CN103954499A - Rock confining pressure loading experiment device and experiment method - Google Patents
Rock confining pressure loading experiment device and experiment method Download PDFInfo
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- CN103954499A CN103954499A CN201410080149.5A CN201410080149A CN103954499A CN 103954499 A CN103954499 A CN 103954499A CN 201410080149 A CN201410080149 A CN 201410080149A CN 103954499 A CN103954499 A CN 103954499A
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Abstract
The invention relates to a rock confining pressure loading experiment device and experiment method; the experiment device comprises a box enclosed by a front side steel plate, a left side steel plate, a rear side steel plate, a right side steel plate, a lower bottom steel plate and an upper cover steel plate; a plurality of guide holes and a plurality of threaded holes distributed in an array respectively run through the front side steel plate, the left side steel plate and the upper cover steel plate, pressurization inner plate guide bolts penetrates to the guide holes, prestressed bolts are arranged in the threaded holes, the pressurization inner plate guide bolts are fixedly connected with a pressurization inner plate, and the pressurization inner plate abuts the bottom end of the prestressed bolts. The rock confining pressure loading experiment device solves the problems that devices in the prior art are complicated in structure, high in cost, and not suitable for loading experiments for smaller stress.
Description
Technical field
The present invention relates to confined pressure charger, specifically a kind of rock confined pressure loading experimental apparatus and experimental technique.
Background technology
Rock Mechanics Test And analogue technique is to simulate part engineering structure in Geotechnical Engineering to study, the subject material of simulation is mainly rock mass, its conventionally adopts scale down or in particular cases by the ratio of amplifying, carrys out analogue formation at certain, then by the Changing Pattern of stress-strain and the Changing Pattern of structure that occur in the prototype (simulation entity) that variation judges and understanding is simulated that the observation of model upper stress, strain and rock mass structure are occurred.Rock Mechanics Test And analogue technique is to take similarity theory as basis, in the middle of simulation process, by dwindling the ratio etc. of simulation entity and suffered stress gravity, simulates rock mass suffered true stress situation at the scene.
Based on the above, want to reach the final purpose of rock simulated experiment, first to there be correctly equipment and the device of Reality simulation stress condition.Rock confined pressure experiment charger can solve by the conversion of similarity theory the suffered corresponding stress of model, and then the rock mass deformation under Reality simulation terrestrial stress destroys situation.Normal triaxial pressure test has been studied the impact of confined pressure on rock deformation and destruction, and it has adopted triaxial stress loading experimental apparatus.Yet current triaxial stress loading experimental apparatus is still tending towards maximizing, and structure is comparatively complicated, the waste that has therefore brought great inconvenience and resource to experiment.
As the disclosed a kind of three-dimensional rigidity of CN 203117046 U loads rock true triaxil tester, this triaxial apparatus comprises triaxial pressure box, true three axle rock sample overcoats and servo rigid pressurized system.Under the effect of servo rigid pressurized system, the piston rod of pressure cylinder drives increased pressure board to move by pressurization cushion block, and pressure is added on sample equably by cube Stiff Block.The object of this triaxial apparatus is by hard and soft mixing pressurization lamellar body is set, and guarantees that sample mixes the corresponding compression simultaneously of pressurization lamellar body with hard and soft, thereby the internal face of increased pressure board is remained at grade with the hard and soft lateral surface that mixes the lamellar body that pressurizes.The source of exerting pressure of this triaxial apparatus is servo rigid pressurized system, and servo rigid pressurized system is comprised of pressure cylinder, motor etc. conventionally, as everyone knows, control the accuracy of motor output, difficulty is larger, this makes this triaxial apparatus when applying less force value, and accuracy is difficult to guarantee, is therefore not suitable for small size sample to apply the situation of less force value; In addition, this servo rigid pressurized system also makes the structure complexity of this triaxial apparatus increase, and cost rises, and volume is larger, also inapplicable for the situation that experimental situation is limited.Except this, also there is similar problem in the true three axle simulation experiment systems of the disclosed rock burst of CN 103471914 A.
