CN111579755A - Stope filling body simulation experiment device and method - Google Patents

Stope filling body simulation experiment device and method Download PDF

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Publication number
CN111579755A
CN111579755A CN202010594517.3A CN202010594517A CN111579755A CN 111579755 A CN111579755 A CN 111579755A CN 202010594517 A CN202010594517 A CN 202010594517A CN 111579755 A CN111579755 A CN 111579755A
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filling
stope
side wall
box body
plate
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李兵磊
远彦威
左蔚然
黄明清
刘青灵
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Fuzhou University
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Fuzhou University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04Analysing solids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12Pressure testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract

The invention relates to a mine stope filling body simulation experiment device and a mine stope filling body simulation experiment method, which comprise a bottom plate, wherein an experiment box body for filling simulation materials is arranged on the bottom plate, and the front side wall and the rear side wall of the experiment box body are formed by assembling a plurality of detachable transparent toughened glass plates; the upper side of the experiment box body is provided with a plurality of upper pressure plates which are in one-to-one correspondence with the positions of the tempered glass plates on the front side wall and the rear side wall, and the inner sides of the left side wall plate and the right side wall plate of the experiment box body are respectively provided with a side pressure plate. The mine stope filling body simulation experiment device is convenient to use, easy to operate and high in practicability, can simulate and analyze the top of a stope and the stress condition of a filling body in the stope excavating and filling processes and the process, greatly restores the real mining process, provides a basis for the improvement of a supporting and filling process adopted on site, enables workers to visually know the real mining and filling processes, and solves the problem that the stope and the filling body are difficult to detect under the condition of deep operation of a metal mine.

