CN116008083B - Large-scale automatic true triaxial coal rock mass test piece simulation test system - Google Patents
Large-scale automatic true triaxial coal rock mass test piece simulation test system Download PDFInfo
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- CN116008083B CN116008083B CN202211668408.7A CN202211668408A CN116008083B CN 116008083 B CN116008083 B CN 116008083B CN 202211668408 A CN202211668408 A CN 202211668408A CN 116008083 B CN116008083 B CN 116008083B
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Abstract
The invention discloses a large-scale automatic true triaxial coal rock mass test piece simulation test system, which comprises a main body model and a main body frame, wherein the main body model comprises a main body high-pressure cavity module and a test piece box module, the main body high-pressure cavity module is of a high-pressure closed pressure bin structure with an outer circle and an inner circle, and is formed by enclosing a cylinder and left and right round end covers, and the test piece box module is a rectangular test piece accommodating cavity; a row of lifters are arranged at the left and right interval of the top of the lower cushion block below the test piece box module, a row of rollers are arranged at the left and right interval of the bottom of the test piece box module through a lining plate, and when the test piece box module is pushed into the main body high-pressure cavity module, the lifters are supported below the rollers; the right side of main part frame is provided with the transportation slide rail, and slidable mounting has test piece case lift to transport frame and right circular end cover to transport the frame on the transportation slide rail. The degree of automation is high, and the operation is convenient; the tightness and the pressure bearing capacity are good, and the test requirements of a large-size test piece can be met; the pressure endurance capacity is strong, and the special environmental test requirement of the deep coal seam can be met.
Description
Technical Field
The invention belongs to the technical field of coal rock mechanical property test equipment, and particularly relates to a large-scale automatic true triaxial coal rock test piece simulation test system.
Background
The existing true triaxial coal rock mass test piece simulation test system still has the following problems: (1) The adopted model has smaller size, and the development process of simulating dynamic disasters has certain space limitation and can not accurately simulate the scene; (2) the automation degree of the installation of the device is low; (3) The structure form of the outer square and the inner square is adopted generally, so that the overall tightness, the bearing capacity and the structural strength are insufficient, and the internal pressure resistance is insufficient.
Disclosure of Invention
The invention aims to provide a true triaxial coal rock mass test piece simulation test system suitable for a large test piece, which has high automation degree and convenient operation; the tightness and the pressure bearing capacity are good, and the test requirements of a large-size test piece can be met; the pressure endurance capacity is strong, and the special environmental test requirement of the deep coal seam can be met.
The technical scheme adopted by the invention is as follows: the main body model comprises a main body high-pressure cavity module and a test piece box module, wherein the main body high-pressure cavity module is of a high-pressure closed pressure bin structure with an outer circle and an inner circle, and is surrounded by a cylinder and left and right round end covers; a row of lifters are arranged at the left and right sides of the top of the lower cushion block below the test piece box module at intervals, and can protrude out of the lower cushion block and also sink into the lower cushion block; a row of rollers are arranged at the bottom of the test piece box module at intervals left and right through a lining plate, and when the test piece box module is pushed into the main body high-pressure cavity module, the lifter is supported below the rollers;
the main body frame is of a rectangular frame structure, the main body model is arranged in the rectangular frame structure, the left end and the right end of the main body model extend out of the main body frame, a transfer sliding rail is arranged on the right side of the main body frame, the transfer sliding rail extends to the position right below the main body high-pressure cavity module, and the width of the transfer sliding rail is smaller than the inner hollow width of the main body frame; a test piece box lifting and conveying frame and a right round end cover conveying frame are slidably mounted on the transfer slide rail, and the test piece box lifting and conveying frame can perform lifting movement and is used for supporting the test piece box module; the top of the right round end cover transfer frame is arc-shaped and is used for supporting the right round end cover, the test piece box lifting transfer frame can enable the test piece box module to be pushed into the main body high-pressure cavity module horizontally after being lifted, the top of the test piece box lifting transfer frame is lower than the bottom of the main body high-pressure cavity module after being lowered, so that the test piece box lifting transfer frame can slide into the lower side of the main body high-pressure cavity module conveniently, and the right round end cover transfer frame can slide leftwards to a set position to install the right round end cover.