Summary of the invention
The object of the present invention is to provide a kind of rock confined pressure loading experimental apparatus, it is simple in structure, and the accurate stress state of simulation rock under true three-dimensional terrestrial stress condition can be simplified the loading equipemtn of confined pressure; Can solve existing apparatus complex structure, cost is high, is not suitable for the problem of the loading experiment of less stress.
Technical scheme of the present invention is as follows:
A kind of rock confined pressure loading experimental apparatus, comprise the casing being surrounded by front side steel plate, left side steel plate, rear side steel plate, right side steel plate, go to the bottom steel plate and upper cover steel plate, described front side steel plate, left side steel plate, rear side steel plate and right side steel plate are fixed on goes to the bottom on steel plate, on described front side steel plate, left side steel plate and upper cover steel plate, be penetrated with separately several pilot holes and several threaded hole that is array distribution, in described pilot hole, penetrated pressurization inner panel guide blot, in described threaded hole, pre-stressed bolt has been installed;
In the inner side of described front side steel plate, be provided with parallel with front side steel plate rear to pressurization inner panel, described backward pressurization inner panel be fixedly connected with the bottom of the inner panel guide blot that pressurizes on the steel plate of front side above and with front side steel plate on the bottom of pre-stressed bolt offset;
In the inner side of described left side steel plate, be provided with the dextrad parallel with left side steel plate pressurization inner panel, the described dextrad pressurization left side of inner panel and the bottom of the inner panel guide blot that pressurizes on the steel plate of left side is fixedly connected with and with left side steel plate on the bottom of pre-stressed bolt offset;
In the inner side of described upper cover steel plate, be provided with parallel with upper cover steel plate lower to pressurization inner panel, described lower above pressurization inner panel, be fixedly connected with the bottom of the inner panel guide blot that pressurizes on upper cover steel plate and with upper cover steel plate on the bottom of pre-stressed bolt offset;
The surrounding of described upper cover steel plate is protruding with cover rim down, described cover rim covers in the outside of front side steel plate, left side steel plate, rear side steel plate and right side steel plate, and described cover rim is detachable pin with front side steel plate, left side steel plate, rear side steel plate and right side steel plate and is connected.
Rock sample is placed in the steel plate of going to the bottom in this experimental provision casing, by pre-stressed bolt is applied to moment, make pre-stressed bolt to the backward pressurization inner panel in casing, dextrad pressurization inner panel and lower to the three pressurization inner panels pressurization of pressurization inner panel and then to rock sample generation imposed stress.Because the stress loading of casing in three directions is separate and is independent of each other, so the stress combination under can Reality simulation triaxiality condition; In addition, applying moment can realize by torque spanner, torque spanner applied force square changes into the perpendicular stress of bolt to pressurization inner panel, then be applied on rock sample, pre-stressed bolt converts by torque spanner applied force square to the large I of pressurization inner panel stress application, controls and is applied to the stress on rock sample thus.
Several threaded hole correspondences that are array distribution pressurization inner panel separately distributes, to guarantee that pre-stressed bolt is evenly distributed to the extruding force of pressurization inner panel, the acting force that the inner panel that pressurizes is applied on rock sample is even, regulates each pre-stressed bolt to guarantee stationarity and the homogeneity of institute's stress application.Pressurization inner panel guide blot, for the location of the inner panel that pressurizes, play the guiding role in vertical direction and horizontal direction to pressurization inner panel.Cover rim is connected with the detachable pin of box body wall, facilitates picking and placeing of rock sample.
Further, for guaranteeing that pressurization inner panel can be to the rock sample application of force, the movable distance of described backward pressurization inner panel in described casing is greater than front side steel plate to the distance of dextrad pressurization inner panel; The movable distance of described dextrad pressurization inner panel in described casing is greater than left side steel plate to the rear distance to pressurization inner panel; Describedly to the movable distance of pressurization inner panel in described casing, be greater than upper cover steel plate to dextrad pressurize inner panel, rear small distance in pressurization inner panel down.
