CN103884604A - Multifunctional high-temperature and high-pressure three-axis coal rock testing device and method - Google Patents
Multifunctional high-temperature and high-pressure three-axis coal rock testing device and method Download PDFInfo
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- CN103884604A CN103884604A CN201410138432.9A CN201410138432A CN103884604A CN 103884604 A CN103884604 A CN 103884604A CN 201410138432 A CN201410138432 A CN 201410138432A CN 103884604 A CN103884604 A CN 103884604A
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Abstract
The invention discloses a multifunctional high-temperature and high-pressure three-axis coal rock testing device and a multifunctional high-temperature and high-pressure three-axis coal rock testing method. The device comprises a loading system, a temperature control heating device, a sound emission measurement system, a gas sampling system, an insulating and sealing structure and a cooling system. According to the multifunctional high-temperature and high-pressure three-axis coal rock testing device and the method, the surface temperature, an axial load, axial stress and a sound emission signal of a three-axis coal rock test sample can be measured under the high-temperature and high-pressure effects simultaneously in real time, and a phase-change gas product of the coal rock test sample under the high temperature and the high pressure can be collected in real time; effective experiment equipment and effective evidences are provided for researching deformation characteristics, crack initiation, and an expanding and cracking principle of the three-axis coal rock under the high temperature and the high pressure, and the generation amount of phase-change gas of the coal rock; meanwhile, an influence principle on the deformation characteristics, the crack initiation, and the expanding and cracking characteristics of the coal rock by the temperature, the axial pressure and the confining pressure can also be considered so as to explore the influence principle on the generation amount of the phase-change gas of the coal rock by the temperature, the axial pressure, the confining pressure and the coal rock deformation; the effective experiment equipment is provided for quantitatively characterizing the mechanical properties and the physicochemical properties of the three-axis coal rock under the high temperature and the high pressure.
Description
Technical field
The present invention relates to a kind of multifunctional high-temperature high pressure three axle coal petrography test unit and methods, in order to deformation characteristic, the crack initiation and propagation rule of three axle coal petrographys under researching high-temperature high pressure, also have the phase transformation of coal petrography gas generated and with the rule that is related to of coal rock deformation.
Background technology
The mankind to deep resource energy development processes such as deep mining, coal-bed gas exploitation, geothermal energy resources exploitation, the underground liquefaction of coal and gasification and Deep Oil-gas exploitations in, in the urgent need to the characteristic of rock mass under the effect of exploration High Temperature High Pressure.In progress of coal mining, coal is a kind of to all very responsive organolites of temperature, pressure and tectonic stress, under High Temperature High Pressure effect, the γ-ray emission that deformation characteristic, fracture characteristics and the coal distortion of coal occurs and protrusion phenomenon affect the safety of coal mining, such as, in process of coal mining, often there is the roof fall phenomenon and the gas burst accident that cause because of Rock Masses Fractures, be caving etc.Therefore, the stressed condition of three axles of simulation earth's crust deep rock, a kind of multifunctional high-temperature high pressure three axle coal petrography test unit and methods are provided, disclose the pyrolytic reaction of deformation characteristic, crack initiation and propagation rule and the coal petrography of coal petrography under High Temperature High Pressure, coal field geology and mine gas prediction are had to important theory directive significance with control.
At present, conventional High Temperature High Pressure coal petrography test unit and method have: the patent No. is disclosed a kind of High Temperature High Pressure Triaxial tester and method containing organic rock mass of CN201110267767, the only pyrolysis product of the organic rock mass of bulk under researching high-temperature high pressure; The patent No. is the disclosed a kind of moulded coal High Temperature High Pressure gasification property evaluating apparatus of CN201320138995, investigate temperature of reaction, vapor pressure, vaporized chemical flow on type coal gasification after the impact of gas composition, tar yield, gasification reaction, flying dust carry-over, lime-ash state etc., can only High Temperature High Pressure mo(u)ld bottom half coal gasification characteristic be evaluated; Number of patent application is that the disclosed one of CN201310121184 is covered and pressed the lower coal petrography hole of heating to ooze electroacoustic ess-strain translocation device, factor of porosity, Gas And Water Relative Permeability, stress-strain diagram, resistivity and the acoustic velocity of coal petrography sample under the three axle effects of researching high-temperature high pressure, do not inquire into fracture characteristics and the pyrolytic reaction of coal petrography sample; Number of patent application is test unit and the method for CN201310220946 and the disclosed a kind of High Temperature High Pressure pyrolytic reaction of CN201310220947, and Triaxial tester and the method for resinous shale and low-disintegration coal pyrolytic reaction under researching high-temperature high pressure is only provided.But in experimentation, deformation characteristic, crack initiation, expansion and the Fracture of researching high-temperature Coal Under High Pressure rock and multifunctional high-temperature high pressure three axle coal petrography test units and the method for coal petrography pyrolytic reaction also do not have simultaneously.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of multifunctional high-temperature high pressure three axle coal petrography test unit and methods, that one is multiple functional, method is easy, easy-operating High Temperature High Pressure three axle coal petrography test unit and methods, can be in order to the deformation characteristic of researching high-temperature Coal Under High Pressure rock, crack initiation and propagation rule, also have the phase transformation of coal petrography gas generated and with the rule that is related to of coal rock deformation.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of multifunctional high-temperature high pressure three axle coal petrography test units, comprise loading system, temperature control heating system, acoustic emission system, gas sampling system, insulation and hermetically-sealed construction and cooling system:
