CN-122016516-A - Ultra-wide temperature range three-field coupling rock shear rheological test device and method

CN122016516ACN 122016516 ACN122016516 ACN 122016516ACN-122016516-A

Abstract

The invention discloses an ultra-wide temperature range three-field coupling rock shear rheological test device and method, wherein the device comprises a split shear box assembly, a quick-connection fluid temperature control jacket, a rigidity servo loading system, a seepage and dynamic sealing system, an intelligent synchronous control system and an external temperature control unit; the method comprises the steps of installing a rock sample, applying temperature, seepage and load through each system respectively or in a coupling way, and controlling the multi-field coupling action process by the intelligent synchronous control system to study the shear rheological property of the rock under a complex environment. The invention can effectively simulate the three-field coupling effect of temperature-seepage-stress under ultra-wide temperature range, and provides a key technical means for the stability research of deep engineering rock mass.

Inventors

JIANG ANNAN
CHE ZHAOLIN
Nie Shengze
LIU LINLIN
WAN YOUSHENG
Shan Shengbiao
MIN QINGHUA
ZHENG FU
ZHANG HAOYANG
ZHANG HAIKUN
LI MINGYU

Assignees

大连海事大学

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (8)

1. The ultra-wide temperature domain three-field coupling rock shear rheological test device is characterized by comprising a split shear box assembly (1), a quick-connection fluid temperature control jacket (2), a rigidity servo loading system (3), a seepage and dynamic sealing system (4), an intelligent synchronous control system (5) and an external temperature control unit (6); Rock samples are arranged in the split shear box assembly (1); The split type shear box assembly (1) is connected with the quick-connection fluid temperature control jacket (2); The external temperature control unit (6) is connected with the quick-connection fluid temperature control jacket (2) and is used for providing a temperature within a set temperature range for a rock sample through the quick-connection fluid temperature control jacket (2); The rigidity servo loading system (3) is connected with the split shear box assembly (1) and is used for applying normal load and shear load to a rock sample arranged in the split shear box assembly (1); the seepage and dynamic sealing system (4) is connected with the split shear box assembly (1) and is used for applying seepage water pressure and air pressure to the rock sample; The intelligent synchronous control system (5) is in signal connection with an external temperature control unit (6), the rigidity servo loading system (3) and the seepage and dynamic sealing system (4).
2. The ultra-wide temperature range three-field coupling rock shear rheological test device according to claim 1, wherein the external temperature control unit (6) comprises a high-temperature silicone oil storage tank (601), a high-temperature circulating pump (603), a high-temperature circulating oil supply pipeline (605), a high-temperature circulating oil return pipeline (606), an ethylene glycol solution storage tank (610), a low-temperature circulating pump (612), a low-temperature circulating water supply pipeline (614) and a low-temperature circulating water return pipeline (615); an invasive electric heater (602) is arranged in the high-temperature silicone oil storage tank (601), and a heating controller (604), a high-temperature silicone oil outlet (607), a high-temperature silicone oil inlet (608) and a high-temperature circulating pump interface (609) are arranged on the outer wall of the high-temperature silicone oil storage tank; The heating controller (604) is respectively in communication connection with the intelligent synchronous control system (5) and the invasive electric heater (602); The high-temperature silicone oil storage tank (601) is connected with one end of a high-temperature circulating oil supply pipeline (605) through a high-temperature silicone oil outlet (607), one end of a high-temperature circulating oil return pipeline (606) through a high-temperature silicone oil inlet (608) and a high-temperature circulating pump (603) through a high-temperature circulating pump interface (609); The other ends of the high-temperature circulating oil supply pipeline (605) and the high-temperature circulating oil return pipeline (606) are respectively provided with a first hydraulic quick-change joint male connector (619) and a second hydraulic quick-change joint male connector (620); A compression refrigeration system (611) is arranged in the ethylene glycol solution storage tank (610), and a refrigeration controller (613), an ethylene glycol solution outlet (616), an ethylene glycol solution inlet (617) and a low-temperature circulating pump interface (618) are arranged on the outer wall of the ethylene glycol solution storage tank; The refrigeration controller (613) is respectively in communication connection with the intelligent synchronous control system (5) and the compression refrigeration system (611); The ethylene glycol solution storage tank (610) is connected with one end of a low-temperature circulating water supply pipeline (614) through an ethylene glycol solution outlet (616), one end of a low-temperature circulating water return pipeline (615) through an ethylene glycol solution inlet (617) and a low-temperature circulating pump (612) through a low-temperature circulating pump interface (618); The other ends of the low-temperature circulating water supply pipeline (614) and the low-temperature circulating water return pipeline (615) are respectively provided with a third hydraulic quick-change connector male head (621) and a fourth hydraulic quick-change connector male head (622); The first hydraulic quick-change connector male connector (619), the second hydraulic quick-change connector male connector (620), the third hydraulic quick-change connector male connector (621) and the fourth hydraulic quick-change connector male connector (622) are connected with the quick-connection fluid temperature control jacket (2).
