of the top coal caving mining, and is an important means for improving the coal mining rate, improving the coal quality and reducing the mining cost.
With the advance of the intelligent development process of coal mines in China, in order to realize unmanned production of the fully mechanized top coal caving working face, the comprehensive acquisition and accurate analysis of coal caving information of the fully mechanized top coal caving working face must be achieved, and the bottleneck problem of coal gangue identification in the fully mechanized top coal caving process can be effectively solved on the basis of the comprehensive acquisition and accurate analysis. At present, aiming at the coal and gangue identification technology of the fully mechanized top coal caving technology, the technology mainly comprises an artificial gamma ray, a natural gamma ray, a vibration identification technology, a laser dust photography, an image information processing technology, a video shooting technology and the like. Although the above coal and gangue interface identification methods all achieve certain results, because the underground environment is very complex, it is difficult to accurately judge the coal and gangue boundary by analyzing with a single technical means, and the actual application effect is not ideal. And the existing coal and gangue identification method has poorer adaptability due to the influence of factors such as the variability of geological environment of the fully mechanized top coal caving working face, the diversity of coal caving process parameters, the complexity of equipment types of the working face and the like. Therefore, in order to comprehensively collect parameter information in the coal caving process, it is urgently needed to develop a top coal caving simulation device capable of simulating the complex conditions, and research a coal and gangue identification technology with higher adaptability based on the top coal caving simulation device.
Disclosure of Invention
The present invention is directed to the above-mentioned problems and needs, and an object of the present invention is to provide a simulation test system and a test method based on top coal caving, which can achieve the above-mentioned technical objectives and bring other technical effects due to the following technical features.
The invention also aims to provide a test method based on the caving coal simulation test system.
According to a first aspect of the invention, a simulation test system based on caving coal comprises:
a base;
the platform is connected with the base through a plurality of telescopic devices, wherein the telescopic devices can independently or synchronously perform telescopic motion;
the material storage box is fixedly connected to the upper end face of the platform and at least provided with a feeding port and a discharging port;
the pushing assembly is arranged along the longitudinal direction of the platform and is movably coupled with the platform relatively, and is used for pushing the top coal in the storage box out of the discharge port, wherein the pushing assembly is provided with a weighing sensor used for weighing the pushed top coal;
the supporting assembly is provided with a coal baffle plate, the coal baffle plate is obliquely arranged at the lower end of the discharge port, and a vibration sensor and a sound sensor are arranged on the coal baffle plate;
the conveying assembly is arranged at the lower end of the coal baffle plate and is used for conveying the top coal falling from the supporting assembly in the transverse direction;
the telescopic device is provided with an infrared high-speed camera for shooting image information of top coal falling to the coal baffle plate from the discharge port.
In an example of the invention, a baffle is further configured on one side of the platform; one end of the baffle is movably connected with the base, and the other end of the baffle protrudes out of the upper end face of the platform;
a plurality of limiting clamping grooves corresponding to the motion trail of the platform are arranged on the baffle outside the inserting groove;
the platform is suitable for being provided with a limiting block matched with the limiting clamping groove;
wherein, a plurality of spacing draw-in groove is for equidistant radian setting between.
In one example of the invention, the base is provided with a plug-in slot, and the baffle is suitable for being plugged into the plug-in slot;
when the plurality of telescopic devices simultaneously perform telescopic motion, the baffle plate can perform telescopic motion relative to the insertion groove;
when a plurality of the telescopic devices independently do telescopic motion, the baffle plate can do rotary motion relative to the insertion groove.
In one example of the invention, the push component comprises:
a cover plate arranged along a longitudinal direction of the platform and slidably coupled with the platform;
a driving member adapted to be coupled with the cover plate for driving the cover plate to reciprocate along the longitudinal direction.
In one example of the invention, a pull rod is arranged along the longitudinal direction of the platform, and the cover plate and the pull rod are coupled in a relatively sliding manner;
wherein one end of the driving piece is connected with the cover plate, and the other end of the driving piece is connected with the platform.
In one example of the present invention, the pushing assembly includes a plurality of pushing assemblies, and the plurality of pushing assemblies are arranged on the platform at intervals in the lateral direction.
In one example of the present invention, the support assembly further comprises:
one end of the coal baffle plate is hinged with the protective frame;
one end of the supporting rod is hinged with the other end of the coal baffle plate, and the other end of the supporting rod is hinged with the protective frame.
In one example of the present invention, the support bar includes: a first sleeve, a second sleeve and a telescopic rod,
the first sleeve is hinged with the coal baffle plate or the protective frame, and the second sleeve is hinged with the protective frame or the coal baffle plate;
the telescoping rod is adjustably coupled between the first and second sleeves to lengthen or shorten the length of the strut.
In one example of the present invention, the telescopic rod comprises: a first screw rod, a second screw rod and a knob,
the knob is fixedly connected with the first screw rod and the second screw rod;
the first sleeve is provided with a first threaded hole, and the first screw rod is matched with the first threaded hole;
the second sleeve is provided with a second threaded hole, and the second screw rod is matched with the second threaded hole;
the first threaded hole and the second threaded hole are opposite in rotation direction, and the first screw rod and the second screw rod are opposite in rotation direction.
