An experimental device and method for simulating ore-forming fluid migration and accumulation process

Abstract

The present application relates to a kind of ore-forming fluid transport and accumulation process simulation experimental device and method, belong to deposit geological technical field.The device is used to simulate the migration path of ore-forming fluid in the internal fault fold structure, transport and accumulation process, the spatial distribution of the formation of ore body / mineralized zone and ore-forming characteristics, explore the occurrence regularity of the internal structure system of ore body / mineralized zone, provide theoretical reference for actual ore body mining.Through systematic experimental research, more comprehensive and profound understanding is provided for deposit geological theory research and practical operation.In actual mineral exploration and development, the use of this simulation device helps to analyze and predict favorable exploration targets and target area, and provides more scientific and reliable technical support for mineral exploitation.

Description

Technical Field

[0001] This invention belongs to the field of mineral deposit geology technology and relates to an experimental device and method for simulating the transport and accumulation process of ore-forming fluids. Background Technology

[0002] Fault-fold structures are closely related to the distribution of ore bodies / mineralization zones. Ore-guiding faults, ore-distributing faults, and interlayer fractures formed during fold deformation are all important channels for ore fluid migration. Understanding the laws governing ore fluid migration and precipitation can help people to have a deeper understanding of the formation and distribution patterns of ore bodies / mineralization zones, and at the same time, make more accurate predictions of the distribution patterns of ore bodies / mineralization zones, providing a scientific basis for mineral deposit development. Therefore, conducting simulation experiments on the migration, accumulation, and precipitation processes of ore fluids to understand the distribution patterns of ore bodies / mineralization zones within the tectonic system is of great significance.

[0003] Currently, the study of the precipitation process of ore-forming fluids within tectonic systems has attracted much attention. Understanding the migration and precipitation patterns of ore-forming fluids within fault-fold tectonic systems can help provide a more scientific basis for mine development and reduce exploration risks.

[0004] Therefore, there is a need to provide an experimental apparatus and method to simulate the migration and accumulation process of ore-forming fluids, in order to conduct simulation experiments on the migration and accumulation of ore-forming fluids within fault-fold structures. By observing the patterns of ore-forming fluid migration and accumulation through these experiments, a richer and more intuitive theoretical basis can be provided for the study and prediction of mineralization patterns under specific conditions, improving the accuracy of ore deposit prediction and making the basis for mine development more scientific. Summary of the Invention

[0005] This invention aims to provide an experimental apparatus and method for simulating the migration and accumulation process of ore-forming fluids. By combining the experimental apparatus and method, the migration and accumulation patterns of ore-forming fluids in the fault-fold structure system can be simulated, thereby providing a richer and more intuitive theoretical basis for the prediction and research of mineralization patterns.

[0006] To achieve the above objectives, the present invention provides a simulation experimental device for the transport and accumulation process of ore-forming fluids. The simulation experimental device includes a top cover, a box body, a partition, an electric heating wire, and a liquid inlet pipe. The box body has a top-opening structure, and the top of each side plate of the box body is provided with a flange structure. Bolt holes are provided on the top cover and the flange structure. The top cover and the box body are connected by bolts to close the box body. The partition is parallel to the bottom plate of the box body and is fixedly installed inside the box body. The electric heating wire is fixedly installed in the partition formed by the partition and the bottom plate of the box body. The liquid inlet pipe extends through the rear side wall of the box body into the box body to deliver liquid into the box body. Multiple liquid inlets are provided on the side wall of the liquid inlet pipe, and a pressure injection port is provided on the top cover.

[0007] Preferably, the front side of the housing is made of a transparent material.

[0008] Preferably, the simulation experimental apparatus further includes a pressure gauge mounted on the top cover to measure the pressure inside the chamber.

[0009] Another aspect of the present invention provides a simulation experimental method for the transport and accumulation process of ore-forming fluids, the experimental method comprising the following steps:

[0010] S1: Simulated faults, folds, and surrounding rock are laid in the space above the partition inside the box, with the liquid inlet pipe positioned at the bottom of the fault during the laying process. The liquid flowing out of the liquid inlet pipe flows from the bottom of the fault to other parts of the fault and folds.

[0011] S2: Prepare the simulated ore-forming fluid and pour it into the storage tank.

[0012] S3: Close the top cover to the box body and fix it with bolts, while pressurizing the box body through the injection port.

[0013] S4: Turn on the electric heating element to heat the simulated fault, fold, and surrounding rock in step S1 to the required temperature.

[0014] S5: Turn on the constant flow pump and inject the simulated ore-forming fluid from the storage tank into the faults and folds in step S1 through the inlet pipe. During this process, the electric heating wire continues to heat the simulated faults, folds, and surrounding rock to the required temperature. After the simulated ore-forming fluid flows in, it is heated so that the simulated ore-forming fluid also has the same temperature as the simulated faults, folds, and surrounding rock.

