CN113791027A - Long-term erosion device and test method for damaged rock sample - Google Patents
Long-term erosion device and test method for damaged rock sample Download PDFInfo
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- CN113791027A CN113791027A CN202111351982.5A CN202111351982A CN113791027A CN 113791027 A CN113791027 A CN 113791027A CN 202111351982 A CN202111351982 A CN 202111351982A CN 113791027 A CN113791027 A CN 113791027A
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- 239000011435 rock Substances 0.000 title claims abstract description 119
- 230000007774 longterm Effects 0.000 title claims abstract description 22
- 230000003628 erosive effect Effects 0.000 title claims abstract description 10
- 238000010998 test method Methods 0.000 title claims description 4
- 239000003245 coal Substances 0.000 claims abstract description 91
- 238000002347 injection Methods 0.000 claims abstract description 54
- 239000007924 injection Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000243 solution Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000007654 immersion Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 239000012466 permeate Substances 0.000 claims abstract description 5
- 238000002791 soaking Methods 0.000 claims description 53
- 238000005530 etching Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 2
- 230000003204 osmotic effect Effects 0.000 abstract description 11
- 238000004088 simulation Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 8
- 235000017491 Bambusa tulda Nutrition 0.000 description 8
- 241001330002 Bambuseae Species 0.000 description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 8
- 239000011425 bamboo Substances 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 5
- 238000001802 infusion Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
- G01N1/31—Apparatus therefor
Abstract
The invention relates to the technical field of coal rock mass testing, in particular to a damaged rock sample long-term erosion device and a testing method, which comprise the following steps: the device comprises an immersion cylinder, a sample cover, a gas injection system and a water injection system, wherein a coal rock sample is correspondingly placed at the bottom of the immersion cylinder, and a through hole which is opposite to the coal rock sample is formed in the middle of a boss; the sample lid is placed in coal rock mass sample top, sample lid middle part is equipped with the perforation just to coal rock mass sample, tightly cover the sample lid along corresponding cover through the rubber sleeve, the outside of coal rock mass sample and boss, through gas injection system and water injection system with the outside confined pressure environment of simulation coal rock mass sample, tightly make the soak solution from sample lid direction coal rock mass sample through the rubber sleeve cover, and derive from the perforation at boss middle part after coal rock mass sample is inside to permeate, thereby make the liquid of injecting into by the sample top can be at the inside flow of rock sample, and then simulate real confined pressure environment and osmotic pressure condition.
Description
Technical Field
The invention belongs to the technical field of coal rock mass testing, and particularly relates to a damaged rock sample long-term erosion device and a testing method.
Background
Currently, coal mine underground reservoir engineering is still in an exploration test stage. In recent years, the stability of the coal pillar dam is a research hotspot of coal mine underground reservoir engineering, and different students carry out a great deal of research work around the stability influence factors of the coal pillar dam such as earthquake, water pressure, arrangement mode, water immersion softening and the like.
Scholars at home and abroad carry out a great deal of research work around the softening effect of water on coal, reveal the law of influence of water on the mechanical properties of coal-rock mass, clarify the microscopic mechanism of softening of coal-rock mass by water and provide a relation model between the mechanical parameters of coal-rock mass and water content. It can be seen that the influence of water on the mechanical properties of the pillar dam is very obvious and is a non-negligible factor in the research of the disaster-causing mechanism of creep instability of the pillar dam.
The conventional coal pillar creep instability mechanism is analyzed from multiple angles such as coal-rock body mechanical property, creep damage evolution and instability conditions, a large amount of research work is carried out by means of indoor tests, numerical simulation, theoretical analysis and the like around the influences of water on coal body softening and osmotic pressure on coal-rock body creep and conventional coal pillar creep instability criteria and the like, a coal-rock body mechanical property evolution model and a coal-rock body creep-seepage coupling theoretical model are preliminarily established, occurrence conditions and disaster-causing criteria of conventional coal pillar creep instability are provided, and a theoretical basis is provided for guiding safety production of a coal mine. However, the stability research of the coal pillar dam of the coal mine underground reservoir is still in the initial stage, the research result of the creep instability of the coal pillar dam is very deficient, the coal pillar dam can bear more complex stress, chemical and osmotic pressure action environments in the long-term operation of the coal mine underground reservoir, at present, the understanding of the mechanism of the creep instability of the coal pillar dam caused by disaster is not sufficient, and the creep instability behavior of the coal pillar dam under the combined action of water immersion softening, stress and osmotic pressure needs to be deeply researched by combining the operation environment of the coal mine underground reservoir, so that the mechanism of the creep instability caused by the creep instability of the coal pillar dam of the underground reservoir is further discussed.