According to a second aspect of the invention, a simulation test method based on caving coal comprises the following steps:
s10: calculating and determining the parameter proportion and the size of the simulated rock stratum according to a single variable required to be controlled in an experiment and specific experiment conditions and field conditions; through measurement and experiments of a field coal gangue sample, selecting a proper discrete material as an experimental material according to experimental requirements to simulate broken top coal and gangue;
s20: designing mining conditions of a coal seam structure, a gangue type and a gangue content according to an experimental scheme, and paving discrete materials in a storage box according to the thickness and the sequence set by the experimental scheme to simulate a broken coal seam and a direct roof, wherein the top coal gangue is selected into three grades with different particle sizes;
s30: the simulation of the coal caving process of different coal caving modes of single-wheel sequential coal caving, multi-wheel sequential coal caving, single-wheel interval coal caving and multi-wheel interval coal caving is realized by controlling at least one pushing assembly;
s40: the platform is adjusted to tilt by controlling a single telescopic device, so that the coal caving process of the inclined coal seam is simulated;
s50: in the coal caving process, the weighing sensor is started in real time, the weight of the storage box is weighed in real time along with the coal caving process, the obtained data is displayed and stored in real time through the quality display instrument, and the quality change rule of the coal and gangue boundary in the coal caving process is observed and analyzed; meanwhile, the infrared high-speed camera arranged on the coal blocking plate records coal and gangue image information, the vibration sensor records vibration response generated when the coal and gangue impact the coal blocking plate, and the sound sensor collects sound wave signals generated when the coal and gangue impact the coal blocking plate.
Compared with the prior art, the invention has the following technical effects:
the top coal caving simulation test system has the following beneficial effects:
(1) the invention utilizes the top coal caving simulation test system, not only effectively simulates the information source for identifying the coal and gangue in the coal caving process, but also makes the information source clearer and more effective, is beneficial to collecting the coal and gangue characteristics in the coal caving test, is convenient for further data processing and analysis, and provides a theoretical basis for realizing intelligent coal caving on site.
(2) The top coal caving simulation test system can simulate the actual coal caving situation on site under different variable conditions such as a rock stratum structure (coal bed inclination angle, coal bed gangue inclusion and gangue inclusion rate), a mining-discharge ratio, a coal caving process and the like, the test variables are diversified, the control of the test process is accurate, and different test requirements can be met.
(3) The invention constructs a caving coal multi-dimensional data acquisition system to acquire vibration information, sound wave information, image information and weight information in the coal caving process in real time. And extracting the features of the extracted multi-dimensional information, and training and classifying the extracted multi-dimensional information through a machine learning algorithm to realize the accurate identification of the coal and gangue proportion in the coal caving process. The test parameters are comprehensive, and the prediction result is more accurate.
The test method of the top coal caving simulation test system has the following beneficial effects:
(i) the invention utilizes the top coal caving simulation test method, not only effectively simulates the information source for identifying the coal and gangue in the coal caving process, but also makes the information source clearer and more effective, is beneficial to collecting the coal and gangue characteristics in the coal caving test, is convenient for further data processing and analysis, and provides a theoretical basis for realizing intelligent coal caving on site.
(ii) The top coal caving simulation test method can realize the simulation of the actual coal caving situation on site under different variable conditions of a rock stratum structure (coal bed inclination angle, coal bed gangue inclusion and gangue inclusion rate), a mining-discharge ratio, a coal caving process and the like, the test variables are diversified, the control of the test process is accurate, and different test requirements can be met.
(iii) The testing method provided by the invention is used for acquiring vibration information, sound wave information, image information and weight information in the coal caving process in real time by constructing a multi-dimensional data acquisition system for the top coal caving. And extracting the features of the extracted multi-dimensional information, and training and classifying the extracted multi-dimensional information through a machine learning algorithm to realize the accurate identification of the coal and gangue proportion in the coal caving process. The test parameters are comprehensive, and the prediction result is more accurate.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the invention and are not to be construed as limiting the invention to all embodiments thereof.
FIG. 1 is a schematic structural diagram of a simulation test system based on top coal caving according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a platform and a baffle according to an embodiment of the invention;
FIG. 3 is a schematic view of a baffle structure according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a support assembly according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a support rod according to an embodiment of the present invention.
List of reference numerals:
a test system 100;
a base 10;
an insertion groove 11;
a platform 20;
a rotating shaft 21;
a telescoping device 30;
a baffle 40;
a fillet 41;
a limit clamp slot 42;
a material storage tank 50;
a feeding port 51;
a discharge opening 52;
a push assembly 60;
a load cell 61;
a cover plate 62;
a pull rod 63;
a support assembly 70;
a coal deflector 71;
a protective frame 72;
a support rod 73;
a first sleeve 731;
a second sleeve 732;
an expansion link 733;
a first screw 7331;
a second screw 7332;
a knob 7333;
a vibration sensor 74;
a sound sensor 75;
an infrared high-speed camera 76;
a delivery assembly 80;
a controller 90.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
A simulation test system 100 based on caving coal according to a first aspect of the present invention, as shown in fig. 1 to 4, comprises:
a base 10;
the platform 20 is connected with the base 10 through a plurality of telescopic devices 30, and a baffle 40 is fixedly arranged on one side edge of the platform 20; wherein, one end of the baffle 40 is movably connected with the base 10, and the other end thereof protrudes out of the upper end surface of the platform 20; wherein a plurality of said telescopic devices 30 can make telescopic motion independently or synchronously;
a storage tank 50 fixedly connected to the upper end surface of the platform 20 and having at least a feeding port 51 and a discharging port 52;
at least one pushing assembly 60 arranged along the longitudinal direction of the platform 20 and coupled with the platform 20 in a relatively movable manner for pushing the top coal located in the storage bin 50 out of the discharge opening 52, wherein the pushing assembly 60 is provided with a weighing sensor 61 for weighing the pushed top coal;
a support assembly 70 having a coal baffle plate 71, wherein the coal baffle plate 71 is obliquely arranged at the lower end of the discharge opening 52, and a vibration sensor 74 and a sound sensor 75 are arranged on the coal baffle plate 71;
a conveying assembly 80 disposed at a lower end of the coal deflector 71 for conveying the top coal dropped by the support assembly 70 in a lateral direction;
wherein, an infrared high-speed camera 76 for shooting the image information of the top coal falling from the discharge opening 52 to the coal baffle plate 71 is arranged on the telescopic device 30.