Described loading system comprises pedestal, lower loading unit, confined pressure loading unit and upper loading unit;
Described pedestal comprises base, be symmetricly set on two support posts on base, be horizontally fixed on two support post bottoms support, be horizontally fixed on the carrier bar on two support post tops; Described mid-stent offers through hole;
Described lower loading unit comprises with the hydraulic elevator platform of displacement transducer, be arranged on lower compression dish on hydraulic elevator platform, be arranged on loading blocks on lower compression dish, be arranged in loading blocks T-shaped, be arranged on the push-down head on T-shaped, described hydraulic elevator platform is arranged on the middle part of base, and the upper surface of described loading blocks is provided with the suitable location structure in the lower end large with T-shaped;
Described confined pressure loading unit comprises cylindrical shell, be arranged on the circular disk of inner barrel lower end, be arranged on circular disk upper end A pyrophyllite bisque, be arranged on A pyrophyllite bisque upper end salt ring, be arranged on salt ring upper end B pyrophyllite bisque, be arranged on the ring screw cover of B pyrophyllite bisque upper end, coal petrography sample is arranged in cylindrical shell;
Described upper loading unit comprises seaming chuck, be arranged on A cylinder briquetting on seaming chuck, be arranged on convex piece on A cylinder briquetting, with the suitable gland of convex piece, be arranged on B intermediate pressing block on convex piece, be arranged on the upper compact disk on B intermediate pressing block;
The outer cross section of the outer cross section of described circular disk, the outer cross section of A leaf paraffin bisque, salt ring is identical with the interior cross sectional shape of cylindrical shell corresponding position with the outer cross section of B leaf paraffin bisque, the interior cross sectional shape of the interior cross section of the xsect of the xsect of the shape of through holes of mid-stent, the xsect of T-shaped little upper end, push-down head, the xsect of coal petrography sample, seaming chuck, the interior cross section of circular disk, A leaf paraffin bisque, the interior cross section of salt ring, B leaf paraffin bisque is identical, described T-shaped little upper end passed the through hole of mid-stent successively, the through hole at the through hole at circular disk middle part and A leaf paraffin bisque middle part, described push-down head, coal petrography sample, seaming chuck and A cylinder briquetting overlay on the small end face of T-shaped from the bottom to top successively, and be placed in the A leaf paraffin bisque stacking successively from the bottom to top, salt ring, in B leaf paraffin bisque and the common passage forming of ring screw cover, described coal petrography sample comprises coal petrography and the coal petrography combination set of parcel around at middle part, described combination set is followed successively by sheet copper from the inside to the outside, micarex, electric resistance alloy sheet and micarex, wherein the upper and lower two ends of electric resistance alloy sheet contact with push-down head with seaming chuck respectively, described A leaf paraffin bisque, salt ring, B leaf paraffin bisque and A cylinder briquetting are placed in cylindrical shell, and described ring screw cover is outside to be threaded connection with cylindrical shell upper end, lower end and the support of described cylindrical shell are fixed, and the large lower end of described convex piece covers the upper port of cylindrical shell, and is fixed on cylindrical shell by gland, and described upper compact disk and carrier bar are fixed, on described carrier bar, be provided with tension-compression sensor,
Described temperature control heating system comprises electric resistance alloy sheet, salt ring in heating electrode plates, combination set, is arranged on the thermocouple needle in salt ring, intelligent temperature controller and bidirectional triode thyristor; Described heating electrode plates is placed between loading blocks and lower compression dish, and contacts with loading blocks bottom surface, and is separated with heat resistance insulating sheet between lower compression dish; The output signal of described thermocouple needle accesses intelligent temperature controller, and the bidirectional triode thyristor on described intelligent temperature controller is controlled heating electrode plates;
Described acoustic emission system comprises the calibrate AE sensor that is arranged on loading blocks side;
Described gas sampling system comprises high temperature resistant stainless steel pipe, gas sampler, be arranged on the gas sampling bag on gas sampler, described high temperature resistant stainless steel pipe is arranged on gland, the gas that under High Temperature High Pressure effect, coal petrography phase transformation produces is successively by the through hole on seaming chuck, gap between seaming chuck and A cylinder briquetting surface of contact, the through hole at A cylinder briquetting middle part, the large end face radial hole of convex piece being connected with the through hole at A cylinder briquetting middle part, gap between convex piece and gland surface of contact, through hole on gland and entering in high temperature resistant stainless steel pipe, and led to gas sampler,
Described insulation and hermetically-sealed construction comprise the A micarex being arranged between convex piece and B intermediate pressing block, be arranged on the heat resistance insulating sheet between lower compression dish and heating electrode plates, be arranged on the A red copper pad between convex piece and gland step surface, be arranged on the B red copper pad between gland and cylindrical shell surface of contact, be arranged on the C red copper pad between T-shaped and push-down head surface of contact, be arranged on the D red copper pad between support and cylindrical shell surface of contact, be arranged on the high temperature high voltage resistant YX RunddichtringO between support and T-shaped,
Described cooling system comprises the A cooling water pipe that is wrapped in high temperature resistant stainless steel pipe outside and the B cooling water pipe that is wrapped in cylindrical shell outside.