Description

Stope filling body simulation experiment device and method
Technical Field
The invention relates to a mine stope filling body simulation experiment device and method.
Background
In the underground mine filling process, ground filling is built on the ground, filling equipment, a stirring process and the preparation of the whole filling are advanced and transparent, but in the process that filling materials enter a stope, the stope is relatively closed, personnel and equipment cannot enter the filling process, the filling process is not detected and controlled, and because the filling process is totally closed, the filling process cannot be objectively known, and the whole stress condition of a filling body cannot be evaluated.
Disclosure of Invention
In view of the above, the invention aims to provide a mine stope filling body simulation experiment device and method which are convenient to use and strong in practicability, and can simulate and analyze the excavation and filling processes of a stope, so as to provide a basis for improving a supporting and filling process adopted on site.
The invention is realized by adopting the following scheme: a simulation experiment device for a filling body of a mine stope comprises a bottom plate, wherein an experiment box body for filling simulation materials is arranged on the bottom plate, and the front side wall and the rear side wall of the experiment box body are formed by splicing a plurality of detachable transparent toughened glass plates; the upper side of the experiment box body is provided with a plurality of upper pressure plates which are in one-to-one correspondence with the positions of the tempered glass plates on the front side wall and the rear side wall, and the inner sides of the left side wall plate and the right side wall plate of the experiment box body are respectively provided with a side pressure plate.
Furthermore, a portal frame is fixedly connected to the bottom plate, the experiment box body is located in the middle of the portal frame, a plurality of upper pressure applying cylinders which are downward and correspond to the upper pressure applying plates one by one are mounted on a cross beam of the portal frame, the lower ends of the upper pressure applying cylinders are connected with upper pressure applying heads, and the lower ends of the upper pressure applying heads are connected with pressure sensors and are abutted to the corresponding upper pressure applying plates.
Furthermore, side pressure cylinders with driving ends facing the left side face and the right side face of the experimental box body are horizontally arranged on the vertical upright columns on the two sides of the portal frame, the driving ends of the side pressure cylinders are connected with side pressure heads, and the inner sides of the side pressure heads are connected with pressure sensors and are abutted to the side pressure plates on the same side.
Furthermore, the left side wall plate and the right side wall plate of the experiment box body are made of steel plates and provided with windows for the side pressure applying heads to penetrate through; and the toughened glass plate is provided with a mounting hole for arranging detection equipment.
Further, the fixed plate is welded on the outer side of the lower end of the left side wall plate and the outer side of the lower end of the right side wall plate of the experiment box body, the fixed plate is connected to the bottom plate through bolts, and a T-shaped groove used for installing the bolts and matched with the bolts in a sliding mode is formed in the bottom plate.
Further, be connected with the spacing horizontal pole that is located before the experiment box, the rear side between the left and right side wallboard of experiment box, link together through the I shape connecting piece that both sides have the installation channel between the two adjacent toughened glass boards, link together through the U type connecting piece that has the installation channel between the toughened glass board and the left and right side wallboard of experiment box, U type connecting piece passes through screw fixed connection on the lateral wall board of experiment box, in the installation channel of toughened glass board side slidable mounting I shape connecting piece or U type connecting piece.
Furthermore, the left side wall plate and the right side wall plate of the experiment box body are fixedly connected to the bottom plate through bolts, and the bottom plate is fixedly connected to the lifting platform below the bottom plate through bolts.
The other technical scheme of the invention is as follows: an experiment method of the stope filling body simulation experiment device comprises the following steps: (1) using concrete and other rock-like materials in corresponding proportion as simulation materials to simulate surrounding rocks or ores; determining faults and fractures which have influences on the stope according to actual engineering geological conditions, wherein the faults and the fractures are simulated through fault filling materials; (2) according to the actual engineering geological conditions, the buried depth of the ore body and the pressure born by the upper part are calculated, and the pressure measurement is determined by a ground stress measurement method; (3) setting the pressure of the upper pressure cylinder and the side pressure cylinder according to the determined force measurement; (4) and dividing the stopes and the pillars in the same proportion on the stopes simulated in the experimental box body, and gradually excavating and filling the divided stopes and pillars according to the actual working sequence.
Furthermore, in the step (4), the excavation and filling process is to take off the toughened glass plate on the front side or the rear side of the experimental box body at the corresponding position of the chamber or the pillar to be excavated, then to excavate, and to embed the stress strain sensors in advance at different places in the excavation process; and after the excavation is finished, the taken toughened glass plate is mounted, then filling slurry is injected into the goaf for filling, and after the filling slurry is solidified, acoustic emission probes are mounted on the toughened glass plates on the front side and the rear side of the filling body.
Compared with the prior art, the invention has the following beneficial effects: the mine stope filling body simulation experiment device is convenient to use, easy to operate and strong in practicability, facilitates clear observation and monitoring of the stress conditions of the stope and the filling body and the expansion change conditions of crack cracks, can simulate and analyze the stress conditions of the top and the filling body in the stope excavating and filling processes and the process, greatly restores the real mining process, provides a basis for improving the supporting and filling process adopted on site, enables workers to visually know the mining and filling processes of a mine, and solves the problem that the stability of the stope and the filling body is difficult to detect under the condition of deep operation of a metal mine.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a front view of an experimental box in an embodiment of the present invention;
FIG. 3 is a top view of an experimental box according to an embodiment of the present invention;
the reference numbers in the figures illustrate: 100-bottom plate, 200-experimental box body, 210-toughened glass plate, 220-upper pressure plate, 230-side pressure plate, 240-limiting cross bar, 250-I-shaped connecting piece, 260-U-shaped connecting piece, 270-fixing plate, 300-portal frame, 310-upper pressure cylinder, 311-upper pressure cylinder, 320-side pressure cylinder, 321-side pressure cylinder and 400-lifting platform.
Detailed Description
As shown in fig. 1 to 3, the mine stope filling body simulation experiment device comprises a bottom plate 100, wherein an experiment box body 200 for filling simulation materials is arranged on the bottom plate 100, and the front side wall and the rear side wall of the experiment box body 200 are formed by assembling a plurality of detachable transparent toughened glass plates 210; a plurality of upper pressing plates 220 which are in one-to-one correspondence with the positions of the tempered glass plates on the front and rear side walls are arranged on the upper side of the experiment box body 200, and side pressing plates 230 are respectively arranged on the inner sides of the left and right side wall plates of the experiment box body 200; the experimental device is mainly used for simulating the condition of mining one in three separated mining areas of a mine, concrete and other rock-like materials are used as simulation materials according to corresponding proportions to simulate surrounding rocks or ores, gypsum or other fault filling materials are used for simulating faults or cracks which affect a stope, the real working state of the mine is restored, and the stress conditions of ore pillars and filling bodies are researched; the simulation material in the experimental box divides into stope and ore pillar, before the experimental box, every toughened glass board on the back lateral wall corresponds a stope region or ore pillar region, before the experimental box, the quantity of toughened glass board on the back lateral wall and the quantity of last clamp plate can be adjusted according to the quantity of the stope of dividing and ore pillar, simulate real variable force through last clamp plate, adjust the pressure size of last clamp plate and simulate the stope of the different degree of depth, both sides are fixed and provide the yawing force with the restraint of side clamp plate, the stress state of real simulation stope, the state that can real reduction stope exploitation and filling process.
The preceding, the back lateral wall of experiment box adopt detachable transparent toughened glass board, make things convenient for the outside to carry out the observation of experimentation, can pull down with the transparent toughened glass board that will exploit stope or ore pillar correspond, are convenient for draw out the simulation exploitation process to the analog material in stope or ore pillar.