The pushing assembly 60 pushes the coal in the storage box 50 to the discharge port 52 to simulate the coal caving process, and simultaneously, the platform 20 tilts by asynchronous stretching of the stretching device 30 to simulate the inclined coal caving process, so that the top coal falls onto the coal baffle plate 71 of the supporting assembly 70 and then onto the conveying assembly 80, and the conveying assembly 80 conveys the top coal to two sides; in the process, the weighing sensor 61 on the pushing assembly 60 is used for weighing the top coal in real time, so that the mass change rule of the coal and gangue boundary in the coal caving process can be conveniently obtained; acquiring vibration signals, sound wave signals and image information of the coal by a vibration sensor 74, a sound sensor 75 and an infrared high-speed camera 76 respectively; the top coal caving simulation test system 100 not only effectively simulates information sources for coal and gangue identification in the coal caving process, but also makes the information sources clearer and more effective, is beneficial to collecting coal and gangue characteristics in the coal caving test, is convenient for further data processing and analysis, and provides a theoretical basis for realizing intelligent coal caving on site; the simulation of the actual coal caving situation on site under different variable conditions such as a rock stratum structure (coal bed inclination angle, coal bed gangue inclusion and gangue inclusion rate), a mining-discharge ratio, a coal caving process and the like can be realized, the test variables are diversified, the control of the test process is accurate, and different test requirements can be met; meanwhile, vibration information, sound wave information, image information and weight information during the coal caving process are collected in real time. And extracting the features of the extracted multi-dimensional information, and training and classifying the extracted multi-dimensional information through a machine learning algorithm to realize the accurate identification of the coal and gangue proportion in the coal caving process. The test parameters are comprehensive, and the prediction result is more accurate.
In one example of the present invention, a baffle 40 is further disposed on one side of the platform 20; wherein, one end of the baffle 40 is movably connected with the base 10, and the other end thereof protrudes out of the upper end surface of the platform 20;
a plurality of limiting clamping grooves 42 corresponding to the motion trail of the platform 20 are arranged on the baffle 40 outside the inserting groove 11; for example, as shown in fig. 3, a fan-shaped arc is arranged at a corner of the baffle 40, and the limiting clamping groove 40 is arranged on the fan-shaped arc;
wherein, a limit block matched with the limit block slot 42 is suitable to be configured on the platform 20; specifically, the movable block may be movably disposed in the limiting slot 42, for example, an insertion hole is disposed on the platform 20, the limiting block is inserted into the insertion hole, and when the platform 20 rotates to the designated limiting slot 42, the limiting block is sequentially inserted into the limiting slot 42 and the insertion hole through the insertion block; it should be noted that when the platform 20 rotates, the stopper needs to be removed from the socket.
The plurality of limiting clamping grooves 42 are arranged at equal intervals in a radian manner;
the baffle 40 can maintain the state of the platform 20 after the platform 20 tilts, so that the platform 20 can reliably simulate the working condition.
For example, a limit slot 42 is arranged on one side of the baffle 40, the limit slot 42 is arranged at the fan-shaped position of the baffle 40 at intervals of a fixed angle, and there are six positions in total, that is, the tilt angle of the platform 20 of 5 ° can be adjusted when the telescopic device 30 rotates upwards once; the inclination angle between the platform 20 and the storage box 50 can be adjusted by 0-30 degrees through the limiting clamping groove 42, so that the top coal dropping process of different coal seam structures can be simulated; the limiting clamping groove 42 can also be used for quantitative marking to play a role in calibration; it should be noted that, in the present invention, the limit slot 42 is disposed at one end side of the platform 20 where the rotating shaft 21 is not disposed.
In an example of the present invention, the base 10 is configured with a plug slot 11, and the baffle 40 is adapted to be plugged into the plug slot 11;
when a plurality of the telescopic devices 30 perform telescopic motion simultaneously, the baffle plate 40 can perform telescopic motion relative to the insertion groove 11;
when a plurality of the telescopic devices 30 independently perform telescopic movement, the baffle plate 40 can perform rotary movement relative to the insertion groove 11;
that is, when the plurality of telescopic devices 30 are simultaneously moved telescopically, the barrier 40 can be moved telescopically up and down in the insertion groove 11 along with the platform 20; when the plurality of telescopic devices 30 are independently moved, for example, the telescopic device 30 located at one side in the transverse direction is extended, and the telescopic device 30 located at the other side in the transverse direction is not moved, the baffle 40 can realize a side deflection movement which is not acted around the telescopic device 30 in the inserting groove 11; it is worth to be noted that, at this time, a rotating shaft 21 is disposed at one non-operating end; tilting of the platform 20 to simulate tilting coal caving can be achieved by the above described movement pattern. For example, in the present invention, only one end of the rotating shaft 21 may be provided.
It should be noted that, because the baffle 40 needs to rotate along with the platform 20 in addition to the up-and-down telescopic motion of the platform 20 in the inserting slot 11, the width of the inserting slot 11 in the transverse direction is larger than that of the baffle 40 in the transverse direction, so as to avoid the baffle 40 being locked to influence the swing of the baffle 40.
It should be noted that, when the blocking plate 40 rotates in the insertion slot 11, the corner in the blocking plate 40 preferentially contacts with the inner wall of the insertion slot 11, and once the blocking plate 40 contacts or is locked in the insertion slot 11, the rounded corner is disposed at the corner of the blocking plate 40 in the insertion slot 11 to prevent the blocking plate 40 from being locked during the rotation.
In one example of the present invention, the pushing assembly 60 comprises:
a cover plate 62 disposed along a longitudinal direction of the platform 20 and slidably coupled with the platform 20;
a driving member adapted to be coupled with the cover plate 62 for driving the cover plate 62 to reciprocate along the longitudinal direction;
that is, the cover plate 62 driven by the driving member to reciprocate in the longitudinal direction can discharge the top coal in the storage bin 50 through the discharge opening 52 to simulate the coal caving process. For example, the driving member is a telescopic cylinder, and the cover plate 62 is driven to reciprocate in the longitudinal direction by the telescopic movement of the telescopic cylinder.
