CN211206064U - On-line spectrum testing device under deep coal rock triaxial stress and gas saturation condition - Google Patents
On-line spectrum testing device under deep coal rock triaxial stress and gas saturation condition Download PDFInfo
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- CN211206064U CN211206064U CN201922200607.5U CN201922200607U CN211206064U CN 211206064 U CN211206064 U CN 211206064U CN 201922200607 U CN201922200607 U CN 201922200607U CN 211206064 U CN211206064 U CN 211206064U
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Abstract
On-line spectrum testing arrangement under deep coal petrography triaxial stress and the gas saturation condition, the sampler comprises a sample room, support the steel body, three pressurization section of thick bamboo, the stress tester, the vacuum pump, gas injection system and spectrum tester, support the left surface of the steel body, the pressure hole has all been seted up to trailing flank and downside, the center department of supporting the steel body is equipped with the pressurization chamber, the sample room is placed in the pressurization intracavity, three pressurization section of thick bamboo corresponds respectively and inserts in three pressurization hole, the built-in coal petrography sample that is filled with of sample room, first light inlet has all been seted up at the middle part of every pressurization section of thick bamboo, the second light inlet has all been seted up at the middle part of every pressure head, the right side inner wall of sample room, front side inner wall and upside inner wall all are equipped with film stress transducer, film stress transducer passes through the wire and is connected with the stress tester, spectrum tester's eyepiece. The utility model relates to a science, test accuracy, can real-time supervision and on-line reduction coal petrography in deep stratum triaxial stress and the microcosmic representation under the full gas condition.
Description
Technical Field
The utility model relates to a deep coal petrography material composition, microstructure change test experiment technical field, specific theory relates to an online spectrum testing arrangement under deep coal petrography triaxial stress and the full gas condition.
Background
Coal seam CO injection2Can improve the recovery ratio of coal bed gas, coal to CO2Has an absorption capacity greater than CH4Can produce CO2Displacing CH4The effect of (1). In the 19 th century, in the first CO2Experiments in the injected coal bed show that CO2Injection of CH into displaceable coal seams4The recovery ratio of the coal bed gas can be improved by 9 to 57 percent. CO injection2And then, the coal matrix undergoes structural expansion, and different gas expansion degrees have different degrees and different influence degrees on pore structures. With the intensive research on coal rock gas adsorption and displacement, the research on the change of gas adsorption capacity, gas adsorption and desorption rate, porosity and permeability and the change of mineral components is more concerned when the conditions such as temperature, pressure and the like are improved and changed. In the field of geoscience, high-temperature and high-pressure experiments can provide reliable experimental data for research on composition, structural state and diagenetic mineralization of coal and rock substances in deep strata to a certain extent, and the distance between substance atoms and the interaction between electron layers can change under the conditions of high pressure and ultrahigh pressure. CO 22Is accompanied by an increase in pressure, and when the confining pressure is stabilized, CO2Reacting with water to form weak acidic solution, and reacting with coal rockThe unstable mineral reacts to generate chemical corrosion and chemical precipitation, and the mineral components and the content in the coal are changed. Thus CO in deep coal seams2When gas injection can cause a series of physical and chemical changes of coal rock, the change is reduced under the conditions of high triaxial stress and high fluid pressure of deep stratum, especially CO is injected2、N2Under the gas saturation condition of the gas, the method for researching the change of the coal rock substance components and the microstructure by means of Raman, infrared spectrum and the like has important significance.
At present, research and development technologies of high-temperature and high-pressure devices and on-line characterization technologies of laser Raman reactions are applied more, but devices and testing methods capable of reducing coal rock in deep strata for real-time monitoring and on-line characterization under triaxial stress and gas saturation conditions are still insufficient.
