CN109026001B - Coal caving process for improving top coal caving rate and parameter adjusting method and device - Google Patents
Coal caving process for improving top coal caving rate and parameter adjusting method and device Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 197
- 238000000034 method Methods 0.000 title claims abstract description 83
- 238000005422 blasting Methods 0.000 claims abstract description 43
- 239000011435 rock Substances 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000005303 weighing Methods 0.000 claims description 34
- 238000007599 discharging Methods 0.000 claims description 17
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 13
- 238000012706 support-vector machine Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 8
- 239000002360 explosive Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012549 training Methods 0.000 description 4
- 235000005770 birds nest Nutrition 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 235000005765 wild carrot Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000013468 resource allocation Methods 0.000 description 2
- 241000544061 Cuculus canorus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
The invention discloses a coal caving process for improving top coal caving rate, a parameter adjusting method and a device, wherein the coal caving process comprises the following steps: s1, primary step length L of second rock beam structure 0 The method comprises the steps of carrying out a first treatment on the surface of the S2, cutting 1/2L of the cutting hole from the working surface in the crossheading 0 、2/3L 0 And L 0 Is arranged to a top beam blast borehole through the second rock beam towards the coal wall in front of the working face; s3, arranging circular blasting holes at two cis-slot positions according to the periodical collapse step distance; s4, carrying out stoping after the top beam blasting drilling and the circulating blasting drilling are blasted in sequence; the method and the device for adjusting the coal caving technological parameters monitor the caving condition of the top coal by arranging a plurality of sensors, calculate the partial caving rate of the top coal, and then adjust the coal caving technological parameters in real time, thereby improving the overall caving rate of the top coal. Aiming at the coal mine with hard roof and hard gangue or high toughness of coal bodies in the coal seam, the invention improves the mine pressure, fully breaks the roof coal, really solves the problem of low coal discharge rate, and ensures the safe and efficient mining of the coal mine.
Description
Technical Field
The invention relates to a coal caving process, in particular to a coal caving process for improving top coal caving rate and a parameter adjusting method and device, and belongs to the technical field of coal mining.
Background
Certain areas become main energy bases in China, the coal seam thickness is generally large, and the top coal caving technology is generally adopted to improve the production efficiency. However, when the roof is hard and the toughness of the coal seam contains hard gangue or coal bodies is high, the roof coal is difficult to discharge, so that the coal extraction rate is low, and some coal mines even have coal extraction rates less than 50%, and resources are seriously wasted. Moreover, the overhead coal left in the goaf can cause hidden dangers such as gas emission increase, goaf spontaneous combustion and the like, which is not beneficial to safe and efficient mining of the working face.
The root cause of the problems is that the mine pressure is smaller, the roof coal with larger hardness, non-development cracks and harder gangue layers is not crushed sufficiently, the roof coal is larger in lump size and difficult to discharge, meanwhile, the roof coal is smaller in caving angle, and part of the upper roof coal directly falls into a goaf and is difficult to recycle. In the prior art, a blasting mode is generally adopted to presplit the top coal, then mine pressure is utilized to crush the top coal, and the mode obtains a better coal discharging effect under the condition of low toughness of coal bodies, but the dosage of the method is larger, so that the production of the coal mine is often delayed due to explosive shortage.
Disclosure of Invention
The invention aims to provide a coal caving process for improving the caving rate of top coal, a parameter adjusting method and a device, aiming at a coal mine with a hard top plate, hard gangue contained in a coal bed or high toughness of a coal body, the mine pressure is improved, the top coal is fully crushed, the problem of low caving rate is practically solved, and the safe and efficient mining of the coal mine is ensured.
In order to achieve the above purpose, the coal discharging process for improving the top coal discharging rate adopted by the invention comprises the following steps:
s1, obtaining a primary period step-pressing distance L of a second rock beam structure of the roof through calculation 0 ；
S2, cutting 1/2L of the cutting hole from the working surface in the crossheading 0 、2/3L 0 And L 0 Is arranged to a top beam blast borehole through the second rock beam towards the coal wall in front of the working face;
s3, arranging circulating blasting drilling holes at two cis-slot positions according to the periodical collapse step distance, wherein the circulating blasting drilling holes penetrate through the second rock beam; wherein the control distance of the longest borehole is at least greater than 1/3 of the length of the working surface on a horizontal plane projection; the cyclic blasting boreholes were arranged according to the parameters in table 1:
table 1 circulation blasting drilling parameter table
S4, carrying out stoping after the top beam blasting drilling and the circulating blasting drilling are blasted in sequence; the stoping work comprises the following steps: a. when the coal cutter runs from the end of the working face adjacent to the material gate to the end adjacent to the transportation gate, coal cutting operation is carried out, and coal is not cut when the coal cutter returns; b. when the coal is cut, the coal is not put, and after the coal is cut, the coal is put; in the process, the single coal discharge is not less than 1 minute, and two or more brackets are used for cooperatively discharging the coal.
