Fractured rock mass fusion seepage test device for simulating roof water inrush

Abstract

The invention provides a fractured rock mass fusion seepage test device for simulating roof water inrush, and belongs to the technical field of coal mining. The device comprises a water gushing simulation system, a fractured rock mass multi-flow-state seepage system and a data acquisition and analysis system, wherein the water gushing simulation system is used for continuously outputting constant-pressure water flow or non-continuously outputting water flow; the fractured rock mass multi-flow-state seepage system comprises a first bin body, a second bin body and a third bin body which are sequentially arranged in a communicating mode. The data acquisition and analysis system comprises a collection unit and an analysis unit which are arranged below the third bin body, the collection unit is provided with a filtering part, a water collection part and a weighing part, and the analysis unit is electrically connected with the water burst simulation system, the fractured rock mass multi-flow-state seepage system and the weighing part so as to analyze water disaster formation seepage parameters; the method is used for simulating a disaster forming mechanism of continuous high water inflow of a water-bearing layer of a huge thick sandstone roof in the mining process, finding out disaster forming criteria of separation water filling-underground water inrush, and providing seepage parameters for numerical simulation of water disaster forming.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining, and in particular relates to a fractured rock mass fusion seepage test device for simulating roof water inrush. Background Art

[0002] The amount of water inrush from the roof of the mine in the Jurassic coal mining area is large, and roof water inrush disasters often occur during coal mining. Affected by the thick composite sandstone aquifer on the roof and high-intensity mining, on the one hand, the ultra-high water-conducting fracture zone (with a maximum fracture-mining ratio of more than 30) in the roof of the deep-buried Jurassic coal seam can directly communicate with the thick sandstone aquifer, causing continuous high water inrush disasters, such as Figure 1 On the other hand, the abscission layer formed at the junction of the overburden bending and sinking zone and the fracture zone after mining is easily recharged by the water from the Luohe Formation aquifer, and it is very easy to form an abscission water storage area. Once squeezed by the settlement of the overburden, it is very easy to cause the abscission water to flow to the working face along the overburden O-ring, forming a pulse-type abscission water inrush, such as Figure 1 (b) as shown.

[0003] The continuous and non-continuous water inrush disasters that occur during the above-mentioned mining process will have serious adverse effects on production, and may even cause serious economic losses and casualties. Therefore, it is necessary to study the multi-flow state water disaster mechanism of fractured rock mass with continuous and non-continuous water inrush, find out the disaster criterion of abscission water filling-underground water inrush, and provide seepage parameters for numerical simulation of water disasters. However, the existing triaxial fractured rock mass seepage test system cannot provide continuous and non-continuous water inrush simulation.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a fractured rock fusion seepage test device for simulating roof water inrush, which is used to simulate the disaster mechanism of continuous high water inflow of thick sandstone roof aquifers during mining, find out the disaster criterion of abscission water filling-underground water inrush, and provide seepage parameters for numerical simulation of water disasters.

[0006] In order to achieve the above-mentioned purpose, the fractured rock mass fusion seepage test device simulating roof water inrush of the present invention provides the following technical solutions:

[0007] A fractured rock mass fusion seepage test device simulating roof water inrush, comprising:

[0008] A water gushing simulation system, wherein the water gushing simulation system has a constant pressure water outlet unit for continuously outputting a constant pressure water flow or non-continuously outputting a water flow to simulate continuous water gushing and non-continuous water gushing disasters;

[0009] A fractured rock mass multi-flow state seepage system, the fractured rock mass multi-flow state seepage system comprising a first bin for containing weakly cemented soft rock, a second bin for containing fractured rock mass and a third bin for containing broken rock mass, which are sequentially connected and arranged, the first bin is connected to the water outlet of the water gushing simulation system, and the water in the water gushing simulation system is discharged after passing through the first bin, the second bin and the third bin in sequence;