In order to solve the above problems, people are always seeking an ideal technical solution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an online spectrum testing arrangement under deep coal petrography triaxial stress and the full gas condition, the utility model relates to a science, test are accurate, can real-time supervision and on-line reduction coal petrography triaxial stress and the microcosmic representation under the full gas condition in the deep stratum.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the on-line spectrum testing device under the conditions of triaxial stress and gas saturation of deep coal rocks comprises a sample chamber, a supporting steel body, three pressurizing cylinders, a stress tester, a vacuum pump, a gas injection system and a spectrum tester, wherein the sample chamber and the supporting steel body are of a cube structure, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction, pressurizing holes are respectively formed in the left side surface, the back side surface and the lower side surface of the supporting steel body, a pressurizing cavity is arranged at the center of the supporting steel body, the sample chamber is placed in the pressurizing cavity, the inner ends of the three pressurizing holes are respectively communicated with the pressurizing cavities, the three pressurizing cylinders are respectively and correspondingly inserted into the three pressurizing holes, pressure heads are respectively adhered to the inner ends of the three pressurizing cylinders, the three pressure heads respectively and correspondingly press the left side surface, the back side surface and the lower side surface of the sample chamber, the sample chamber is, the middle part of each pressurizing cylinder is provided with a first light inlet hole which is through from inside to outside along the central line direction of the pressurizing hole, the middle part of each pressure head is provided with a second light inlet hole which is through from inside to outside along the central line direction of the pressurizing hole, each first light inlet hole, each second light inlet hole and each light inlet hole respectively correspond from inside to outside, each second light inlet hole is internally provided with a diamond window sheet, the two side corners of the front side of the top part of the sample chamber are respectively provided with a vent hole and a wiring port which are communicated with the inner cavity of the sample chamber, the top part of the supporting steel body is provided with a vent hole and a wiring hole which are communicated with the pressurizing cavity, the vent hole corresponds to the vent hole up and down, the wiring hole corresponds to the wiring port up and down, the vent hole is connected with a vent hose, the vent hose penetrates through the vent hole to extend out of the top part of the, the right side inner wall, the front side inner wall and the upper side inner wall of the sample chamber are respectively provided with a film stress sensor, the film stress sensors are connected with a lead, the lead sequentially penetrates through the wiring port and the wiring hole from inside to outside, extends out of the top of the supporting steel body and is connected with the stress tester, the supporting steel body is placed below the spectrum tester, and eyepieces of the spectrum tester are respectively in butt joint with the outer ends of the corresponding first light inlet holes.
The sample chamber comprises a box body with an opening at the right side and a sealing cover, the left outside of the sealing cover is inserted into the right outside of the box body, a silica gel sealing ring positioned between the right inner wall of the box body and the left outside of the sealing cover is sleeved on the left outside of the sealing cover, the periphery of the sealing cover is fixedly connected to the right side of the box body through screws, the box body and the sealing cover are both made of copper or aluminum, three film stress sensors are respectively adhered to the front inner wall and the upper inner wall of the box body and the left side surface of the sealing cover, pressing seats are respectively adhered to the right side surface, the front side surface and the upper side surface of the pressurizing cavity, the three pressing seats respectively correspond to the right side surface, the front side surface and the upper side surface of the box body of a top pressure sealing cover, the pressing seats and the pressing heads are all of; the supporting steel body and the three pressurizing cylinders are all made of No. 361 steel.
The left surface of the supporting steel body, two-stage ladder blind holes with big outer parts and small inner parts are formed in the periphery of the rear side surface and the lower side surface, outer holes of the two-stage ladder blind holes are unthreaded holes, inner holes of the two-stage ladder blind holes are threaded holes, an end cover with a square shape is formed in the outer end of each pressurizing cylinder in an integrated mode, the size of the end cover is the same as that of the side surface of the supporting steel body, step holes with big outer parts and small inner parts are formed in the periphery of the end cover, each step hole corresponds to the corresponding two-stage ladder blind hole in an internal and external mode, a pressurizing screw is installed in each step hole, an outer end nut of the pressurizing screw is clamped at a step position in each step hole, a plurality of disc-shaped gaskets are sleeved on the pressurizing screw, the outer circle of each disc-shaped gasket is in sliding contact with.
By adopting the technical scheme, the working method of the on-line spectrum testing device under the conditions of the triaxial stress and the gas saturation of the deep coal rock comprises the following steps:
(1) filling a coal rock sample in the sample chamber;
(2) assembling the sample chamber, the support steel body and the three pressurizing cylinders;
(3) vacuumizing the sample chamber, and introducing test gas until the target gas pressure is reached;
(4) adjusting each compression screw to enable the coal rock sample to be subjected to different triaxial stresses, and measuring the triaxial stresses and CO of the coal rock sample in different modes by using a Raman spectrum tester or an infrared spectrum tester2And (5) testing the result of Raman spectrum or infrared spectrum under the saturated air pressure condition.
