CN103775122A - Simulation experiment device of gas extraction and coal spontaneous combustion of spontaneous combustion-prone and high gas concentration coal seam goaf - Google Patents
Simulation experiment device of gas extraction and coal spontaneous combustion of spontaneous combustion-prone and high gas concentration coal seam goaf Download PDFInfo
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- CN103775122A CN103775122A CN201410064942.6A CN201410064942A CN103775122A CN 103775122 A CN103775122 A CN 103775122A CN 201410064942 A CN201410064942 A CN 201410064942A CN 103775122 A CN103775122 A CN 103775122A
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Abstract
The invention discloses a simulation experiment device of gas extraction and coal spontaneous combustion of a spontaneous combustion-prone and high gas concentration coal seam goaf. The simulation experiment device of the gas extraction and the coal spontaneous combustion of the spontaneous combustion-prone and high gas concentration coal seam goaf comprises a U-shaped working surface coal mining system, a ventilation system, a gas system, an extraction system, a data test and acquisition system. The U-shaped working surface coal mining system comprises an air inlet roadway, an air return roadway, a working surface and a goaf. The ventilation system comprises an exhaust ventilator and an accessory of the exhaust ventilator. The gas system comprises a gas bottle, a valve, a pressure gauge and a gas feeding pipe. The extraction system comprises a gas drainage pump, a gas drainage pipe, a valve, a flowmeter and a negative pressure sensor. The data test and acquisition system comprises an air velocity sensor, a gas concentration sensor, a temperature sensor, a co sensor, a data acquisition module, an IPC (Industrial Personal Computer) and the like. The simulation experiment device of the gas extraction and the coal spontaneous combustion of the spontaneous combustion-prone and high gas concentration coal seam goaf can truly simulate the relation between the gas extraction and the coal spontaneous combustion of the spontaneous combustion-prone and high gas concentration coal seam goaf to achieve the simultaneous testing of gas drainage and coal spontaneous combustion.
Description
Technical field
The present invention relates to a kind of Coal Mining Technology, relate in particular to a kind of easily the goaf gas extraction of spontaneous combustion high gas layer and spontaneous combustionof coal analogue experiment installation.
Background technology
Mine gas is in coal production process, from the general name of the various gases gushed out in coal, rock.In recent years, along with adopting dark increase, highly gassy mine, coal and gas outburst mine get more and more, and gas accident is continuous.At present, the major measure that gas control is taked is exactly gas drainage under suction, wherein just comprises goaf gas drainage, but some colliery carry out goaf gas drainage administer upper corner gas exceeding limit problem in the danger of spontaneous combustionof coal.If gas drainage under suction negative pressure is excessive, leaking out in goaf will increase, and can increase the danger of spontaneous combustionof coal.If gas drainage under suction negative pressure is too small, in goaf, to leak out and will reduce, the danger of spontaneous combustionof coal also can reduce, and will increase to the gas of upper corner but gush out in goaf, and causing gas exceeding limit to report to the police affects production and safety of coal mines.Therefore, find the relation between suitable gas drainage under suction and spontaneous combustionof coal most important for controlling upper corner gas exceeding limit and spontaneous combustionof coal.Now, study for the means of the multiplex numerical simulation of this problem, but because numerical simulation often will be ignored several factors and just can make, larger with actual conditions deviation, limited for actual guiding value.
Summary of the invention
The object of this invention is to provide a kind of easily the goaf gas extraction of spontaneous combustion high gas layer and spontaneous combustionof coal analogue experiment installation, can the goaf gas extraction of the easy spontaneous combustion high gas layer of real simulation and spontaneous combustionof coal between relation, test to realize to gas drainage under suction and spontaneous combustionof coal time, formulate gas drainage under suction measure and prevent spontaneous combustionof coal measure that foundation is provided for actual colliery, prevent the generation of spontaneous combustionof coal and gas exceeding limit problem.
The object of the invention is to be achieved through the following technical solutions:
Easy spontaneous combustion high gas layer goaf gas extraction of the present invention and spontaneous combustionof coal analogue experiment installation, comprise U-shaped work plane coal mining system, ventilation system, gas train, extraction system, data test acquisition system;
Described U-shaped work plane coal mining system comprises intake, return aircourse, work plane, goaf;
Described ventilation system comprises exhaust ventilation machine and the annex thereof of being located at exit, described return aircourse;
Described gas train comprises gas bottle, valve, pressure meter, gas feeding pipe;
Described extraction system comprises gas suction pump, gas drainage pipeline, valve, flow meter, B/P EGR Back Pressure Transducer EGR;
The outlet of described gas feeding pipe and the import of described gas drainage pipeline extend into respectively in described goaf;
Described data test acquisition system comprises the air velocity transducer of being located at described intake, return aircourse and work plane, also comprises gas concentration sensor, temperature pick up and the co sensor of being located at described goaf;
Described air velocity transducer, gas concentration sensor, temperature pick up, co sensor are connected with Industrial Personal Computer (IPC) by data acquisition module respectively.