The existing soaking device for rock materials can only realize the external circulation of liquid on a rock sample, cannot consider the influence of osmotic pressure and the like on the rock sample, and cannot ensure that the liquid effectively soaks the sample.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a test device capable of performing internal permeation circulation of a coal rock sample.
In order to achieve the above purpose, the invention provides the following technical scheme:
a damaged rock sample long term etching apparatus, the etching apparatus comprising:
the device comprises an immersion cylinder, a sample collecting device and a sample collecting device, wherein the immersion cylinder is a closed pressure-resistant container, the bottom of the immersion cylinder is provided with a plurality of bosses, coal and rock mass samples are correspondingly placed on the bosses, and the middle parts of the bosses are provided with through holes which are opposite to the coal and rock mass samples and extend to the lower surface of the immersion cylinder;
the sample cover is placed above the coal-rock sample, a through hole which is opposite to the coal-rock sample is formed in the middle of the sample cover, and the sample cover, the coal-rock sample and the lug boss are tightly sleeved along the corresponding direction through rubber sleeves, so that the soak solution permeates in the sample cover along the axial direction of the coal-rock sample;
the gas injection system is correspondingly communicated with the soaking cylinder so as to inject gas into the soaking cylinder and pressurize the interior of the soaking cylinder;
the water injection system is correspondingly communicated with the soaking cylinder so as to inject soaking liquid into the soaking cylinder; and the soak solution is guided to the coal rock sample by the sample cover, and is guided out from the through hole in the middle of the lug boss after being permeated in the coal rock sample.
Preferably, the etching device further comprises an exchange cylinder and a measuring cylinder;
the exchange cylinder is correspondingly communicated with the through holes in the lug boss through connecting pipes so as to guide the soak solution which permeates in the coal rock sample into the exchange cylinder, and the top of the exchange cylinder is provided with an exhaust pipe communicated with the measuring cylinder so as to exhaust the air with the volume same as that of the introduced soak solution;
the measuring cylinder is filled with water, and the exhaust pipe is communicated with the side wall below the liquid level of the water corresponding to the measuring cylinder.
Preferably, the water injection system comprises a first air compressor and a first pneumatic pressure barrel which are sequentially communicated, the first pneumatic pressure barrel is filled with the soaking liquid, and the water outlet end of the first pneumatic pressure barrel is connected to the soaking barrel through a connecting pipe.
Preferably, the gas injection system comprises a second air compressor and a second pneumatic pressure barrel which are sequentially communicated, and the gas outlet end of the second pneumatic pressure barrel is connected to the soaking barrel through a connecting pipe.
Preferably, the infusion cylinder comprises:
the bosses are correspondingly distributed on the upper surface of the base, supporting legs corresponding to the bosses are arranged on the lower surface of the base, and the through holes in the bosses axially penetrate through the bosses and the supporting legs;
the device comprises a main cylinder, a support and a control device, wherein the main cylinder is a cylinder body with openings at two ends, and flanges are arranged at two ends of the main cylinder;
the cylinder cover is provided with a plurality of gas injection holes corresponding to the gas injection system and a plurality of water injection holes corresponding to the water injection system, and the plurality of water injection holes are mutually corresponding to the lug boss in the axial direction;
the cylinder cover and the base are respectively connected with two ends of the main cylinder through flanges.
Preferably, the base, the boss and the foot are integrally formed.
Preferably, a clamp is arranged outside the rubber sleeve, so that the rubber sleeve is tightly attached to the sample cover, the coal rock sample and the boss for sealing.
Preferably, there are two clamps, and two clamps are respectively sleeved on the sample cover and the boss.