The step (1) is specifically as follows: firstly, three film stress sensors are respectively adhered to the inner wall of the front side of the box body, the inner wall of the upper side of the box body and the left side face of the sealing cover, wires connected with the three film stress sensors are together penetrated out from a wiring port, one end of a ventilation hose is inserted into a ventilation port, high-temperature glue is injected into a contact position between the outer wall of the ventilation hose and the inner circle of the ventilation port to play a role in sealing, air leakage is prevented, a coal rock sample is placed into the box body, the outer portion of the left side of the sealing cover is inserted into the inner portion of the right side of the box body, the sealing cover is fixedly connected to the right side of the box body by screwing a screw, the sample chamber is assembled, the coal rock sample is massive or powdery, and the powdery coal rock sample needs.
The step (2) is specifically as follows: the three pressure seats are firstly adhered to the right side, the front side and the upper side of the interior of the pressure cavity, the sample chamber is placed in the pressure cavity through one of the pressure holes, the vent hose penetrates through the vent hole and extends out of the top of the support steel body, the lead penetrates through the wiring hole and extends out of the top of the support steel body and is connected with the stress tester, the three pressure cylinders are respectively inserted into the corresponding three pressure holes, each pressure screw is adjusted to enable the inner end of each pressure cylinder to be pushed towards the interior of the support steel body to pre-press the sample chamber, and the three pressure heads are respectively in pressing contact with the left side, the rear side and the lower side of the sample chamber, so that the outer wall of the sample chamber slightly deforms and achieves a.
The step (3) is specifically as follows: firstly, connecting a vent hose with a vacuum pump through a quick connector, opening a stop valve, starting the vacuum pump, vacuumizing the interior of a sample chamber until the target air pressure is reached, determining through a vacuum meter on the vacuum pump, stopping the vacuum pump, closing the stop valve, detaching and separating the vent hose from the vacuum pump, keeping the sample chamber in a vacuum state for a period of time, then connecting the vent hose with a gas injection system through the quick connector, opening the stop valve, starting the gas injection system, and slowly injecting CO into the sample chamber by the gas injection system2The gas, until reaching the saturated pressure, is determined by the pressure gauge on the gas injection system.
The step (4) is specifically as follows: screwing each pressurizing screw to enable the inner ends of the three pressurizing cylinders to slowly push inwards in three mutually perpendicular directions, then the three pressure heads extrude the left side surface, the rear side surface and the lower side surface of the sample chamber inwards, the sample chamber deforms under the action of the three pressure heads until the three film stress sensors test target stress, the screwing of each pressurizing screw is stopped, the supporting steel body is placed below the Raman spectrum tester or the infrared spectrum tester, the first light inlet hole in the pressurizing cylinder in the X-axis direction is in butt joint with the eyepiece of the Raman spectrum tester or the infrared spectrum tester, and therefore Raman spectrum testing is achievedMeasuring the microstructure change of the coal rock sample in the X-axis direction by an instrument or an infrared spectrum tester; converting the direction of the supporting steel body, and butting a first light inlet on the Y-axis direction pressurizing cylinder with an eyepiece of a Raman spectrum tester or an infrared spectrum tester, so as to measure the microstructure change of the coal rock sample in the Y-axis direction through the Raman spectrum tester or the infrared spectrum tester; converting the direction of the supporting steel body, and butting a first light inlet hole on the Z-axis direction pressurizing cylinder with an ocular lens of a Raman spectrum tester or an infrared spectrum tester, so as to measure the microstructure change of the coal rock sample in the Z-axis direction through the Raman spectrum tester or the infrared spectrum tester; the pressure of X, Y, Z three pressurizing cylinders in the axial direction on the sample chamber is adjusted through each pressurizing screw, so that the coal rock sample in the sample chamber is subjected to different triaxial stresses, and the coal rock sample is subjected to different triaxial stresses and CO through a Raman spectrum tester or an infrared spectrum tester2And (5) testing the result of Raman spectrum or infrared spectrum under the saturated air pressure condition.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular, the supporting steel body of the utility model is a cube structure, the left side, the rear side and the lower side of the supporting steel body are all provided with pressurizing holes, the center inside the supporting steel body is provided with a pressurizing cavity, the inner ends of the three pressurizing holes are all communicated with the pressurizing cavity, the sample chamber is placed in the pressurizing cavity, three pressurizing cylinders are inserted into the three pressurizing holes, pressure heads are adhered to the inner ends of the three pressurizing cylinders, the three pressure heads are in abutting contact with the left side surface, the rear side surface and the lower side surface of the sample chamber, therefore, X, Y, Z-axis pressure in three directions is applied to the sample chamber, the coal rock sample in the sample chamber can be subjected to different triaxial stresses by adjusting each pressurizing screw, the vacuum pump is connected with the vent hose to vacuumize the sample chamber, and the gas injection system is connected with the vent hose to slowly inject CO into the sample chamber.2Until the pressure reaches the saturated pressure, respectively butting a first light inlet hole on the X, Y, Z axial direction pressurizing cylinder with an ocular lens of the Raman spectrum tester or the infrared spectrum tester, so that the change of the microstructure of the coal rock sample in the X, Y, Z axial direction is measured by the Raman spectrum tester or the infrared spectrum tester, and the coal rock sample in different directions is obtainedTriaxial stress and CO2The raman spectrum or infrared spectrum test result under the saturated atmospheric pressure condition, the utility model relates to a science, test accuracy, can real-time supervision and on-line reduction coal petrography triaxial stress and the microcosmic representation under the full gas condition in deep stratum.