[0015] S6: Observe the simulated migration process of ore-forming fluids in faults and folds, as well as the simulated precipitation process of ore-forming fluids in folds.

[0016] Preferably, in step S1, the fault and surrounding rock are filled with lime sand, and the folds are filled with dyed lime sand containing NaHS. The fault and folds, the folds and surrounding rock, and the fault and surrounding rock are separated by wire mesh and clay, and the fault and folds are in a connected state. The simulated ore-forming fluid flows from the bottom of the fault and can enter the folds through the fault.

[0017] Preferably, in step S2, the simulated ore-forming fluid includes a ZnCl2 solution with a concentration of 1000 ppm and a NaCl solution with a concentration of 2 mol / L. When the simulated ore-forming fluid comes into contact with the NaHS-containing lime sand, a chemical reaction occurs, producing a precipitate. Since the precipitate is white, the NaHS-containing lime sand filled with folds is dyed for easy identification. The precipitation process is the ore-forming process.

[0018] Preferably, in step S4, the simulated fault, fold, and surrounding rock are heated to 150°C or 260°C.

[0019] Preferably, in step S5, the simulated fault, fold, and surrounding rock at 150°C are heated to 215°C, and the simulated fault, fold, and surrounding rock at 260°C are heated to 360°C.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention uses a simulation experimental device to simulate the migration and accumulation process of ore-forming fluids within fault-fold structures. The device simulates the migration and accumulation of ore-forming fluids in simulated faults and folds, allowing observation of the migration process of ore-forming fluids and the accumulation process in folds, thus providing assistance in predicting mineralization patterns.

[0022] 2. The experimental device for simulating the accumulation process of ore-forming fluids inside fault-fold structures of the present invention has a relatively simple structure, is easy to use, requires less professional knowledge from users, and has a wide range of applications.

[0023] The directional terms such as "up" and "down" used in this specification are merely a way of describing the structure of the present invention. The present invention is not limited by directional terms in actual use. Attached Figure Description

[0024] Figure 1 This is a frontal view schematic diagram of the experimental setup of the present invention, simulating faults, folds, and surrounding rock.

[0025] Figure 2 This is a right-side view of the experimental apparatus of the present invention in operation.

[0026] Figure 3 This is a top view of the experimental apparatus housing of the present invention.

[0027] Figure 4 This is a schematic diagram of the liquid inlet pipe and the location of the fault in this invention.

[0028] In the diagram, 1-top cover, 2-box body, 3-partition, 4-heating wire, 5-inlet pipe, 6-pressure gauge, 7-inlet, 8-injection port, 9-storage tank, 10-fault, 11-fold, 12-surrounding rock. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments.

[0030] like Figure 1-3As shown, the simulation experimental device includes a top cover 1, a box body 2, a partition 3, an electric heating wire 4, and a liquid inlet pipe 5. The box body 2 has a top-opening structure, and the top of the side plates of the box body 2 are all provided with a flange structure. Bolt holes are opened on the top cover 1 and the flange structure. The top cover 1 and the box body 2 are connected by bolts to close the cover. The partition 3 is parallel to the bottom plate of the box body 2 and is fixedly installed inside the box body 2. The electric heating wire 4 is fixedly installed in the partition formed by the partition 3 and the bottom plate of the box body 2. The liquid inlet pipe 5 passes through the rear side wall of the box body 2 and extends into the interior of the box body 2 to deliver liquid into the interior of the box body 2. Multiple liquid inlets 7 are opened on the side wall of the liquid inlet pipe 5, and a pressure injection port 8 is opened on the top cover 1.

[0031] The front side of the box 2 is made of transparent material.

[0032] The simulation experimental device also includes a pressure gauge 6, which is installed on the top cover 1 to measure the pressure inside the chamber 2.

[0033] In the above setup, simulated ore-forming fluid is transported into the box 2 through the inlet pipe 5. When simulated faults 10, folds 11, and surrounding rock 12 are laid inside the box 2, the simulated ore-forming fluid flows within the simulated fault-fold structure. During the flow, the simulated ore-forming fluid is heated by the electric heating wire 4 to a certain temperature. When it flows to contact the limestone sand containing NaHS in the fold 11, a chemical reaction occurs, producing precipitation. The precipitation process is the ore-forming process. The entire process is a simulation of the formation of ore bodies / mineralized zones by the migration of ore-forming fluid. The process of ore-forming fluid accumulation and ore body / mineralized zone formation can be directly observed through the transparent surface of the box 2. Based on the observed actual phenomena, the formation rules of ore bodies / mineralized zones in fault-fold structure systems similar to the laid model can be summarized. If an actual fault-fold structure system similar to the laid model is encountered in the future, the ore-forming rules can be referenced for analysis to understand the actual ore body distribution, which is conducive to more accurate mineral development.

[0034] Pressure gauge 6 can be used to monitor the actual pressure inside chamber 2 during the experiment, thus facilitating pressure control within chamber 2.