Further, in step S2, the top beam blasting holes include at least four holes having angles of 30 °, 40 °, 50 ° and 60 ° respectively with respect to the horizontal direction.
A parameter adjustment method for a coal caving process for improving top coal caving rate comprises the following steps:
a1, monitoring the distribution condition of the top coal block above a working surface through an infrared sensing device;
a2, a plurality of electronic weighing devices are arranged on the rear scraper conveyor and are used for measuring the weight of the coal and calculating the top coal discharge rate in real time;
a3, a bracket stress sensor measures the stress born by the bracket in the working surface;
a4, the bracket pose dynamic monitor is used for monitoring the position state of the bracket;
and A5, according to a support vector machine algorithm, integrating the top coal discharge rate, the position of the bracket and the stress on the bracket to find the position with low coal discharge rate in time, thereby informing a coal discharging worker to adjust the coal discharging process parameters.
A parameter adjusting device for a coal caving process for improving top coal caving rate, comprising: the device comprises a plurality of infrared sensing devices for monitoring the distribution of the top coal block, a plurality of electronic weighing devices for weighing the weight of coal on a rear scraper conveyor, a bracket pose dynamic monitor for monitoring the position and the pose of a bracket, a bracket pressure sensor for monitoring the pressure born by the bracket and a process parameter adjuster; the process parameter adjuster comprises a memory, an LS-SVM server and a display;
the infrared sensing device is arranged above the rear scraper conveyor on the working surface, and the support pose dynamic monitor and the support pressure sensor are arranged on the rest hydraulic supports except the end hydraulic support;
the infrared sensing device monitors the block distribution condition in the top coal and inputs the result to the process parameter regulator; the electronic weighing device measures the weight of the coal discharged in unit time and inputs the result to the process parameter regulator; the bracket pose dynamic monitor monitors the position and the pose of each hydraulic bracket and inputs the result to the process parameter regulator; the bracket pressure sensor monitors the pressure born by each hydraulic bracket and inputs the result to the process parameter regulator; the process parameter adjuster receives various data and stores the data into the memory, the LS-SVM server processes the data and searches for the process parameter with the maximum top coal discharge rate, and then the process parameter is reflected to the display.
Further, the electronic weighing devices are arranged below the rear scraper conveyor and are uniformly arranged along the direction of the rear scraper conveyor.
Further, the number of the infrared sensing devices is equal to that of the electronic weighing devices, and the infrared sensing devices and the electronic weighing devices are in one-to-one correspondence; each infrared sensing device is arranged on the hydraulic support adjacent to the corresponding electronic weighing device.
Further, the electronic weighing device is an electronic scale.
The invention solves the difficult problems of low top coal discharge rate of a hard top plate and hard gangue or coal under the condition of higher toughness, and compared with the prior art:
aiming at top coal blasting, compared with full blasting, the explosive consumption is greatly reduced, and the consumption is less than 1/20 of that of full blasting;
the invention effectively relieves the unstable factors brought to the safe production of the working face by the gas emission quantity and natural ignition;
the invention obviously reduces the labor engineering quantity and simultaneously reduces the tension on the adjustment of staff on the working face of the link; resource allocation on the working face is optimized, so that the top coal discharge rate is improved, and the mining and discharging cost is reduced;
the invention has relatively simple operation flow and improves the reliability of the whole system.
