CN102095835B - Device for simulating coal and gas outburst experiment - Google Patents
Device for simulating coal and gas outburst experiment Download PDFInfo
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- CN102095835B CN102095835B CN201110021828.1A CN201110021828A CN102095835B CN 102095835 B CN102095835 B CN 102095835B CN 201110021828 A CN201110021828 A CN 201110021828A CN 102095835 B CN102095835 B CN 102095835B
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Abstract
The invention discloses a device for simulating a coal and gas outburst experiment, which comprises a coal sample chamber and gas pressure loading equipment. At least one coal sample cavity for placing a coal sample is formed in the coal sample chamber; the gas pressure loading equipment comprises a gas bottle and a pressurizing gas channel connected with the gas bottle; the pressurizing gas channel is communicated with the coal sample cavity in the coal sample chamber; a coal and gas outburst port communicated with the coal sample cavity during working is formed on the coal sample chamber; a control device for controlling the outburst port to be communicated is arranged at the coal and gas outburst port; pressure collection equipment for detecting pressure in the coal sample chamber is arranged on the coal sample chamber; a first camera for shooting the coal sample in the coal sample cavity is arranged outside the coal sample chamber; a transparent part corresponding to the first camera is arranged on the coal sample chamber; a second camera which is used for shooting coal and gas outburst is arranged outside the coal sample chamber corresponding to the coal and gas outburst port; and a vibrator for driving the coal sample chamber to vibrate vertically is arranged on the lower part of the coal sample chamber.
Description
Technical field
The invention belongs to coal scientific research technical field, particularly a kind of coal and Gas Outburst experimental simulation device.
Background technology
Coal and Gas Outburst are a kind of extraordinary serious natural calamities of serious threat mine safety down-hole.It not only threatens the personal safety of Coal Mine Staff, is also the principal element of restriction coal production efficiency.China is one of country that disaster is the most serious in the world, and nearly ten years, nearly 1,600 hundred million yuan of every annual casualty loss, is equivalent to 3.8 ﹪ of gross national product (GNP), and this ratio is the more than ten times of developed country.Numerous workmans, cadre and scientific and technical personnel on China coal industry battle line, in the outstanding process of struggling of same coal and gas, accumulated relatively rich experience, everybody thinks more consistent viewpoint: coal and Gas Outburst are the results under the actings in conjunction such as terrestrial stress, gas pressure, Coal Pore Structure.Occur in coal and the Gas Outburst of down-hole, have the time short, endanger the features such as large, cause the process of coal and Gas Outburst, be difficult to by real observation and record outstanding overall process occurs, this has also caused not clear for the mechanism that coal and Gas Outburst occur at present, and then has affected the development of coal and gas outburst prevention treatment technology.
The intensity that while generation in order to understand better coal and Gas Outburst, under the variation of various parameters, different condition, coal and Gas Outburst occur and the mechanism of outstanding generation, spy develops a kind of coal and Gas Outburst experimental simulation device, so that can be for explaining that coal and Gas Outburst provide a kind of thinking.
Summary of the invention
The object of the present invention is to provide a kind of coal and Gas Outburst experimental simulation device, when for coal and Gas Outburst various parameters change be difficult to record, outstanding process is difficult to the technical matters of being recorded truly.
For achieving the above object, the present invention adopts following technical scheme: a kind of coal and Gas Outburst experimental simulation device, comprise coal sampling mill and air pressure loading equipemtn, in described coal sampling mill, be provided with at least one for placing the coal sample die cavity of coal sample, air pressure-loading equipment comprises gas gas cylinder and the pressurized gas passage being connected with gas gas cylinder, described pressurized gas passage is connected with the coal sample die cavity in coal sampling mill, the blowout of coal and gas mouth being communicated with coal sample die cavity while being provided with work on coal sampling mill, at blowout of coal and gas mouth, place is provided with the control device for controlling ejiction opening conducting, on coal sampling mill, be provided with the pressure acquisition equipment for detection of coal sampling mill internal pressure, be outside equipped with the first camera for the inner coal sample of coal sample die cavity is taken pictures at coal sampling mill, coal sampling mill is provided with the transparent part corresponding with the first camera, outside coal sampling mill, be provided with the second camera for taking blowout of coal and gas corresponding to the position of blowout of coal and gas mouth, be provided with the electromagnetic shaker for driving coal sampling mill vertical tremor in coal sampling mill bottom.