In this embodiment, a portal frame 300 is fixedly connected to the bottom plate 100, the experimental box 200 is located in the middle of the portal frame 300, a plurality of upper pressing cylinders 310 which are downward and correspond to the upper pressing plates one to one are mounted on a beam of the portal frame, the lower end of each upper pressing cylinder 310 is connected with an upper pressing head 311, and the lower end of each upper pressing head 311 is connected with a pressure sensor and abuts against the corresponding upper pressing plate.
In this embodiment, side pressure cylinders 320 with driving ends facing to the left and right side surfaces of the experimental box body are horizontally installed on the vertical columns on the two sides of the gantry 300, the driving ends of the side pressure cylinders 320 are connected with side pressure heads 321, and the inner sides of the side pressure heads 321 are connected with pressure sensors and abutted against the side pressure plates on the same side; the upper pressure applying cylinder and the side pressure applying cylinder are hydraulic cylinders, each upper pressure applying head and each side pressure applying head are provided with an independent pressure sensor, each pressure applying hydraulic cylinder, each pressure applying head and the corresponding pressure sensor form an independent control unit, and the pressure of the corresponding area can be controlled.
In this embodiment, the left and right side wall plates of the experimental box 200 are made of steel plates and are provided with windows through which the side pressure applying heads pass; the toughened glass plate is provided with a mounting hole for arranging detection equipment, the detection equipment comprises a stress-strain sensor and an acoustic emission probe, wherein the stress-strain sensor is embedded in the filling body, a signal wire of the stress-strain sensor penetrates out of the mounting hole, and the acoustic emission probe is arranged at the mounting hole; the bottom plate is provided with a drain hole, so that moisture in the filling slurry can flow out quickly, and the filling slurry can be injected through arranging a grouting hole on the top plate of the stope.
In this embodiment, the welding of the left and right side wallboard lower extreme outside of experiment box has fixed plate 270, and the fixed plate passes through bolted connection on the bottom plate, offer on the bottom plate be used for mounting bolt and with bolt sliding fit's T type groove, the head card of bolt is in T type inslot, the pole portion of bolt is upwards worn out behind T type groove and the fixed plate 270 by nut locking, from this, when unscrewing the nut, can realize moving about and control regulation fixed plate and left and right side wallboard, the position of adjustment left and right side wallboard, and then adjust the length of whole experiment box, the not equidimension stope of can true simulation, it is more convenient to the stope of the simulation different situation.
In this embodiment, a limiting cross bar located at the front side and the rear side of the experimental box body is connected between the left side wall plate and the right side wall plate of the experimental box body, two adjacent toughened glass plates are connected together through an i-shaped connecting piece 250 with installation channels on two sides, the toughened glass plates are connected together with the left side wall plate and the right side wall plate of the experimental box body through a U-shaped connecting piece 260 with installation channels, the U-shaped connecting piece is fixedly connected to the side wall plate of the experimental box body through a screw, and the side edges of the toughened glass plates are slidably installed in the installation channels of the i-shaped connecting piece or the U; the toughened glass plate is convenient to disassemble and assemble and easy to operate, the two side edges of the toughened glass plate can be directly slid in along the two side installation channels during installation, and the toughened glass plate can be directly pulled out upwards during disassembly; the splicing among the toughened glass plates is realized through the I-shaped connecting piece 250, the connection between the toughened glass plates and the left and right side wall plates of the experiment box body is realized through the U-shaped connecting piece, and the number of the spliced steel glass protection plates can be increased or reduced when the length of the whole experiment box body is adjusted.
In this embodiment, in order to ensure the stability of the front and rear side walls of the experimental box body 200 formed by splicing the tempered glass plates, a limiting cross bar 240 located at the front and rear sides of the experimental box body is connected between the left and right side walls of the experimental box body 200, and the i-shaped connecting piece and the U-shaped connecting piece are located at the inner side of the limiting cross bar, so as to prevent the front and rear side walls of the experimental box body 200 from being extruded by the internal filling material to deform outwards; the two ends of the limiting cross rod are fixedly connected to the left side wall plate and the right side wall plate of the experiment box body through screws, the length of the whole experiment box body is adjusted, and the limiting cross rod with different length specifications only needs to be replaced.
In this embodiment, the left and right side wall plates of the experiment box 200 are fixedly connected to the bottom plate 100 by bolts, the bottom plate 100 is fixedly connected to the lifting platform 400 below the bottom plate by bolts, and the height of the whole experiment box can be adjusted by lifting the lifting platform.
The mine stope filling body simulation experiment device solves the problem that stability detection of stopes and filling bodies is difficult under the condition of metal mine deep operation, an upper pressure applying head can truly simulate the stress condition of a stope top plate, and the pressure provided by the pressure head can be adjusted according to different burial depths; the front side and the rear side of the device are transparent structures, so that the stress conditions of a stope and a filling body can be observed clearly, the stress conditions of the stope and the filling body and the expansion change conditions of crack fractures can be monitored in time through an external camera device, and the stress strength of the filling body, the top of the stope and a reserved ore pillar can be monitored in real time through a pressure sensor; the stress conditions of the top and the filling body in the excavation and filling processes of the stope can be reproduced, the real mining process is greatly restored, a basis is provided for the improvement of the supporting and filling process adopted on site, and workers can also visually know the mining and filling processes of the mine.
An experiment method of the stope filling body simulation experiment device comprises the following steps: (1) using concrete and other rock-like materials in corresponding proportion as simulation materials to simulate surrounding rocks or ores; determining faults and fractures which have influences on the stope according to actual engineering geological conditions, wherein the faults and the fractures are simulated through fault filling materials; (2) according to the actual engineering geological conditions, the buried depth of the ore body and the pressure born by the upper part are calculated, and the pressure measurement is determined by a ground stress measurement method; (3) setting the pressure of the upper pressure cylinder and the side pressure cylinder according to the determined force measurement; (4) dividing the stope simulated in the experimental box body into a chamber and a pillar in the same proportion, and gradually excavating and filling the divided chamber and pillar according to the actual working sequence; the whole experiment can be directly recorded and observed through a high-speed camera, and reference data is provided for later-stage experiment result arrangement.
In the embodiment, in the step (4), the excavation and filling process includes taking down the tempered glass plate on the front side or the rear side of the experimental box body at the position corresponding to the chamber or the pillar to be excavated, then excavating, and embedding the stress strain sensors in advance at different places in the excavation process; after the excavation is finished, the taken toughened glass plate is mounted, then filling slurry is injected into the goaf to fill the goaf, after the filling slurry is solidified, acoustic emission probes are mounted on the toughened glass plates on the front side and the rear side of the filling body, the acoustic emission probes are directly mounted on mounting holes of the toughened glass plates, and signal wires of the stress-strain sensors can be led out from the mounting holes of the toughened glass plates.
The experimental method can analyze the stress strength of the ore pillar and the stability of the filling body, can accurately analyze and evaluate the filling process of the whole filling stope and the strength of the filling body, can reproduce the supporting performance of the ore pillar in the mining process so as to improve the whole mine filling process, can be still used for simulating the stability of a mine goaf and the filling body under different operation environments and the stress condition of the ore pillar under the condition of deep operation of a metal mine, ensures the stability of mine filling, saves manpower and material resources, improves the working efficiency and ensures the operation of mine mining under a safe environment.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims (8)