As the preferable mode of the scheme, the inner cavity of the test piece box module can be provided with a rectangular test piece with the length of 1000 times the width of 400 times the height of 400 and mm, and the internal pressure of the main body high-pressure cavity module is 10MPa.
It is further preferred that each lifter adopts a double supporting structure which is arranged at intervals and symmetrically, each lifter adopts independent hydraulic drive, and all lifters synchronously lift.
More preferably, the main body frame is welded by section steel.
The invention has the beneficial effects that:
(1) The test piece box module installation environment with the outer circle and the inner square is adopted, the internal pressure resistance is stronger, the sealing capability is better, the internal pressure resistance can be up to 10MPa, and a better test environment is provided for the multi-field coupling coal rock dynamic disaster prevention and control simulation test;
(2) The lifter is supported below the rollers, so that the test piece box module can be pushed in and pulled out more easily and laborsaving, the automation degree of installation is improved, and the large-scale simulation test operation is easier and laborsaving;
(3) The main body model is arranged in a main body frame with a rectangular frame structure, and the main body frame is used for bearing the main body model; the test piece box lifting and transporting frame can perform lifting movement and is used for supporting the test piece box module; the right round end cover transfer frame top is the arc and is used for holding up right round end cover, in the test piece case lift transfer frame rises the back just in time enables test piece case module level to push into main part high pressure chamber module, the test piece case lift transfer frame descends the back top and is less than the bottom of main part high pressure chamber module to the below of slide-in main part high pressure chamber module, make right round end cover transfer frame can slide the installation of setting for right round end cover to the position left, the structural style of slide rail is transported in the sharing of the double transfer frame that designs to large-scale test piece case specially, easy operation, degree of automation is high.
Drawings
Fig. 1 is a schematic view of the structure of the present invention (a state before the specimen box module is mounted in the main body high-pressure chamber module).
Fig. 2 is a schematic structural view of a body model according to the present invention.
Fig. 3 is an interior left view of fig. 2.
Fig. 4 is a schematic structural view of the specimen box module.
Fig. 5 is an interior left view of fig. 4.
Fig. 6 is a simplified view of the arrangement of a heating tube, a temperature control probe, and an ultrasonic probe.
FIG. 7 is a simplified illustration of an anti-channeling plate.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1, a large-scale automated true triaxial coal rock mass specimen simulation test system includes a main body model, a main body frame 37 for supporting the main body model, and a transfer slide rail 36, a specimen box lifting and transporting frame 34, and a right round end cap transporting frame 35. The main body model comprises a main body high-pressure cavity module and a test piece box module. The main body high-pressure cavity module is of a high-pressure closed pressure bin structure with an outer circle and an inner circle, and is formed by enclosing a cylinder and left and right round end covers, the test piece box module is a rectangular test piece accommodating cavity, the rectangular test piece accommodating cavity is collinear with the axial lead of the high-pressure closed pressure bin, and a cushion block is arranged between the main body high-pressure cavity module and the test piece box module.
The main body frame 37 is a rectangular frame structure, and both left and right ends of the main body model extend out of the main body frame 37. The right side of main part frame 37 is provided with and transports slide rail 36, and transport slide rail 36 extends to the main part high pressure chamber module under, and transport slide rail 36's width is less than the interior empty width of main part frame 37. The transfer slide rail 36 is slidably provided with a specimen box lifting and transferring frame 34 and a right round end cover transferring frame 35, and the specimen box lifting and transferring frame 34 can perform lifting and transferring movements and is used for supporting the specimen box module. The top of the right round end cover transferring frame 35 is arc-shaped and is used for supporting the right round end cover 5, the test piece box lifting transferring frame 34 just enables the test piece box module to be horizontally pushed into the main body high-pressure cavity module after being lifted, and the top of the test piece box lifting transferring frame 34 is lower than the bottom of the main body high-pressure cavity module after being lowered, so that the test piece box lifting transferring frame slides into the lower part of the main body high-pressure cavity module, and the right round end cover transferring frame 35 can slide leftwards to a set position to install the right round end cover 5.
