CN103216232B - Method for automatically regulating and controlling conveying load of high-gas coal face - Google Patents
Method for automatically regulating and controlling conveying load of high-gas coal face Download PDFInfo
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- CN103216232B CN103216232B CN201310121936.5A CN201310121936A CN103216232B CN 103216232 B CN103216232 B CN 103216232B CN 201310121936 A CN201310121936 A CN 201310121936A CN 103216232 B CN103216232 B CN 103216232B
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- 239000003245 coal Substances 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 9
- 230000001276 controlling effect Effects 0.000 title abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- 238000005065 mining Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The invention provides a method for automatically regulating and controlling a conveying load of a high-gas coal face, belonging to a method for automatically regulating and controlling the conveying load of the coal face. Establishing a rectangular space coordinate system for the coal seam, and obtaining the gas content g of the coal seam of unit mass by exploring and analyzing the gas content characteristics of each point of the coal seam in unit massGas (es). Then, the real-time concentration c of the gas on the working face is measured according to a gas detector arranged on a scraper conveyor (the concentration is ensured not to exceed the limit, namely less than 1 percent specified by the state, and the coal cutting is stopped if the concentration exceeds the limit) because of the fact thatCalculate outThereby obtaining the coal falling amount per unit time at the momentThe coal conveying amount of the scraper conveyor in unit time is M, and when the coal falling amount M is larger than M, the coal cutting speed of a coal cutter is reduced, so that the conveyor is not overloaded, and the safety is ensured; when the coal falling amount M is less than MIn time, the coal cutting speed of the coal mining machine can be properly increased, and the transportation efficiency is improved.
Description
Technical field
The present invention relates to coal-face conveying load method for automatically regulating, and relate to the method for a kind of high methane coal-face auto-control conveying load especially.
Background technology
China's girdle resource reserve is abundant, Regional Distribution is extensive, and its occurrence form is multiplicity, and proved reserves account for coal gross reserves about 20%.In recent years, for ensureing the equilibrium of mine capacity, the length of service extending mine, raising resource recovery ratio, the exploitation of girdle and Mining Equipment particularly high-efficient automatic production technique and equipment just more and more cause the attention of country and relevant industries.But the roboticized mining techniques outfit of China is relatively backward, main one side is some key technologies and the equipment not solution of automated mining needs, and the automatic control of conveyer load is exactly one of them aspect.Because the transport link that to be in coal mining process one important, can whether the control planning of transporter load can normally run to transportation system, and carry out fortune coal efficiently.In addition, China's girdle gas bearing capacity is relatively high, or utilizes exploitation girdle to carry out gas release to adjacent coal seam, and therefore, face gas content is higher.On the other hand, the gas that coal-winning machine discharges after being cut off by coal from coal is the main source of face gas, and gas burst size and coal cutting amount are proportionate.Therefore can by realizing the Real-Time Monitoring of face gas concentration, to the auto-control of conveying load, guaranteeing that face gas content does not transfinite simultaneously.
In sum, the auto-control of high methane coal-face conveying load is very important.But existing regulate and control method mainly relies on work plane manually to come, also exist regulation and control not in time, problem that potential safety hazard is many, and for thin seam working surface, manual operation is more difficult, or control methods are complicated, and cost is high.How to come automatically according to coal seam gas-bearing capacity, regulate and control work plane carriage load exactly, guarantee that work plane is transported safely, to improving conevying efficiency and preventing face gas content from transfiniting, there is practical significance.
Summary of the invention
The object of the invention is to provide a kind of method can carrying out the high methane coal-face auto-control conveying load of auto-control to coal shearer speed, thus ensures conveyer safety, runs efficiently.