In one example of the present invention, a tie bar 63 is disposed along a longitudinal direction of the platform 20, and the cover plate 62 and the tie bar 63 are coupled to be relatively slidable;
wherein one end of the driving member is coupled to the cover plate 62, and the other end thereof is coupled to the platform 20;
specifically, each cover plate 62 corresponds to two pull rods 63, and is disposed on two sides of the cover plate 62 in the transverse direction, for each pull rod 63, two ends along the longitudinal direction of the platform 20 are respectively provided with a base (not shown in the figure), two ends of the pull rod 63 are respectively fixedly connected with the two bases, and the cover plate 62 is respectively connected with the pull rod 63 through a sliding sleeve, when the driving member is a telescopic member, a cylinder body thereof is fixedly connected with the platform 20, a telescopic rod thereof is connected with the cover plate 62, the cover plate 62 is driven by the driving member to reciprocate along the pull rod 63 in the longitudinal direction, wherein the driving member can be a hydraulic cylinder, an air cylinder, an electric push rod, and the like.
Of course, the present invention is not limited to this, at least two pull rods 63 are rotatably disposed along the longitudinal direction of the platform 20, the cover plate 62 is coupled with the pull rods 63 through screw nuts, that is, external threads are formed on the outer walls of the pull rods 63, the pull rods 63 are configured with nuts matched with the external threads, two sides of the cover plate 62 are fixedly coupled with the nuts respectively, that is, the screw nuts are coupled, at this time, the driving member is a driving motor, the driving motor drives the pull rods 63 to rotate, it is worth describing that the pull rods 63 are pivotably coupled with the platform 20 through bases disposed along the longitudinal direction, that is, the pull rods 63 are pivotably coupled with the bases, and the bases are fixed on the platform. The above structure also enables the pushing assembly 60 to simulate the coal caving process.
Of course, the spout has been arranged along the longitudinal direction of platform 20, be configured with on the apron 62 with the slider of spout looks adaptation, the driving piece is the extensible member this moment, by extensible member drive apron 62 at longitudinal direction reciprocating motion, and the spout on the platform 20 runs through along the longitudinal direction of platform 20 to make things convenient for apron 62 to be dismantled by on the platform 20, be convenient for wash the coal petrography granule that accumulates between apron 62 and the platform 20 crack.
In one example of the present invention, the pushing assembly 60 includes a plurality, and the plurality of pushing assemblies 60 are arranged on the platform 20 at intervals in the lateral direction;
the simulation of the coal caving process of different coal caving modes of single-wheel sequential coal caving, multi-wheel sequential coal caving and single-wheel interval coal caving can be realized by arranging a plurality of pushing assemblies 60; wherein, the single-wheel sequential coal caving means that the pushing components 60 move from side to side in sequence along the transverse direction; the multi-wheel sequential coal caving means that a plurality of pushing assemblies 60 (for example, two pushing assemblies 60) in the transverse direction synchronously act sequentially from one side to the other side; single round of alternate coal discharge refers to the sequential movement of the pushing assemblies 60 in the lateral direction from side to side (e.g., one pushing assembly 60 apart).
In one example of the present invention, as shown in fig. 4, the support assembly 70 further includes:
one end of the coal baffle plate 71 is hinged with the protective frame 72;
one end of the supporting rod 73 is hinged with the other end of the coal baffle plate 71, and the other end of the supporting rod is hinged with the protective frame 72;
wherein, the support rod 73 is a telescopic structure;
that is, the coal deflector 71 can be obliquely disposed through the protective frame 72 and the support rod 73, and the inclination angle of the coal deflector 71 can be adjusted through the support rod 73 having a telescopic structure, so as to better acquire the vibration signal and the sound signal.
In one example of the present invention, the support rod 73 includes: a first sleeve 731, a second sleeve 732 and a telescopic bar 733,
the first sleeve 731 is hinged with the coal baffle plate 71 or the protection frame 72, and the second sleeve 732 is hinged with the protection frame 72 or the coal baffle plate 71; for example, the first sleeve 731 is hingedly coupled to the coal deflector 71, and the second sleeve 732 is hingedly coupled to the protective frame 72.
The telescopic bar 733 is adjustably coupled between the first sleeve 731 and the second sleeve 732 to lengthen or shorten the length of the supporting bar 73;
the distance between the first sleeve 731 and the second sleeve 732 can be adjusted by adjusting the telescopic rod 733 to change the inclination angle of the coal deflector 71, so as to better obtain the vibration signal and the sound signal.
In an example of the present invention, as shown in fig. 5, the telescopic bar 733 includes: a first screw 7331, a second screw 7332, and a knob 7333,
the knob 7333 is fixedly coupled with the first screw 7331 and the second screw 7332;
the first sleeve 731 is provided with a first threaded hole, and the first screw 7331 is matched with the first threaded hole;
the second sleeve 732 is provided with a second threaded hole, and the second screw 7332 is matched with the second threaded hole;
wherein the first threaded hole and the second threaded hole have opposite rotation directions, and the first screw 7331 and the second screw 7332 have opposite rotation directions;
that is, rotating the knob 7333 turns the first and second screw rods 7331 and 7332 in a positive direction, thereby moving the first and second sleeves 731 and 732 away from each other; rotating the knob 7333 rotates the first and second screws 7331 and 7332 in opposite directions, so that the first and second bushings 731 and 732 approach each other, thereby adjusting the inclination angle of the blocking plate 40.