As seen from the above technical solution provided by the invention, easy spontaneous combustion high gas layer goaf gas extraction and spontaneous combustionof coal analogue experiment installation that the embodiment of the present invention provides, owing to comprising U-shaped work plane coal mining system, ventilation system, gas train, extraction system, data test acquisition system, can the goaf gas extraction of the easy spontaneous combustion high gas layer of real simulation and spontaneous combustionof coal between relation, test to realize to gas drainage under suction and spontaneous combustionof coal time, for formulating gas drainage under suction measure and prevent spontaneous combustionof coal measure that foundation is provided in actual colliery, prevent the generation of spontaneous combustionof coal and gas exceeding limit problem.
Accompanying drawing explanation
The easy spontaneous combustion high gas layer goaf gas extraction that Fig. 1 provides for the embodiment of the present invention and the layout schematic diagram of spontaneous combustionof coal analogue experiment installation;
Fig. 2 is the layout schematic diagram of gas train in the embodiment of the present invention.
In figure: 1, exhaust ventilation machine, 2, valve, 3, gas suction pump, 4, flow meter, 5, gas drainage pipeline, 6, B/P EGR Back Pressure Transducer EGR, 7, gas inlet, 8, gas concentration sensor, 9, temperature pick up, 10, co sensor, 11, data acquisition module, 12, Industrial Personal Computer (IPC), 13, air velocity transducer, 14, pressure meter and reducing valve, 15, gas bottle.
The specific embodiment
To be described in further detail the embodiment of the present invention below.
Easy spontaneous combustion high gas layer goaf gas extraction of the present invention and spontaneous combustionof coal analogue experiment installation, its preferably the specific embodiment be:
Comprise U-shaped work plane coal mining system, ventilation system, gas train, extraction system, data test acquisition system;
Described U-shaped work plane coal mining system comprises intake, return aircourse, work plane, goaf;
Described ventilation system comprises exhaust ventilation machine and the annex thereof of being located at exit, described return aircourse;
Described gas train comprises gas bottle, valve, pressure meter, gas feeding pipe;
Described extraction system comprises gas suction pump, gas drainage pipeline, valve, flow meter, B/P EGR Back Pressure Transducer EGR;
The outlet of described gas feeding pipe and the import of described gas drainage pipeline extend into respectively in described goaf;
Described data test acquisition system comprises the air velocity transducer of being located at described intake, return aircourse and work plane, also comprises gas concentration sensor, temperature pick up and the co sensor of being located at described goaf;
Described air velocity transducer, gas concentration sensor, temperature pick up, co sensor are connected with Industrial Personal Computer (IPC) by data acquisition module respectively.
Described return aircourse and work plane are also respectively equipped with gas concentration sensor, temperature pick up and co sensor.
Between described work plane and goaf, separate with canvas, on canvas, arrange multiple micropores simultaneously.
State the micropore uneven distribution on canvas, the micropore at the position of the corresponding intake in canvas two ends and return aircourse is arranged the micropore layout quantity of quantity more than canvas middle part.
Described work plane is provided with alarm.
Coupling effect when the present invention can simulation test goaf gas drainage and between spontaneous combustionof coal, for formulating gas to actual colliery and coal spontaneous combustion control measures provides theoretical foundation.
Specific embodiment:
As shown in Figure 1 and Figure 2, comprise U-shaped work plane coal mining system, ventilation system, gas train, extraction system, data test acquisition system.U-shaped work plane is made up of an intake, a return aircourse, work plane, goaf etc., ventilation system comprises exhaust ventilation machine, fixture, gas train comprises gas bottle, valve, pressure meter, pipeline, extraction system comprises gas suction pump, releasing pipe, valve, flow meter, vacuum table, and data test acquisition system comprises air velocity transducer, temperature pick up, co sensor, connecting line, data acquisition module, power supply, Industrial Personal Computer (IPC), data processing software etc.