Preferably, the lower end of described cylindrical shell is fixed by A sunk screw and support, and described gland is fixed by B sunk screw and cylindrical shell, all scribbles high-temperature insulation glue at the head of convex piece and gland step surface engagement edge, A sunk screw and B sunk screw.
Preferably, described hydraulic elevator platform is the hydraulic elevator platform of WEW-600 microcomputer control screen display universal testing machine.
A kind of multifunctional high-temperature high pressure three axle coal petrography test methods, comprise the steps:
(1) support is arranged on two support posts, T-shaped is passed the support that high temperature high voltage resistant YX RunddichtringO is installed, and T-shaped large lower end is placed in loading blocks and by location structure and locates; Described loading blocks is placed on lower compression dish, between loading blocks and lower compression dish, heating electrode plates and heat resistance insulating sheet is set; Calibrate AE sensor is placed in to the side of loading blocks;
(2) circular disk is enclosed within on T-shaped, C red copper pad and push-down head are positioned on T-shaped successively, by A sunk screw, cylindrical shell is fixed on support, the head of described A sunk screw all scribbles high-temperature insulation glue, is lined with D red copper pad between cylindrical shell and support; A leaf paraffin powder is put into the annular gap between cylindrical shell and push-down head; Coal petrography sample is positioned on push-down head, then salt is put into the annular gap between cylindrical shell and coal petrography sample, and thermocouple needle is imbedded to salt ring, by the compacting of salt ring and draw the wire of thermocouple needle; Seaming chuck is positioned on coal petrography sample, then B leaf paraffin powder is put into the annular gap between cylindrical shell and seaming chuck; By dial torque wrench, ring screw cover is screwed in to cylindrical shell, until compression B pyrophyllite bisque is to certain depth, presets the large I of coal petrography confined pressure and calculate by moment of torsion conversion, then A cylinder briquetting is put into ring screw cover endoporus;
(3) convex piece is placed in cylindrical shell upper end, gland is enclosed within on convex piece, and is fixed on cylindrical shell by B sunk screw, and the head of described B sunk screw all scribbles high-temperature insulation glue; A red copper pad is set between convex piece and gland step surface, B red copper pad is set between cylindrical shell and gland surface of contact, between convex piece and B intermediate pressing block, A micarex is set;
(4) wire of drawing of thermocouple needle is connected on intelligent temperature controller, by the size of electric current in bidirectional triode thyristor control heating electrode plates; The gas that coal petrography phase transformation under High Temperature High Pressure effect is produced is drawn by high temperature resistant stainless steel pipe, via gas sampler and gas sampling bag collection; In the outer felt of cylindrical shell around B cooling water pipe, in the outer felt of high temperature resistant stainless steel pipe around A cooling water pipe;
(5) move lower compression dish by hydraulic elevator platform, make coal petrography sample be depressed into initial setting axial load, coal rock deformation amount and axial load value size are respectively by displacement transducer and tension-compression sensor record;
(6) by temperature control heating system, coal petrography sample is heated, in the time reaching design temperature, the insulation of coal petrography sample, increases coal petrography sample axial load to different set axial load value, in the time reaching maximum setting shaft to load value, stops experiment; Measure the acoustic emission signal in coal petrography sample compression process by calibrate AE sensor, use under gas sampling system acquisition certain predetermined confined pressure coal petrography sample phase-change product corresponding when disalignment is to load value.