In another example of the present invention, two ends of the telescopic rod 733 are respectively provided with a first positioning hole and a third positioning hole, a plurality of second positioning holes are arranged at intervals along the extending direction of the first sleeve 731, a plurality of fourth positioning holes are arranged at intervals along the extending direction of the second sleeve 732, wherein the first positioning hole is adapted to be matched with any one of the second positioning holes, the third positioning hole is adapted to be matched with any one of the fourth positioning holes, a first positioning pin penetrates through the first positioning hole and the second positioning hole, and a second positioning pin penetrates through the third positioning hole and the fourth positioning hole; the length of the support rod 73 can be adjusted through the above mode, so that the inclination angle of the coal baffle plate 71 can be adjusted.
In one example of the present invention, the assay system 100 further comprises: and a controller 90 coupled to the telescoping device 30, the pushing assembly 60 and the conveying assembly 80 for controlling the telescoping device 30, the pushing assembly 60 and the conveying assembly 80 to perform corresponding actions. It is noted that the load cell 61, the vibration sensor 74, the sound sensor 75, and the infrared high-speed camera 76 are also coupled to the controller 90 for storing information collected by the above devices for later processing and analysis.
Specifically, firstly, the top coal is placed into the storage box 50 through the feeding port 51, the controller 90 controls the pushing assembly 60 to push the top coal in the storage box 50 to the discharging port 52 to simulate the coal caving process (the controller 90 can control the pushing assembly 60 to simulate the coal caving process of different coal caving modes of single-wheel sequential coal caving, multi-wheel sequential coal caving and single-wheel interval coal caving), and simultaneously, the asynchronous stretching of the stretching device 30 can be controlled to enable the platform 20 to incline to simulate the inclined coal caving process, the top coal falls onto the coal baffle plate 71 of the supporting assembly 70 and then falls onto the conveying assembly 80, and then the controller 90 controls the conveying assembly 80 to convey the top coal to one of two sides in the transverse direction; in the process, the weighing sensor 61 on the pushing assembly 60 is used for weighing the top coal in real time, so that the mass change rule of the coal and gangue boundary in the coal caving process can be conveniently obtained; acquiring vibration signals, sound wave signals and image information of the coal by a vibration sensor 74, a sound sensor 75 and an infrared high-speed camera 76 respectively; the top coal caving simulation test system 100 not only effectively simulates information sources for coal and gangue identification in the coal caving process, but also makes the information sources clearer and more effective, is beneficial to collecting coal and gangue characteristics in the coal caving test, is convenient for further data processing and analysis, and provides a theoretical basis for realizing intelligent coal caving on site; the simulation of the actual coal caving situation on site under different variable conditions such as a rock stratum structure (coal bed inclination angle, coal bed gangue inclusion and gangue inclusion rate), a mining-discharge ratio, a coal caving process and the like can be realized, the test variables are diversified, the control of the test process is accurate, and different test requirements can be met; meanwhile, vibration information, sound wave information, image information and weight information during the coal caving process are collected in real time. And extracting the features of the extracted multi-dimensional information, and training and classifying the extracted multi-dimensional information through a machine learning algorithm to realize the accurate identification of the coal and gangue proportion in the coal caving process. The test parameters are comprehensive, and the prediction result is more accurate.
According to a second aspect of the invention, a simulation test method based on caving coal comprises the following steps:
s10: calculating and determining the parameter proportion and the size of the simulated rock stratum according to a single variable required to be controlled in an experiment and specific experiment conditions and field conditions; through measurement and experiments of a field coal gangue sample, selecting a proper discrete material as an experimental material according to experimental requirements to simulate broken top coal and gangue;
s20: designing mining conditions such as a coal seam structure, a gangue type and a gangue content according to an experimental scheme, paving discrete materials in the storage box 50 according to the thickness and the sequence set by the experimental scheme to simulate a broken coal seam and a direct roof, and selecting three grades with different particle sizes for the top coal gangue;
s30: the simulation of the coal caving process of different coal caving modes of single-wheel sequential coal caving, multi-wheel sequential coal caving, single-wheel interval coal caving and multi-wheel interval coal caving is realized by controlling at least one pushing assembly 60;
s40: the platform 20 is adjusted to perform inclined motion by controlling the single telescopic device 30, so that the coal caving process of the inclined coal seam is simulated;
s50: in the coal caving process, the weighing sensor 61 is started in real time, the weight of the storage box 50 is weighed in real time along with the coal caving process, the obtained data is displayed and stored in real time through the quality display instrument, and the quality change rule of the coal and gangue boundary in the coal caving process is observed and analyzed; meanwhile, the infrared high-speed camera 76 arranged on the coal baffle plate 71 records the image information of coal and gangue, the vibration sensor 74 records the vibration response generated when the coal and gangue collide with the coal baffle plate 71, and the sound sensor 75 collects the sound wave signals generated when the coal and gangue collide with the coal baffle plate 71.
The invention utilizes the top coal caving simulation test method, not only effectively simulates the information source for identifying the coal and gangue in the coal caving process, but also makes the information source clearer and more effective, is beneficial to collecting the coal and gangue characteristics in the coal caving test, is convenient for further data processing and analysis, and provides a theoretical basis for realizing intelligent coal caving on site.
The top coal caving simulation test method can realize the simulation of the actual coal caving situation on site under different variable conditions of a rock stratum structure (coal bed inclination angle, coal bed gangue inclusion and gangue inclusion rate), a mining-discharge ratio, a coal caving process and the like, the test variables are diversified, the control of the test process is accurate, and different test requirements can be met.
The invention constructs a caving coal multi-dimensional data acquisition system to acquire vibration information, sound wave information, image information and weight information in the coal caving process in real time. And extracting the features of the extracted multi-dimensional information, and training and classifying the extracted multi-dimensional information through a machine learning algorithm to realize the accurate identification of the coal and gangue proportion in the coal caving process. The test parameters are comprehensive, and the prediction result is more accurate.
While an exemplary embodiment of the present invention based on a caving coal simulation test system 100 has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that various modifications and changes can be made to the specific embodiments described above without departing from the concept of the present invention, and various combinations of the technical features and structures presented in the present invention can be made without departing from the scope of the present invention as defined in the appended claims.