[0010] A data acquisition and analysis system, the data acquisition and analysis system includes a collection unit arranged below a third bin and an analysis unit connected to the collection unit, the collection unit has a filter component, a water collecting component and a weighing component arranged in sequence from top to bottom, the filter component is arranged above the water collecting component and is used to filter rock particles in seepage water flowing out of a fractured rock multi-flow state seepage system, the water collecting component is used to hold water filtered by the filter component, the weighing component is used to weigh the weight of the water collected in the water collecting component, and the analysis unit is electrically connected to a water gushing simulation system, a fractured rock multi-flow state seepage system and the weighing component to analyze water disaster seepage parameters.

[0011] As a further optimized technical solution, the constant pressure water outlet unit includes:

[0012] A cylinder, wherein the cylinder is horizontally arranged, and an isolation plug is slidably arranged in the cylinder, wherein the isolation plug divides the storage space in the cylinder into two cavities, wherein one cavity is used to contain gas, and the other cavity is used to contain liquid water, and the cavity used to contain liquid water is connected to a multi-flow seepage system of a fractured rock mass;

[0013] A gas supply unit, the gas supply unit is connected to a cavity in the cylinder for containing gas, so as to provide gas into the cylinder;

[0014] A water supply unit, the water supply unit is connected to a cavity in the cylinder for containing liquid water to provide liquid water into the cylinder;

[0015] The collecting unit is arranged on the cylinder and is used to collect the water pressure, water flow rate and water outlet time in the cylinder. The collecting unit is connected to the analyzing unit.

[0016] As a further optimized technical solution, the air supply unit includes an air pump and an air supply pipeline. One end of the air supply pipeline is connected to the air pump, and the other end is connected to a cavity in the cylinder for containing gas. The air supply pipeline is provided with a first control valve for controlling the on and off of the air supply pipeline.

[0017] As a further optimized technical solution, the water supply unit includes a water pump and a water supply pipeline. One end of the water supply pipeline is connected to the water pump, and the other end is connected to the cavity in the cylinder for holding liquid water. The water supply pipeline is provided with a second control valve for controlling the on and off of the water supply pipeline.

[0018] As a further optimized technical solution, a connecting channel is provided between the first warehouse body and the second warehouse body, and the first warehouse body and the second warehouse body are connected through the connecting channel.

[0019] As a further optimized technical solution, the fractured rock multi-state seepage system has a test kettle body, a first seepage plate is fixedly arranged at the bottom of the test kettle body, a second seepage plate is slidably arranged above the first seepage plate, and the space between the first seepage plate and the second seepage plate and the space enclosed by the inner wall of the test kettle body constitute the third bin body; the volume of the second bin body is variably arranged above the third bin body and is connected to the third bin body through the second seepage plate.

[0020] As a further optimized technical solution, a third seepage plate is slidably arranged above the second seepage plate, two baffles are arranged in parallel below the third seepage plate, the top end of the baffle is fixedly connected to the third seepage plate, and the bottom end of the baffle is fixedly connected to the second seepage plate, and an extrusion plate is slidably arranged between the two baffles, and the space enclosed by the second seepage plate, the third seepage plate, the two baffles and the extrusion plate constitutes the second warehouse body.

[0021] As a further optimized technical solution, a vertical driving component is arranged above the second infiltration plate, which is used to drive the second infiltration plate to slide in the vertical direction to change the volume of the third warehouse body; a horizontal driving component is arranged on one side of the extrusion plate, which is used to drive the extrusion plate to move in the horizontal direction to change the volume of the second warehouse body.

[0022] As a further optimized technical solution, a plurality of slide grooves are arranged at intervals along the vertical direction on the side wall of the test kettle body, and the second seepage plate and the third seepage plate are respectively provided with protrusions adapted to the shape of the slide grooves. The protrusions are arranged in the slide grooves to achieve balanced sliding of the second seepage plate and the third seepage plate in the vertical direction.