Beneficial effect: multifunctional high-temperature high pressure three axle coal petrography test unit and methods provided by the invention, compared to existing technology, can measure in real time the phase transformation gaseous product of coal petrography sample under environment temperature, axial load, axial strain, acoustic emission signal and the Real-time Collection High Temperature High Pressure of coal petrography sample under High Temperature High Pressure effect simultaneously, deformation characteristic, crack initiation, expansion and Fracture to researching high-temperature Coal Under High Pressure rock, gas generated effective experimental facilities and the effective foundation of providing of phase transformation of coal petrography; Can investigate temperature, confined pressure and the axle pressure rule that affects on coal rock deformation characteristic, crack initiation, expansion and fracture characteristics simultaneously, explore temperature, confined pressure, axle pressure and coal rock deformation on coal petrography phase transformation gas generated affect rule, this provides effective experimental assembly to coal petrography mechanical characteristic and physical and chemical performance under quantitatively characterizing High Temperature High Pressure; It is simple in structure, easy and simple to handle, multiple functional, effective, has in the art practicality widely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1-support post, 2-carrier bar, 3-B intermediate pressing block, the upper compact disk of 4-, 5-high temperature resistant stainless steel pipe, 6-A red copper pad, 7-A cooling water pipe, 8-B red copper pad, 9-A cylinder briquetting, 10-B cooling water pipe, 11-salt ring, 12-combination set (sheet copper, micarex, electric resistance alloy sheet, micarex), 13-gas sampler, 14-gas sampling bag, 15-support, 16-D red copper pad, 17-A sunk screw, 18-heating electrode plates, 19-heat resistance insulating sheet, 20-loading blocks, 21-base, 22-hydraulic elevator platform, 23-lower compression dish, 24-T type piece, 25-calibrate AE sensor, 26-high temperature high voltage resistant YX RunddichtringO, 27-circular disk, 28-C red copper pad, 29-A pyrophyllite bisque, 30-push-down head, 31-cylindrical shell, 32-thermocouple needle, 33-coal petrography sample, 34-B pyrophyllite bisque, 35-seaming chuck, 36-ring screw cover, 37-B sunk screw, 38-gland, 39-convex piece, 40-A micarex, the intelligent temperature controller of 41-, 42-bidirectional triode thyristor.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Be illustrated in figure 1 a kind of multifunctional high-temperature high pressure three axle coal petrography test units, comprise loading system, temperature control heating system, acoustic emission system, gas sampling system, insulation and hermetically-sealed construction and cooling system.
Described loading system comprises pedestal, lower loading unit, confined pressure loading unit and upper loading unit.
Described pedestal comprises base 21, be symmetricly set on two support posts 1 on base 21, be horizontally fixed on two support post 1 bottoms support 15, be horizontally fixed on the carrier bar 2 on two support post 1 tops; Described support 15 middle parts offer through hole.
Described lower loading unit comprises with the hydraulic elevator platform 22 of the WEW-600 microcomputer control screen display universal testing machine (maximum compression 600kN) of displacement transducer, be arranged on lower compression dish 23 on hydraulic elevator platform 22, be arranged on loading blocks 20 in lower compression 23, be arranged in loading blocks 20 T-shaped 24, be arranged on the push-down head 30 on T-shaped 24, described hydraulic elevator platform 22 is arranged on the middle part at the end 21, and the upper surface of described loading blocks 20 is provided with and the T-shaped location structure that 24 large lower ends are suitable.
The features such as the A pyrophyllite bisque 29(pyrophyllite in powder that described confined pressure loading unit comprises cylindrical shell 31, be arranged on the circular disk 27 of cylindrical shell 31 interior lower end, be arranged on circular disk 27 upper ends has that chemical inertness, fusing point are high, high temperature high voltage resistant and biography temperature, pressure transmission homogeneity), be arranged on A pyrophyllite bisque 29 upper ends salt ring 11, be arranged on salt ring 11 upper ends B pyrophyllite bisque 34, be arranged on the ring screw cover 36 of B pyrophyllite bisque 34 upper ends, coal petrography sample 33 is arranged in cylindrical shell 31.
Described upper loading unit comprises seaming chuck 35, be arranged on A cylinder briquetting 9 on seaming chuck 35, be arranged on convex piece 39 on A cylinder briquetting 9, with the suitable gland 38 of convex piece 39, be arranged on B intermediate pressing block 3 on convex piece 39, be arranged on the upper compact disk 4 on B intermediate pressing block 3.