Claims (10)
1. A simulation test system based on caving coal, characterized by comprising:
a base (10);
the platform (20) is connected with the base (10) through a plurality of telescopic devices (30), wherein the telescopic devices (30) can independently or synchronously do telescopic motion;
a storage tank (50) fixedly connected to the upper end surface of the platform (20) and at least provided with a feeding port (51) and a discharging port (52);
at least one pushing assembly (60) arranged along the longitudinal direction of the platform (20) and coupled with the platform (20) in a relatively movable manner for pushing the top coal located in the storage bin (50) out of the discharge opening (52), wherein the pushing assembly (60) is provided with a weighing sensor (61) for weighing the pushed top coal;
the supporting assembly (70) is provided with a coal baffle plate (71), the coal baffle plate (71) is obliquely arranged at the lower end of the discharge port (52), and a vibration sensor (74) and a sound sensor (75) are arranged on the coal baffle plate (71);
a conveying assembly (80) which is arranged at the lower end of the coal baffle plate (71) and is used for conveying the top coal falling from the supporting assembly (70) in the transverse direction;
wherein, an infrared high-speed camera (76) for shooting the image information of the top coal falling from the discharge opening (52) to the coal baffle plate (71) is arranged on the telescopic device (30).
2. The caving-coal-based simulation test system of claim 1,
a baffle (40) is also arranged on one side edge of the platform (20); wherein one end of the baffle (40) is movably connected with the base (10), and the other end of the baffle protrudes out of the upper end surface of the platform (20);
a plurality of limiting clamping grooves (42) corresponding to the motion trail of the platform (20) are arranged on a baffle plate (40) outside the inserting groove (11);
wherein, a limit block matched with the limit clamping groove (42) is suitable to be configured on the platform (20);
the limiting clamping grooves (42) are arranged at equal intervals in a radian mode.
3. The caving-coal-based simulation test system of claim 2,
an inserting groove (11) is configured on the base (10), and the baffle (40) is suitable for being inserted into the inserting groove (11);
when a plurality of telescopic devices (30) do telescopic motion simultaneously, the baffle plate (40) can do telescopic motion relative to the insertion groove (11);
when the plurality of telescopic devices (30) independently do telescopic motion, the baffle plate (40) can do rotary motion relative to the insertion groove (11).
4. The caving-coal-based simulation test system of claim 1,
the push assembly (60) comprises:
a cover plate (62) arranged along a longitudinal direction of the platform (20) and slidably coupled with the platform (20);
a drive member adapted to be coupled with the cover plate (62) for driving the cover plate (62) to reciprocate in the longitudinal direction.
5. The caving-coal-based simulation test system of claim 4,
-arranging a tie rod (63) along the longitudinal direction of the platform (20), the cover plate (62) and the tie rod (63) being coupled relatively slidably therebetween;
wherein one end of the driving member is coupled with the cover plate (62), and the other end thereof is coupled with the platform (20).
6. The caving-coal-based simulation test system of claim 1,
the pushing assembly (60) comprises a plurality of pushing assemblies (60), and the plurality of pushing assemblies (60) are arranged on the platform (20) at intervals along the transverse direction.
7. The caving-coal-based simulation test system of claim 1,
the support assembly (70) further comprises:
one end of the coal baffle plate (71) is hinged with the protective frame (72);
one end of the supporting rod (73) is hinged with the other end of the coal baffle plate (71), and the other end of the supporting rod is hinged with the protective frame (72).
8. The caving-coal-based simulation test system of claim 7,
the support rod (73) includes: a first sleeve (731), a second sleeve (732) and a telescopic rod (733),
the first sleeve (731) is hinged with a coal baffle plate (71) or the protection frame (72), and the second sleeve (732) is hinged with the protection frame (72) or the coal baffle plate (71);
the telescopic rod (733) is adjustably coupled between the first bushing (731) and the second bushing (732) to lengthen or shorten the length of the support bar (73).
9. The caving-coal-based simulation test system of claim 8,
the telescopic rod (733) includes: a first screw (7331), a second screw (7332), and a knob (7333),
the knob (7333) is fixedly coupled with the first screw (7331) and the second screw (7332);
the first sleeve (731) is provided with a first threaded hole, and the first screw rod (7331) is matched with the first threaded hole;
the second sleeve (732) is provided with a second threaded hole, and the second screw rod (7332) is matched with the second threaded hole;
wherein the first threaded hole and the second threaded hole have opposite rotation directions, and the first screw (7331) and the second screw (7332) have opposite rotation directions.