Drawings
FIG. 1 is a schematic diagram of a coal caving process for increasing the top coal caving rate of the present invention;
FIG. 2 is a schematic view in the direction A-A of FIG. 1;
FIG. 3 is a schematic view in the direction B-B in FIG. 1;
FIG. 4 is a schematic diagram of a parameter adjustment device for a coal caving process for increasing the top coal caving rate according to the present invention;
FIG. 5 is a schematic diagram of the operation of a process parameter adjuster in a parameter adjusting device for a coal caving process for improving the top coal caving rate of the invention;
FIG. 6 is a flowchart of a specific operation of the LS-SVM server;
in the figure:
1. a working surface;
2. a coal body 21, a first rock beam 22, a second rock beam;
31. transport gate, 32. Track gate;
4. the method comprises the following steps of (1) top beam blasting drilling, (41) first top beam blasting drilling, (42) second top beam blasting drilling, (43) third top beam blasting drilling, and (44) fourth top beam blasting drilling;
5. circularly blasting and drilling holes;
61. the system comprises an infrared sensing device 62, a process parameter adjuster 63, a weighing device 64, a bracket pressure sensor 65 and a bracket pose dynamic monitor;
71. and (2) a hydraulic support and a rear scraper conveyor.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
For the coal mine with a hard top plate and high toughness containing hard gangue or coal body 2, when the working face 1 advances forwards, the rock stratum above the top plate is difficult to break, so that the top coal discharge rate is influenced; while the effect of the thick and hard rock stratum on the discharging efficiency of the top coal crusher is particularly great, for convenience of description, as shown in fig. 2 or 3, the thick and hard first rock stratum above the top plate is formed into a first rock girder 21, the second rock stratum is formed into a second rock girder 22, and so on; through experimental study, the second rock beam 22 can be broken periodically, and the influence on the periodical pressure of the working face 1 and the release of top coal is large.
As shown in fig. 1 to 3, a coal caving process for improving a top coal caving rate comprises the following steps:
s1, calculating the primary period of the roof second rock beam 22 structure to obtain the step length L 0 ；
S2, cutting 1/2L of the holes from the working surface 1 in the transportation gate 31 and the track gate 32 respectively 0 、2/3L 0 And L 0 Is arranged to the coal wall in front of the working face 1 to top beam blastholes 4 penetrating through the second rock beam 22, as shown in fig. 1 and 2, each group of top beam blastholes 4 at least comprises a first top beam blasthole 41, a second top beam blasthole 42, a third top beam blasthole 43, a fourth top beam blasthole 44, and a fourth top beam blasthole 43, and a fourth top beam blasthole 44, respectively, with an included angle of 30 degrees, 40 degrees, 50 degrees, and 60 degrees with the horizontal direction; each group of top beam blasting holes 4 is kept on the same plane, and the number of the top beam blasting holes can be increased according to the specific situation;
s3, arranging circulating blasting drill holes 5 at two cis-slot positions according to the periodical collapse step distance, wherein the circulating blasting drill holes 5 penetrate through the second rock beams 22; wherein the control distance of the longest drilling hole is at least greater than 1/3 of the length of the working surface 1 on the horizontal plane projection; therefore, the coal body 2 in front of the working surface 1 can be penetrated by the blasting impact waves, namely, after the blasting holes on the track cis-slots 32 and the transportation cis-slots 31 are blasted, the generated cracks can penetrate the coal body 2 between the two cis-slots; each set of cyclic blasting holes 5 comprises a 1#, 2#, 3#, 4#, 5#, 6# hole drilled from the transportation chute 31 into the coal body 2 in front of the working surface 1, and a 7#, 8#, 9#, 10#, 11# hole drilled from the rail chute 32 into the coal body 2 in front of the working surface 1. The cyclic blasting boreholes 5 are arranged according to the parameters in table 1:
table 1 circulation blasting drilling parameter table
S4, carrying out stoping after the top beam blasting drilling 4 and the circulating blasting drilling 5 are blasted in sequence; the stoping work comprises the following steps: a. when the coal cutter runs from the end of the working face 1 adjacent to the material cis-slot to the end adjacent to the transportation cis-slot 31, coal cutting operation is carried out, and coal is not cut when the coal cutter returns; b. when the coal is cut, the coal is not put, and after the coal is cut, the coal is put; in the process, the single coal discharge is not less than 1 minute, and two or more brackets are used for cooperatively discharging the coal.
By the method, the second rock beam 22 can be effectively broken and cracked, rock strata and top coal at the lower part of the second rock beam 22 are cracked, after the second rock beam 22 is broken, the gravity of the overlying rock stratum is transferred to the rock beams and the top coal at the lower part of the second rock beam, the top coal is subjected to pressure increase, and the breaking degree is increased, so that the energy generated by blasting can be fully utilized, and compared with the comprehensive blasting, the explosive consumption is greatly reduced, and is less than 1/20 of the total blasting medicament consumption.