Drawings
Fig. 1 is a schematic structural view of the support steel body of the present invention.
Fig. 2 is a schematic structural diagram of three pressurizing cylinders and a sample chamber according to the present invention.
Fig. 3 is a left side view of the present invention.
Fig. 4 is a front view of the present invention.
Fig. 5 is a sectional view taken along line a-a in fig. 3.
Fig. 6 is a sectional view taken along line B-B in fig. 3.
Fig. 7 is a sectional view taken along line C-C in fig. 4.
Fig. 8 is a transverse cross-sectional view of a sample chamber of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
Example 1
As shown in figures 1-8, the on-line spectrum testing device under the deep coal rock triaxial stress and gas saturation condition comprises a sample chamber 1, a supporting steel body 2, three pressurizing cylinders 3, a stress tester, a vacuum pump, a gas injection system and a spectrum tester, wherein the sample chamber 1 and the supporting steel body 2 are of a cube structure, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction, pressurizing holes 4 are respectively formed in the left side surface, the back side surface and the lower side surface of the supporting steel body 2, a pressurizing cavity 5 is arranged in the center of the supporting steel body 2, the sample chamber 1 is placed in the pressurizing cavity 5, the inner ends of the three pressurizing holes 4 are respectively communicated with the pressurizing cavity 5, the three pressurizing cylinders 3 are respectively and correspondingly inserted into the three pressurizing holes 4, pressure heads 6 are respectively adhered to the inner ends of the three pressurizing cylinders 3, and the three pressure heads 6, A rear side surface and a lower side surface, a coal rock sample is filled in the sample chamber 1, light inlets 7 are respectively arranged at the left side surface, the rear side surface and the middle part of the lower side surface of the sample chamber 1, a first light inlet 8 which is through from inside to outside is arranged at the middle part of each pressurizing barrel 3 along the central line direction of the pressurizing hole 4, a second light inlet which is through from inside to outside is arranged at the middle part of each pressure head 6 along the central line direction of the pressurizing hole 4, each first light inlet 8, each second light inlet and each light inlet 7 respectively correspond from inside to outside, a diamond window sheet 9 is arranged in each second light inlet, air vents 10 and wiring ports 11 which are communicated with the inner cavity of the sample chamber 1 are respectively arranged at two side corners at the front side of the top part of the sample chamber 1, vent holes 12 and wiring holes 13 which are communicated with the pressurizing cavity 5 are arranged at the top part of the supporting steel body 2, the vent holes 12 correspond to the air, be connected with vent hose 14 on the vent 10, vent hose 14 passes through air vent 12 and stretches out the top of supporting steel body 2, be equipped with the stop valve on the vent hose 14, vent hose 14's outer end passes through quick-operation joint with vacuum pump and gas injection system respectively and can dismantle the connection, the right side inner wall of sample room 1, front side inner wall and upside inner wall all are equipped with film stress sensor 15, film stress sensor 15 is connected with wire 16, wire 16 passes wiring mouth 11 and wiring hole 13 in proper order from inside to outside and stretches out the top of supporting steel body 2 and be connected with the stress tester, support steel body 2 places the below at the spectrum tester, the eyepiece of spectrum tester docks with the outer end of corresponding first light inlet 8 respectively. The shut-off valve and the quick coupling are of conventional design and are not shown.
