Visual simulation apparatus and method for migration of solid phase and liquid phase of mining overburden rock

Abstract

The invention discloses a visual simulation apparatus and method for migration of a solid phase and a liquid phase of mining overburden rock. The visual simulation apparatus and method are especially applicable to simulation and reproduction of dynamic changing processes of opening and closing of mining gaps of upper confining beds and flow field evolution during water-preserved mining of a mine. An experimental system used in the invention comprises the following five parts: a model support, a water injection device (2), an automatic mining control system, a water level continuous monitoring system and a visual system. The method provided by the invention comprises the following steps: 1) laying an experimental model; 2) simulating underground water; 3) injecting water into the model; 4) simulating excavation process; 5) recording and analyzing changes of the water level in the model in real time in virtue of the water level continuous monitoring system; and 6) observing experimental phenomena by using the visual system. The visual simulation apparatus provided by the invention has a compact structure and good experiment maneuverability; and a novel approach is provided for visualization of simulation of overburden rock gaps and underground water flow field evolution during mining of underground layered mineral resources.

Description

technical field [0001] The invention relates to the technical field of mining process simulation equipment, in particular to a visualization simulation device and method for mining overburden solid-liquid two-phase migration. Background technique [0002] The loss of water resources in the process of mining and its hidden dangers to the safety of mining space are the key issues that must be solved in mine production and ecological environment protection in mining areas. The laboratory conducts solid-liquid coupling simulation experiments to study the formation, expansion, and final form of cracks in the overlying water-resisting rock formation (group) during the mining process and the evolution of the water flow field during this process. The experiment is dedicated to clarifying the loss mechanism of water resources in the process of mining, eliminating potential safety hazards in the mining space, and providing a theoretical basis for safe production in mines and ecologica...

AI Technical Summary

Problems solved by technology

Among them, water conservation mining is an important technical means to realize green mining in mines. However, there are still some problems in the existing physical similarity experimental system and method for simulating water conservation mining. The dynamic change process of opening and closing of layer mining fractures cannot be clearly presented and captured, and the experimental phenomenon is not clear; (2) During the simulation experiment, the monitoring of the groundwater level and the observation of the dynamic evolution process of the water flow field are not clear; ( 3) During the simulation experiment, ordinary sealing materials (such as butter, Vaseline) cannot achieve a good unity in sealing and perspective, resulting in poor sealing and interference with the experimental phenomenon; or poor visibility of the experiment, making it difficult to The outside world can clearly observe the opening and closing process of mining fissures in the water-resisting layer, which brings difficulties to experimental operations or phenomenon observations

[0003] At the same time, there are also some defects and deficiencies in the specific operation of the experiment and the observation process of the phenomenon, which are obviously manifested as: (1) In the existing experiment, the simulated mining layer is laid with similar materials, and due to manual excavation during the experiment excavation The movement causes the model frame to vibrate, which may easily cause water leakage and cause the experiment to fail

At the same time, manual excavation and chiseling can easily cause excessive or insufficient excavation of the mining layer, which affects the authenticity and reliability of the experimental results; , because the model topsoil gravel has a certain degree of water absorption, after adding water, the simulated phreatic water level is often higher than the actual required water level due to the infiltration of water in the gravel in the later stage, which affects the experimental results; (3) In the existing experiments, the numerical change of the phreatic water level Manually read, there is a large reading error, which affects the accuracy of the experiment, and cannot be continuously monitored; (4) In the existing experiments, ink or dyes containing pigments are usually used as tracers

If too much tracer is added, there will be a large amount of residue after the water flows or evaporates, which will interfere with the experimental phenomenon; if too little is added, the color of the water will be too light, which will affect the observation and presentation of experimental results

[0004] The existence of these problems has seriously affected the actual operability of such simulation experiments and the authenticity and reliability of experimental results, and has also brought troubles to the research in this scientific field. Therefore, it is urgent to propose a new physical simulation experiment system and method. to solve such problems

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