Described electromagnetic shaker is parallel is provided with two, and two electromagnetic shakers are divided into the two ends of coal sampling mill.
Described electromagnetic shaker comprises cylinder and piston, the top of piston is fixedly connected with coal sampling mill, the sealed bottom of piston is slidedly assemblied in cylinder, in the cooperation section corresponding with throw of poston of cylinder, be provided with exhausr port, on cylinder, below exhausr port, be provided with air intake opening, this air intake opening is connected with pressurizer by pipeline.
The pressure acquisition equipment arranging on described coal sampling mill comprises corresponding to each coal sample die cavity set tensimeter or pressure transducer for detection of coal sample die cavity internal pressure.
Coal sample die cavity in described coal sampling mill has two at least, at least two described coal sample die cavities are separated by the separating device being arranged in coal sampling mill, and described pressurized gas passage comprises the corresponding independently input gas passage being connected with each coal sample die cavity.
Described pressurized gas passage also comprises for connecting gas gas cylinder and each air source distributor of independently inputting gas passage.
Described independently input is provided with the flowmeter for checking gas passage methane gas flow on gas passage.
Described separating device is the rotary valve arranging between adjacent coal sample die cavity.
The blowout of coal and gas mouth of described coal sampling mill is arranged on the end, one end of coal sampling mill, described for control the control device of blowout of coal and gas mouth conducting be on coal sampling mill corresponding to the set baffle plate in end, one end that is provided with blowout of coal and gas mouth, be provided with in the end that baffle plate is installed of coal sampling mill for collecting from the coal of blowout of coal and gas mouth ejection and the gatherer of gas.
The blowout of coal and gas mouth of described coal sampling mill is corresponding to each set multiple spouts that are independent of each other of coal sample die cavity independently on coal sampling mill, described for control the control device of blowout of coal and gas mouth conducting be on coal sampling mill corresponding to the set multiple baffle plates in the position of each spout, be provided with in the position that baffle plate is installed of coal sampling mill for collecting from the coal of nozzle ejection and the gatherer of gas.
The invention has the beneficial effects as follows: coal of the present invention and Gas Outburst experimental simulation device comprise coal sampling mill, coal sampling mill is by air pressure loading device air feed, on coal sampling mill, be provided with blowout of coal and gas mouth, coal sampling mill bottom is provided with the electromagnetic shaker for driving coal sampling mill vibrations, and is outside equipped with the first camera and the second camera for image data at coal sampling mill.While using experimental simulation device provided by the present invention, in the coal sample die cavity of coal sampling mill, put into coal sample to be detected, in coal sample die cavity, be filled with saturated methane gas by air pressure loading device, then shaken with suitable frequency and amplitude driving coal sampling mill by electromagnetic shaker, in the time that coal sample is mixed saturated methane gas and is sprayed from blowout of coal and gas mouth, pass through to capture image data by the first camera and the second camera, make the curve of reflection coal and Gas Outburst amount according to the data of collecting.In the present invention, coal sampling mill can be simulated pressure and the coal body physical force of gas, and drive coal sampling mill to shake by electromagnetic shaker, make the coal of the more approaching reality of whole simulation process and the destructive process of Gas Outburst and coal, and can clearly observe and record, for the prediction and prevention of coal and Gas Outburst provides middle theoretical foundation.By control device, blowout of coal and gas mouth place is closed, coal sampling mill is closed like this, inputs methane gas by air pressure loading device in coal sampling mill, thus simulation coal body physical force and gas pressure.The present invention is simple in structure, cost of manufacture is low, realizes visual monitoring, experimental simulation coal and Gas Outburst with lower cost and simple structure.Setting pressure collecting device on the coal sampling mill that provided in the present invention, thereby can monitor the pressure of methane gas in coal sampling mill, can make like this coal of whole device under the various different pressures of simulated experiment and Gas Outburst time, be convenient to experimenter's operation and record.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the electromagnetic shaker part-structure schematic diagram in Fig. 1.