In order to improve the top coal discharge rate again, the matching of the coal discharge process is also needed, so in the coal discharge process in the step S4, the parameters of the coal discharge process are dynamically adjusted, and the top coal discharge rate is improved to the maximum extent.
A1, through an infrared induction device 61, monitoring the distribution condition of the top coal block above the working surface 1; the infrared sensing device 61 analyzes the distribution of the top coal block degree through imaging;
a2, a plurality of electronic weighing devices 63 are arranged on the rear scraper conveyor 72 and are used for measuring the weight of the coal and calculating the top coal discharge rate in real time; the parameters such as the thickness, the volume weight and the like of the top coal are known, and the number and the top area of the hydraulic supports 71 in the adjacent area of the single electronic weighing device 63 are known, so that the total weight of the top coal above can be obtained; the top coal above the hydraulic support 71 in the area can be discharged through the hydraulic support 71 corresponding to the electronic weighing device 63, and the mass of the discharged coal is weighed by the electronic weighing device 63; thereby obtaining the top coal discharge rate in the area;
a3, a bracket stress sensor measures the stress born by the bracket in the working surface 1;
a4, a bracket pose dynamic monitor 65 is used for monitoring the position state of the bracket;
and A5, according to a support vector machine algorithm, integrating the top coal discharge rate, the position of the bracket and the stress on the bracket to find the position with low coal discharge rate in time, thereby informing a coal discharging worker to adjust the coal discharging process parameters.
A parameter adjusting device for a coal discharging process for improving top coal discharging rate, as shown in fig. 4, which is arranged in a working surface 1, comprises: the device comprises a plurality of infrared sensing devices 61 for monitoring the distribution of the top coal block, a plurality of electronic weighing devices 63 for weighing the weight of coal on a rear scraper conveyor 72, a bracket pose dynamic monitor 65 for monitoring the position and the pose of a bracket, a bracket pressure sensor 64 for monitoring the pressure born by the bracket and a process parameter adjuster 62; the process parameter adjuster 62 includes a memory, an LS-SVM server, and a display;
the infrared sensing device 61 is arranged above the rear scraper conveyor 72 on the working surface 1, and a bracket pose dynamic monitor 65 and a bracket pressure sensor 64 are arranged on the rest of the hydraulic brackets 71 except the end hydraulic brackets 71;
the infrared sensing device 61 monitors the block distribution condition in the top coal and inputs the result to the process parameter adjuster 62;
the electronic weighing device 63 measures the weight of the coal discharged in unit time and inputs the result to the process parameter regulator 62; the process parameter adjuster 62 may also be used to measure the weight of the coal and calculate the top coal discharge rate in real time; the parameters such as the thickness, the volume weight and the like of the top coal are known, and the number and the top area of the hydraulic supports 71 in the adjacent area of the single electronic weighing device 63 are known, so that the total weight of the top coal above can be obtained; the top coal above the hydraulic support 71 in the area can be discharged through the hydraulic support 71 corresponding to the electronic weighing device 63, and the mass of the discharged coal is weighed by the electronic scale; thereby obtaining the top coal discharge rate in the area;
the bracket pose dynamic monitor 65 monitors the position and pose of each hydraulic bracket 71 and inputs the result to the process parameter adjuster 62; i.e., whether each of the racks is in a coal-discharging state and its position information is reflected to the process parameter adjuster 62;
the bracket pressure sensor 64 monitors the pressure experienced by each hydraulic bracket 71 and inputs the results to the process parameter regulator 62;
as shown in fig. 5, the process parameter adjuster 62 receives various data and stores the data in the memory, the LS-SVM server performs data processing and finds the process parameter with the maximum top coal discharge rate, and then reflects the process parameter to the display, and the processed intermediate data can be stored in the memory, so that the worker adjusts various process parameters according to the result.