[0023] As a further optimized technical solution, at least one of the second infiltration plate and the third infiltration plate is provided with a guide groove in the horizontal direction on the side facing the extrusion plate, and the extrusion plate is provided with a sliding block adapted to the shape of the guide groove, and the sliding block is arranged in the guide groove and slides along the guide groove.

[0024] Beneficial effects: The present invention can be used to continuously output constant-pressure water flow or non-continuously output water flow to simulate continuous and non-continuous water inrush disasters by setting up a water inrush simulation system. A multi-flow seepage system for fractured rock mass is set to simulate a water-conducting fracture zone. The water inrush simulation system and the multi-flow seepage system for fractured rock mass are used to carry out orthogonal experiments with water volume, water pressure, fractal dimension of broken rock mass, porosity, and opening degree of fractured rock mass as variables. The disaster mechanism of continuous high water inflow in the thick sandstone roof aquifer under strong mining is revealed, the disaster criterion of abscission water filling-underground water inrush is found, and the seepage parameters are provided for the numerical simulation of water disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0026] Figure 1 This is a schematic diagram of mine roof water inrush disaster in the Jurassic coal mining area;

[0027] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the test kettle structure of an embodiment of the present invention;

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of a test kettle body according to an embodiment of the present invention.

[0030] In the figure: 100, constant pressure water outlet unit; 110, cylinder; 112, isolation plug; 113A and 113B, cavity (where 113A represents a cavity for containing gas, and 113B represents a cavity for containing liquid water); 120, air supply unit; 121, air pump; 122, air supply pipeline; 123, first control valve; 130, water supply unit; 131, water pump; 132, water supply pipeline; 133, second control valve; 140, collection unit; 200, first warehouse; 300, second warehouse; 400, third warehouse; 500, collection unit ; 510, filtering component; 520, water collecting component; 530, weighing component; 600, computer; 610, data receiving module; 700, connecting channel; 710, pressure monitoring module; 800, test kettle body; 810, first seepage plate; 820, second seepage plate; 830, third seepage plate; 840, baffle; 850, extrusion plate; 851, guide groove; 852, sliding block; 860, vertical driving component; 870, horizontal driving component; 880, slide groove; 890, water uniforming chamber; 891, telescopic sealing plate; 900, hydraulic cylinder control module. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0032] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. In addition, the shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions of the products, and the purpose is only to illustrate the contents of the present invention.

[0034] Example 1

[0035] According to a specific embodiment of the present invention, Figure 2 As shown, the present invention provides a fractured rock mass fusion seepage test device for simulating roof water inrush, the test device comprising a water gushing simulation system, a fractured rock mass multi-flow state seepage system and a data acquisition and analysis system.

[0036] The water gushing simulation system has a constant pressure water outlet unit 100 for continuously outputting constant pressure water flow or discontinuously outputting water flow to simulate continuous water gushing and discontinuous water gushing disasters. Specifically, the constant pressure water outlet unit 100 has a cylinder 110, an air supply unit 120, a water supply unit 130 and a collection unit 140.

[0037] The cylinder 110 is arranged horizontally and has a storage space of equal diameter inside. An isolation plug 112 is slidably arranged inside the cylinder 110. The isolation plug 112 divides the space inside the cylinder 110 into two cavities, one of which 113A is used to hold gas, and the other cavity 113B is used to hold liquid water.

[0038] The gas supply unit 120 is connected to the cavity 113A in the cylinder 110 for containing gas to provide gas to the cylinder 110. The gas supply unit 120 includes an air pump 121 and an air supply pipeline 122. One end of the air supply pipeline 122 is connected to the air pump 121, and the other end is connected to the cavity 113A in the cylinder 110 for containing gas. The gas supply pipeline 122 is provided with a first control valve 123 for controlling the on and off of the gas supply pipeline 122, thereby facilitating the control of inflation into the cylinder 110.