Further, intensity for guard box body wall, described front side steel plate, left side steel plate, rear side steel plate, right side steel plate, the steel plate of going to the bottom, backward pressurization inner panel, dextrad pressurization inner panel and be square carbon steel plate to pressurization inner panel down, described front side steel plate, left side steel plate, the base of rear side steel plate and right side steel plate is groove seamless welding with the side of the steel plate of going to the bottom, the left side of described front side steel plate and the front of left side steel plate, the back of steel plate, left side and the left side of rear side steel plate, the back of the right of rear side steel plate and right side steel plate, the right of the front of right side steel plate and front side steel plate is groove seamless welding.
Meanwhile, it is a kind of simple to operate and be applicable to the method for the rock confined pressure loading experiment of less stress that the present invention also provides, and the method comprises the following steps:
The first step, builds the needed rock sample of experiment according to requirement of experiment, and sample dimensions is mated with the size of described rock confined pressure loading experimental apparatus;
Second step, is placed on a steady and spacious place by rock confined pressure loading experimental apparatus, and backward pressurization inner panel and dextrad pressurization inner panel are connected in casing by pressurization inner panel guide blot respectively;
The 3rd step, rock sample is placed into going to the bottom on steel plate of casing, rock sample contacts with dextrad pressurization inner panel completely with backward pressurization inner panel, by pre-stressed bolt, backward pressurization inner panel and dextrad pressurization inner panel is applied to a small amount of acting force, rock sample is gently pressed in to the right back corner of casing;
The 4th step, is connected on upper cover steel plate by pressurization inner panel guide blot to pressurization inner panel lower, and the cover rim of upper cover steel plate is connected anchoring with wall box;
The 5th step, all installs the pre-stressed bolt on casing, first by common wrench, pre-stressed bolt is carried out to pretension until bolt bottom arrives to pressurization inner panel;
The 6th step, three identical torque spanners are adjusted to the moment that applies having converted, locking, pre-stressed bolt to three directions on front side steel plate, left side steel plate, upper cover steel plate synchronously applies moment by amount, first four angle loading stresses to each pressurization inner panel then synchronously load remaining pre-stressed bolt in three directions;
The 7th step, after confined pressure loaded, repeats to load until do not have creep to produce to rock sample for the first time.
The confined pressure loading experimental apparatus of this programme and experimental technique are particularly useful for the simulated experiment of indoor small-sized confined pressure rock mechanics, not only can accurately simulate the stress state under true three-dimensional terrestrial stress condition, and can simplify loading equipemtn and the method operation of confined pressure, reduce costs.By the simplification loading is simulated, obtain the architectural characteristic under rock true three-dimension stress.Therefore at the aspects such as scale that improve simulated experiment precision and dwindle simulated experiment, be significant.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is cross sectional view of the present invention;
Fig. 3 is cut-away section structural drawing of the present invention;
Fig. 4 is the schematic diagram of upper cover steel plate of the present invention;
Fig. 5 is the pressurize schematic diagram of inner panel of the present invention.