Embodiment
Embodiment 1:
As Fig. 1, shown in Fig. 2, a kind of coal and Gas Outburst experimental simulation device, comprise coal sampling mill 12 and air pressure loading equipemtn, in coal sampling mill 12, be provided with multiple for placing the coal sample die cavity of coal sample, air pressure-loading equipment comprises gas gas cylinder 1 and the pressurized gas passage being connected with gas gas cylinder 1, the internal communication of the coal sample die cavity in the pressurized gas passage of air pressure-loading equipment and coal sampling mill 12, the blowout of coal and gas mouth being communicated with coal sample type while being provided with work on coal sampling mill 12, at blowout of coal and gas mouth, place is provided with the control device for controlling ejiction opening conducting, be provided with at blowout of coal and gas mouth place for collecting the coal that sprays from coal sampling mill and the gatherer 9 of gas, on coal sampling mill 12, be provided with the pressure acquisition equipment for detection of coal sampling mill internal pressure, pressure acquisition device in the present embodiment is the tensimeter 4 for detection of coal sampling mill internal pressure arranging on coal sampling mill, when concrete enforcement, other pressure-detecting devices such as all right adopts pressure sensor are as pressure acquisition equipment, be outside equipped with for coal sampling mill inside coal sample being taken pictures with the first camera 8 of image data at coal sampling mill 12, on coal sampling mill 12, be provided with the transparent part corresponding with the first camera 8, transparent region 11 on coal sampling mill 12 as shown in Figure 1, outside coal sampling mill, be provided with the second camera 22 of state when taking blowout of coal and gas corresponding to the position of blowout of coal and gas mouth, be provided with the electromagnetic shaker 7 for driving coal sampling mill vibrations in coal sampling mill 12 bottoms, electromagnetic shaker is parallel is in the present embodiment provided with two, two electromagnetic shakers are divided into the two ends of coal sampling mill, synchronization action when two electromagnetic shaker work, electromagnetic shaker comprises cylinder 16 and piston 14 in the present embodiment, the top of piston 14 is fixedly connected with coal sampling mill 12, the sealed bottom of piston 12 is slidedly assemblied in cylinder 16, in the cooperation section corresponding with piston 14 strokes of cylinder 16, be provided with exhausr port 15, on cylinder 16, below exhausr port, be provided with air intake opening 17, air intake opening 17 is connected with pressurizer 13 by pipeline.
As shown in Figure 2, pressurizer 13 pressurizes in cylinder 16 by pipeline and air intake opening 17, in the time that the bottom of piston 14 thrust is upwards greater than the pressure that coal sampling mill that piston bears and self gravitation form, piston 14 moves upward, in the time that piston movement arrives the top of exhausr port 15, gas leaks by exhausr port 15.The thrust of piston bottom reduces, until be less than pressure that piston bears, under the pressure-acting that piston forms at coal sampling mill and self gravitation, move downward, block exhausr port 15, then the thrust of piston bottom rises again, in the time that the bottom of piston 14 thrust is upwards greater than piston at suffered pressure, piston 14 moves upward again, so moves in circles coal sampling mill is shaken.
