CN104569345A - Two-dimensional solid, thermal and gas multi-field coupling physical analogue simulating method - Google Patents
Two-dimensional solid, thermal and gas multi-field coupling physical analogue simulating method Download PDFInfo
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- CN104569345A CN104569345A CN201410852870.1A CN201410852870A CN104569345A CN 104569345 A CN104569345 A CN 104569345A CN 201410852870 A CN201410852870 A CN 201410852870A CN 104569345 A CN104569345 A CN 104569345A
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Abstract
The invention discloses a two-dimensional solid, thermal and gas multi-field coupling physical analogue simulating method. According to the method, the change rules of coal bed overlaying rock layer stress and pressure relief gas seepage velocity along with mining during a coal bed mining process can be determined; the influence of a gas seepage process on the temperature of a coal rock body can also be determined; the influence of the change of the heating temperature of a resistance wire out of a box body on the pressure relief gas seepage velocity in the box body can also be researched; the heating is uniform; the error caused by non-uniform heating is reduced; the measurement accuracy is improved; the influence of water with different contents on the change of the rock layer stress and the pressure relief gas seepage velocity can also be determined.
Description
Technical field
The present invention relates to a kind of analogy method, is specifically related to a kind of two-dimensional solid hot gas multi-scenarios method physical simulation method.
Background technology
Physical simulation experiment is a kind of effective means of research rock pressure [in mine, gas migration, is based on similarity theory, orthodox regression, selects the laboratory procedure of fragility analog material analogue formation, be widely used in the departments such as water conservancy, mining, geology.At present, the most physical simulation experiment of mineral industry relates generally to the rock mass mechanics such as stope, roadway research category, is all that research is enbrittled the phenomenons such as the stressed rear generation elastic-plastic deformation of rock mass of many architectural characteristics, displacement, being caving of fragmentation and sillar, compacting.Research for solid hot gas coupling also mainly concentrates on theoretical analysis and numerical simulation aspect etc.The less of labs physical simulation experiment is coupling in for solid hot gas.The two-dimensional solid hot gas coupling physical that this patent relates to simulates that real platform mainly researches and develops for this problem.
Summary of the invention
For solving the problem, the invention provides two-dimensional solid hot gas multi-scenarios method physical simulation method, can be determined in seam mining process, Strata Overlying The Seam stress and gas pressure relief percolation flow velocity are with the Changing Pattern adopted, also can measure the impact of gas porous flow process on coal and rock temperature, the impact on wherein gas pressure relief percolation flow velocity of the temperature that changes the heating of casing external resistance silk can be studied simultaneously.
For achieving the above object, the technical scheme that the present invention takes is:
Two-dimensional solid hot gas multi-scenarios method physical simulation method, comprises the steps:
S1, get the identical casing of four structures, label A, B, C and D, offer survey pore in casing both sides;
S2, at casing both sides welding ceramics, ceramics to punch, then by resistance wire through aperture, uniform winding, in the outside of casing, lays high precision strain gauge at bottom half;
S3, in casing A, B, C, lay mining coal seam and rock stratum respectively, and lay in casing A, B, C and cover water device and humidity sensor;
S4, to be connected with air compressor, gas-holder, soap bubble flowmeter with the survey pore of wireway by casing A, B, C, and water device will be covered to be connected with water supply installation, humidity sensor is connected with computing machine;
S5, with wire, strain gauge to be connected with 108 road stress Acquisition Instruments and computing machine, in order to the STRESS VARIATION of rock stratum in test experiments process;
S6, man-made recovery's mining coal seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and the change of coal and rock humidity;
S7, in casing D, lay mining coal seam and rock stratum, after mining coal seam and rock stratum dry, be connected with air compressor, gas-holder, soap bubble flowmeter with the survey pore of wireway by casing D, and with wire, resistance wire is connected with thermostat and temperature sensor, be connected with 108 road stress Acquisition Instruments and computing machine by strain gauge, in test coal rock layer, temperature variation and temperature variation are on the impact of wherein gas porous flow speed;
S8, man-made recovery's mining coal seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and coal and rock temperature variation;
S9, employing different angle working seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and coal and rock temperature variation;
S10, the test result of step S5, S6, S8, S9 gained is carried out analysis and summary, thus the liquid thermosetting gas Coupling Rule in research mining active process.
The present invention has following beneficial effect:
Can be determined in seam mining process, Strata Overlying The Seam stress and gas pressure relief percolation flow velocity are with the Changing Pattern adopted, also can measure the impact of gas porous flow process on coal and rock temperature, the impact on wherein gas pressure relief percolation flow velocity of the temperature that changes the heating of casing external resistance silk can be studied simultaneously, homogeneous heating simultaneously, decrease due to uneven brought error of being heated, improve the precision of measurement, the moisture of different content can also be measured on the impact on terrane stress change, gas pressure relief percolation flow velocity simultaneously.