10. A simulation test method based on top coal caving is characterized by comprising the following steps:
s10: calculating and determining the parameter proportion and the size of the simulated rock stratum according to a single variable required to be controlled in an experiment and specific experiment conditions and field conditions; through measurement and experiments of a field coal gangue sample, selecting a proper discrete material as an experimental material according to experimental requirements to simulate broken top coal and gangue;
s20: designing mining conditions of a coal seam structure, a gangue type and a gangue content according to an experimental scheme, and paving discrete materials in a storage box (50) according to the thickness and the sequence set by the experimental scheme to simulate a broken coal seam and a direct roof, wherein three grades with different particle sizes are selected for top coal gangue;
s30: the simulation of the coal caving process of different coal caving modes of single-wheel sequential coal caving, multi-wheel sequential coal caving, single-wheel interval coal caving and multi-wheel interval coal caving is realized by controlling at least one pushing assembly (60);
s40: the platform (20) is adjusted to perform inclined motion by controlling a single telescopic device (30), so that the coal caving process of the inclined coal seam is simulated;
s50: in the coal caving process, the weighing sensor (61) is started in real time, the weight of the storage box (50) is weighed in real time along with the coal caving process, the obtained data is displayed and stored in real time through the quality display instrument, and the quality change rule of a coal and gangue boundary in the coal caving process is observed and analyzed; meanwhile, the infrared high-speed camera (76) arranged on the coal blocking plate (71) is used for recording coal and gangue image information, the vibration sensor (74) is used for recording vibration response generated when coal and gangue collide with the coal blocking plate (71), and the sound sensor (75) is used for collecting sound wave signals generated when coal and gangue collide with the coal blocking plate (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111212281.3A CN114033494A (en) | 2021-10-18 | 2021-10-18 | Simulation test system and test method based on top coal caving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111212281.3A CN114033494A (en) | 2021-10-18 | 2021-10-18 | Simulation test system and test method based on top coal caving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114033494A true CN114033494A (en) | 2022-02-11 |
Family
ID=80135321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111212281.3A Pending CN114033494A (en) | 2021-10-18 | 2021-10-18 | Simulation test system and test method based on top coal caving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114033494A (en) |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2091783A (en) * | 1981-01-27 | 1982-08-04 | Coal Industry Patents Ltd | Mineral mining installation |
| CN104504988A (en) * | 2014-12-30 | 2015-04-08 | 中国矿业大学(北京) | Four-dimensional transparent visual experiment table and method for simulating top coal drawing |
| CN204630746U (en) * | 2014-11-24 | 2015-09-09 | 中国矿业大学(北京) | A kind of top coals' recovery ratio and ore deposit are pressed and are manifested relationship experiments platform |
| CN105781617A (en) * | 2016-05-16 | 2016-07-20 | 西安科技大学 | Three-dimensional experiment table for determining optimized parameters of top coal caving mining for extra-thick coal bed |
| CN106128268A (en) * | 2016-08-24 | 2016-11-16 | 鞍钢集团矿业有限公司 | The analog of a kind of actual ore body excavation and method |
| CN106885744A (en) * | 2017-03-06 | 2017-06-23 | 山东科技大学 | A kind of experimental provision and method for coal gangue particle impact |
| WO2017185724A1 (en) * | 2016-04-29 | 2017-11-02 | 中国矿业大学 | Design method for transition support timbering parameter of filling and fully-mechanized coal mining and mixed mining face |
| CN108389493A (en) * | 2018-03-14 | 2018-08-10 | 山东科技大学 | A kind of Sub-Level Caving imitates coal stream bastard coal let-down impact test system and its application |
| CN109026001A (en) * | 2018-09-25 | 2018-12-18 | 中国矿业大学 | A kind of drawing coal technology and parameter regulation means and device improving top coals' recovery ratio |
| CN109372513A (en) * | 2018-12-07 | 2019-02-22 | 山东科技大学 | A kind of top coals' recovery ratio and bastard coal stream percentage of shale content statistic device and method |
| CN208790649U (en) * | 2018-08-03 | 2019-04-26 | 崔立军 | A kind of two-stage material conveyer |
| CN110044757A (en) * | 2019-04-24 | 2019-07-23 | 河南理工大学 | Coal simulator and experimental method are put in a kind of collaboration of fully mechanized coal face three-dimensional group |
| RU2703079C1 (en) * | 2019-02-08 | 2019-10-15 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Method for development of a thick gently sloping bed with release of coal of ceiling |
| CN209838481U (en) * | 2019-05-16 | 2019-12-24 | 崔玉洪 | Mine inspection robot |
| CN210182014U (en) * | 2019-07-17 | 2020-03-24 | 祝欢 | Outdoor retractable advertising device |
| CN111337643A (en) * | 2020-03-09 | 2020-06-26 | 大连大学 | Coal seam mining device applied to mining two-dimensional similar experiment table |
| US20200292419A1 (en) * | 2019-03-11 | 2020-09-17 | China University Of Mining And Technology, Beijing | Experimental platform and experimental method for simulating coal rock disaster of coal mine stope |
| CN111729786A (en) * | 2020-07-02 | 2020-10-02 | 振源昌机械(惠州)有限公司 | Paint spraying apparatus is used in hardware production and processing |
| AU2019229395A1 (en) * | 2019-03-18 | 2020-10-08 | China University Of Mining And Technology, Beijing | Large-Size Intelligent Coal Drawing Experimental Platform and Test Method |
| CN111789388A (en) * | 2020-07-21 | 2020-10-20 | 黄海龙 | Rotatable dress designing workbench with drawing lines and cutting and using method |
| CN111980739A (en) * | 2020-08-06 | 2020-11-24 | 中煤能源研究院有限责任公司 | Intelligent coal caving control device and method for thick coal seam fully mechanized caving mining support |
| WO2021129434A1 (en) * | 2019-12-27 | 2021-07-01 | 太仓市明龙机械有限公司 | Safety protection device for coal mining |
-
2021
- 2021-10-18 CN CN202111212281.3A patent/CN114033494A/en active Pending