As shown in Figure 1, pressurizer 13 is two electromagnetic shakers air feed simultaneously to the left and right, and in cylinder 16, be provided with the limited block 18 spacing for the smallest limit position to throw of poston, the structure of two electromagnetic shakers is incomplete same, the piston of right electromagnetic shaker is made up of two parts, right electromagnetic shaker comprises piston rod shape top 23 and piston tubular lower 24, the top on piston rod shape top 23 is fixedly connected with coal sampling mill 12, piston tubular lower 24 is slidedly assemblied in cylinder, on the tube wall of piston tubular lower 24 along the axis of the piston to being provided with multiple mounting holes, be provided with the through hole corresponding with mounting hole in piston tubular lower in the bottom on piston rod shape top 23, by pin, piston rod shape top is fixedly connected with piston tubular lower.When concrete enforcement, can adjust by adjusting the interconnected relationship of piston rod shape top and piston tubular lower the level angle of coal sampling mill, thus the different angle in simulation coal seam.
In above-described embodiment, adopt two parallel electromagnetic shakers that arrange to drive coal sampling mill vibrations, while specifically enforcement, can adopt an electromagnetic shaker to drive coal sampling mill vibrations, or adopt three electromagnetic shakers to drive coal sampling mill vibrations.
In the present embodiment, electromagnetic shaker drives the vibrations of coal sampling mill along the axis of the piston coal seam when vibrating up and down to simulate coal and Gas Outburst.
Electromagnetic shaker in the present embodiment is pneumatic, and concrete enforcement can also drive coal sampling mill vibrations from the electromagnetic shaker of the low frequency lower pair of employing hydraulic pressure electromagnetic shaker or other structures.
In Fig. 1, coal sampling mill is divided into multiple coal sample die cavities by separating device, in the specific implementation, also can be arranged to a coal sample die cavity, and separating device now need to be set in coal sampling mill.
As shown in Figure 1, coal sampling mill 12 is separated into four independently coal sample die cavities by the separating device being arranged in coal sampling mill, segmenting device is in the present embodiment to be arranged on the rotary valve 5 arranging between adjacent coal sample die cavity, in the time that rotary valve 5 cuts out, coal sampling mill 12 is split into independently coal sample die cavity, now the pressurized gas passage of air pressure-loading equipment comprises with the air source distributor of gas gas cylinder connection with for being connected air source distributor and each independently input gas passage 20 of coal sample die cavity, on gas passage 20, be provided with the flowmeter 3 for checking gas passage methane gas flow respectively independently inputting.
In the present embodiment, as shown in Figure 1, the blowout of coal and gas mouth of described coal sampling mill is arranged on the end, one end of coal sampling mill, described for control the control device of blowout of coal and gas mouth conducting be on coal sampling mill corresponding to be provided with blowout of coal and gas mouth the set baffle plate 6 in end, one end, be provided with in the end that baffle plate is installed of coal sampling mill for collecting from the coal of blowout of coal and gas mouth ejection and the gatherer 9 of gas potpourri.Outside coal sampling mill, be provided with the second camera 22 of state when taking blowout of coal and gas corresponding to the position of the blowout of coal and gas mouth of coal sampling mill.