The sample chamber 1 comprises a box body 17 with an opening at the right side and a sealing cover 18, the left outside of the sealing cover 18 is inserted into the right outside of the box body 17, a silica gel sealing ring positioned between the right inner wall of the box body 17 and the left outside of the sealing cover 18 is sleeved outside the left side of the sealing cover 18, the periphery of the sealing cover 18 is fixedly connected to the right side of the box body 17 through screws 19, the box body 17 and the sealing cover 18 are both made of copper or aluminum, three film stress sensors 15 are respectively adhered to the front inner wall and the upper inner wall of the box body 17 and the left side of the sealing cover 18, pressure seats 20 are respectively adhered to the right side, the front side and the upper side inside the pressurization cavity 5, and the three pressure seats 20 respectively and, the front side surface and the upper side surface of the box body 17, the pressing seat 20 and the pressing head 6 are all of a quadrangular frustum pyramid structure made of tungsten carbide, and the inner end surface of the quadrangular frustum pyramid structure is smaller than the outer end surface of the quadrangular frustum pyramid structure; the supporting steel body 2 and the three pressurizing cylinders 3 are each made of 361-gauge steel. The silica gel sealing ring can play a sealing role and is of a conventional design, and is not shown in the figure.
Two-stage stepped blind holes 21 with large outer parts and small inner parts are formed around the left side surface, the rear side surface and the lower side surface of the supporting steel body 2, outer holes of the two-stage stepped blind holes 21 are smooth holes, inner holes of the two-stage stepped blind holes 21 are threaded holes, a square end cover 22 is integrally formed at the outer end of each pressurizing cylinder 3, the size of the end cover 22 is the same as that of the side surface of the supporting steel body 2, stepped holes 23 with large outer parts and small inner parts are formed around the end cover 22, each stepped hole 23 corresponds to the corresponding two-stage stepped blind hole 21 in and out, a pressurizing screw 24 is installed in each stepped hole 23, a nut at the outer end of the pressurizing screw 24 is clamped at a step in each stepped hole 23, a plurality of disc-shaped gaskets 25 are sleeved on the pressurizing screw 24, the outer circle of each disc-shaped gasket 25 is in smooth movable contact with the outer holes of the two-stage stepped blind holes 21, and, see fig. 4 for a partial sectional view.
By adopting the technical scheme, the working method of the on-line spectrum testing device under the conditions of the triaxial stress and the gas saturation of the deep coal rock comprises the following steps:
(1) filling a coal rock sample in the sample chamber 1;
(2) assembling a sample chamber 1, a supporting steel body 2 and three pressurizing cylinders 3;
(3) vacuumizing the sample chamber 1, and introducing a test gas until the target gas pressure is reached;
(4) adjusting each pressurizing screw 24 to make the coal rock sample bear different triaxial stresses, and measuring the triaxial stresses and CO of the coal rock sample by a Raman spectrum tester or an infrared spectrum tester2And (5) testing the result of Raman spectrum or infrared spectrum under the saturated air pressure condition.
The step (1) is specifically as follows: firstly, three film stress sensors 15 are respectively adhered to the inner wall of the front side and the inner wall of the upper side of a box body 17 and the left side surface of a sealing cover 18, wires 16 connected with the three film stress sensors 15 penetrate out of a wiring port 11 together, one end of a ventilation hose 14 is inserted into a ventilation port 10, high-temperature glue is injected into a contact position between the outer wall of the ventilation hose 14 and the inner circle of the ventilation port 10 to achieve a sealing effect, air leakage is prevented, then a coal rock sample is placed into the box body 17, the outer portion of the left side of the sealing cover 18 is inserted into the inner portion of the right side of the box body 17, the sealing cover 18 is fixedly connected to the right side of the box body 17 by screwing a screw 19, a sample chamber 1 is assembled, the coal rock sample is block-shaped or powdered coal rock, and the powdered coal rock sample needs to.