The outer cross section of the outer cross section of described circular disk 27, the outer cross section of A leaf paraffin bisque 29, salt ring 11 is identical with the interior cross sectional shape of cylindrical shell 31 corresponding positions with the outer cross section of B leaf paraffin bisque 34, the interior cross section of the interior cross section of the xsect of the xsect of the upper end that the shape of through holes at support 15 middle parts, T-shaped 24 is little, the xsect of push-down head 30, coal petrography sample 33, the xsect of seaming chuck 35, circular disk 27, the interior cross section of A leaf paraffin bisque 29, salt ring 11, the interior cross sectional shape of B leaf paraffin bisque 34 are identical, described T-shaped 24 little upper ends are passed the through hole at support 15 middle parts successively, the through hole at the through hole at circular disk 27 middle parts and A leaf paraffin bisque 29 middle parts, described push-down head 30, coal petrography sample 33, seaming chuck 35 and A cylinder briquetting overlay on the small end face of T-shaped 24 from the bottom to top successively, and be placed in the A leaf paraffin bisque 29 stacking successively from the bottom to top, salt ring 11, in B leaf paraffin bisque 34 and the common passage forming of ring screw cover 36, described coal petrography sample 33 comprises coal petrography and the coal petrography combination set 12 of parcel around at middle part, described combination set 12 is followed successively by sheet copper from the inside to the outside, micarex (800 ℃ of maximum operating temperatures), electric resistance alloy sheet and micarex, guarantee the insulation between electric resistance alloy sheet and sheet copper, wherein the upper and lower two ends of electric resistance alloy sheet contact with push-down head 30 with seaming chuck 35 respectively, described A leaf paraffin bisque 29, salt ring 11, B leaf paraffin bisque 34 and A cylinder briquetting 9 are placed in cylindrical shell 31, and described ring screw cover 36 is outside to be threaded connection with cylindrical shell 31 upper ends, the lower end of described cylindrical shell 31 and support 15 are fixing, and the large lower end of described convex piece 39 covers the upper port of cylindrical shell 31, and is fixed on cylindrical shell 31 by gland 38, and described upper compact disk 4 is fixing with carrier bar 2, described cylindrical shell 31 is thick cyclinder shape, adopts thermoplastic mould steel (H13) processing and fabricating, and this steel phase transition temperature is 800 ℃, on described carrier bar 2, be provided with tension-compression sensor, described tension-compression sensor is for measuring axial load and the coal rock deformation amount that compression process coal petrography bears.
Described temperature control heating system comprises electric resistance alloy sheet, salt ring 11 in heating electrode plates 18, combination set 12, is arranged on thermocouple needle 32, intelligent temperature controller 41 and bidirectional triode thyristor 42 in salt ring 11; Described heating electrode plates 18 is placed between loading blocks 20 and lower compression dish 23, and contacts with loading blocks 20 bottom surfaces, and is separated with heat resistance insulating sheet 19 between lower compression dish 23; The output signal of described thermocouple needle 32 accesses intelligent temperature controller 41, and the bidirectional triode thyristor 42 on described intelligent temperature controller 41 is controlled heating electrode plates 18.
Described acoustic emission system comprises the calibrate AE sensor 25 that is arranged on loading blocks 20 sides, between loading blocks 20 sides and calibrate AE sensor 25, scribbles couplant.
Described gas sampling system comprises high temperature resistant stainless steel pipe 5, gas sampler 13, be arranged on the gas sampling bag 14 on gas sampler, described high temperature resistant stainless steel pipe 5 is arranged on gland 38, the gas that under High Temperature High Pressure effect, coal petrography phase transformation produces is successively by the through hole on seaming chuck 35, gap between seaming chuck 35 and A cylinder briquetting 9 surface of contact, the through hole at A cylinder briquetting 9 middle parts, the large end face radial hole of convex piece 39 being connected with the through hole at A cylinder briquetting 9 middle parts, gap between convex piece 39 and gland 38 surface of contact, through hole on gland 38 and entering in high temperature resistant stainless steel pipe 5, and led to gas sampler 13.
Described insulation and hermetically-sealed construction comprise the A micarex 40 being arranged between convex piece 39 and B intermediate pressing block 3, be arranged on the heat resistance insulating sheet 19 between lower compression dish 23 and heating electrode plates 18, be arranged on the A red copper pad 6 between convex piece 39 and gland 38 step surfaces, be arranged on the B red copper pad 8 between gland 38 and cylindrical shell 31 surface of contact, be arranged on the C red copper pad 28 between T-shaped 24 and push-down head 30 surface of contact, be arranged on the D red copper pad 16 between support 15 and cylindrical shell 31 surface of contact, be arranged on the high temperature high voltage resistant YX RunddichtringO 26 between support 15 and T-shaped 24, wherein micarex and heat resistance insulating sheet 19 play insulating effect, and red copper pad and O-ring seal play sealing function, in order to prevent that coal petrography under High Temperature High Pressure effect from undergoing phase transition the gaseous product free diffusing of generation.
Described cooling system comprises the A cooling water pipe 6 that is wrapped in high temperature resistant stainless steel pipe 5 outsides and the B cooling water pipe 8 that is wrapped in cylindrical shell 25 outsides.