Description of reference numerals: 1-front side steel plate; 2-left side steel plate; 3-rear side steel plate; 4-right side steel plate; The 5-steel plate of going to the bottom; 6-upper cover steel plate; 8-pressurization inner panel guide blot; 9-pilot hole; 10-threaded hole; 11-connects pin-and-hole; 12-pre-stressed bolt; 61-cover rim; The backward pressurization inner panel of 71-; 72-dextrad pressurization inner panel; Under 76-to pressurization inner panel.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
See a kind of rock confined pressure loading experimental apparatus shown in Fig. 1 ~ 5, comprise the casing being surrounded by front side steel plate 1, left side steel plate 2, rear side steel plate 3, right side steel plate 4, go to the bottom steel plate 5 and upper cover steel plate 6, described front side steel plate 1, left side steel plate 2, rear side steel plate 3 and right side steel plate 4 are fixed on goes to the bottom on steel plate 5, on described front side steel plate 1, left side steel plate 2 and upper cover steel plate 6, be penetrated with separately several pilot holes 9 and several threaded hole 10 that is array distribution, in described pilot hole 9, penetrated pressurization inner panel guide blot 8, in described threaded hole 10, pre-stressed bolt 12 has been installed;
In the inner side of described front side steel plate 1, be provided with parallel with front side steel plate 1 rear to pressurization inner panel 71, described backward pressurization inner panel 71 be fixedly connected with the bottom of the inner panel guide blot 8 that pressurizes on front side steel plate 1 above and with front side steel plate 1 on the bottom of pre-stressed bolt 12 offset;
In the inner side of described left side steel plate 2, be provided with the dextrad parallel with left side steel plate 2 pressurization inner panel 72, the described dextrad pressurization left side of inner panel 72 and the bottom of the inner panel guide blot 8 that pressurizes on left side steel plate 2 is fixedly connected with and with left side steel plate 2 on the bottom of pre-stressed bolt 12 offset;
In the inner side of described upper cover steel plate 6, be provided with parallel with upper cover steel plate 6 lower to pressurization inner panel 76, described lower above pressurization inner panel 76, be fixedly connected with the bottom of the inner panel guide blot 8 that pressurizes on upper cover steel plate 6 and with upper cover steel plate 6 on the bottom of pre-stressed bolt 12 offset;
The surrounding of described upper cover steel plate 6 is protruding with cover rim 61 down, described cover rim 61 covers in the outside of front side steel plate 1, left side steel plate 2, rear side steel plate 3 and right side steel plate 4, and described cover rim 61 is detachable pin with front side steel plate 1, left side steel plate 2, rear side steel plate 3 and right side steel plate 4 and is connected.
Rock sample is placed in the steel plate 5 of going to the bottom in this experimental provision casing, by pre-stressed bolt 12 is applied to moment, make backward pressurization inner panel 71, dextrad pressurization inner panel 72 and lower to the 76 3 pressurization inner panels pressurization of pressurization inner panel and then to rock sample generation imposed stress in 12 pairs of casings of pre-stressed bolt.Because the stress loading of casing in three directions is separate and is independent of each other, so the stress combination under can Reality simulation triaxiality condition; In addition, applying moment can realize by torque spanner, torque spanner applied force square changes into the perpendicular stress of bolt to pressurization inner panel, then be applied on rock sample, the large I of 12 pairs of pressurization inner panel stress applications of pre-stressed bolt converts by torque spanner applied force square, controls and is applied to the stress on rock sample thus.
Several threaded hole 10 correspondences that are array distribution pressurization inner panel separately distributes, to guarantee that the extruding force of 12 pairs of pressurization inner panels of pre-stressed bolt is evenly distributed, the acting force that the inner panel that pressurizes is applied on rock sample is even, regulates each pre-stressed bolt 12 to guarantee stationarity and the homogeneity of institute's stress application.Pressurization inner panel guide blot 8 location for the inner panel that pressurizes, play the guiding role in vertical direction and horizontal direction to pressurization inner panel.Cover rim 61 is connected with the detachable pin of box body wall, facilitates picking and placeing of rock sample.
Further, for guaranteeing that pressurization inner panel can be to the rock sample application of force, the movable distance of described backward pressurization inner panel 71 in described casing is greater than front side steel plate 1 to the distance of dextrad pressurization inner panel 72; The movable distance of described dextrad pressurization inner panel 72 in described casing is greater than left side steel plate 2 to the rear distance to pressurization inner panel 71; Describedly to the movable distance of pressurization inner panel 76 in described casing, be greater than upper cover steel plate 6 to dextrad pressurization inner panel 72, rear small distance in pressurization inner panel 71 down.
Intensity for guard box body wall, described front side steel plate 1, left side steel plate 2, rear side steel plate 3, right side steel plate 4, the steel plate 5 of going to the bottom, backward pressurization inner panel 71, dextrad pressurization inner panel 72 and be square carbon steel plate to pressurization inner panel 76 down, described front side steel plate 1, left side steel plate 2, the base of rear side steel plate 3 and right side steel plate 4 is groove seamless welding with the side of the steel plate 5 of going to the bottom, the left side of described front side steel plate 1 and the front of left side steel plate 2, the back of steel plate 2, left side and the left side of rear side steel plate 3, the back of the right of rear side steel plate 3 and right side steel plate 4, the right of the front of right side steel plate 4 and front side steel plate 1 is groove seamless welding.