[0039] The water supply unit 130 is connected to the cavity 113B in the cylinder 110 for containing liquid water to provide liquid water to the cylinder 110. The water supply unit 130 includes a water pump 131 and a water supply pipe 132. One end of the water supply pipe 132 is connected to the water pump 131, and the other end is connected to the cavity 113B in the cylinder 110 for containing liquid water. The water supply pipe 132 is provided with a second control valve 133 for controlling the on and off of the water supply pipe 132, so as to facilitate the control of filling water into the cylinder 110. The air supply unit 120 and the water supply unit 130 cooperate with each other. When the water pressure in the cylinder 110 decreases due to outflow, the air supply unit 120 promptly provides gas to the cylinder 110. The air pressure in the cylinder 110 will push the isolation plug body 112 to move toward the side of the water-containing cavity 113B, thereby ensuring that the water supply unit 130 connected to the fractured rock multi-flow state seepage system provides constant pressure water flow to the fractured rock multi-flow state seepage system. Among them, when it is necessary to continuously output a constant-pressure water flow, the air pump 121 needs to continuously stabilize the pressure while the water pump 131 needs to continuously inject water, so as to form a continuously high-pressure and constant-pressure, nearly infinite water source; when it is necessary to output a non-continuous water flow, the water pump 131 first fills the cavity 113B in the cylinder 110 for holding water with water, and then loads the cavity 113A to a certain pressure through the air pump 121 and stops supplying air, and then opens the water outlet of the cylinder 110 to discharge the water, and the water pump 131 stops supplying water during the discharge process.

[0040] The collection unit 140 is arranged on the cylinder 110 and has multiple sensors inside for collecting the water pressure, water flow rate and water outlet time in the cylinder 110. The collection unit 140 is connected to the data collection and analysis system to transmit the collected data to the data collection and analysis system for subsequent analysis.

[0041] The multi-flow state seepage system of fractured rock mass includes a first bin 200 for containing weakly cemented soft rock, a second bin 300 for containing fractured rock mass and a third bin 400 for containing broken rock mass, which are connected in sequence. The first bin 200 is connected to the water outlet on the cylinder 110 in the water gushing simulation system, and the water flow in the water gushing simulation system passes through the first bin 200, the second bin 300 and the third bin 400 in sequence before being discharged.

[0042] In this embodiment, a tubular connecting channel 700 is provided between the first warehouse body 200 and the second warehouse body 300, and the first warehouse body 200 and the second warehouse body 300 are connected through the connecting channel 700. The connecting channel 700 has a large diameter, and can allow weakly cemented soft rock particles in the first warehouse body 200 to pass through. A pressure monitoring module 710 is installed on the connecting channel 700 to detect the pressure of the water flow after flowing out of the first warehouse body 200.

[0043] The fractured rock multi-flow state seepage system has a test kettle 800, a first seepage plate 810 is fixedly arranged at the bottom of the test kettle 800, a second seepage plate 820 is slidably arranged above the first seepage plate 810 along the axial direction of the test kettle 800, and the space between the first seepage plate 810 and the second seepage plate 820 and the space enclosed by the inner side wall of the test kettle 800 constitute the above-mentioned third bin 400. After the fractured rock is placed in the third bin 400, the opening degree of the sample can be determined by adjusting the position of the second seepage plate 820, thereby controlling the fractal dimension and porosity of the fractured rock.