A kind of multifunctional high-temperature high pressure single shaft coal petrography test method, comprises the steps:
(1) support 15 is arranged on two support posts 1, T-shaped 24 is passed the support 15 that high temperature high voltage resistant YX RunddichtringO is installed, and T-shaped 24 large lower ends are placed in loading blocks 20 and by location structure and locate; Described loading blocks 20 is placed on lower compression dish 23, and heating electrode plates 18 and heat resistance insulating sheet 19 are set between loading blocks 20 and lower compression dish 23; Calibrate AE sensor 25 is placed in to the side of loading blocks 20;
(2) circular disk 27 is enclosed within on T-shaped 24, C red copper pad 28 and push-down head 30 are positioned on T-shaped 24 successively, by A sunk screw 17, cylindrical shell 31 is fixed on support 15, the head of described A sunk screw 17 all scribbles high-temperature insulation glue, is lined with D red copper pad 16 between cylindrical shell 31 and support 15; The annular gap that A leaf paraffin powder 29 is put between cylindrical shell 31 and push-down head 30; Coal petrography sample 33 is positioned on push-down head 30, then salt 11 is put into the annular gap between cylindrical shell 31 and coal petrography sample 33, and thermocouple needle 32 is imbedded to salt ring 11, by salt ring, 11 compactings are also drawn the wire of thermocouple needle 32; Seaming chuck 35 is positioned on coal petrography sample 33 to the annular gap of then B leaf paraffin powder 34 being put between cylindrical shell 31 and seaming chuck 35; By dial torque wrench, ring screw cover 36 is screwed in to cylindrical shell 31, until compression B pyrophyllite bisque 34 is to certain decrement (0～10mm), the default large I of coal petrography confined pressure calculates by moment of torsion conversion, then A cylinder briquetting 9 is put into ring screw and overlaps 36 endoporus;
(3) convex piece 39 is placed in cylindrical shell 31 upper end, gland 38 is enclosed within on convex piece 39, and is fixed on cylindrical shell 31 by B sunk screw 37, and the head of described B sunk screw 37 all scribbles high-temperature insulation glue; Between convex piece 39 and gland 38 step surfaces, A red copper pad 6 is set, between cylindrical shell 31 and gland 38 surface of contact, B red copper pad 8 is set, between convex piece 39 and B intermediate pressing block 3, A micarex 40 is set;
(4) wire of drawing of thermocouple needle 32 is connected on intelligent temperature controller 41, controls the size of electric current in heating electrode plates 18 by bidirectional triode thyristor 42; The gas that coal petrography phase transformation under High Temperature High Pressure effect is produced is drawn by high temperature resistant stainless steel pipe 5, gathers via gas sampler 13 and gas sampling bag 14; In the outer felt of cylindrical shell 31 around B cooling water pipe 10, in the outer felt of high temperature resistant stainless steel pipe 5 around A cooling water pipe 7;
(5) move lower compression dish 23 by hydraulic elevator platform 22, make coal petrography sample 33 be depressed into initial setting axial load, coal rock deformation amount and axial load value size are respectively by displacement transducer and tension-compression sensor record;
(6) by temperature control heating system to coal petrography sample 33 heat (rate of heat addition be 10 ℃/h), (normal temperature in the time reaching design temperature; 50 ℃-600 ℃, 50 ℃, interval), coal petrography sample 33 is incubated, and increases coal petrography sample axial load (axial load increment is 20KN) to different set axial load value, in the time reaching maximum setting shaft to load value, stops experiment; Measure the acoustic emission signal in coal petrography sample 33 compression processes by calibrate AE sensor 25, use under gas sampling system acquisition certain predetermined confined pressure coal petrography sample 33 phase-change products corresponding when disalignment is to load value.