Between work plane and goaf, separate with canvas, on canvas, arrange some micropores simultaneously, leak out to produce, goaf air leaking situation in Reality simulation situation.Uneven distribution when micropore is arranged on canvas, at two ends, the local micropore in corresponding intake and return aircourse is arranged some morely, and other place is less, and specifically how much being determined by experiment of its layout, to meet the requirements of inleakage; Exhaust ventilation machine can produce different air quantity, with the asynchronous situation of leaking out of ventilation volume in Reality simulation situation;
Gas suction pump can produce different negative pressure of suctions, with the situation of different extraction negative pressure in Reality simulation situation;
In goaf, will be scattered coal and rock not of uniform size, goaf situation and spontaneous combustionof coal situation in Reality simulation situation;
In goaf, to arrange temperature pick up and co sensor, to monitor spontaneous combustionof coal situation;
In return aircourse, to arrange air velocity transducer, to grasp in time the ventilation volume of return aircourse;
In return aircourse, also to arrange temperature pick up and co sensor, to monitor spontaneous combustionof coal situation;
Intake and work plane also will be arranged air velocity transducer, to grasp in time the inleakage in goaf;
Gas train is connected by air inlet pipe with goaf, with adjacent layer in Reality simulation situation and lose coal ceaselessly to goaf drainage gas;
Drainage system flow meter is mainly monitored the flow of gas drainage system pipeline, and vacuum table is mainly monitored the negative pressure of suction of gas drainage system, analyzes the relation between gas pumping and spontaneous combustionof coal.
The job step of specific embodiment is:
First, broken coal and rock not of uniform size are scattering into goaf; Then, goaf and work plane are separated with canvas, canvas is fixed, device entirety is debugged; Then, data test acquisition system, ventilation system, gas train, drainage system are opened successively, experiment starts; Finally, when monitored data shows that co produces, temperature raises, and can judge coal generation spontaneous combustion time, experiment finishes.
The above; only for the preferably specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. easy spontaneous combustion high gas layer goaf gas extraction and a spontaneous combustionof coal analogue experiment installation, is characterized in that, comprises U-shaped work plane coal mining system, ventilation system, gas train, extraction system, data test acquisition system;
Described U-shaped work plane coal mining system comprises intake, return aircourse, work plane, goaf;
Described ventilation system comprises exhaust ventilation machine and the annex thereof of being located at exit, described return aircourse;
Described gas train comprises gas bottle, valve, pressure meter, gas feeding pipe;
Described extraction system comprises gas suction pump, gas drainage pipeline, valve, flow meter, B/P EGR Back Pressure Transducer EGR;
The outlet of described gas feeding pipe and the import of described gas drainage pipeline extend into respectively in described goaf;
Described data test acquisition system comprises the air velocity transducer of being located at described intake, return aircourse and work plane, also comprises gas concentration sensor, temperature pick up and the co sensor of being located at described goaf;
Described air velocity transducer, gas concentration sensor, temperature pick up, co sensor are connected with Industrial Personal Computer (IPC) by data acquisition module respectively.
2. easy spontaneous combustion high gas layer goaf gas extraction according to claim 1 and spontaneous combustionof coal analogue experiment installation, is characterized in that, described return aircourse and work plane are also respectively equipped with gas concentration sensor, temperature pick up and co sensor.
3. easy spontaneous combustion high gas layer goaf gas extraction according to claim 1 and 2 and spontaneous combustionof coal analogue experiment installation, is characterized in that, between described work plane and goaf, separates with canvas, arranges multiple micropores on canvas simultaneously.
4. easy spontaneous combustion high gas layer goaf gas extraction according to claim 3 and spontaneous combustionof coal analogue experiment installation, it is characterized in that, micropore uneven distribution on described canvas, the micropore at the position of the corresponding intake in canvas two ends and return aircourse is arranged the micropore layout quantity of quantity more than canvas middle part.
5. easy spontaneous combustion high gas layer goaf gas extraction according to claim 4 and spontaneous combustionof coal analogue experiment installation, is characterized in that, described work plane is provided with alarm.
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| CN104500140A (en) * | 2014-12-16 | 2015-04-08 | 华北科技学院 | Coal mine gas disaster multi-parameter and multipoint monitoring device |
| CN104696007A (en) * | 2015-02-03 | 2015-06-10 | 太原理工大学 | Method for increasing gas extraction concentration and flow in goaf in coal mining process |
| CN105067220A (en) * | 2015-09-11 | 2015-11-18 | 中国矿业大学 | Mine ventilation network system experimental device and method |
| CN105422167A (en) * | 2015-12-10 | 2016-03-23 | 华北科技学院 | Gas drainage pipeline environment simulation device |
| CN105954459A (en) * | 2016-04-27 | 2016-09-21 | 河南理工大学 | Device for detecting influence of coal mine goaf gas drainage on coal spontaneous combustion |
| CN106050295A (en) * | 2016-04-28 | 2016-10-26 | 西安科技大学 | Gas gushing simulating system used in physics resemble simulation experiments |
| CN107144679A (en) * | 2017-04-10 | 2017-09-08 | 北京科技大学 | Dynamic similarity experimental bench and method for simulating goaf oxidation warming law |
| CN109083677A (en) * | 2018-11-05 | 2018-12-25 | 河南工程学院 | A kind of coal seam goaf gas drainage spontaneous combustion imitative experimental appliance |
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