As shown in fig. 2-3, the main body model mainly comprises a main body high-pressure cavity module and a test piece box module.
The shell 1 of the main body high-pressure cavity module is of a high-pressure closed pressure bin structure which is formed by combining an outer circle and an inner circle surrounded by bolts through a circular ring 3, a left circular end cover 4 and a right circular end cover 5. A front cushion block 2, a rear cushion block 9, an upper cushion block 10 and a lower cushion block 11 are respectively arranged on the front, the rear, the upper and the lower of the inner wall of the circular ring 3. The front cushion block 2, the rear cushion block 9, the upper cushion block 10 and the lower cushion block 11 enclose a rectangular cavity for the test piece box module to be placed in.
The left round end cover 4 is provided with an axial hydraulic cylinder 6 in a penetrating way, the right round end cover 5 is divided into three types of punching holes, seepage types and protruding types, and the middle part of the right round end cover 5 is provided with punching holes, seepage types and protruding connectors in a penetrating way respectively, namely: when the right round end cover 5 adopts a punching type, a punching interface is arranged in the middle of the right round end cover 5 in a penetrating manner and is used for punching test; when the right round end cover 5 adopts seepage type, the middle part of the right round end cover 5 is provided with a seepage interface in a penetrating way for seepage test; when the right round end cover 5 adopts a protruding type, a protruding interface is installed in the middle of the right round end cover 5 in a penetrating manner and used for a protruding test. Only the right circular end cover 5 needs to be replaced, and correspondingly, different interfaces are arranged on the right circular end cover 5, so that different tests can be carried out.
The left round end cover 4 and the right round end cover 5 are respectively penetrated with a wire harness pipeline leading-out hole 7, a row of lifters 8 are arranged at the top of the lower cushion block 11 at left and right intervals, and the lifters 8 can protrude out of the lower cushion block 11 and also can sink into the lower cushion block 11. Each lifter 8 adopts a double-wheel structure which is arranged at intervals front and back and symmetrically, realizes front and back double support, and has balanced and stable stress. Each lifter 8 is driven by a separate hydraulic pressure, and all lifters 8 are controlled to synchronously lift and lower through a control system.
Referring to fig. 2-5, the specimen box module is a rectangular specimen accommodating cavity surrounded by the left side plate 12, the bottom plate 13, the top plate 14, the right side plate 15, the front side plate 23 and the rear side plate 24 and combined with bolts, and the rectangular specimen accommodating cavity is collinear with the axial lead of the high-pressure closed pressure bin, so that the rectangular specimen is ensured to be arranged in the middle of the main body model. A left pressing plate 16 is arranged on the left side in the rectangular test piece accommodating cavity, a plurality of upper pressing plates 17 are arranged on the top left and right in sequence, and a plurality of front pressing plates 18 are arranged on the front left and right in sequence. The axial hydraulic cylinders 6 can penetrate through the left side plate 12 and be connected with the left pressing plate 16, each upper pressing plate 17 is connected with a top hydraulic cylinder 20 through a top cushion block 19 penetrating through the top plate 14, the top hydraulic cylinder 20 is provided with a hydraulic piston 20a, the top cushion block 19 is acted on by the hydraulic piston 20a, and then the upper pressing plate 17 applies load to the rectangular test piece. Each front platen 18 is connected to a lateral hydraulic cylinder 22 by a side block 21 mounted through a front side plate 23, the lateral hydraulic cylinder 22 also having a hydraulic piston, through which the side block 21 is acted upon by the hydraulic piston, and the rectangular test piece is loaded by the front platen 18.