The above is only the preferred embodiment of the present invention; be noted 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 (4)
1. multifunctional high-temperature high pressure three axle coal petrography test units, is characterized in that: comprise loading system, temperature control heating system, acoustic emission system, gas sampling system, insulation and hermetically-sealed construction and cooling system:
Described loading system comprises pedestal, lower loading unit, confined pressure loading unit and upper loading unit;
Described pedestal comprises base (21), be symmetricly set on two support posts (1) on base (21), be horizontally fixed on two support posts (1) bottom support (15), be horizontally fixed on the carrier bar (2) on two support posts (1) top; Described support (15) middle part offers through hole;
Described lower loading unit comprises hydraulic elevator platform (22) with displacement transducer, be arranged on lower compression dish (23) on hydraulic elevator platform (22), be arranged on loading blocks (20) on lower compression dish (23), be arranged on T-shaped (24) in loading blocks (20), be arranged on T-shaped push-down head (30) on (24), described hydraulic elevator platform (22) is arranged on the middle part of base (21), and the upper surface of described loading blocks (20) is provided with the suitable location structure in the lower end large with T-shaped (24);
Described confined pressure loading unit comprises cylindrical shell (31), be arranged on the circular disk (27) of cylindrical shell (31) interior lower end, be arranged on circular disk (27) upper end A pyrophyllite bisque (29), be arranged on A pyrophyllite bisque (29) upper end salt ring (11), be arranged on salt ring (11) upper end B pyrophyllite bisque (34), be arranged on the ring screw cover (36) of B pyrophyllite bisque (34) upper end, coal petrography sample (33) is arranged in cylindrical shell (31);
Described upper loading unit comprises seaming chuck (35), be arranged on A cylinder briquetting (9) on seaming chuck (35), be arranged on convex piece (39) on A cylinder briquetting (9), with the suitable gland (38) of convex piece (39), be arranged on B intermediate pressing block (3) on convex piece (39), be arranged on the upper compact disk (4) on B intermediate pressing block (3);
The outer cross section of described circular disk (27), the outer cross section of A leaf paraffin bisque (29), the outer cross section of salt ring (11) and the outer cross section of B leaf paraffin bisque (34) are identical with the interior cross sectional shape of cylindrical shell (31) corresponding position, the interior cross section of the interior cross section of the xsect of the xsect of the little upper end in shape of through holes, T-shaped (24) at support (15) middle part, the xsect of push-down head (30), coal petrography sample (33), the xsect of seaming chuck (35), circular disk (27), the interior cross section of A leaf paraffin bisque (29), salt ring (11), the interior cross sectional shape of B leaf paraffin bisque (34) are identical, described T-shaped (24) little upper end is passed the through hole at support (15) middle part successively, the through hole at the through hole at circular disk (27) middle part and A leaf paraffin bisque (29) middle part, described push-down head (30), coal petrography sample (33), seaming chuck (35) and A cylinder briquetting overlay on the small end face of T-shaped (24) from the bottom to top successively, and be placed in the A leaf paraffin bisque (29) stacking successively from the bottom to top, salt ring (11), in the common passage forming of B leaf paraffin bisque (34) and ring screw cover (36), described coal petrography sample (33) comprises coal petrography and the coal petrography combination set (12) of parcel around at middle part, described combination set (12) is followed successively by sheet copper from the inside to the outside, micarex, electric resistance alloy sheet and micarex, wherein the upper and lower two ends of electric resistance alloy sheet contact with push-down head (30) with seaming chuck (35) respectively, described A leaf paraffin bisque (29), salt ring (11), B leaf paraffin bisque (34) and A cylinder briquetting (9) are placed in cylindrical shell (31), and described ring screw cover (36) is outside to be threaded connection with cylindrical shell (31) upper end, the lower end of described cylindrical shell (31) and support (15) are fixing, and the large lower end of described convex piece (39) covers the upper port of cylindrical shell (31), and it is upper to be fixed on cylindrical shell (31) by gland (38), and described upper compact disk (4) is fixing with carrier bar (2), described carrier bar is provided with tension-compression sensor on (2),
Described temperature control heating system comprises electric resistance alloy sheet, salt ring (11) in heating electrode plates (18), combination set (12), is arranged on thermocouple needle (32), intelligent temperature controller (41) and bidirectional triode thyristor (42) in salt ring (11); Described heating electrode plates (18) is placed between loading blocks (20) and lower compression dish (23), and contacts with loading blocks (20) bottom surface, and is separated with heat resistance insulating sheet (19) between lower compression dish (23); The output signal of described thermocouple needle (32) accesses intelligent temperature controller (41), and the bidirectional triode thyristor (42) on described intelligent temperature controller (41) is controlled heating electrode plates (18);
Described acoustic emission system comprises the calibrate AE sensor (25) that is arranged on loading blocks (20) side;
Described gas sampling system comprises high temperature resistant stainless steel pipe (5), gas sampler (13), be arranged on the gas sampling bag (14) on gas sampler, described high temperature resistant stainless steel pipe (5) is arranged on gland (38), the gas that under High Temperature High Pressure effect, coal petrography phase transformation produces is successively by the through hole on seaming chuck (35), gap between seaming chuck (35) and A cylinder briquetting (9) surface of contact, the through hole at A cylinder briquetting (9) middle part, the large end face radial hole of convex piece (39) being connected with the through hole at A cylinder briquetting (9) middle part, gap between convex piece (39) and gland (38) surface of contact, through hole on gland (38) and entering in high temperature resistant stainless steel pipe (5), and led to gas sampler (13),
Described insulation and hermetically-sealed construction comprise the A micarex (40) being arranged between convex piece (39) and B intermediate pressing block (3), be arranged on the heat resistance insulating sheet (19) between lower compression dish (23) and heating electrode plates (18), be arranged on the A red copper pad (6) between convex piece (39) and gland (38) step surface, be arranged on the B red copper pad (8) between gland (38) and cylindrical shell (31) surface of contact, be arranged on the C red copper pad (28) between T-shaped (24) and push-down head (30) surface of contact, be arranged on the D red copper pad (16) between support (15) and cylindrical shell (31) surface of contact, be arranged on the high temperature high voltage resistant YX RunddichtringO (26) between support (15) and T-shaped (24),
Described cooling system comprises the A cooling water pipe (7) that is wrapped in high temperature resistant stainless steel pipe (5) outside and the B cooling water pipe (10) that is wrapped in cylindrical shell (31) outside.