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2091783A (en) * | 1981-01-27 | 1982-08-04 | Coal Industry Patents Ltd | Mineral mining installation |
| CN204630746U (en) * | 2014-11-24 | 2015-09-09 | 中国矿业大学(北京) | A kind of top coals' recovery ratio and ore deposit are pressed and are manifested relationship experiments platform |
| CN104504988A (en) * | 2014-12-30 | 2015-04-08 | 中国矿业大学(北京) | Four-dimensional transparent visual experiment table and method for simulating top coal drawing |
| WO2017185724A1 (en) * | 2016-04-29 | 2017-11-02 | 中国矿业大学 | Design method for transition support timbering parameter of filling and fully-mechanized coal mining and mixed mining face |
| CN105781617A (en) * | 2016-05-16 | 2016-07-20 | 西安科技大学 | Three-dimensional experiment table for determining optimized parameters of top coal caving mining for extra-thick coal bed |
| CN106128268A (en) * | 2016-08-24 | 2016-11-16 | 鞍钢集团矿业有限公司 | The analog of a kind of actual ore body excavation and method |
| CN106885744A (en) * | 2017-03-06 | 2017-06-23 | 山东科技大学 | A kind of experimental provision and method for coal gangue particle impact |
| CN108389493A (en) * | 2018-03-14 | 2018-08-10 | 山东科技大学 | A kind of Sub-Level Caving imitates coal stream bastard coal let-down impact test system and its application |
| CN208790649U (en) * | 2018-08-03 | 2019-04-26 | 崔立军 | A kind of two-stage material conveyer |
| CN109026001A (en) * | 2018-09-25 | 2018-12-18 | 中国矿业大学 | A kind of drawing coal technology and parameter regulation means and device improving top coals' recovery ratio |
| CN109372513A (en) * | 2018-12-07 | 2019-02-22 | 山东科技大学 | A kind of top coals' recovery ratio and bastard coal stream percentage of shale content statistic device and method |
| RU2703079C1 (en) * | 2019-02-08 | 2019-10-15 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Method for development of a thick gently sloping bed with release of coal of ceiling |
| US20200292419A1 (en) * | 2019-03-11 | 2020-09-17 | China University Of Mining And Technology, Beijing | Experimental platform and experimental method for simulating coal rock disaster of coal mine stope |
| AU2019229395A1 (en) * | 2019-03-18 | 2020-10-08 | China University Of Mining And Technology, Beijing | Large-Size Intelligent Coal Drawing Experimental Platform and Test Method |
| CN110044757A (en) * | 2019-04-24 | 2019-07-23 | 河南理工大学 | Coal simulator and experimental method are put in a kind of collaboration of fully mechanized coal face three-dimensional group |
| CN209838481U (en) * | 2019-05-16 | 2019-12-24 | 崔玉洪 | Mine inspection robot |
| CN210182014U (en) * | 2019-07-17 | 2020-03-24 | 祝欢 | Outdoor retractable advertising device |
| WO2021129434A1 (en) * | 2019-12-27 | 2021-07-01 | 太仓市明龙机械有限公司 | Safety protection device for coal mining |
| CN111337643A (en) * | 2020-03-09 | 2020-06-26 | 大连大学 | Coal seam mining device applied to mining two-dimensional similar experiment table |
| CN111729786A (en) * | 2020-07-02 | 2020-10-02 | 振源昌机械(惠州)有限公司 | Paint spraying apparatus is used in hardware production and processing |
| CN111789388A (en) * | 2020-07-21 | 2020-10-20 | 黄海龙 | Rotatable dress designing workbench with drawing lines and cutting and using method |
| CN111980739A (en) * | 2020-08-06 | 2020-11-24 | 中煤能源研究院有限责任公司 | Intelligent coal caving control device and method for thick coal seam fully mechanized caving mining support |
Non-Patent Citations (5)
| Title |
|---|
| ZHIJUN WAN 等: "A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings", SHOCK AND VIBRATION, vol. 1, pages 36 - 17 * |
| 仝矿伟等: "大倾角综放面支架三维力学分析及其稳定性控制", 煤矿机械, vol. 37, no. 6, pages 62 - 65 * |
| 孙利辉等: "大倾角厚煤层综放工作面放煤工艺及顶煤运动特征试验", 采矿与安全工程学报, vol. 33, no. 2, pages 208 - 213 * |
| 张学亮等: "厚煤层智能放煤工艺及精准控制关键技术研究", 煤炭工程, vol. 52, no. 9, pages 1 - 6 * |
| 张朝阳: "新世纪煤矿采煤工艺的选择探讨", 河南科技, no. 15, pages 20 - 20 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2019439936B2 (en) | TBM-mounted advanced geological prediction system and method based on identification of lithology and adverse geology precursor characteristics | |
| CN204632098U (en) | A kind of fully-automatic intelligent test macro | |
| CN110823737B (en) | Surrounding rock mechanical parameter automatic test system and method suitable for TBM | |
| CN205259939U (en) | Six arms top anchor rod drilling carriage | |
| CN105973773B (en) | The experimental provision and experimental method measured for coal mine fully mechanized coal face dust rule | |
| CN104614191B (en) | Experiment table of relationship between top coal's recovery ratio and strata behavior, application method thereof | |
| CN206652726U (en) | Fish automatic measuring and sorting unit | |
| CN111691908B (en) | Automatic coal caving control system for fully mechanized caving face | |
| CN107748204B (en) | Single-particle coal gangue impact vibration test device and application thereof | |
| CN110672358A (en) | Soil and fertilizer nutrient quick-measuring and sampling device and sampling processing method thereof | |
| CN103380259A (en) | In situ sampling and analysis system for a drill rig and a drill rig incorporating same | |
| CN114813759A (en) | Hole checking device and method for precisely detecting number of holes in printed circuit board | |
| CN107367399A (en) | Automatic coal sampling device | |
| CN114033494A (en) | Simulation test system and test method based on top coal caving | |
| CN108444667B (en) | A kind of Sub-Level Caving bastard coal impact vibration experimental rig and its application | |
| CN110303496A (en) | A kind of crucible of filler instrument automatically grabs control system and control method | |
| CN108593880A (en) | Automatic test device and method for the test of mining surface movement | |
| CN110904941B (en) | Sampling structure for road bed detection and sampling method thereof | |
| CN116331861A (en) | Coal discharging mechanism running state monitoring test bed and application thereof | |
| CN107414472A (en) | The automatic lock screw machine that a kind of three face locks | |
| CN204594982U (en) | A kind of rock stratum and subsidence simulation box type testing apparatus | |
| CN206930479U (en) | Coal sampling device | |
| CN207423892U (en) | Individual particle bastard coal impact vibration experimental rig | |
| CN109030065A (en) | A kind of Soil K+adsorption equipment for being detected to deep soil | |
| CN117334119A (en) | Fully-mechanized caving coal mining rock intelligent identification and coal caving rule research test bed and test method |
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 |