Referring to fig. 2 to 6, a plurality of heating pipes 27 and temperature control probes 28 are installed in the openings of the upper platen 17, the front platen 18, the bottom plate 13, and the rear plate 24, and a plurality of ultrasonic probes 29 are installed in the openings of the upper platen 17, the front platen 18, the left platen 16, the bottom plate 13, the rear plate 24, and the right plate 15. A row of rollers 26 are mounted at left and right intervals on the bottom of the test piece box module through a lining plate 25, and when the test piece box module is pushed into the main body high-pressure cavity module, the lifter 8 is supported below the rollers 26.
Preferably, a high-frequency vibrator is arranged on the cavity of the axial hydraulic cylinder 6, high-speed vibration is generated under the action of a high-pressure air source, and high-frequency vibration force can be transmitted to the test piece right through the corresponding hydraulic cavity, the hydraulic piston and the left pressing plate 16.
The anti-channeling plates 30 corresponding to the upper pressing plates 17 one by one are arranged right above the bottom plate 13, and the anti-channeling plates 30 are provided with a central air inlet hole 30a and a plurality of annular grooves 30b surrounding the central air inlet hole 30a, and all the annular grooves 30b are communicated with the central air inlet hole 30a through communication grooves 30c which are distributed in a divergent mode, as shown in fig. 6. The annular grooves 30b are rectangular or circular and are equally spaced apart.
The air inlet pipe transversely passes through the side wall of the test piece box module and is connected to the bottom of the central air inlet hole 30a, the ventilation partition plate 31 is arranged above the anti-channeling plate 30, the filter plates 32 are arranged at the left end and the right end of the test piece, and the sealing gaskets 33 are arranged on the upper part, the lower part, the front part and the rear part of the test piece.
The inner cavity of the test piece box module can be provided with a rectangular test piece with the length of 1000 times the width of 400 times the height of 400 and mm, and the internal pressure resistance of the main body high-pressure cavity module is 10MPa. But are not limited to, this gauge size.
Only one axial hydraulic cylinder 6 has a maximum loading pressure of 5000 kN; four groups of top hydraulic cylinders 20 and side hydraulic cylinders 22 are respectively arranged, each group of hydraulic cylinders is provided with two parallel hydraulic loading systems for pressurization, one of the hydraulic cylinders is a static load loading system, the other hydraulic loading system is a dynamic load loading system, the maximum loading pressure of a single group of hydraulic loading devices is 3000 kN, each group of hydraulic loading systems is used for independently controlling one pressing plate and is arranged on the corresponding pressing plate in a left-right centering mode, and the axial hydraulic cylinders 6, the top hydraulic cylinders 20 and the side hydraulic cylinders 22 can be used for loading dynamic and static loads.