2. multifunctional high-temperature high pressure three axle coal petrography test units according to claim 1, it is characterized in that: the lower end of described cylindrical shell (31) is fixing by A sunk screw (17) and support (15), described gland (38) is fixing by B sunk screw (36) and cylindrical shell (31), all scribbles high-temperature insulation glue at the head of convex piece (39) and gland (38) step surface engagement edge, A sunk screw (17) and B sunk screw (36).
3. multifunctional high-temperature high pressure three axle coal petrography test units according to claim 1, is characterized in that: described hydraulic elevator platform is the hydraulic elevator platform of WEW-600 microcomputer control screen display universal testing machine.
4. multifunctional high-temperature high pressure three axle coal petrography test methods, is characterized in that: comprise the steps:
(1) support (15) is arranged on to two support posts (1) above, T-shaped (24), through the support (15) that high temperature high voltage resistant YX RunddichtringO is installed, T-shaped (24) large lower end is placed in loading blocks (20) above and locates by location structure; It is upper that described loading blocks (20) is placed in lower compression dish (23), and heating electrode plates (18) and heat resistance insulating sheet (19) are set between loading blocks (20) and lower compression dish (23); Calibrate AE sensor (25) is placed in to the side of loading blocks (20);
(2) circular disk (27) is enclosed within on T-shaped (24), C red copper pad (28) and push-down head (30) are positioned on T-shaped (24) successively, by A sunk screw (17), cylindrical shell (31) is fixed on support (15), the head of described A sunk screw (17) all scribbles high-temperature insulation glue, between cylindrical shell (31) and support (15), is lined with D red copper pad (16); A leaf paraffin powder (29) is put into the annular gap between cylindrical shell (31) and push-down head (30); Coal petrography sample (33) is positioned on push-down head (30), then salt (11) is put into the annular gap between cylindrical shell (31) and coal petrography sample (33), and thermocouple needle (32) is imbedded to salt ring (11), by (11) compacting of salt ring and draw the wire of thermocouple needle (32); Seaming chuck (35) is positioned over to coal petrography sample (33) upper, then B leaf paraffin powder (34) is put into the annular gap between cylindrical shell (31) and seaming chuck (35); By dial torque wrench, ring screw cover (36) is screwed in to cylindrical shell (31), until compression B pyrophyllite bisque (34) is to certain depth, the default large I of coal petrography confined pressure calculates by moment of torsion conversion, then A cylinder briquetting (9) is put into ring screw cover (36) endoporus;
(3) convex piece (39) is placed in cylindrical shell (31) upper end, it is upper that gland (38) is enclosed within convex piece (39), and it is upper to be fixed on cylindrical shell (31) by B sunk screw (37), and the head of described B sunk screw (37) all scribbles high-temperature insulation glue; Between convex piece (39) and gland (38) step surface, A red copper pad (6) is set, between cylindrical shell (31) and gland (38) surface of contact, B red copper pad (8) is set, between convex piece (39) and B intermediate pressing block (3), A micarex (40) is set;
(4) wire of drawing of thermocouple needle (32) is connected to intelligent temperature controller (41) above, controls the size of the upper electric current of heating electrode plates (18) by bidirectional triode thyristor (42); The gas that coal petrography phase transformation under High Temperature High Pressure effect is produced is drawn by high temperature resistant stainless steel pipe (5), gathers via gas sampler (13) and gas sampling bag (14); In the outer felt of cylindrical shell (31) around B cooling water pipe (10), in the outer felt of high temperature resistant stainless steel pipe (5) around A cooling water pipe (7);
(5) by the mobile lower compression dish of hydraulic elevator platform (22) (23), make coal petrography sample (33) be depressed into initial setting axial load, coal rock deformation amount and axial load value size are respectively by displacement transducer and tension-compression sensor record;
(6) by temperature control heating system, coal petrography sample (33) is heated, in the time reaching design temperature, coal petrography sample (33) insulation, increases coal petrography sample axial load to different set axial load value, in the time reaching maximum setting shaft to load value, stops experiment; Measure the acoustic emission signal in coal petrography sample (33) compression process by calibrate AE sensor (25), use under gas sampling system acquisition certain predetermined confined pressure coal petrography sample (33) phase-change product corresponding when disalignment is to load value.
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