1. The utility model provides a mine stope obturator simulation experiment device which characterized in that: the device comprises a bottom plate, wherein an experiment box body used for filling simulation materials is arranged on the bottom plate, and the front side wall and the rear side wall of the experiment box body are formed by splicing a plurality of detachable transparent toughened glass plates; the upper side of the experiment box body is provided with a plurality of upper pressure plates which are in one-to-one correspondence with the positions of the tempered glass plates on the front side wall and the rear side wall, and the inner sides of the left side wall plate and the right side wall plate of the experiment box body are respectively provided with a side pressure plate.
2. The stope filling body simulation experiment device according to claim 1, wherein: the device comprises a base plate, an experiment box body, a portal frame, a plurality of upper pressure applying cylinders, an upper pressure applying head and a plurality of pressure sensors, wherein the portal frame is fixedly connected to the base plate, the experiment box body is positioned in the middle of the portal frame, the plurality of upper pressure applying cylinders which are downward and correspond to the upper pressure applying plates one to one are installed on a cross beam of the portal frame, the lower ends of the upper pressure applying cylinders are connected with the upper pressure applying heads, and the lower ends of the upper.
3. The stope filling body simulation experiment device according to claim 2, wherein: and side pressure cylinders with driving ends facing the left side surface and the right side surface of the experimental box body are horizontally arranged on the vertical upright columns on the two sides of the portal frame, the driving ends of the side pressure cylinders are connected with side pressure heads, and the inner sides of the side pressure heads are connected with pressure sensors and are abutted to the side pressure plates on the same side.
4. The stope filling body simulation experiment device according to claim 3, wherein: the left side wall plate and the right side wall plate of the experiment box body are made of steel plates and provided with windows for the side pressure applying heads to penetrate through; the tempered glass plate is provided with a mounting hole for arranging detection equipment; the welding of the left and right side wallboard lower extreme outside of experiment box has the fixed plate, and the fixed plate passes through bolted connection on the bottom plate, seted up on the bottom plate for the construction bolt and with bolt sliding fit's T type groove.
5. The stope filling body simulation experiment device according to claim 1, wherein: be connected with the spacing horizontal pole that is located before the experiment box, the rear side between the left and right side wallboard of experiment box, the I shape connecting piece that has the installation channel through both sides links together between the two adjacent toughened glass boards, the left side of toughened glass board and experiment box, link together through the U type connecting piece that has the installation channel between the right side wallboard, U type connecting piece passes through screw fixed connection on the lateral wall board of experiment box, in the installation channel of toughened glass board side slidable mounting I shape connecting piece or U type connecting piece.
6. The stope filling body simulation experiment device according to claim 1, wherein: the left side wall plate and the right side wall plate of the experiment box body are fixedly connected to the bottom plate through bolts, and the bottom plate is fixedly connected to the lifting platform below the bottom plate through bolts.
7. An experimental method of the stope filling body simulation experimental device according to claim 4, characterized in that: the method comprises the following steps: (1) using concrete and other rock-like materials in corresponding proportion as simulation materials to simulate surrounding rocks or ores; determining faults and fractures which have influences on the stope according to actual engineering geological conditions, wherein the faults and the fractures are simulated through fault filling materials; (2) according to the actual engineering geological conditions, the buried depth of the ore body and the pressure born by the upper part are calculated, and the pressure measurement is determined by a ground stress measurement method; (3) setting the pressure of the upper pressure cylinder and the side pressure cylinder according to the determined force measurement; (4) and dividing the stopes and the pillars in the same proportion on the stopes simulated in the experimental box body, and gradually excavating and filling the divided stopes and pillars according to the actual working sequence.
8. The experimental method of the stope filling body simulation experimental device according to claim 1, characterized in that: in the step (4), in the excavation and filling process, the toughened glass plate on the front side or the rear side of the experimental box body at the corresponding position of the chamber or the pillar to be excavated is taken down, then excavation is carried out, and stress strain sensors are embedded in different places in advance in the excavation process; and after the excavation is finished, the taken toughened glass plate is mounted, then filling slurry is injected into the goaf for filling, and after the filling slurry is solidified, acoustic emission probes are mounted on the toughened glass plates on the front side and the rear side of the filling body.
CN202010594517.3A 2020-06-28 2020-06-28 Stope filling body simulation experiment device and method Pending CN111579755A (en)