When test unit in use the present embodiment does coal and Gas Outburst simulated experiment, first the coal sample of choosing 10 is respectively charged into four independently in coal sample die cavity, coal sample 10 is coal sample prefabricated or that choose in advance, coal sample can be identical coal sample, also can be different coal samples, then by gas gas cylinder 1 by air source distributor 2 and respectively independently input gas passage 20 to independently inputting methane gas in coal sample die cavity, pack coal sample and input methane gas in coal sample die cavity time, from left to right carry out successively, after packing selected coal sample in a coal sample die cavity and injecting gas pressure carry out again the loading in next region after reaching requirement of experiment.In gas boosting process, first carry out the pressurization of small displacement, after the air in coal sample die cavity and coal sample is replaced out, then rotary valve 5 to cut out, coal sample die cavity becomes enclosure space, in coal sample die cavity, continues pressurization to guarantee experimental pressure.All install coal sample in all coal sample die cavities after and when its internal gas pressure all reaches requirement of experiment, open rotary valve, electromagnetic shaker 7 drives coal sampling mill 12 to move, then open the baffle plate 6 at blowout of coal and gas mouth place, coal and gas potpourri spray from here, now, the first 8 and 22 pairs, camera transparent observing district and ejiction opening carry out capturing with image data continuously, and by the variation of tensimeter 4, the pressure changing of regional are kept a record.Because carrying out image data by the taken picture of camera is in prior art, in the patent of more existing documents and application, existing description, repeats no more inferior.Last according to the various data of collecting, make the coal of different gas pressures, dissimilar coal sample and the curve of Gas Outburst amount.The experimental simulation device that adopts in the present invention adopts the different gas pressures of coupling analysis, the coal of dissimilar coal sample and the relation of Gas Outburst amount, for solution seam mining provides foundation by dissimilar coal body coal and Gas Outburst problem under different gas pressure states.
In above-described embodiment, independently in coal sample die cavity, pack successively from left to right the coal in virgin stress district, coal, the coal in peak stress district and the coal of stress-relaxed area in stress rising district at four, and in different coal sample die cavities, input the methane gas of different pressures by air source distributor, thereby guarantee that this device does coal and Gas Outburst simulated experiment to the coal seam of different pressures, different coal samples.Also can in two or three or four coal sample die cavities, pack coal sample of the same type into, to the methane gas of inputting different pressures in coal sample die cavity, can detect like this coal and the Gas Outburst amount of coal sample of the same type under different methane gas pressure-actings by air source distributor.
Embodiment 2:
The difference of itself and embodiment 1 is: in coal sampling mill, be dividing plate for coal sampling mill being separated into the independently separating device of coal sample die cavity, dividing plate is fixedly connected with coal sampling mill, and the blowout of coal and gas mouth of described coal sampling mill is corresponding to each set multiple spouts that are independent of each other of coal sample die cavity independently on coal sampling mill, described is corresponding to the set multiple baffle plates in the position of each spout on coal sampling mill for controlling the control device of blowout of coal and gas mouth conducting, now, be provided with in the position that baffle plate is installed of coal sampling mill for collecting from the coal of nozzle ejection and the gatherer of gas, an all corresponding gatherer on each independently coal sample die cavity.
When use, in each independently coal sample die cavity, pack different coal samples into, then in coal sample die cavity, be filled with methane gas, when the pressure of the methane gas in coal sample die cavity reaches requirement of experiment, open electromagnetic shaker, electromagnetic shaker drives coal sampling mill vibrations, then opens baffle plate, coal sample in each coal sample die cavity and methane gas go out ejection from spout, are collected by different gatherers.
As shown in Figure 2, the cylinder 16 in above-mentioned two embodiment is installed on cylinder block 19, for supporting electromagnetic shaker and coal sampling mill.
Experimental simulation device in above-mentioned two embodiment, adopt electromagnetic shaker to drive coal sampling mill vibrations, whole like this simulated experiment process is closer to the truth of coal and Gas Outburst, when use, in methane gas is filled with to coal sample die cavity time, keep air pressure a period of time, methane gas and coal sample are fully adsorbed, then open baffle plate, gather image and pressure data by camera and pressure acquisition device, pressure acquisition equipment is connected with computing machine by outlet line, pressure delta data is inputed in computing machine with record, after having tested, analyze destructive process and the reason thereof of coal, for the explanation of coal and Gas Outburst excitation provides guidance.
Above two embodiment are only unrestricted for technical scheme of the present invention is described; according to spirit of the present invention, those of ordinary skill in the art is available technical scheme of the present invention is carried out be equal to replacement and should drop on equally in protection scope of the present invention.