During concrete making, first with screw, connect location, and then adopt groove seamless welding that steel plate is connected together, welding can guarantee casing accuracy of gauge, and weld firm.Post-weld annealed is to remove stress, and weld grinding is smooth.
For the simulated experiment of small indoor confined pressure rock mechanics, a kind of concrete size can be: the length in described casing is 370mm, the wall thickness of the wall thickness of described casing, cover rim 61 is 20mm, and the casing that the steel plate seamless welding that 20mm is thick forms has larger self-bearing capacity.
The height of described cover rim 61 is 30mm, on the every limit of described upper cover steel plate 6 cover rim 61, be provided with three and connect pin-and-hole 11, the top margin of corresponding casing also arranges three same connection pin-and-holes 11, in the connection pin-and-hole 11 of two correspondences, pin is set, be used for connecting upper cover steel plate 6 and wall box, the effect that perpendicular stress is provided and casing is sealed to be reached for rock sample.Upper cover steel plate 6 can adopt the normal carbon steel plate of 430mm * 430mm, and steel plate thickness is 50mm, and in upper cover steel plate 6 bottom surface central authorities, cutting away 390mm * 390mm is highly the rectangular parallelepiped piece of 30mm, forms cover rim 61, so that casing is sealed.It is the cylindrical positioning pins of M8 * 20 that pin can adopt specification, and the head of pin is drilled with the threaded hole of the dark M4 of 20mm, in order to inserting bolt, pin is dismantled.
Described backward pressurization inner panel 71, dextrad pressurization inner panel 72 and the lower length of side to pressurization inner panel 76 are 290mm, thickness is 15mm.Corresponding above-mentioned size, more suitable, the threaded hole 10 on described front side steel plate 1, left side steel plate 2 and upper cover steel plate 6 is all 4 * 4 array distribution that spacing is 60mm.Threaded hole 10 array center on described front side steel plate 1 are positioned at the right part below of front side steel plate 1 and corresponding with backward pressurization inner panel 71 center, threaded hole 10 array center on described left side steel plate 2 are positioned at the lower rear of left side steel plate 2 and corresponding with dextrad pressurization inner panel 72 center, and threaded hole 10 array center on described upper cover steel plate 6 are positioned at the right part rear of upper cover steel plate 6 and with lower corresponding to the inner panel 76 center of pressurizeing.The right back corner that during stress application, rock sample is urged to casing is spacing, avoids displacement; The center of pressurization inner panel is corresponding with the center of threaded hole 10 arrays, avoids rock sample application of force deflection.
Described pre-stressed bolt 12 for specification be the full tooth carbon element of the outer-hexagonal head bolt of M16 * 1.25 * 100mm.On described front side steel plate 1, left side steel plate 2 and upper cover steel plate 6, all having spacing is 110mm and two pilot holes 9 that are positioned at threaded hole 10 array center, described pilot hole 9 is 150mm apart from end height in casing, described pressurization inner panel guide blot 8 for specification be outer-hexagonal head half tooth bolt of M12 * 1.25 * 100mm, the reach of described pressurization inner panel guide blot 8 is 50mm.