A long-term erosion test method for damaged rock samples is characterized by comprising the following steps:
step S1, placing the coal rock sample on a boss, and sealing the soaking cylinder;
step S2, injecting a soaking solution into the soaking cylinder, and after the soaking solution is over the rock sample, starting a gas injection system to pressurize the soaking cylinder so as to simulate a confining pressure environment;
step S3, enabling the soaking liquid to flow through the coal rock mass sample and then seep out from the middle part of the lug boss, then starting a water injection system, and adjusting the pressurizing strength of the gas injection system from weak to strong;
and step S4, observing the interval time of not less than two bubbles in the measuring cylinder, and performing long-term circulating soaking test when the interval time of adjacent bubbles is the same and the internal part of the coal rock sample reaches a stable seepage critical value and the pressurizing strength of the gas injection system is kept unchanged.
Preferably, in step S1, the plurality of coal-rock mass samples are in one-to-one correspondence with the bosses, the sample covers are placed above the coal-rock mass samples, the rubber sleeves are correspondingly and tightly sleeved on the sample covers, the coal-rock mass samples and the bosses, and the rubber sleeves are tightly clamped outside the rubber sleeves through the hoops, so that the soak solution is guided to the coal-rock mass samples from the sample covers and is guided out from the through holes in the middles of the bosses after being permeated inside the coal-rock mass samples.
Has the advantages that: through gas injection system and water injection system with the outside confined pressure environment of simulation coal rock body sample, tightly make the soak solution from sample lid direction coal rock body sample through the rubber sleeve cover, and derive from the perforation at boss middle part after permeating in coal rock body sample inside, thereby make the liquid of injecting by the sample top can be at the inside flow of rock sample, and then simulate real confined pressure environment and osmotic pressure condition, and can change the inside osmotic pressure of coal rock body sample through the pressure of control gas injection system, can control the inside seepage condition of sample through osmotic pressure, and then can realize the research of different osmotic pressures to the influence of coal rock body sample.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic view showing the overall structure of an etching apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of the mounting of the infusion canister in the embodiment of the present invention;
FIG. 3 is a schematic view of a base in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a primary cartridge in an embodiment of the present invention;
FIG. 5 is a schematic structural view of a cover of the embodiment of the present invention;
FIG. 6 is a schematic structural view of a measuring cylinder according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an exchange cartridge in an embodiment of the present invention.
In the figure: 1. a base; 2. a main barrel; 3. a cylinder cover; 4. a coal rock mass sample; 5. an exchange cylinder; 6. a measuring cylinder; 7. a second air compressor; 8. a second pneumatic pressure barrel; 9. a first pneumatic pressure barrel; 10. a first air compressor; 11. a sample cover; 12. a boss; 13. a flange; 14. perforating; 21. Mounting holes; 31. a gas injection hole; 32. a water injection hole; 51. and an exchange cylinder upper cover.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1-7, a long-term erosion apparatus for damaged rock samples, the erosion apparatus comprising: the device comprises an immersion cylinder, a sample cover 11, a gas injection system and a water injection system, wherein the immersion cylinder is a closed pressure-resistant container, the bottom of the immersion cylinder is provided with a plurality of bosses 12, the bosses 12 are used for placing coal rock mass samples 4, the middle parts of the bosses 12 are provided with through holes 14 which are opposite to the coal rock mass samples 4, and the through holes penetrate through the bottom of the immersion cylinder so as to lead out immersion liquid; the sample cover 11 is placed above the coal rock mass sample 4, a through hole 14 which is right opposite to the coal rock mass sample 4 is formed in the middle of the sample cover 11, the coal rock mass sample 4 and the boss 12 are tightly sleeved through a rubber sleeve, the inner diameter of the rubber sleeve is smaller than the outer diameters of the sample cover 11, the coal rock mass sample 4 and the boss 12, the rubber sleeve is tightly attached in a telescopic mode to guarantee sealing performance, the through hole 14 in the middle of the sample cover 11, the axis of the coal rock mass sample 4 and the through hole 14 in the boss 12 are located on the same straight line through the rubber sleeve, and a gas injection system is correspondingly communicated with the soaking cylinder to inject gas into the soaking cylinder and pressurize the interior of the soaking cylinder; the water injection system is correspondingly communicated with the soaking cylinder so as to inject soaking liquid into the soaking cylinder; the soak solution is guided to the coal rock mass sample 4 from the sample cover 11, and is guided out from the through hole 14 in the middle of the lug boss 12 after being permeated in the coal rock mass sample 4. Therefore, liquid injected from the top of the sample can flow in the rock sample, so that the real ambient pressure environment and osmotic pressure conditions can be simulated, and further the research on the influence of different osmotic pressures on the coal rock sample 4 can be realized.