3. The ultra-wide temperature range three-field coupling rock shear rheological test device according to claim 2, wherein the high-temperature silicone oil storage tank (601) is used for storing silicone oil, and the heating controller (604) is used for controlling the invasive electric heater (602) to heat the silicone oil so as to adjust the temperature of the silicone oil between room temperature and 300 ℃; The ethylene glycol solution storage tank (610) is used for storing an ethylene glycol aqueous solution, and the compression refrigeration system (611) is controlled by the refrigeration controller (613) to refrigerate the ethylene glycol aqueous solution, so that the temperature of the ethylene glycol aqueous solution is adjusted between room temperature and-40 ℃.
4. The ultra-wide temperature range three-field coupled rock shear rheological test device according to claim 2, wherein the fast fluid temperature control jacket (2) comprises a surrounding shell (201), a hot serpentine fluid flow channel (202), a cold serpentine fluid flow channel (203), a locking mechanism (204) and a device frame (205); the surrounding housing (201) comprises a first side plate, a second side plate and a top plate (2015); The first side panel comprises a first splice plate (2011) and a second splice plate (2012); The second side plate comprises a third splice plate (2013) and a fourth splice plate (2014); The two ends of the top plate (2015) are respectively and vertically fixed with the top end of the first splice plate (2011) and the top end of the third splice plate (2013), and the second splice plate (2012) and the fourth splice plate (2014) are arranged on one side of the top plate (2015); the hot serpentine fluid flow passage (202) is sequentially arranged on one side of the split type shearing box assembly (1) which is provided with the second splice plate (2012), the first splice plate (2011), the top plate (2015), the third splice plate (2013) and the fourth splice plate (2014), and two ends of the hot serpentine fluid flow passage (202) are respectively connected with the first hydraulic quick-change joint female head (207) and the second hydraulic quick-change joint female head (208); The cold serpentine fluid flow passage (203) is sequentially arranged on one side of the split type shearing box assembly (1) which is provided with the second splice plate (2012), the first splice plate (2011), the top plate (2015), the third splice plate (2013) and the fourth splice plate (2014), and two ends of the cold serpentine fluid flow passage (203) are respectively connected with the third hydraulic quick-change joint female head (209) and the fourth hydraulic quick-change joint female head (210); A temperature display (206) is arranged on one side of the top plate (2015) far away from the split type shear box assembly (1); The first hydraulic quick-change connector female connector (207) is connected with the first hydraulic quick-change connector male connector (619), the second hydraulic quick-change connector female connector (208) is connected with the second hydraulic quick-change connector male connector (620), the third hydraulic quick-change connector female connector (209) is connected with the third hydraulic quick-change connector male connector (621), and the fourth hydraulic quick-change connector female connector (210) is connected with the fourth hydraulic quick-change connector male connector (622); the locking mechanism (204) is arranged on a side wall surface of the second splice plate (2012) and the fourth splice plate (2014) far away from the split type shear box assembly (1); The device rack (205) is detachably connected with the second splice plate (2012) and the fourth splice plate (2014) through a locking mechanism (204); the device frame (205) is fixedly arranged on the test bed.
5. The ultra-wide temperature range three-field coupled rock shear rheological test device according to claim 4, wherein the split shear box assembly (1) comprises an upper shear box (101), a lower shear box (102), a flexible metal sealing assembly (105) and a hollow air bag (106); The bottom of the upper shear box (101) is provided with a first groove (103) for accommodating a rock sample, and the top of the lower shear box (102) is provided with a second groove (104) for accommodating the rock sample; when the bottom surface of the upper shearing box (101) is abutted with the top surface of the lower shearing box (102), the first groove (103) and the second groove (104) jointly form a containing cavity for containing a rock sample; The top of the upper shear box (101) is connected with a rigidity servo loading system (3) so as to apply a normal load in a vertical downward direction to a rock sample; the stiffness servo loading system (3) is respectively connected with a first side wall (111) of the upper shear box (101) and a second side wall (112) of the lower shear box (102) so as to respectively apply shear loads which are opposite in direction and perpendicular to normal loads to rock samples; Hollow air bags (106) which are in contact with the rock sample are arranged between