The step (2) is specifically as follows: the method comprises the steps of firstly, adhering three pressure seats 20 to the right side, the front side and the upper side inside a pressurizing cavity 5, placing a sample chamber 1 into the pressurizing cavity 5 through one pressurizing hole 4, enabling a vent hose 14 to penetrate through a vent hole 12 and extend out of the top of a supporting steel body 2, enabling a lead 16 to penetrate through a wiring hole 13 and extend out of the top of the supporting steel body 2 and be connected with a stress tester, respectively inserting three pressurizing cylinders 3 into the corresponding three pressurizing holes 4, adjusting each pressurizing screw 24 to enable the inner end of each pressurizing cylinder 3 to be pushed towards the inside of the supporting steel body 2 to pre-compress the sample chamber 1, enabling three pressure heads 6 to be respectively in contact with the left side, the rear side and the pressing lower side of the sample chamber 1, and enabling the outer wall of the sample chamber 1 to be slightly deformed and achieve.
The step (3) is specifically as follows: firstly, connecting the vent hose 14 with a vacuum pump through a quick connector, opening a stop valve, starting the vacuum pump, vacuumizing the interior of the sample chamber 1 until the target air pressure is reached, determining through a vacuum meter on the vacuum pump, stopping the vacuum pump, closing the stop valve, disassembling and separating the vent hose 14 from the vacuum pump to keep the sample chamber 1 in a vacuum state for a period of time, then connecting the vent hose 14 with a gas injection system through the quick connector, opening the stop valve, starting the gas injection system, and slowly injecting CO into the sample chamber 1 by the gas injection system2The gas, until reaching the saturated pressure, is determined by the pressure gauge on the gas injection system.
The step (4) is specifically as follows: screwing each pressurizing screw 24 to slowly push the inner ends of the three pressurizing cylinders 3 inwards in three mutually perpendicular directions, so that the three pressure heads 6 press the left side surface, the rear side surface and the lower side surface of the sample chamber 1 inwards, and the sample chamber 1 deforms under the action of the three pressure heads 6 until the three film stress sensors15 testing the target stress, stopping screwing each pressurizing screw 24, placing the supporting steel body 2 below a Raman spectrum tester or an infrared spectrum tester, and butting a first light inlet 8 on the pressurizing cylinder 3 in the X-axis direction with an eyepiece of the Raman spectrum tester or the infrared spectrum tester so as to test the microstructure change of the coal rock sample in the X-axis direction through the Raman spectrum tester or the infrared spectrum tester; converting the direction of the supporting steel body 2, and butting a first light inlet 8 on the Y-axis direction pressurizing cylinder 3 with an eyepiece of a Raman spectrum tester or an infrared spectrum tester, so as to measure the microstructure change of the coal rock sample in the Y-axis direction through the Raman spectrum tester or the infrared spectrum tester; converting the direction of the supporting steel body 2, and butting a first light inlet 8 on the pressurizing cylinder 3 in the Z-axis direction with an ocular lens of a Raman spectrum tester or an infrared spectrum tester, so as to measure the microstructure change of the coal rock sample in the Z-axis direction through the Raman spectrum tester or the infrared spectrum tester; the pressure of X, Y, Z three pressurizing cylinders 3 in the axial direction to the sample chamber 1 is adjusted through each pressurizing screw 24, so that the coal rock sample in the sample chamber 1 is subjected to different triaxial stresses, and the coal rock sample is subjected to different triaxial stresses and CO through a Raman spectrum tester or an infrared spectrum tester2And (5) testing the result of Raman spectrum or infrared spectrum under the saturated air pressure condition.
Stress tester, vacuum pump, gas injection system, raman spectroscopy tester and infrared spectrum tester all are current mature technique, and concrete structure and theory of operation are no longer repeated.