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CN202010594517.3A CN111579755A (en) 2020-06-28 2020-06-28 Stope filling body simulation experiment device and method

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112557137A (en) * 2020-11-30 2021-03-26 北京科技大学 Test device for simulating compression and consolidation of filling body
CN112903465A (en) * 2021-02-04 2021-06-04 太原理工大学 Device and method for testing double bearing capacity of single-row group columns in inclined goaf
CN112903462A (en) * 2021-02-04 2021-06-04 太原理工大学 Device and method for testing bearing capacity of single-row group column in horizontal goaf under double-shaft loading
CN112903454A (en) * 2021-02-04 2021-06-04 太原理工大学 Horizontal goaf multi-row group column tensile strength testing device and method
CN117451976A (en) * 2023-12-25 2024-01-26 山东黄金矿业科技有限公司充填工程实验室分公司 Indoor experimental device for simulating filling of underground metal mine stope

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112557137A (en) * 2020-11-30 2021-03-26 北京科技大学 Test device for simulating compression and consolidation of filling body
CN112903465A (en) * 2021-02-04 2021-06-04 太原理工大学 Device and method for testing double bearing capacity of single-row group columns in inclined goaf
CN112903462A (en) * 2021-02-04 2021-06-04 太原理工大学 Device and method for testing bearing capacity of single-row group column in horizontal goaf under double-shaft loading
CN112903454A (en) * 2021-02-04 2021-06-04 太原理工大学 Horizontal goaf multi-row group column tensile strength testing device and method
CN112903465B (en) * 2021-02-04 2022-06-14 太原理工大学 Device and method for testing double bearing capacity of single-row group columns in inclined goaf
CN117451976A (en) * 2023-12-25 2024-01-26 山东黄金矿业科技有限公司充填工程实验室分公司 Indoor experimental device for simulating filling of underground metal mine stope
CN117451976B (en) * 2023-12-25 2024-03-08 山东黄金矿业科技有限公司充填工程实验室分公司 Indoor experimental device for simulating filling of underground metal mine stope

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