For reaching above-mentioned purpose, the present invention proposes the method for a kind of high methane coal-face auto-control conveying load, comprises the following steps:
A) according to the result of geological prospecting, analyze the gas bearing capacity feature of coal seam each point unit mass coal, and then coal-bed gas density g can be drawn
gas;
B) measure to obtain gas real-time concentration c according to the gas density that drag conveyor is installed, wherein namely real-time concentration c is less than 1% of national regulation, if transfinite stopping coal cutting;
C) the coal breakage amount m in unit of account time service face;
D) compare the fortune coal amount M of work plane unit interval coal breakage amount m and drag conveyor unit interval, judge conveyer condition of loading, and coal-winning machine coal cutting speed is regulated.
Further, wherein coal breakage amount m circular is as follows in step c):
Known work face gas density is:
calculate
thus show that the coal breakage amount of now unit interval is
wherein, Q is the intake of work plane; The multiple of η to be Gas Outflow From Worked-out Area be work plane outburst amount; q
coalfor gas emission in coal seam.
Further, wherein in step d)
As m > M, then should reduce the coal cutting speed of coal-winning machine, reduce coal breakage amount, be specially and reduce coal shearer speed by 3% ~ 5% amplitude, after 5 ~ 15 minutes, continue the fortune coal amount M comparing coal breakage amount m and conveyer, repeat above operation, until m ≈ M, guarantee conveyer non-overloading with this, ensure safety;
As coal breakage amount m < M, then suitably can accelerate the coal cutting speed of coal-winning machine, improve conevying efficiency, the amplitude be specially by 3% ~ 5% increases coal shearer speed, after 5 ~ 15 minutes, continue the fortune coal amount M comparing coal breakage amount m and conveyer, repeat above operation, until m ≈ M.In order to ensure safety, must adjusting range be increased when coal breakage amount is large, and must amplitude slowing down when increasing coal shearer speed, in order to avoid gas exceeding limit, so the amplitude reduced is greater than the amplitude of increase.
The invention has the beneficial effects as follows: owing to have employed such scheme, drawing coal breakage amount by monitoring the real-time concentration of gas, then the coal cutting speed of coal-winning machine being regulated and controled, thus ensure conveyer safety, run efficiently.Therefore at high gas face, particularly in high methane girdle automation Manless mining work plane, the load for conveyer has good regulating and controlling effect, thus reaches efficient, the safe working of work plane.
Accompanying drawing explanation
Fig. 1 is that the high methane coal-face of the embodiment of the present invention regulates conveying to meet the flow chart of method automatically.
Detailed description of the invention
In order to more understand technology contents of the present invention, institute's accompanying drawings is coordinated to be described as follows especially exemplified by specific embodiment.
As shown in Figure 1, the flow process of the method for high methane coal-face auto-control conveying load is as follows:
First, according to the result of geological prospecting, analyze the gas bearing capacity feature of coal seam each point unit mass coal, and then coal-bed gas density g can be drawn
gas;
Then, measure to obtain the real-time concentration c of face gas according to the gas density that drag conveyor is installed, wherein real-time concentration c does not transfinite, and is namely less than 1% of national regulation, if transfinite stopping coal cutting;
Then, the coal breakage amount m in unit of account time service face, coal breakage amount m circular is as follows:
Known work face gas density is:
calculate
thus show that the coal breakage amount of now unit interval is
wherein, Q is the intake of work plane; The multiple of η to be Gas Outflow From Worked-out Area be work plane outburst amount; Q coal is gas emission in coal seam.；
Relatively work plane unit interval coal breakage amount m and the fortune coal amount M of conveyer unit interval, judges conveyer condition of loading, and regulates coal-winning machine coal cutting speed.Consider that gas density meter also exists regular hour delay, coal-winning machine coal cutting speed is by certain changes in amplitude, and coal shearer speed amplitude of variation then should according to coal-bed gas density g
gasset, if g
gasrelatively large (as high gas layer and coal and gas prominent coal seam) then coal shearer speed amplitude of variation should less (as 5%) and for g
gasthe smaller coal seam then amplitude of accommodation should suitably increase (as 10%).