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiments provide a kind of two-dimensional solid hot gas multi-scenarios method physical simulation method, comprise the steps:
S1, get the identical casing of four structures, label A, B, C and D, offer survey pore in casing both sides;
S2, at casing both sides welding ceramics, ceramics to punch, then by resistance wire through aperture, uniform winding, in the outside of casing, lays high precision strain gauge at bottom half;
S3, in casing A, B, C, lay mining coal seam and rock stratum respectively, and lay in casing A, B, C and cover water device and humidity sensor;
S4, to be connected with air compressor, gas-holder, soap bubble flowmeter with the survey pore of wireway by casing A, B, C, and water device will be covered to be connected with water supply installation, humidity sensor is connected with computing machine;
S5, with wire, strain gauge to be connected with 108 road stress Acquisition Instruments and computing machine, in order to the STRESS VARIATION of rock stratum in test experiments process;
S6, man-made recovery's mining coal seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and the change of coal and rock humidity;
S7, in casing D, lay mining coal seam and rock stratum, after mining coal seam and rock stratum dry, be connected with air compressor, gas-holder, soap bubble flowmeter with the survey pore of wireway by casing D, and with wire, resistance wire is connected with thermostat and temperature sensor, be connected with 108 road stress Acquisition Instruments and computing machine by strain gauge, in test coal rock layer, temperature variation and temperature variation are on the impact of wherein gas porous flow speed;
S8, man-made recovery's mining coal seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and coal and rock temperature variation;
S9, employing different angle working seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and coal and rock temperature variation;
S10, the test result of step S5, S6, S8, S9 gained is carried out analysis and summary, thus the liquid thermosetting gas Coupling Rule in research mining active process.
Embodiment
A kind of two-dimensional solid hot gas multi-scenarios method physical simulation method, comprises the steps:
S11, offer survey pore in casing both sides, in casing, lay mining coal seam and rock stratum, the thickness of mining coal seam and rock stratum is 1 meter, and lays silicon carbide heating rod in mining coal seam, lays high precision strain gauge at bottom half;
S12, after mining coal seam and rock stratum dry, with wireway, survey pore is connected with air compressor, gas-holder, soap bubble flowmeter, and with wire, constant temperature silicon carbide heating rod is connected with thermostat and temperature sensor, control constant temperature silicon carbide heating rod by temperature controller to heat mining coal seam, mining coal seam temperature is made to reach 25 DEG C, 30 DEG C, 50 DEG C, 80 DEG C respectively, to test the impact on wherein gas porous flow speed of temperature variation and temperature variation in coal rock layer;
S13, with wire, strain gauge to be connected with 108 road stress Acquisition Instruments and computing machine, man-made recovery's mining coal seam, by working seam with advance of the face process, by strain gauge and 108 road stress Acquisition Instruments terrane stress changed and test, by surveying pore and air compressor, gas-holder, soap bubble flowmeter are tested gas pressure relief percolation flow velocity and coal and rock temperature variation;
S14, the test of step S2, S3 gained met and carried out analysis and summary, thus the thermosetting gas Coupling Rule in research mining active process.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. two-dimensional solid hot gas multi-scenarios method physical simulation method, is characterized in that, comprise the steps:
S1, get the identical casing of four structures, label A, B, C and D, offer survey pore in casing both sides;
S2, at casing both sides welding ceramics, ceramics to punch, then by resistance wire through aperture, uniform winding, in the outside of casing, lays high precision strain gauge at bottom half;
S3, in casing A, B, C, lay mining coal seam and rock stratum respectively, and lay in casing A, B, C and cover water device and humidity sensor;
S4, to be connected with air compressor, gas-holder, soap bubble flowmeter with the survey pore of wireway by casing A, B, C, and water device will be covered to be connected with water supply installation, humidity sensor is connected with computing machine;
S5, with wire, strain gauge to be connected with 108 road stress Acquisition Instruments and computing machine, in order to the STRESS VARIATION of rock stratum in test experiments process;
S6, man-made recovery's mining coal seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and the change of coal and rock humidity;
S7, in casing D, lay mining coal seam and rock stratum, after mining coal seam and rock stratum dry, be connected with air compressor, gas-holder, soap bubble flowmeter with the survey pore of wireway by casing D, and with wire, resistance wire is connected with thermostat and temperature sensor, be connected with 108 road stress Acquisition Instruments and computing machine by strain gauge, in test coal rock layer, temperature variation and temperature variation are on the impact of wherein gas porous flow speed;
S8, man-made recovery's mining coal seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and coal and rock temperature variation;
S9, employing different angle working seam, by working seam with advance of the face process, test terrane stress change, gas pressure relief percolation flow velocity and coal and rock temperature variation;
S10, the test result of step S5, S6, S8, S9 gained is carried out analysis and summary, thus the liquid thermosetting gas Coupling Rule in research mining active process.
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