[0044] A third seepage plate 830 is slidably arranged above the second seepage plate 820 along the axial direction of the test kettle body 800, two baffles 840 are arranged in parallel below the third seepage plate 830, the top of the baffle 840 is fixedly connected to the third seepage plate 830, and the bottom of the baffle 840 is fixedly connected to the second seepage plate 820, and an extrusion plate 850 is slidably arranged between the two baffles 840, and the space enclosed by the second seepage plate 820, the third seepage plate 830, the two baffles 840 and the extrusion plate 850 constitutes the second bin 300. When the extrusion plate 850 is pushed in the radial direction, the volume of the second bin 300 can be changed, and the opening degree of the fractured rock mass sample in the second bin 300 can be determined. That is, the volume of the second bin 300 is variably arranged above the third bin 400 and is connected to the third bin 400 through the second seepage plate 820. The second bin 300 is designed in this way so that it can change position following the volume change of the third bin 400, thereby ensuring the interlayer relationship between the fractured rock mass and the broken rock mass. However, the volume changes of the third bin 400 and the second bin 300 can be independent of each other and will not affect each other, thereby facilitating the individual adjustment of the states of the fractured rock mass and the broken rock mass during the test.

[0045] The data acquisition and analysis system includes a collection unit 500 disposed below the third warehouse 400 and an analysis unit connected to the collection unit 500. The collection unit 500 has a filter component 510, a water collection component 520 and a weighing component 530 arranged in sequence from top to bottom. The filter component 510 is a multi-layer filter net, and the filter net is fixedly arranged above the water collection component 520 to filter rock particles in the seepage water flowing out of the fractured rock multi-flow state seepage system. The water collection component 520 is a cylindrical water container for holding the water flow filtered by the filter component 510. The weighing component 530 is an electronic scale that can realize real-time weighing and is used to weigh the weight of the water flow collected in the water collection component 520 in real time. The analysis unit is an existing analysis software installed in the computer 600. The analysis software is electrically connected to the collection unit 140 of the water gushing simulation system, the pressure monitoring module 710 of the fractured rock multi-flow state seepage system and the weighing component 530 to analyze the seepage parameters of water disasters. The data from the acquisition unit 140 and the pressure monitoring module 710 are first transmitted to the data receiving module 610 , and then transmitted to the analysis unit through the data receiving module 610 for data analysis.

[0046] Furthermore, in order to facilitate the adjustment of the volume of the third warehouse body 400 and the second warehouse body 300, a vertical driving component 860 is provided above the second seepage plate 820, which is used to drive the second seepage plate 820 to slide in the vertical direction to reduce the volume of the third warehouse body 400. A horizontal driving component 870 is provided on one side of the extrusion plate 850, which is used to drive the extrusion plate 850 to move in the horizontal direction to reduce the volume of the second warehouse body 300. In this embodiment, the vertical driving component 860 and the horizontal driving component 870 are both hydraulic cylinders, which are connected to an external hydraulic cylinder control module 900, and the hydraulic cylinder control module 900 is electrically connected to the computer 600, and the control of the hydraulic cylinder action is finally realized through the control driver inside the computer 600. Then the vertical driving component 860 and the horizontal driving component 870 are controlled to act.

[0047] Furthermore, a plurality of slide grooves 880 are arranged at intervals along the vertical direction on the side wall of the test kettle body 800, and the second seepage plate 820 and the third seepage plate 830 are respectively provided with protrusions adapted to the shape of the slide grooves 880, and the protrusions are arranged in the slide grooves 880 to achieve balanced sliding of the second seepage plate 820 and the third seepage plate 830 in the vertical direction.

[0048] Furthermore, in order to improve the accuracy of the experimental data, a telescopic sealing plate 891 is arranged above the third seepage plate 830. The top of the telescopic sealing plate 891 is fixedly connected to the top of the test kettle body 800, and the bottom end is fixedly connected to the top of the third seepage plate 830. The telescopic sealing plate 891 can be telescoped and extended as the third seepage plate 830 moves up and down, so that the seepage water on the top of the third seepage plate 830 can completely flow into the third bin body 400 through the second bin body 300.

[0049] In addition, the second penetration plate 820 and the third penetration plate 830 are respectively provided with guide grooves 851 in the horizontal direction on one side facing the extrusion plate 850, and the top and bottom ends of the extrusion plate 850 are respectively provided with sliding blocks 852 that are adapted to the shape of the guide grooves 851. The sliding blocks 852 are arranged in the guide grooves 851 and slide along the guide grooves 851 to facilitate the smooth sliding of the extrusion plate 850.