In another alternative embodiment, the etching apparatus further comprises an exchange cylinder 5 and a measuring cylinder 6; the exchange cylinder 5 is correspondingly communicated with the through hole 14 on the boss 12 through a connecting pipe so as to guide the soak solution permeated in the coal rock body sample 4 into the exchange cylinder 5, the exchange cylinder 5 is cylindrical and comprises an exchange cylinder upper cover 51 and an exchange cylinder main body, the exchange cylinder main body is in a measuring cylinder shape, the exchange cylinder upper cover 51 is matched with the open end at the upper end of the exchange cylinder main body and is fastened with the exchange cylinder main body through reserved threads, specifically, the exchange cylinder upper cover 51 is buckled at the upper end of the exchange cylinder main body and is connected with the exchange cylinder main body through internal threads, in order to ensure the sealing property, a sealing gasket is arranged between the exchange cylinder upper cover 51 and the exchange cylinder main body, two connecting holes are reserved on the exchange cylinder upper cover 51, one connecting hole is correspondingly connected with the through hole at the bottom of the boss 12 through the connecting pipe, the other connecting hole is connected with the measuring cylinder 6 through an exhaust pipe, when the soak solution permeated in the coal rock body sample 4 is injected, the internal space of the exchange cylinder 5 is correspondingly reduced to discharge the air with the same volume as the introduced soaking liquid; the measuring cylinder 6 is filled with water, the exhaust pipe is communicated with the side wall below the liquid level of the water corresponding to the measuring cylinder 6, bubbles in the measuring cylinder 6 can be observed, whether the interior of the coal rock mass sample 4 reaches a stable seepage critical value or not is judged through the interval time of at least two adjacent bubbles, specifically, the two adjacent bubbles are taken as an example, and when the interval time of the two adjacent bubbles is the same, the interior of the coal rock mass sample 4 reaches the stable seepage critical value is considered. Wherein, exchange section of thick bamboo and graduated flask are transparent material to carry out the bubble and observe.
In another alternative embodiment, the water injection system comprises a first air compressor 10 and a first pneumatic pressure barrel 9 which are sequentially communicated, the first pneumatic pressure barrel 9 contains the soaking liquid, and the water outlet end of the first pneumatic pressure barrel 9 is connected to the soaking barrel through a connecting pipe. The gas injection system comprises a second air compressor 7 and a second pneumatic pressure barrel 8 which are sequentially communicated, and the gas outlet end of the second pneumatic pressure barrel 8 is connected to the soaking barrel through a connecting pipe.
The connecting tube may be a pc tube or a bellows tube. Wherein, the first pneumatic pressure barrel 9 and the second pneumatic pressure barrel 8 are both commercially available products, and the water injection system and the gas injection system of the invention only utilize different functions of the pneumatic pressure barrels.
In another alternative embodiment, the infusion cartridge comprises: the cylinder type automatic sealing device comprises a base 1, a main cylinder 2 and a cylinder cover 3, wherein the main cylinder 2 is cylindrical, bosses 12 are correspondingly distributed on the base 1, the bosses 12 are distributed in an annular array relative to the circle center corresponding to the base 1, specifically, the bosses 12 are correspondingly distributed on the upper surface of the base 1, support legs corresponding to the bosses 12 are arranged on the lower surface of the base 1, and through holes 14 located on the bosses 12 axially penetrate through the bosses 12 and the support legs; the main cylinder 2 is a cylinder body with two open ends, and two ends of the main cylinder 2 are provided with flanges 13; the cylinder cover 3 is provided with a plurality of gas injection holes 31 corresponding to the gas injection system and a plurality of water injection holes 32 corresponding to the water injection system, and the plurality of water injection holes 32 axially correspond to the bosses 12; the cover 3 and the base 1 are respectively connected to two ends of the main cylinder 2 through flanges 13.
All be equipped with 8 mounting holes 21 on the flange 13 at main section of thick bamboo 2 both ends, be equipped with the mounting hole 21 that corresponds main section of thick bamboo 2 on cover 3 and the base 1 to be connected cover 3 and main section of thick bamboo 2, base 1 and main section of thick bamboo 2 through the bolt, all set up sealed pad between cover 3 and main section of thick bamboo 2, base 1 and main section of thick bamboo 2, guarantee to soak the leakproofness of a section of thick bamboo with this.