Use this experimental provision specifically to carry out the step of confined pressure experiment as follows:
The first step, builds the needed rock sample of experiment according to requirement of experiment, and sample dimensions is mated with the size of described rock confined pressure loading experimental apparatus;
Second step, is placed on a steady and spacious place by rock confined pressure loading experimental apparatus, and backward pressurization inner panel 71 and dextrad pressurization inner panel 72 are connected in casing by pressurization inner panel guide blot 8 respectively;
The 3rd step, rock sample is placed into going to the bottom on steel plate 5 of casing, rock sample contacts to avoid stress to concentrate with backward pressurization inner panel 71 with dextrad pressurization inner panel 72 completely, by 12 pairs of backward pressurization inner panels 71 of pre-stressed bolt and dextrad pressurization inner panel 72, apply a small amount of acting force, rock sample is gently pressed in to the right back corner of casing;
The 4th step, is connected on upper cover steel plate 6 by pressurization inner panel guide blot 8 to pressurization inner panel 76 lower, and the cover rim 61 of upper cover steel plate 6 is connected anchoring with wall box, notes the direction that cover rim 61 and casing mesh;
The 5th step, all installs the pre-stressed bolt on casing 12, first by common wrench, pre-stressed bolt 12 is carried out to pretension until bolt bottom arrives to pressurization inner panel;
The 6th step, three identical torque spanners are adjusted to the moment that applies having converted, locking, pre-stressed bolt 12 to three directions on front side steel plate 1, left side steel plate 2, upper cover steel plate 6 synchronously applies moment by amount, first to each pressurization inner panel four angle loading stresses, then synchronous remaining pre-stressed bolt 12 that loads in three directions, prevents rock sample unbalance stress, and causes stress to concentrate the situation that affects experimental result;
The 7th step, because general rock sample can produce creep in loading procedure, therefore after confined pressure loaded for the first time, generation due to creep, still there is distortion in test specimen, therefore within a certain period of time, rock sample is repeated to load until do not have creep to produce.
The center of described upper cover steel plate 6 offers the through hole that a diameter is 20mm, the layout of pressure break pipe during in order to waterfrac treatment, to increase the applicability of this experimental provision, make its waterfrac treatment experiment that can be widely used in rock under triaxial compression test, simulates real three axle terrestrial stress conditions and coal and rock, coal body gas migration experiment under three-dimensional stress condition etc.
For preventing casing corrosion, the surface spraying of described casing has rust preventive coating.
The confined pressure loading experimental apparatus of this programme and test method are particularly useful for the simulated experiment of indoor small-sized confined pressure rock mechanics, not only can accurately simulate the stress state under true three-dimensional terrestrial stress condition, and can simplify loading equipemtn and the method operation of confined pressure, reduce costs.By the simplification loading is simulated, obtain the architectural characteristic under rock true three-dimension stress.Therefore at the aspects such as scale that improve simulated experiment precision and dwindle simulated experiment, be significant.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a rock confined pressure loading experimental apparatus, comprise by front side steel plate (1), left side steel plate (2), rear side steel plate (3), right side steel plate (4), the casing that steel plate (5) and upper cover steel plate (6) surround of going to the bottom, described front side steel plate (1), left side steel plate (2), rear side steel plate (3) and right side steel plate (4) are fixed on the steel plate of going to the bottom (5), it is characterized in that: at described front side steel plate (1), on left side steel plate (2) and upper cover steel plate (6), be penetrated with separately several pilot holes (9) and several threaded hole (10) that is array distribution, in described pilot hole (9), penetrated pressurization inner panel guide blot (8), pre-stressed bolt (12) is installed in described threaded hole (10),
In the inner side of described front side steel plate (1), be provided with the backward pressurization inner panel (71) parallel with front side steel plate (1), being fixedly connected with the bottom of front side steel plate (1) upper pressurization inner panel guide blot (8) above and offseting with the bottom of the upper pre-stressed bolt (12) of front side steel plate (1) of described backward pressurization inner panel (71);
In the inner side of described left side steel plate (2), be provided with the dextrad pressurization inner panel (72) parallel with left side steel plate (2), the left side of described dextrad pressurization inner panel (72) is fixedly connected with the bottom of left side steel plate (2) upper pressurization inner panel guide blot (8) and offsets with the bottom of the upper pre-stressed bolt (12) of left side steel plate (2);
In the inner side of described upper cover steel plate (6), be provided with parallel with upper cover steel plate (6) lower to pressurization inner panel (76), described lower being fixedly connected with the bottom of upper cover steel plate (6) upper pressurization inner panel guide blot (8) above and above offseting the bottom of pre-stressed bolt (12) with upper cover steel plate (6) to pressurization inner panel (76);
The surrounding of described upper cover steel plate (6) is protruding with cover rim (61) down, described cover rim (61) covers in the outside of front side steel plate (1), left side steel plate (2), rear side steel plate (3) and right side steel plate (4), and described cover rim (61) is detachable pin with front side steel plate (1), left side steel plate (2), rear side steel plate (3) with right side steel plate (4) and is connected.