The utility model discloses a support steel body 2 is the square structure, left surface at the support steel body 2, pressurization hole 4 has all been seted up to trailing flank and downside, support steel body 2 inside center is equipped with pressurization chamber 5, the inner of three pressurization hole 4 all communicates with pressurization chamber 5, sample room 1 is placed in pressurization chamber 5, use three pressurization section of thick bamboo 3 to insert in three pressurization hole 4, the inner of three pressurization section of thick bamboo 3 all pastes and has pressure head 6, the left surface of the 6 roof pressure contact sample rooms of three pressure head 1, trailing flank and downside, thereby the pressure of X, Y, Z three directions of axle is applyed to sample room 1, coal petrography sample through adjusting each forcing screw 24 messenger sample room 1 can receive different triaxial stress, the vacuum pumpThe air hose 14 is connected to evacuate the sample chamber 1, and the air injection system is connected to the air hose 14 to slowly inject CO into the sample chamber 12Until the pressure reaches the saturated pressure, the first light inlet hole 8 on the X, Y, Z-axis direction pressurizing cylinder 3 is respectively butted with an ocular lens of a Raman spectrum tester or an infrared spectrum tester, so that the change of the microstructure of the coal rock sample in the X, Y, Z-axis direction is measured by the Raman spectrum tester or the infrared spectrum tester, and the different triaxial stresses and CO of the coal rock sample are obtained2The raman spectrum or infrared spectrum test result under the saturated atmospheric pressure condition, the utility model relates to a science, test accuracy, can real-time supervision and on-line reduction coal petrography triaxial stress and the microcosmic representation under the full gas condition in deep stratum.
Example 2
Different from the embodiment 1, the step (4) is specifically as follows: screwing each pressurizing screw 24 to make the inner ends of the three pressurizing cylinders 3 slowly push inwards in three mutually perpendicular directions, the three pressing heads 6 press the left side, the rear side and the lower side of the sample chamber 1 inwards, the sample chamber 1 deforms under the action of the three pressing heads 6 until the three film stress sensors 15 test the target stress, the pressing screws 24 are stopped to be screwed, the first light inlet holes 8 on the Y-axis and Z-axis direction pressing cylinders 3 are sealed by using sealing plugs, then the supporting steel body 2 is placed in a heating vessel below the Raman spectrum tester or the infrared spectrum tester for water bath heating, the outer end of the X-axis direction pressing cylinder 3 is positioned above the water surface of the heating vessel, the first light inlet holes 8 on the X-axis direction pressing cylinder 3 are in butt joint with an eyepiece of the Raman spectrum tester or the infrared spectrum tester, thereby measuring the microstructure change of the coal rock sample in the X-axis direction through a Raman spectrum tester or an infrared spectrum tester; taking out the support steel body 2 from the vessel, converting the direction of the support steel body 2, pulling out the sealing plug on the Y-axis direction pressurizing cylinder 3, plugging the first light inlet hole 8 on the X-axis direction pressurizing cylinder 3 by using the sealing plug, then placing the support steel body 2 in the heating vessel for water bath heating, positioning the outer end of the Y-axis direction pressurizing cylinder 3 above the water surface of the heating vessel, and positioning the first light inlet hole 8 on the Y-axis direction pressurizing cylinder 3 and the Raman spectrum tester or the infrared spectrumThe eyepieces of the tester are in butt joint, so that the change of the microstructure of the coal rock sample in the Y-axis direction is measured by the Raman spectrum tester or the infrared spectrum tester; taking the supporting steel body 2 out of the vessel, converting the direction of the supporting steel body 2, pulling out a sealing plug on the Z-axis direction pressurizing cylinder 3, plugging a first light inlet hole 8 on the Y-axis direction pressurizing cylinder 3 by using the sealing plug, then placing the supporting steel body 2 in the heating vessel for water bath heating, positioning the outer end of the Z-axis direction pressurizing cylinder 3 above the water surface of the heating vessel, butting the first light inlet hole 8 on the Z-axis direction pressurizing cylinder 3 with an eyepiece of a Raman spectrum tester or an infrared spectrum tester, and thus measuring the microstructure change of the coal rock sample in the Z-axis direction by the Raman spectrum tester or the infrared spectrum tester; the pressure of X, Y, Z three pressurizing cylinders 3 in the axial direction to the sample chamber 1 is adjusted through each pressurizing screw 24, so that the coal rock sample in the sample chamber 1 is subjected to different triaxial stresses, and the coal rock sample is subjected to different triaxial stresses and CO through a Raman spectrum tester or an infrared spectrum tester2And testing the result of Raman spectrum or infrared spectrum under the conditions of saturated air pressure and certain temperature.