In the present embodiment, the cover 3, the main tube 2, and the base 1 are made of metal material, preferably stainless steel.
In this embodiment, the through hole 14 of the leg at the bottom of the boss 12 is connected through a screw joint or a screw thread to the connecting pipe, and the connecting pipes of the gas injection system and the water injection system are connected through a screw joint or a screw thread to the cylinder cover 3.
In an alternative embodiment, the base 1, the boss 12 and the legs are integrally formed.
In another optional embodiment, a clamp is arranged outside the rubber sleeve, so that the rubber sleeve is tightly attached to the sample cover 11, the coal rock body sample 4 and the boss 12 for sealing, and the tightness of the rubber sleeve, the coal rock body sample 4, the boss 12 and the sample cover 11 is ensured by tightening the clamp, so that the soak cannot enter from a gap between the coal rock body sample 4 and the boss 12 and a gap between the coal rock body sample 4 and the sample cover 11, and the precision of the test result is ensured.
In this embodiment, the coal rock mass sample 4, the sample cover 11 and the boss 12 are all cylindrical bodies, and the diameters of the three are the same, so as to keep close fit with the clamp.
The two clamping bands are respectively sleeved on the sample cover 11 and the boss 12. The band is preferably stainless steel.
In another alternative embodiment, a method for testing long-term erosion of damaged rock samples is also provided, comprising the following steps:
step S1, placing the coal rock mass sample 4 on the boss 12, and sealing the soaking cylinder;
step S2, injecting a soaking solution into the soaking cylinder, after the soaking solution submerges the rock sample, preferably, the water depth exceeds that of the coal rock sample 4, and starting a gas injection system to pressurize the soaking cylinder so as to simulate a confining pressure environment;
step S3, enabling the soaking liquid to flow through the coal rock mass sample 4 and then seep out from the middle through hole 14 of the boss 12, then starting a water injection system, and adjusting the pressurizing strength of the gas injection system from weak to strong;
and step S4, observing the interval time of no less than two adjacent bubbles in the measuring cylinder 6, and performing long-term circulating soaking test when the interval time of the adjacent bubbles is the same and the internal part of the coal rock mass sample 4 reaches a stable seepage critical value, and keeping the pressurizing strength of the gas injection system unchanged.
By analyzing the creep damage characteristics of the coal rock sample 4 soaked in different solutions for different times, the influence rule of the solution concentration and the soaking time on the coal rock creep instability is summarized, and a creep model of the soaked coal rock under the stress-osmotic pressure coupling effect is established by combining the evolution rule of the mechanical properties of the soaked coal rock.
In some embodiments, in step S1, a plurality of coal rock mass samples 4 are in one-to-one correspondence with the bosses 12, and the sample cover 11 is placed above the coal rock mass samples 4, and the soaking solution is guided from the sample cover 11 to the coal rock mass samples 4 by tightly sleeving the sample cover 11, the coal rock mass samples 4 and the bosses 12 with rubber sleeves and tightly clamping the rubber sleeves by clamps outside the rubber sleeves, and is guided out from the through holes 14 in the middle of the bosses 12 after the soaking solution is conducted inside the coal rock mass samples 4. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (10)
1. A damaged rock sample long-term etching device, characterized in that the etching device comprises:
the device comprises an immersion cylinder, a sample collecting device and a sample collecting device, wherein the immersion cylinder is a closed pressure-resistant container, the bottom of the immersion cylinder is provided with a plurality of bosses, coal and rock mass samples are correspondingly placed on the bosses, and the middle parts of the bosses are provided with through holes which are opposite to the coal and rock mass samples and extend to the lower surface of the immersion cylinder;
the sample cover is placed above the coal-rock sample, a through hole which is opposite to the coal-rock sample is formed in the middle of the sample cover, and the sample cover, the coal-rock sample and the lug boss are tightly sleeved along the corresponding direction through rubber sleeves, so that the soak solution permeates in the sample cover along the axial direction of the coal-rock sample;
the gas injection system is correspondingly communicated with the soaking cylinder so as to inject gas into the soaking cylinder and pressurize the interior of the soaking cylinder;
the water injection system is correspondingly communicated with the soaking cylinder so as to inject soaking liquid into the soaking cylinder; and the soak solution is guided to the coal rock sample by the sample cover, and is guided out from the through hole in the middle of the lug boss after being permeated in the coal rock sample.