Claims (4)
1. A large-scale automatic true triaxial coal rock mass test piece analogue test system which is characterized in that: the test piece box comprises a main body model and a main body frame (37) for supporting the main body model, wherein the main body model comprises a main body high-pressure cavity module and a test piece box module, the main body high-pressure cavity module is of a high-pressure closed pressure bin structure with an outer circle and an inner circle, the main body high-pressure cavity module is formed by enclosing a cylinder and left and right round end covers, the test piece box module is a rectangular test piece accommodating cavity, the rectangular test piece accommodating cavity is collinear with the axial lead of the high-pressure closed pressure bin, and a cushion block is arranged between the main body high-pressure cavity module and the test piece box module; a row of lifters (8) are arranged at left and right intervals on the top of a lower cushion block (11) below the test piece box module, and the lifters (8) can protrude out of the lower cushion block (11) and also can sink into the lower cushion block (11); a row of rollers (26) are arranged at the bottom of the test piece box module at left and right intervals through a lining plate (25), and when the test piece box module is pushed into the main body high-pressure cavity module, the lifter (8) is supported below the rollers (26);
the main body frame (37) is of a rectangular frame structure, the main body model is arranged in the rectangular frame structure, the left end and the right end of the main body model extend out of the main body frame (37), the right side of the main body frame (37) is provided with a transfer sliding rail (36), the transfer sliding rail (36) extends to the position right below the main body high-pressure cavity module, and the width of the transfer sliding rail (36) is smaller than the inner space width of the main body frame (37); a test piece box lifting and transporting frame (34) and a right round end cover transporting frame (35) are slidably arranged on the transporting slide rail (36), and the test piece box lifting and transporting frame (34) can perform lifting movement and is used for supporting a test piece box module; the top of the right round end cover transferring frame (35) is arc-shaped and is used for supporting the right round end cover (5), the test piece box lifting transferring frame (34) can just enable the test piece box module to be horizontally pushed into the main body high-pressure cavity module after being lifted, the top of the test piece box lifting transferring frame (34) is lower than the bottom of the main body high-pressure cavity module after being lowered so as to conveniently slide into the lower part of the main body high-pressure cavity module, and the right round end cover transferring frame (35) can slide leftwards to a set position to install the right round end cover (5);
the test piece box module is a rectangular test piece accommodating cavity which is surrounded by a left side plate (12), a bottom plate (13), a top plate (14), a right side plate (15), a front side plate (23) and a rear side plate (24) through combining bolts, and the rectangular test piece accommodating cavity is collinear with the axial lead of the high-pressure closed pressure bin, so that the rectangular test piece is ensured to be arranged in the middle of the main body model; a left pressing plate (16) is arranged at the left side in the rectangular test piece accommodating cavity, a plurality of upper pressing plates (17) are sequentially arranged at the left and right sides of the top, and a plurality of front pressing plates (18) are sequentially arranged at the left and right sides of the front part; the axial hydraulic cylinders (6) can penetrate through the left side plate (12) to be connected with the left pressing plate (16), each upper pressing plate (17) is connected with the top hydraulic cylinder (20) through a top cushion block (19) penetrating through the top plate (14), the top hydraulic cylinder (20) is provided with a hydraulic piston (20 a), the top cushion block (19) is acted on by the hydraulic piston (20 a), then the upper pressing plate (17) applies load to a rectangular test piece, each front pressing plate (18) is connected with the lateral hydraulic cylinder (22) through a side cushion block (21) penetrating through the front side plate (23), the lateral hydraulic cylinder (22) is also provided with a hydraulic piston, and the rectangular test piece is applied with load through the hydraulic piston acting side cushion block (21) and the front pressing plate (18);
a plurality of heating pipes (27) and temperature control probes (28) are arranged on the upper pressing plate (17), the front pressing plate (18), the bottom plate (13) and the rear side plate (24) in an opening mode, and a plurality of ultrasonic probes (29) are arranged on the upper pressing plate (17), the front pressing plate (18), the left pressing plate (16), the bottom plate (13), the rear side plate (24) and the right side plate (15) in an opening mode.
2. The large-scale automated true triaxial coal rock mass specimen simulation test system according to claim 1, characterized in that: the inner cavity of the test piece box module can be provided with a rectangular test piece with the length of 1000 times the width of 400 times the height of 400 and mm, and the internal pressure resistance of the main body high-pressure cavity module is 10MPa.
3. The large-scale automated true triaxial coal rock mass specimen simulation test system according to claim 1, characterized in that: each lifter (8) adopts a double-support structure which is arranged at intervals and symmetrically, each lifter (8) adopts independent hydraulic drive, and all lifters (8) synchronously lift.
4. The large-scale automated true triaxial coal rock mass specimen simulation test system according to claim 1, characterized in that: the main body frame (37) is formed by welding profile steel.
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