2. a kind of rock confined pressure loading experimental apparatus according to claim 1, is characterized in that: the movable distance of described backward pressurization inner panel (71) in described casing is greater than front side steel plate (1) to the distance of dextrad pressurization inner panel (72); The movable distance of described dextrad pressurization inner panel (72) in described casing is greater than left side steel plate (2) to the distance of backward pressurization inner panel (71); Describedly to the movable distance of pressurization inner panel (76) in described casing, be greater than upper cover steel plate (6) to the small distance in dextrad pressurization inner panel (72), backward pressurization inner panel (71) down.
3. a kind of rock confined pressure loading experimental apparatus according to claim 1 and 2, it is characterized in that: described front side steel plate (1), left side steel plate (2), rear side steel plate (3), right side steel plate (4), the steel plate (5) of going to the bottom, backward pressurization inner panel (71), dextrad pressurization inner panel (72) and be square carbon steel plate to the inner panel (76) that pressurizes down, described front side steel plate (1), left side steel plate (2), the base of rear side steel plate (3) and right side steel plate (4) is groove seamless welding with the side of the steel plate (5) of going to the bottom, the front of the left side of described front side steel plate (1) and left side steel plate (2), the back of left side steel plate (2) and the left side of rear side steel plate (3), the back of the right of rear side steel plate (3) and right side steel plate (4), the right of the front of right side steel plate (4) and front side steel plate (1) is groove seamless welding.
4. a kind of rock confined pressure loading experimental apparatus according to claim 3, it is characterized in that: the length in described casing is 370mm, described backward pressurization inner panel (71), dextrad pressurization inner panel (72) and the lower length of side to the inner panel (76) that pressurizes are 290mm, thickness is 15mm, the wall thickness of the wall thickness of described casing, cover rim (61) is 20mm, the height of described cover rim (61) is 30mm, is provided with three and connects pin-and-hole (11) on described upper cover steel plate (6) every limit cover rim (61);
Described front side steel plate (1), threaded hole (10) on left side steel plate (2) and upper cover steel plate (6) is all 4 * 4 array distribution that spacing is 60mm, threaded hole (10) array center on described front side steel plate (1) is positioned at the right part below of front side steel plate (1) and corresponding with the center of backward pressurization inner panel (71), the lower rear of steel plate (2) and corresponding with the center of dextrad pressurization inner panel (72) on the left of threaded hole (10) array center on described left side steel plate (2) is positioned at, threaded hole (10) array center on described upper cover steel plate (6) be positioned at upper cover steel plate (6) right part rear and with lower to pressurization inner panel (76) center corresponding, described pre-stressed bolt (12) for specification be the full tooth carbon element of the outer-hexagonal head bolt of M16 * 1.25 * 100mm,
On described front side steel plate (1), left side steel plate (2) and upper cover steel plate (6), all having spacing is 110mm and two pilot holes (9) that are positioned at threaded hole (10) array center, described pilot hole (9) is 150mm apart from end height in casing, described pressurization inner panel guide blot (8) for specification be outer-hexagonal head half tooth bolt of M12 * 1.25 * 100mm, the reach of described pressurization inner panel guide blot (8) is 50mm.
5. according to a kind of rock confined pressure loading experimental apparatus described in any one in claim 1 or 2 or 4, it is characterized in that: the center of described upper cover steel plate (6) offers the through hole that a diameter is 20mm.
6. according to a kind of rock confined pressure loading experimental apparatus described in any one in claim 1 or 2 or 4, it is characterized in that: the surface spraying of described casing has rust preventive coating.