2. The apparatus for long-term etching of damaged rock samples according to claim 1, wherein the etching apparatus further comprises an exchange cylinder and a measuring cylinder;
the exchange cylinder is correspondingly communicated with the through holes in the lug boss through connecting pipes so as to guide the soak solution which permeates in the coal rock sample into the exchange cylinder, and the top of the exchange cylinder is provided with an exhaust pipe communicated with the measuring cylinder so as to exhaust the air with the volume same as that of the introduced soak solution;
the measuring cylinder is filled with water, and the exhaust pipe is communicated with the side wall below the liquid level of the water corresponding to the measuring cylinder.
3. The damaged rock sample long-term etching device according to claim 1, wherein the water injection system comprises a first air compressor and a first pneumatic pressure barrel which are sequentially communicated, the first pneumatic pressure barrel contains soaking liquid, and the water outlet end of the first pneumatic pressure barrel is connected to the soaking barrel through a connecting pipe.
4. The damaged rock sample long-term etching device according to claim 1, wherein the gas injection system comprises a second air compressor and a second pneumatic pressure barrel which are sequentially communicated, and the gas outlet end of the second pneumatic pressure barrel is connected to the soaking barrel through a connecting pipe.
5. The apparatus for long-term etching of damaged rock specimens according to claim 1, wherein the immersion cylinder comprises:
the bosses are correspondingly distributed on the upper surface of the base, supporting legs corresponding to the bosses are arranged on the lower surface of the base, and the through holes in the bosses axially penetrate through the bosses and the supporting legs;
the device comprises a main cylinder, a support and a control device, wherein the main cylinder is a cylinder body with openings at two ends, and flanges are arranged at two ends of the main cylinder;
the cylinder cover is provided with a plurality of gas injection holes corresponding to the gas injection system and a plurality of water injection holes corresponding to the water injection system, and the plurality of water injection holes are mutually corresponding to the lug boss in the axial direction;
the cylinder cover and the base are respectively connected with two ends of the main cylinder through flanges.
6. The damaged rock long-term etching device of claim 5, wherein the base, the boss and the support leg are integrally formed.
7. The damaged rock long-term etching device of claim 1, wherein a clamp is arranged outside the rubber sleeve so that the rubber sleeve can be tightly sealed against the sample cover, the coal rock sample and the boss.
8. The damaged rock long-term etching device of claim 7, wherein the number of the clamping bands is two, and the two clamping bands are sleeved on the test sample cover and the boss respectively.
9. A long-term erosion test method for damaged rock samples is characterized by comprising the following steps:
step S1, placing the coal rock sample on a boss, and sealing the soaking cylinder;
step S2, injecting a soaking solution into the soaking cylinder, and after the soaking solution is over the rock sample, starting a gas injection system to pressurize the soaking cylinder so as to simulate a confining pressure environment;
step S3, enabling the soaking liquid to flow through the coal rock mass sample and then seep out from the middle part of the lug boss, then starting a water injection system, and adjusting the pressurizing strength of the gas injection system from weak to strong;
and step S4, observing the interval time of not less than two bubbles in the measuring cylinder, and performing long-term circulating soaking test when the interval time of adjacent bubbles is the same and the internal part of the coal rock sample reaches a stable seepage critical value and the pressurizing strength of the gas injection system is kept unchanged.