The above embodiments are only used for illustrating but not limiting the technical solution of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that; the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (3)
1. On-line spectrum testing arrangement under deep coal petrography triaxial stress and gas saturation condition, its characterized in that: the device comprises a sample chamber, a supporting steel body, three pressurizing cylinders, a stress tester, a vacuum pump, a gas injection system and a spectrum tester, wherein the sample chamber and the supporting steel body are of a cube structure, the X-axis direction is specified to be the left-right direction, the Y-axis direction is specified to be the front-back direction, and the Z-axis direction is specified to be the up-down direction, pressurizing holes are formed in the left side surface, the back side surface and the lower side surface of the supporting steel body, a pressurizing cavity is arranged at the center of the supporting steel body, the sample chamber is placed in the pressurizing cavity, the inner ends of the three pressurizing holes are communicated with the pressurizing cavity, the three pressurizing cylinders are correspondingly inserted into the three pressurizing holes respectively, pressure heads are adhered to the inner ends of the three pressurizing cylinders, the three pressure heads respectively correspond to the left side surface, the back side surface and the lower side surface of the sample chamber, a coal rock sample is filled in the sample chamber, light inlets are formed in the middle parts of the left side surface, the middle part of each pressure head is provided with an inner and outer through second light inlet hole along the central line direction of the pressurizing hole, each first light inlet hole, each second light inlet hole and each light inlet hole respectively correspond to the inside and the outside, each second light inlet hole is internally and externally provided with a diamond window sheet, the two side corners of the front side of the top part of the sample chamber are respectively provided with a vent hole and a wiring hole which are communicated with the inner cavity of the sample chamber, the top part of the support steel body is provided with a vent hole and a wiring hole which are communicated with the pressurizing cavity, the vent hole corresponds to the vent hole up and down, the wiring hole corresponds to the wiring hole up and down, the vent hole is connected with a vent hose, the vent hose penetrates through the vent hole and extends out of the top part of the support steel body, the vent hose is provided with a stop valve, the outer end of the vent hose is detachably connected with a, the film stress sensor is connected with a lead, the lead sequentially penetrates through the wiring port and the wiring hole from inside to outside to extend out of the top of the supporting steel body and is connected with the stress tester, the supporting steel body is placed below the spectrum tester, and eyepieces of the spectrum tester are respectively in butt joint with the outer ends of the corresponding first light inlet holes.
2. The deep coal rock on-line spectrum testing device under the triaxial stress and gas saturation condition of claim 1, characterized in that: the sample chamber comprises a box body with an opening at the right side and a sealing cover, the left outside of the sealing cover is inserted into the right outside of the box body, a silica gel sealing ring positioned between the right inner wall of the box body and the left outside of the sealing cover is sleeved on the left outside of the sealing cover, the periphery of the sealing cover is fixedly connected to the right side of the box body through screws, the box body and the sealing cover are both made of copper or aluminum, three film stress sensors are respectively adhered to the front inner wall and the upper inner wall of the box body and the left side surface of the sealing cover, pressing seats are respectively adhered to the right side surface, the front side surface and the upper side surface of the pressurizing cavity, the three pressing seats respectively correspond to the right side surface, the front side surface and the upper side surface of the box body of a top pressure sealing cover, the pressing seats and the pressing heads are all of; the supporting steel body and the three pressurizing cylinders are all made of No. 361 steel.
3. The deep coal rock on-line spectrum testing device under the triaxial stress and gas saturation condition of claim 1 or 2, characterized in that: the left surface of the supporting steel body, two-stage ladder blind holes with big outer parts and small inner parts are formed in the periphery of the rear side surface and the lower side surface, outer holes of the two-stage ladder blind holes are unthreaded holes, inner holes of the two-stage ladder blind holes are threaded holes, an end cover with a square shape is formed in the outer end of each pressurizing cylinder in an integrated mode, the size of the end cover is the same as that of the side surface of the supporting steel body, step holes with big outer parts and small inner parts are formed in the periphery of the end cover, each step hole corresponds to the corresponding two-stage ladder blind hole in an internal and external mode, a pressurizing screw is installed in each step hole, an outer end nut of the pressurizing screw is clamped at a step position in each step hole, a plurality of disc-shaped gaskets are sleeved on the pressurizing screw, the outer circle of each disc-shaped gasket is in sliding contact with.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113358480A (en) * | 2021-05-13 | 2021-09-07 | 太原理工大学 | Coal rock mechanical test device and test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358480A (en) * | 2021-05-13 | 2021-09-07 | 太原理工大学 | Coal rock mechanical test device and test method |
| CN113358480B (en) * | 2021-05-13 | 2022-08-05 | 太原理工大学 | Coal rock mechanical test device and test method |
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