7. utilize rock confined pressure loading experimental apparatus described in any one of claim 1-6 to carry out a method for rock confined pressure loading experiment, it is characterized in that the method comprises the steps:
The first step, builds the needed rock sample of experiment according to requirement of experiment, and sample dimensions is mated with the size of described rock confined pressure loading experimental apparatus;
Second step, is placed on a steady and spacious place by rock confined pressure loading experimental apparatus, and backward pressurization inner panel (71) and dextrad pressurization inner panel (72) are connected in casing by pressurization inner panel guide blot (8) respectively;
The 3rd step, rock sample is placed on the steel plate of going to the bottom (5) of casing, rock sample contacts with dextrad pressurization inner panel (72) completely with backward pressurization inner panel (71), by pre-stressed bolt (12), backward pressurization inner panel (71) and dextrad pressurization inner panel (72) are applied to a small amount of acting force, rock sample is gently pressed in to the right back corner of casing;
The 4th step, is connected to upper cover steel plate (6) above to pressurization inner panel (76) by pressurization inner panel guide blot (8) by lower, and the cover rim (61) of upper cover steel plate (6) is connected anchoring with wall box;
The 5th step, all installs the pre-stressed bolt on casing (12), first by common wrench, pre-stressed bolt (12) is carried out to pretension until bolt bottom arrives to pressurization inner panel;
The 6th step, three identical torque spanners are adjusted to the moment that applies having converted, locking, pre-stressed bolt (12) to front side steel plate (1), left side steel plate (2), upper three directions of upper cover steel plate (6) synchronously applies moment by amount, first four angle loading stresses to each pressurization inner panel then synchronously load remaining pre-stressed bolt (12) in three directions;
The 7th step, after confined pressure loaded, repeats to load until do not have creep to produce to rock sample for the first time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080149.5A CN103954499B (en) | 2014-03-06 | 2014-03-06 | A kind of rock confined pressure loading experimental apparatus and experimental technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080149.5A CN103954499B (en) | 2014-03-06 | 2014-03-06 | A kind of rock confined pressure loading experimental apparatus and experimental technique |
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| Publication Number | Publication Date |
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| CN103954499A true CN103954499A (en) | 2014-07-30 |
| CN103954499B CN103954499B (en) | 2016-08-17 |
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| CN201410080149.5A Active CN103954499B (en) | 2014-03-06 | 2014-03-06 | A kind of rock confined pressure loading experimental apparatus and experimental technique |
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| CN106018105A (en) * | 2016-05-17 | 2016-10-12 | 重庆大学 | Multifunctional physical simulation test system for coal engineering and coal model test method |
| CN107907467A (en) * | 2017-12-01 | 2018-04-13 | 贵州大学 | A kind of true triaxial seepage experimental apparatus for applying non-uniform load |
| CN109138950A (en) * | 2018-09-17 | 2019-01-04 | 河南工程学院 | The experimental provision and method of microorganism displacement gas under a kind of true triaxial environment |
| CN109357923A (en) * | 2018-11-09 | 2019-02-19 | 中国科学院武汉岩土力学研究所 | A kind of country rock-lining cutting contact surface device and method that reduction tensioning splitting generates |
| CN109387414A (en) * | 2018-12-19 | 2019-02-26 | 东北大学 | A kind of device and method preparing the artificial sample of sizes hydraulic fracturing experiments |
| CN109612841A (en) * | 2019-01-25 | 2019-04-12 | 中国人民解放军军事科学院国防工程研究院 | A kind of target plate three-dimensional confining pressure machine for body depth penetration test |
| CN109781539A (en) * | 2019-01-25 | 2019-05-21 | 中国人民解放军军事科学院国防工程研究院 | A kind of target plate three-dimensional confining pressure body structure for body depth penetration test |
| CN110487647A (en) * | 2019-07-23 | 2019-11-22 | 中南大学 | A kind of plain type falling weight impact test confining pressure loading device and experimental method |
| CN111122335A (en) * | 2019-12-31 | 2020-05-08 | 中国地质大学（北京） | Loading device for rock fracturing simulation and rock fracturing simulation equipment |
| CN111504791A (en) * | 2020-04-10 | 2020-08-07 | 河南理工大学 | Double-shaft loading test device and test method for karst tunnel |
| CN111879606A (en) * | 2020-09-15 | 2020-11-03 | 中南大学 | Large-size shale sample true triaxial loading hydraulic fracturing strain measurement device |
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