[0050] Furthermore, in order to make the water seeping out of the second bin body 300 flow into the third bin body 400 as evenly as possible, a uniform water chamber 890 is fixedly provided below the second infiltration plate 820, so that the water in the second bin body 300 first flows into the uniform water chamber 890, and then evenly infiltrates into the third bin body 400 through the infiltration plate at the bottom of the uniform water chamber 890.

[0051] The test operation steps of the test device provided by the present invention are as follows:

[0052] S1. The second bin 300 and the third bin 400 in the test kettle 800 are respectively filled with fractured rock mass and broken rock mass.

[0053] S2. The second infiltration plate 820 and the squeezing plate 850 are pushed respectively by controlling the vertical driving component 860 and the horizontal driving component 870 to adjust the porosity of the samples in the second chamber 300 and the third chamber 400 .

[0054] S3. Load weakly cemented soft rock of a specified size into the first silo 200 .

[0055] S4. Using the constant pressure water discharge unit 100 of the water gushing simulation system, conduct the continuous and non-continuous water gushing multi-flow state water hazard tests of fractured rock mass.

[0056] S5. The analysis unit analyzes the collected data to obtain numerical simulation seepage parameters of water disasters.

[0057] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A fractured rock mass fusion seepage test device simulating roof water inrush, characterized in that: include: A water gushing simulation system, the water gushing simulation system having a constant pressure water outlet unit (100) for continuously outputting a constant pressure water flow or non-continuously outputting a water flow to simulate continuous water gushing and non-continuous water gushing disasters; A fractured rock mass multi-flow state seepage system, the fractured rock mass multi-flow state seepage system comprising a first bin (200) for containing weakly cemented soft rock, a second bin (300) for containing fractured rock mass and a third bin (400) for containing broken rock mass, which are sequentially connected and arranged, the first bin (200) being connected to a water outlet of a water gushing simulation system, and water in the water gushing simulation system is discharged after passing through the first bin (200), the second bin (300) and the third bin (400) in sequence; A data acquisition and analysis system, the data acquisition and analysis system comprising a collection unit (500) arranged below a third chamber (400) and an analysis unit connected to the collection unit (500), the collection unit (500) having a filtering component (510), a water collecting component (520) and a weighing component (530) arranged in sequence from top to bottom, the filtering component (510) being arranged above the water collecting component (520) for filtering rock particles in seepage water flowing out of a fractured rock mass multi-flow state seepage system, the water collecting component (520) for containing water flow filtered by the filtering component (510), the weighing component (530) for weighing the weight of water flow collected in the water collecting component (520), and the analysis unit being electrically connected to a water gushing simulation system, a fractured rock mass multi-flow state seepage system and the weighing component (530) for analyzing seepage parameters causing water damage.

2. The fractured rock mass fusion seepage test device for simulating roof water inrush according to claim 1 is characterized in that: The constant pressure water outlet unit (100) comprises: A cylinder (110), wherein the cylinder (110) is arranged horizontally, and an isolation plug (112) is slidably arranged in the cylinder (110), wherein the isolation plug (112) divides the storage space in the cylinder (110) into two cavities (113A, 113B), wherein one cavity (113A) is used to contain gas, and the other cavity (113B) is used to contain liquid water, and the cavity (113B) used to contain liquid water is connected to a multi-flow seepage system of a fractured rock mass; A gas supply unit (120), the gas supply unit (120) being connected to a cavity in the cylinder (110) for containing gas so as to supply gas into the cylinder (110); A water supply unit (130), the water supply unit (130) being connected to a cavity in the cylinder (110) for containing liquid water so as to provide liquid water into the cylinder (110); A collection unit (140) is provided on the cylinder (110) and is used to collect the water pressure, water flow rate and water outlet time of the cylinder (110); the collection unit (140) is connected to the analysis unit.