the rock sample and the side wall of the upper shear box (101) perpendicular to the shear load and between the rock sample and the side wall of the lower shear box (102) perpendicular to the shear load; The rock sample and the upper shear box (101) are provided with a first annular reserved groove (109) for accommodating the hollow air bag (106) on the side wall surface perpendicular to the shear load, and the rock sample and the lower shear box (102) are provided with a second annular reserved groove (110) for accommodating the hollow air bag (106) on the side wall surface perpendicular to the shear load; The upper shearing box (101) and the lower shearing box (102) are respectively provided with a seepage outlet (108) and a seepage inlet (107), and the seepage outlet (108) and the seepage inlet (107) are connected with a seepage and dynamic sealing system (4); the flexible metal sealing assembly (105) is arranged between the rock sample and the hollow air bag (106), and the hollow air bag (106) can enable the flexible metal sealing assembly (105) to be in close contact with the rock sample after being inflated.
6. An ultra-wide temperature range three-field coupled rock shear rheology test device according to claim 5, characterized in that the stiffness servo loading system (3) comprises a normal loading unit (301), a first shear loading unit (302) and a second shear loading unit (303); the normal loading unit (301) is connected with the top of the upper shearing box (101) and is used for applying normal load in the vertical direction downwards; The first shear loading unit (302) is connected with the first side wall (111) of the upper shear box (101) and is used for applying a shear load in the horizontal direction; the second shear loading unit (303) is connected with the second side wall (112) of the lower shear box (102) and is used for applying a shear load in the horizontal direction; The first shear loading unit (302) and the second shear loading unit (303) are arranged on two sides of the split shear box assembly (1).
7. The ultra-wide temperature range three-field coupled rock shear rheological test device according to claim 5, wherein the seepage and dynamic sealing system (4) comprises a precise air pressure controller (401), a pressure-resistant air pipe (402), a high-pressure seepage pump (403), a water storage tank (404), a first high-pressure pipeline (405), a second high-pressure pipeline (406) and a return pipeline (407); The outer wall of the precise air pressure controller (401) is provided with an air pressure display (409), and is connected with a hollow air bag (106) of the split shear box assembly (1) through a pressure-resistant air pipe (402); The outer wall of the water storage tank (404) is provided with a high-pressure water outlet (410), a backflow water inlet (411) and a capacity display (408), and is connected with one end of a first high-pressure pipeline (405) through the high-pressure water outlet (410) and one end of a backflow pipeline (407) through the backflow water inlet (411); The high-pressure seepage pump (403) is provided with an inlet (412) and an outlet (413), is connected with the other end of the first high-pressure pipeline (405) through the inlet (412), and is connected with one end of the second high-pressure pipeline (406) through the outlet (413); the other end of the second high-pressure pipeline (406) is connected with the seepage inlet (107); The other end of the return pipeline (407) is connected with a seepage outlet (108); and the precise air pressure controller (401) and the high-pressure seepage pump (403) are respectively in communication connection with the intelligent synchronous control system (5).
8. A testing method based on the ultra-wide temperature range three-field coupling rock shear rheological testing device according to any one of claims 1 to 7, comprising: S1, placing a rock sample in a lower shear box, and arranging a flexible metal sealing assembly between the rock sample and a hollow air bag; S2, placing the split type shear box assembly in the quick-connection fluid temperature control jacket so that the outer wall surface of the split type shear box assembly is tightly attached to the inner wall of the quick-connection fluid temperature control jacket; s3, inflating a hollow air bag in the split shear box assembly through a seepage and dynamic sealing system to expand the hollow air bag and tightly attach a flexible metal sealing assembly to the surface of a rock sample, so that a seepage channel is formed in the annular reserved groove; s4, pumping a temperature control medium to a hot serpentine fluid flow passage or a cold serpentine fluid flow passage which is quickly connected with a fluid temperature control jacket through an external temperature control unit so as to apply a temperature field to the rock sample; s5, injecting seepage liquid into the seepage channel through the seepage and dynamic sealing system so as to establish a seepage field with constant seepage speed; S6, synchronously or stepwise applying normal load and shear load to the rock sample through a rigidity servo loading system so as to perform compression or shear test; S7, synchronously executing at least two steps from S4 to S6 or according to a preset time sequence through a preset coupling test mode in the intelligent synchronous control system so as to realize a multi-field coupling test, and simultaneously collecting test data of an external temperature control unit, a seepage and dynamic sealing system and a rigidity servo loading system for analyzing the change of the rock under the action of multi-field coupling.