H, as m > M, then should reduce the coal cutting speed of coal-winning machine, reduce coal breakage amount.Be specially and reduce coal shearer speed by certain amplitude (as reduced by 5%), after waiting 5 minutes, continue the fortune coal amount M comparing coal breakage amount m and conveyer, repeat above operation, until m ≈ M, guarantee conveyer non-overloading with this, ensure safety;
I, as coal breakage amount m < M, then suitably can accelerate the coal cutting speed of coal-winning machine, improve conevying efficiency, be specially by certain amplitude (as increased by 3%, increasing degree should suitably reduce, in case gas density transfinites) reduce coal shearer speed, continue the fortune coal amount M comparing coal breakage amount m and conveyer after waiting 5 minutes, repeat above operation, until m ≈ M.
In sum, the method of high methane coal-face auto-control conveying load of the present invention, first drawing coal breakage amount by monitoring the real-time concentration of gas, then auto-control being carried out to the coal cutting speed of coal-winning machine, thus ensure conveyer safety, run efficiently.Therefore at high gas face, particularly in high methane girdle automation Manless mining work plane, the load for conveyer has good regulating and controlling effect, thus reaches efficient, the safe working of work plane.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (1)
1. a method for high methane coal-face auto-control conveying load, is characterized in that, comprise the following steps:
A) according to the result of geological prospecting, analyze the gas bearing capacity feature of coal seam each point unit mass coal, and then coal-bed gas density g can be drawn
gas;
B) measure to obtain gas real-time concentration c according to the gas density that drag conveyor is installed, wherein real-time concentration c is less than 1% of national regulation, if transfinite stopping coal cutting;
C) the coal breakage amount m in unit of account time service face;
D) compare the fortune coal amount M of work plane unit interval coal breakage amount m and drag conveyor unit interval, judge conveyer condition of loading, and coal-winning machine coal cutting speed is regulated:
As m > M, then should reduce the coal cutting speed of coal-winning machine, reduce coal breakage amount, be specially and reduce coal shearer speed by 3% ~ 5% amplitude, after 5 ~ 10 minutes, continue the fortune coal amount M comparing coal breakage amount m and conveyer, repeat above operation, until m ≈ M, guarantee conveyer non-overloading with this, ensure safety;
As coal breakage amount m < M, then suitably accelerate the coal cutting speed of coal-winning machine, improve conevying efficiency, the amplitude be specially by 1% ~ 3% increases coal shearer speed, after 5 ~ 10 minutes, continue the fortune coal amount M comparing coal breakage amount m and conveyer, repeat above operation, until m ≈ M.
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| US10208592B2 (en) * | 2015-12-02 | 2019-02-19 | Joy Global Underground Mining Llc | Longwall optimization control |
| CN112282755B (en) * | 2020-10-29 | 2022-09-16 | 国家能源集团乌海能源有限责任公司 | Coal mining machine and scraper conveyor linkage control method and system based on gas detection |
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| CN1888390A (en) * | 2006-07-12 | 2007-01-03 | 山西潞安矿业(集团)有限责任公司 | High gas yoke thick coal seam quasi-large-scale mining and high comprehensive mining low-level caving technique |
| CN101852088B (en) * | 2006-09-05 | 2013-01-30 | 玛珂系统分析和开发有限公司 | Method for controlling dismantling device |
| CN101737048A (en) * | 2008-11-25 | 2010-06-16 | 卢泉生 | Remote control monitoring coal mining method |
| US8262167B2 (en) * | 2009-08-20 | 2012-09-11 | George Anthony Aulisio | Apparatus and method for mining coal |
| CN102518465A (en) * | 2011-12-30 | 2012-06-27 | 大同煤矿集团有限责任公司 | Method for pumping high-position drilling gas from high gas working face |
| CN202630098U (en) * | 2012-06-25 | 2012-12-26 | 沈阳工程学院 | Coal quantity monitoring device of scraper coal feeder |
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