Claims (9)
1. a coal and Gas Outburst experimental simulation device, it is characterized in that: comprise coal sampling mill and air pressure loading equipemtn, in described coal sampling mill, be provided with at least one for placing the coal sample die cavity of coal sample, air pressure-loading equipment comprises gas gas cylinder and the pressurized gas passage being connected with gas gas cylinder, pressurized gas passage is connected with the inside of the coal sample die cavity in coal sampling mill, the blowout of coal and gas mouth being communicated with coal sample die cavity while being provided with work on coal sampling mill, at blowout of coal and gas mouth, place is provided with the control device for controlling ejiction opening conducting, on coal sampling mill, be provided with the pressure acquisition equipment for detection of coal sampling mill internal pressure, be outside equipped with the first camera for the inner coal sample of coal sample die cavity is taken pictures at coal sampling mill, coal sampling mill is provided with the transparent part corresponding with the first camera, outside coal sampling mill, be provided with the second camera for taking blowout of coal and gas corresponding to the position of blowout of coal and gas mouth, be provided with the electromagnetic shaker for driving coal sampling mill vertical tremor in coal sampling mill bottom, described electromagnetic shaker is parallel is provided with two, two electromagnetic shakers are divided into the two ends of coal sampling mill, synchronization action when two electromagnetic shaker work.
2. coal according to claim 1 and Gas Outburst experimental simulation device, it is characterized in that: described electromagnetic shaker comprises cylinder and piston, the top of piston is fixedly connected with coal sampling mill, the sealed bottom of piston is slidedly assemblied in cylinder, in the cooperation section corresponding with throw of poston of cylinder, be provided with exhausr port, on cylinder, below exhausr port, be provided with air intake opening, this air intake opening is connected with pressurizer by pipeline.
3. coal according to claim 1 and Gas Outburst experimental simulation device, is characterized in that: the pressure acquisition equipment arranging on described coal sampling mill comprises corresponding to each coal sample die cavity set tensimeter or pressure transducer for detection of coal sample die cavity internal pressure.
4. according to coal and Gas Outburst experimental simulation device described in claim 1 or 2 or 3, it is characterized in that: the coal sample die cavity in described coal sampling mill has two at least, at least two described coal sample die cavities are separated by the separating device being arranged in coal sampling mill, and described pressurized gas passage comprises the corresponding independently input gas passage being connected with each coal sample die cavity.
5. coal according to claim 4 and Gas Outburst experimental simulation device, is characterized in that: described pressurized gas passage also comprises for connecting gas gas cylinder and each air source distributor of independently inputting gas passage.
6. coal according to claim 5 and Gas Outburst experimental simulation device, is characterized in that: described independently input is provided with the flowmeter for checking gas passage methane gas flow on gas passage.
7. coal according to claim 4 and Gas Outburst experimental simulation device, is characterized in that: described separating device is the rotary valve arranging between adjacent coal sample die cavity.
8. coal according to claim 7 and Gas Outburst experimental simulation device, it is characterized in that: the blowout of coal and gas mouth of described coal sampling mill is arranged on the end, one end of coal sampling mill, described for control the control device of blowout of coal and gas mouth conducting be on coal sampling mill corresponding to the set baffle plate in end, one end that is provided with blowout of coal and gas mouth, be provided with in the end that baffle plate is installed of coal sampling mill for collecting from the coal of blowout of coal and gas mouth ejection and the gatherer of gas.
9. coal according to claim 4 and Gas Outburst experimental simulation device, it is characterized in that: the blowout of coal and gas mouth of described coal sampling mill is corresponding to each set multiple spouts that are independent of each other of coal sample die cavity independently on coal sampling mill, described for control the control device of blowout of coal and gas mouth conducting be on coal sampling mill corresponding to the set multiple baffle plates in the position of each spout, be provided with in the position that baffle plate is installed of coal sampling mill for collecting from the coal of nozzle ejection and the gatherer of gas.
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| CN201110021828.1A CN102095835B (en) | 2011-01-19 | 2011-01-19 | Device for simulating coal and gas outburst experiment |
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