Description

Ultra-wide temperature range three-field coupling rock shear rheological test device and method Technical Field The invention relates to the technical field of rock engineering test equipment, in particular to an ultra-wide temperature range three-field coupling rock shear rheological test device and method. Background In major projects such as deep resource exploitation, high nuclear waste geological disposal, alpine region and geothermal development, the occurence rock mass is in a multi-field coupled extremely complex environment such as high temperature, high osmotic pressure, high ground stress or freeze thawing cycle for a long time. The long-term strength, deformation and cracking behavior of the composite material are nonlinear response results of the combined action of multiple physical fields, and the true catastrophe mechanism of the composite material cannot be revealed by only researching the coupling action of a single field or two fields. The traditional rock mechanical test equipment has remarkable bottleneck in simulating such complex environments, the traditional rheometer has wide temperature range control capability, but the core design aims at homogeneous materials such as polymers, high normal stress and seepage pressure cannot be applied to rock samples containing cracks and heterogeneity, the traditional rock triaxial or direct shear instrument also has a coupling field in operation, the matched temperature control system has narrow temperature control range and poor temperature control precision and uniformity, is difficult to realize structural compatibility and synchronous control with a shearing and seepage system, cannot meet the complete simulation requirement from deep high temperature to surface freeze thawing, and under the combined action of temperature alternation, seepage and shearing load for a long time, the traditional rubber sealing element is easy to age and lose efficacy, and complicated temperature control pipelines and valves integrated on a shear box are more potential leakage points and maintenance difficulties, so that the equipment is difficult to stably operate for a plurality of weeks or even months of complex time sequence coupling tests. Disclosure of Invention The invention provides an ultra-wide temperature range three-field coupling rock shear rheological test device and method, which are used for solving the problems that a temperature control system obtained by a traditional test device is narrow in temperature control range, poor in temperature control precision and uniformity, and difficult to realize structural compatibility and synchronous control with a shear and seepage system. In order to achieve the above object, the technical scheme of the present invention is as follows: An ultra-wide temperature domain three-field coupling rock shear rheological test device comprises a split shear box assembly, a quick-connection fluid temperature control jacket, a rigidity servo loading system, a seepage and dynamic sealing system, an intelligent synchronous control system and an external temperature control unit; Rock samples are arranged in the split shear box assembly; The split type shear box assembly is connected with the quick-connection fluid temperature control jacket; the external temperature control unit is connected with the quick-connection fluid temperature control jacket and is used for providing the temperature within a set temperature range for the rock sample through the quick-connection fluid temperature control jacket; The rigidity servo loading system is connected with the split shear box assembly and is used for applying normal load and shear load to the rock sample arranged in the split shear box assembly; the seepage and dynamic sealing system is connected with the split shear box assembly and is used for applying seepage water pressure and air pressure to the rock sample; the intelligent synchronous control system is in signal connection with an external temperature control unit, a rigidity servo loading system and a seepage and dynamic sealing system. Further, the external temperature control unit comprises a high-temperature silicone oil storage tank, a high-temperature circulating pump, a high-temperature circulating oil supply pipeline, a high-temperature circulating oil return pipeline, an ethylene glycol solution storage tank, a low-temperature circulating pump, a low-temperature circulating water supply pipeline and a low-temperature circulating water return pipeline; An invasive electric heater is arranged in the high-temperature silicone oil storage tank, and a heating controller, a high-temperature silicone oil outlet, a high-temperature silicone oil inlet and a high-temperature circulating pump interface are arranged on the outer wall of the high-temperature silicone oil storage tank; The heating controller is respectively in communication connection with the intelligent synchronous control system and the invasive electri