3. The fractured rock mass fusion seepage test device for simulating roof water inrush according to claim 2 is characterized in that: The gas supply unit (120) comprises an air pump (121) and an air supply pipeline (122); one end of the air supply pipeline (122) is connected to the air pump (121), and the other end is connected to a cavity (113A) in the cylinder (110) for containing gas; and a first control valve (123) for controlling the on-off of the air supply pipeline (122) is provided on the air supply pipeline (122).

4. The fractured rock mass fusion seepage test device for simulating roof water inrush according to claim 2, characterized in that: The water supply unit (130) comprises a water pump (131) and a water supply pipeline (132); one end of the water supply pipeline (132) is connected to the water pump (131), and the other end is connected to a cavity (113B) in the cylinder (110) for containing liquid water; a second control valve (133) for controlling the on-off of the water supply pipeline (132) is provided on the water supply pipeline (132).

5. The fractured rock mass fusion seepage test device for simulating roof water inrush according to any one of claims 1 to 4, characterized in that: A connecting channel (700) is provided between the first warehouse body (200) and the second warehouse body (300), and the first warehouse body (200) and the second warehouse body (300) are connected through the connecting channel (700).

6. The fractured rock mass fusion seepage test device for simulating roof water inrush according to any one of claims 1 to 4, characterized in that: The fractured rock mass multi-flow state seepage system comprises a test kettle (800), wherein a first seepage plate (810) is fixedly arranged at the bottom of the test kettle (800), a second seepage plate (820) is slidably arranged above the first seepage plate (810), and the space between the first seepage plate (810) and the second seepage plate (820) and the space enclosed by the inner side wall of the test kettle (800) constitute the third bin (400); the second bin (300) is variably arranged above the third bin (400) and is connected to the third bin (400) through the second seepage plate (820).

7. The fractured rock mass fusion seepage test device for simulating roof water inrush according to claim 6, characterized in that: A third seepage plate (830) is slidably arranged above the second seepage plate (820), and two baffles (840) are arranged in parallel below the third seepage plate (830). The top end of the baffle (840) is fixedly connected to the third seepage plate (830), and the bottom end of the baffle (840) is fixedly connected to the second seepage plate (820). An extrusion plate (850) is slidably arranged between the two baffles (840), and the space enclosed by the second seepage plate (820), the third seepage plate (830), the two baffles (840) and the extrusion plate (850) constitutes the second storage body (300).

8. The fractured rock mass fusion seepage test device for simulating roof water inrush according to claim 7, characterized in that: A vertical driving component (860) is provided above the second penetration plate (820) for driving the second penetration plate (820) to slide in the vertical direction to change the volume of the third bin body (400); a horizontal driving component (870) is provided on one side of the extrusion plate (850) for driving the extrusion plate (850) to move in the horizontal direction to change the volume of the second bin body (300).

9. The fractured rock mass fusion seepage test device for simulating roof water inrush according to claim 7, characterized in that: A plurality of slide grooves (880) are arranged at intervals along the vertical direction on the side wall of the test kettle body (800); the second seepage plate (820) and the third seepage plate (830) are respectively provided with protrusions that are adapted to the shape of the slide grooves (880); the protrusions are arranged in the slide grooves (880) to achieve balanced sliding of the second seepage plate (820) and the third seepage plate (830) in the vertical direction.

10. The fractured rock mass fusion seepage test device for simulating roof water inrush according to claim 7, characterized in that: At least one of the second penetration plate (820) and the third penetration plate (830) is provided with a guide groove (851) in a horizontal direction on one side facing the extrusion plate (850); a sliding block (852) matching the shape of the guide groove (851) is provided on the extrusion plate (850); the sliding block (852) is arranged in the guide groove (851) and slides along the guide groove (851).

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