As shown in FIG. 6, the LS-SVM server specifically operates by first embedding history data into the process parameter adjuster 62, performing training learning on the support vector machine after data preprocessing, and providing optimal process parameters by the support vector machine through the training learning of the history data; after the real-time data in the sensing device enter the memory, the data are processed and analyzed by the support vector machine after being preprocessed, and finally an optimal technological parameter is obtained, so that workers can adjust the coal mining work in real time according to the provided technological parameter; the data is finally returned to training learning data of the support vector machine, the reliability of the data is further improved, and when the provided process parameters have errors, the manual intervention is carried out for correction.
The LS-SVM server module in the process parameter adjuster 62 specifically operates as follows:
the acquisition frequency is set to be 10Hz, namely 10 samples per second, each sample comprises four parameters of a block degree, a discharge rate, a bracket pressure and a bracket position, the data acquisition time is 1h, all samples (including parameters) acquired in one hour are input into an LS-SVM server module, and the core principle of the LS-SVM server module is a support vector machine model of the top coal caving process parameters. And (3) accurately classifying all samples, and establishing a support vector machine model of the caving coal process parameters. The classification is required to correctly classify all samples, and meets the following requirements
y i [(ω·x i )]≥1,i＝1,2,3,4
Wherein: (x) i ,y i ) For the samples, l is the total number of training samples, ω is the parameter vector.
The optimal classification hyperplane problem can be converted into the following optimization problem with constraint conditions to be solved
Wherein: b is an arithmetic constant.
According to the optimal yield result, the conversion form is obtained by utilizing the Lagrangian function:
wherein: c (C)>0) For controlling the degree of punishment, alpha, on misclassified samples i α j Is the transformed parameter.
And (3) carrying out self-adaptive adjustment strategy on the complex coal seam mining technological parameters by combining with a cuckoo algorithm:
step＝step min +(step max -step min )d i
wherein: step max 、step min Representing the maximum and minimum steps; n is n best Representing the optimal state of the current bird nest position; n is n i Representing the ith bird nest location; d, d max Representing the maximum distance between the optimal position and the other bird nest.
The process parameter adjuster 62 outputs parameters of optimized sample parameters including block distribution, discharge rate, bracket pressure and bracket position, compares the difference between original parameters and target parameters, and outputs corresponding optimal coal discharge process parameters, namely, which bracket should discharge coal and how long the coal should be discharged, so that the top coal discharge rate at the position is maximum, and when the hydraulic bracket 71 is moved to which position or the bracket is discharged coal and keeps what gesture according to the block distribution of the top coal, the top coal discharge rate is maximum; the results are then displayed on a display.
As shown in fig. 4, as a further alternative, the electronic weighing device 63 is disposed below the rear scraper conveyor 72 so as not to interfere with the normal operation of the rear scraper conveyor 72; the electronic weighing devices 63 are uniformly arranged along the direction of the rear scraper conveyor 72, so that the condition of the whole working surface 1 can be accurately measured.
As shown in fig. 4, further, the number of the infrared sensing devices 61 is equal to that of the electronic weighing devices 63, and the infrared sensing devices and the electronic weighing devices are in one-to-one correspondence; each of the infrared sensing devices 61 is disposed on the hydraulic mount 71 adjacent to the electronic weighing device 63 corresponding thereto. The infrared sensing device 61 monitors the distribution condition of the top coal in the monitored area, the electronic weighing device 63 can calculate the top coal discharge rate in the area, and the two can monitor the same area, so that the data is reliable.
Further, the electronic weighing device 63 is an electronic scale.
The invention solves the difficult problems of low top coal discharge rate under the conditions of high toughness of hard top plate, hard gangue and coal body, and compared with the prior art: aiming at top coal blasting, compared with full blasting, the explosive consumption is greatly reduced, and the consumption is less than 1/20 of that of full blasting; the invention effectively relieves the unstable factors brought to the safe production of the working face by the gas emission quantity and natural ignition; the invention obviously reduces the labor engineering quantity and simultaneously reduces the tension on the adjustment of staff on the working face of the link; resource allocation on the working face is optimized, so that the top coal discharge rate is improved, and the mining and discharging cost is reduced; the invention has relatively simple operation flow and improves the reliability of the whole system.