[0035] Example 1

[0036] In this embodiment, the fault is filled with 60-mesh lime sand, the folds are filled with 100-mesh NaHS-dyed lime sand, and the surrounding rock is filled with 80-mesh lime sand. The simulated fault-fold structure laid inside the box 2 is as follows: Figure 1As shown in the diagram, a simulated ore-forming fluid was prepared using a 1000 ppm ZnCl2 solution and a 2 mol / L NaCl solution, and poured into a storage tank 9. The top cover 1 was then closed to the tank 2, and a pressure pump was turned on to pressurize the tank 2. The heating element 4 was then turned on to heat the simulated fault-fold structure to 150°C. A constant flow pump was then turned on, and the simulated ore-forming fluid was injected into the fault through the inlet pipe 5. The simulated ore-forming fluid flowed from the bottom of fault 10 to the top of fault 10, and flowed into fold 11 through the opening connecting fold 11 and fault 10, where it precipitated. During the flow of the simulated ore-forming fluid, the heating element 4 continued to heat the fluid. When the temperature reached 215°C, the heating element 4 was kept at a constant temperature. At this point, the simulated ore-forming fluid was also heated and reached a corresponding temperature. The flow of the simulated ore-forming fluid in the fault-fold structure system and its precipitation location within the folds were observed and recorded, thus completing the experiment.

[0037] Example 2

[0038] The experimental process in this embodiment is the same as in embodiment 1, except that: in this embodiment, when no simulated ore-forming fluid is injected into the fault 10, the laid simulated fault-fold structure is heated to 260°C, and after the simulated ore-forming fluid is injected into the fault 10, it is heated to 360°C for constant temperature.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. An experimental method for simulating the transport and accumulation process of ore-forming fluids, characterized in that: The experimental apparatus for simulating the transport and accumulation process of ore-forming fluids includes a top cover (1), a box body (2), a partition (3), an electric heating wire (4), and a liquid inlet pipe (5). The box body (2) has a top-opening structure. The top of the side plates of the box body (2) are provided with flange structures. Bolt holes are opened on the top cover (1) and the flange structures. The top cover (1) and the box body (2) are connected by bolts to cover each other. The partition (3) is parallel to the bottom plate of the box body (2) and is fixedly installed inside the box body (2). The electric heating wire (4) is fixedly installed in the partition formed by the partition (3) and the bottom plate of the box body (2). The liquid inlet pipe (5) passes through the rear side wall of the box body (2) and extends into the inside of the box body (2) to transport liquid into the inside of the box body (2). Multiple liquid inlets (7) are opened on the side wall of the liquid inlet pipe (5). A pressure injection port (8) is opened on the top cover (1). The experimental method includes the following steps: S1: Simulated faults (10), folds (11), and surrounding rock (12) are laid in the space above the partition (3) inside the box (2). During the laying process, the liquid inlet pipe (5) is located at the bottom of the fault (10). S2: Prepare the simulated ore-forming fluid and pour it into the storage tank (9); S3: Cover the top cover (1) with the box body (2) and fix it with bolts, while pressurizing the box body (2) through the injection port (8); S4: Turn on the electric heating wire (4) to heat the simulated fault (10), fold (11), and surrounding rock (12) in step S1 to the required temperature; S5: Turn on the constant flow pump and inject the simulated mineralization fluid in the storage tank (9) into the fault (10) and fold (11) in step S1 through the liquid inlet pipe (5). During this process, the electric heating wire (4) continues to heat the simulated fault (10), fold (11) and surrounding rock (12) to the required temperature. S6: Observe the migration process of simulated ore-forming fluids in faults (10) and folds (11) and the precipitation process of simulated ore-forming fluids in folds (11); In step S1, the fault (10) and the surrounding rock (12) are filled with lime sand, and the fold (11) is filled with dyed lime sand containing NaHS. The fault (10) and the fold (11), the fold (11) and the surrounding rock (12), and the fault (10) and the surrounding rock (12) are separated by wire mesh and clay. The fault (10) and the fold (11) are in a connected state. In step S2, the simulated ore-forming fluid includes a ZnCl2 solution with a concentration of 1000 ppm and a NaCl solution with a concentration of 2 mol / L.

2. The experimental method for simulating the transport and accumulation process of ore-forming fluids according to claim 1, characterized in that: The front side of the box (2) is made of transparent material.

3. The experimental method for simulating the transport and accumulation process of ore-forming fluids according to claim 1, characterized in that: The simulation experiment apparatus also includes a pressure gauge (6), which is mounted on the top cover (1) to measure the pressure inside the chamber (2).

4. The experimental method according to claim 1, characterized in that: In step S4, the simulated fault (10), fold (11), and surrounding rock (12) are heated to 150°C or 260°C.

5. The experimental method according to claim 4, characterized in that: In step S5, the simulated fault (10), fold (11), and surrounding rock (12) at 150°C are heated to 215°C, and the simulated fault (10), fold (11), and surrounding rock (12) at 260°C are heated to 360°C.

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