10. The method for long-term erosion testing of damaged rock samples according to claim 9, wherein in step S1, a plurality of coal rock samples are placed in one-to-one correspondence with the bosses, a sample cover is placed above the coal rock samples, the rubber sleeve is tightly sleeved on the sample cover, the coal rock samples and the bosses in correspondence, and is tightly clamped outside the rubber sleeve through a clamp, so that the soak solution is guided to the coal rock samples from the sample cover, penetrates the inside of the coal rock samples, and is led out from the through holes in the middle of the bosses.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351982.5A CN113791027B (en) | 2021-11-16 | 2021-11-16 | Long-term etching device for damaged rock sample |
| CN202111652477.4A CN114486701B (en) | 2021-11-16 | 2021-11-16 | Long-term erosion test method for damaged rock sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351982.5A CN113791027B (en) | 2021-11-16 | 2021-11-16 | Long-term etching device for damaged rock sample |
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| CN202111652477.4A Division CN114486701B (en) | 2021-11-16 | 2021-11-16 | Long-term erosion test method for damaged rock sample |
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| CN113791027A true CN113791027A (en) | 2021-12-14 |
| CN113791027B CN113791027B (en) | 2022-02-08 |
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| CN202111652477.4A Active CN114486701B (en) | 2021-11-16 | 2021-11-16 | Long-term erosion test method for damaged rock sample |
| CN202111351982.5A Active CN113791027B (en) | 2021-11-16 | 2021-11-16 | Long-term etching device for damaged rock sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115683794A (en) * | 2023-01-05 | 2023-02-03 | 华北科技学院(中国煤矿安全技术培训中心) | Rock sample long-term etching device, system and method in triaxial environment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004019029A1 (en) * | 2002-08-23 | 2004-03-04 | Norsk Hydro Asa | Device and method for petrophysical analysis of a rock sample |
| WO2018129920A1 (en) * | 2017-01-12 | 2018-07-19 | 四川大学 | Sample component for radial permeability test of rock having extra-low permeability and test method therefor |
| CN109211757A (en) * | 2018-11-05 | 2019-01-15 | 长安大学 | A kind of In Rock Seepage Tests device and its test method |
| CN109612907A (en) * | 2018-12-27 | 2019-04-12 | 太原理工大学 | Fractured coal and rock testing permeability experimental rig and method |
| CN110530784A (en) * | 2019-08-22 | 2019-12-03 | 河南工程学院 | Simulate the soak test device and method of corrosivity pressure water environment |
| CN110887775A (en) * | 2019-12-02 | 2020-03-17 | 西安科技大学 | System and method for testing permeability of triaxial slurry of post-peak fractured rock |
| US20200249182A1 (en) * | 2019-01-31 | 2020-08-06 | King Fahd University Of Petroleum And Minerals | Method and apparatus for measuring capillary pressure and foam transport in porous media |
| WO2021003996A1 (en) * | 2019-07-05 | 2021-01-14 | 中国矿业大学 | Experimentation apparatus and method utilizing x-ray for measuring content and distribution of water in coal rock |
| CN112782000A (en) * | 2021-01-28 | 2021-05-11 | 中国矿业大学 | Testing device and method for high-pressure mine water-rock (coal) coupling effect |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048261B (en) * | 2013-01-21 | 2014-12-31 | 中国科学院武汉岩土力学研究所 | Device and method for researching rock physical property parameter change under action of acid fluid |
| CN103267722B (en) * | 2013-05-07 | 2015-08-12 | 中国矿业大学 | A kind of pressure-bearing osmotic grouting reinforcement experiment device and method |
| WO2015023409A1 (en) * | 2013-08-13 | 2015-02-19 | Schlumberger Canada Limited | Digital core sensitivity analysis |
| CN104198354B (en) * | 2014-09-28 | 2016-08-31 | 湖南科技大学 | A kind of raw coal is transparent pours part, preparation method and permeance property test device |
| CN104535470B (en) * | 2014-12-12 | 2017-05-10 | 上海交通大学 | Penetration and corrosion triaxial testing apparatus for gravel soil and testing method thereof |
| CN106351621B (en) * | 2016-09-08 | 2018-11-20 | 中国石油大学(华东) | For studying the experimental facilities of oil gas wellbore gas intrusion and migration mechanism |