Claims (7)
1. The coal caving process for improving the top coal caving rate is characterized by comprising the following steps of:
s1, obtaining the primary step length L of the roof second rock beam (22) structure through calculation 0 ；
S2, cutting 1/2L from the working surface (1) in the cis-flute 0 、2/3 L 0、 And L 0 Is arranged to a top beam blasting borehole (4) passing through the top plate second rock beam towards the coal wall in front of the working surface (1);
s3, arranging circulating blasting drill holes (5) at two cis-slot positions according to the periodical collapse step distance, wherein the circulating blasting drill holes (5) penetrate through the second rock beam of the top plate; wherein the control distance of the longest drilling hole is at least greater than 1/3 of the length of the working surface (1) on the horizontal plane projection;
s4, carrying out stoping after the top beam blasting drilling hole (4) and the circulating blasting drilling hole (5) are blasted in sequence; the stoping work comprises the following steps: a. when the coal cutter runs from the end of the working face (1) adjacent to the material cis-slot to the end adjacent to the transportation cis-slot (31), coal cutting operation is carried out, and coal is not cut when the coal cutter returns; b. when the coal is cut, the coal is not put, and after the coal is cut, the coal is put.
2. The coal caving process for increasing the caving rate of top coal according to claim 1, wherein in step S2, the top beam blasting holes (4) comprise at least four holes having angles of 30 °, 40 °, 50 ° and 60 ° respectively with respect to the horizontal direction.
3. The parameter adjustment method of the coal caving process for improving the top coal caving rate is characterized by comprising the following steps of:
a1, monitoring the distribution condition of the top coal block degree above the working surface (1) through an infrared sensing device (61);
a2, a plurality of electronic weighing devices (63) are arranged on the rear scraper conveyor (72) and are used for measuring the weight of the coal and calculating the top coal discharge rate in real time;
a3, a bracket stress sensor measures the stress born by the bracket in the working surface (1);
a4, a bracket pose dynamic monitor (65) is used for monitoring the position state of the bracket;
and A5, according to a support vector machine algorithm, integrating the top coal discharge rate, the position of the bracket and the stress on the bracket to find the position with low coal discharge rate in time, thereby informing a coal discharging worker to adjust the coal discharging process parameters.
4. The utility model provides a parameter adjustment device of coal technology of putting of improvement top coal rate of putting, its characterized in that includes: the device comprises a plurality of infrared sensing devices (61) for monitoring the distribution of the top coal block, a plurality of electronic weighing devices (63) for weighing the weight of coal on a rear scraper conveyor (72), a bracket pose dynamic monitor (65) for monitoring the position and the pose of a bracket, a bracket pressure sensor (64) for monitoring the pressure born by the bracket and a process parameter adjuster (62); the process parameter adjuster (62) comprises a memory, an LS-SVM server and a display;
the infrared sensing device (61) is arranged above a rear scraper conveyor (72) on the working surface (1), and the rest hydraulic supports (71) except the end hydraulic support (71) are provided with the support pose dynamic monitor (65) and the support pressure sensor (64);
the infrared sensing device (61) monitors the block distribution condition in the top coal and inputs the result to the process parameter adjuster (62); the electronic weighing device (63) measures the weight of the coal discharged in unit time and inputs the result to the process parameter regulator (62); the bracket pose dynamic monitor (65) monitors the position and the pose of each hydraulic bracket (71) and inputs the result to the process parameter adjuster (62); the bracket pressure sensor (64) monitors the pressure experienced by each hydraulic bracket (71) and inputs the results to the process parameter regulator (62); the process parameter adjuster (62) receives the data and stores the data in the memory, the LS-SVM server processes the data and finds the process parameter with the maximum top coal discharge rate, and then the process parameter is reflected to the display.
5. The parameter adjusting device for the coal caving process for improving the caving rate of top coal according to claim 4, wherein the electronic weighing device (63) is arranged below the rear scraper conveyor (72) and is uniformly arranged along the direction of the rear scraper conveyor (72).
6. The parameter adjusting device for the coal caving process for improving the top coal caving rate according to claim 5, wherein the number of the infrared sensing devices (61) is equal to that of the electronic weighing devices (63) and corresponds to one; each infrared sensing device (61) is arranged on a hydraulic support (71) adjacent to the electronic weighing device (63) corresponding to the infrared sensing device.
7. The parameter adjusting device for the coal caving process for improving the caving rate of top coal according to claim 6, wherein the electronic weighing device (63) is an electronic scale.
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|---|---|---|---|---|
| CN109763823B (en) * | 2019-03-25 | 2020-03-06 | 中国矿业大学(北京) | Automatic coal caving control system and method |
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