| CN106525690B (en) * | 2016-12-02 | 2020-01-07 | 中国石油天然气股份有限公司 | Method for measuring gas-water relative permeability curve by tight sandstone steady-state method |
| CN108181201A (en) * | 2017-12-15 | 2018-06-19 | 浙江海洋大学 | One kind passes through CO2The experimental method and experimental provision of replacement exploitation shale gas |
| CN108489799B (en) * | 2018-02-27 | 2020-09-08 | 中国科学院武汉岩土力学研究所 | Rock gas triaxial/bare triaxial compression test device, system and method |
| CN108333060B (en) * | 2018-03-27 | 2024-03-26 | 武汉市政工程设计研究院有限责任公司 | Testing machine for measuring clay rock shear fracture permeability coefficient evolution by adopting steady-state method |
| CN108508274B (en) * | 2018-06-05 | 2020-10-09 | 中国石油天然气股份有限公司 | Resistivity measurement method, device and system |
| CN108952659B (en) * | 2018-07-11 | 2020-06-05 | 中国石油大学(北京) | Visual supercritical carbon dioxide fracturing physical simulation test method |
| CN110231279B (en) * | 2019-07-08 | 2021-06-25 | 中铁十一局集团第五工程有限公司 | Comprehensive test method for dry-wet cycle corrosion of rock |
| CN110208128B (en) * | 2019-07-08 | 2024-02-20 | 中铁十一局集团第五工程有限公司 | Rock dynamic and static water environment and drying simulation comprehensive test system |
| CN110646329A (en) * | 2019-08-26 | 2020-01-03 | 中国电建集团华东勘测设计研究院有限公司 | Slow-dip-angle weak structural surface penetration deformation field test method after grouting and sample device thereof |
| CN110907334B (en) * | 2019-12-17 | 2022-06-03 | 中国石油大学(华东) | Device and method for measuring radial flow oil-water relative permeability of conglomerate full-diameter core |
| CN111307685B (en) * | 2020-01-16 | 2022-08-02 | 中国石油大学(华东) | Device and method for testing displacement, steady state and transient permeability of low-permeability rock |
| JP2021116520A (en) * | 2020-01-21 | 2021-08-10 | Ｅ＆Ｐ国際商事株式会社 | Durability evaluation method and apparatus of improvement body or porous rock in fluid permeation condition |
| CN111504856B (en) * | 2020-04-27 | 2023-05-09 | 山东科技大学 | Rock mass fracture gas-liquid two-phase seepage experimental device and method |
| CN213933494U (en) * | 2020-07-13 | 2021-08-10 | 中国科学院武汉岩土力学研究所 | Saline-fresh water alternating constant head infiltration device |
| CN112858020A (en) * | 2021-01-14 | 2021-05-28 | 中国石油大学(北京) | Rock triaxial confining pressure loading and seepage test device and method |
| CN113533337B (en) * | 2021-07-19 | 2023-11-03 | 中国石油大学(华东) | Method and device for determining generation and collapse speeds of foam seepage bubbles of oil reservoir |
-
2021
- 2021-11-16 CN CN202111652477.4A patent/CN114486701B/en active Active
- 2021-11-16 CN CN202111351982.5A patent/CN113791027B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004019029A1 (en) * | 2002-08-23 | 2004-03-04 | Norsk Hydro Asa | Device and method for petrophysical analysis of a rock sample |
| WO2018129920A1 (en) * | 2017-01-12 | 2018-07-19 | 四川大学 | Sample component for radial permeability test of rock having extra-low permeability and test method therefor |
| CN109211757A (en) * | 2018-11-05 | 2019-01-15 | 长安大学 | A kind of In Rock Seepage Tests device and its test method |
| CN109612907A (en) * | 2018-12-27 | 2019-04-12 | 太原理工大学 | Fractured coal and rock testing permeability experimental rig and method |
| US20200249182A1 (en) * | 2019-01-31 | 2020-08-06 | King Fahd University Of Petroleum And Minerals | Method and apparatus for measuring capillary pressure and foam transport in porous media |
| WO2021003996A1 (en) * | 2019-07-05 | 2021-01-14 | 中国矿业大学 | Experimentation apparatus and method utilizing x-ray for measuring content and distribution of water in coal rock |
| CN110530784A (en) * | 2019-08-22 | 2019-12-03 | 河南工程学院 | Simulate the soak test device and method of corrosivity pressure water environment |
| CN110887775A (en) * | 2019-12-02 | 2020-03-17 | 西安科技大学 | System and method for testing permeability of triaxial slurry of post-peak fractured rock |
| CN112782000A (en) * | 2021-01-28 | 2021-05-11 | 中国矿业大学 | Testing device and method for high-pressure mine water-rock (coal) coupling effect |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115683794A (en) * | 2023-01-05 | 2023-02-03 | 华北科技学院(中国煤矿安全技术培训中心) | Rock sample long-term etching device, system and method in triaxial environment |
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| CN113791027B (en) | 2022-02-08 |
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