Coal gangue leachate melting and infiltration soil column simulation system and characteristic parameter determination method

Abstract

The invention provides a coal gangue leachate melting and infiltration soil column simulation system. The coal gangue leachate melting and infiltration soil column simulation system comprises a bottom component, one or more serial-connection soil column experiment standard components which are connected onto the bottom component and a coal gangue leachate melting and infiltration supplementing simulation device arranged at the top of the soil column experiment standard components; a soil filling component of the simulation system is composed of a plurality of standard components and is automatically controlled by a computer; the determination of melting and infiltration characteristic parameters and hydrodynamic dispersion coefficients of four shapes of sources to be melted, prepared by coal gangue leachate, is realized based on the system; in a determination process, a large-diameter undisturbed soil column is used for carrying out a laboratory experiment, and testing steps and a calculation method are provided; the coal gangue leachate melting and infiltration supplementing simulation device can realize a coal gangue leachate melting and low-temperature infiltration simulation process through a temperature adjusting element and a cold-hot integrated metal element; the coal gangue leachate melting and infiltration soil column simulation system has the characteristics of high practicability, good utilization effect and convenience for popularization and utilization.

Description

technical field [0001] The invention belongs to the field of environmental protection in mining areas, and in particular relates to a simulation system for ablation of coal gangue leachate into seepage soil columns and a method for measuring characteristic parameters. Background technique [0002] Precipitation mainly refers to rainfall and snowfall. Moisture reaches the ground from the atmosphere in various forms. Other forms of precipitation include dew, frost, hail, etc. Precipitation is an important part of the hydrological cycle and the basic source of water for human beings. Precipitation data is the basis for analyzing reasonable flood and drought conditions and basin drought conditions, and is also the basis for the planning, design, management and application of water resources development and utilization, such as flood control, power generation, irrigation, etc. The process of precipitation infiltration to recharge groundwater is one of the most basic links in the...

AI Technical Summary

Problems solved by technology

No matter what kind of soil column is used for the test, there are still the following problems: ① The length of the single section of the soil-loading component in the soil column experiment is large, and the convenience is poor, so that the installation of the soil column is difficult, which causes inconvenience to the cleaning of the instrument; ② The installation of monitoring equipment is cumbersome and requires Drill holes in the soil column to destroy its structure; ③The monitoring equipment is generally manual observation, which makes the experiment accuracy low and artificial

However, due to the differences in the composition, structure and environment of unsaturated soil, it is difficult for the small specimens used in indoor experiments to represent the actual situation of the real soil.

[0006] CN103344538A discloses a multifunctional permeameter for unsaturated soil and its testing method. The water replenishing device is a Martens bottle, and the Marble bottle includes a water replenishing bottle whose upper and lower parts are sealed and a water replenishing bottle inserted vertically from top to bottom. Conduit, the water inlet is opened on the upper side wall of the water replenishment bottle, and the exhaust port and the water supply port are opened on the bottom side wall of the water replenishment bottle. This patent can only perform simple precipitation infiltration simulation. For more complicated coal gangue Leachate ablation and infiltration simulation This patent cannot be realized and does not give such enlightenment

[0007] CN105181531A discloses an indoor simulation system for water migration of loess and a method for measuring characteristic parameters. Its rainfall simulation system includes a rainfall trough embedded in the top of the indoor simulation system box and a circular rainfall hole arranged at the bottom of the rainfall trough. The rainfall The top of the tank is provided with a pressure control pipe in the rainfall tank and a water inlet pipe connected to an external water source. The water inlet pipe is provided with a water inlet solenoid valve, a water inlet pump and a first flow sensor for real-time detection of rainfall. Pressure control solenoid valve and pressure sensor are arranged on the pressure control pipe in the described rain trough, the end of the pressure control pipe in the described rain trough is connected with an air compressor, the top inner wall of the described rain trough is provided with a The water level sensor for real-time detection of the water level, the diameter of the rainfall hole is 0.5mm ~ 1mm; this patent can only simulate precipitation infiltration, and this patent cannot realize the simulation of coal gangue leachate ablation infiltration

[0008] CN103604734A discloses an unsaturated soil rainwater infiltration simulation system with controllable rain intensity. The equipment realized by the controllable rain intensity is as follows: the water supply water tank is provided with a water supply pump, and the water supply pump connects the overflow water with a water supply pipe. tank, the overflow water tank is connected to the water supply tank with an overflow pipe, and a raindrop generator is also connected to the bottom of the overflow water tank, and the raindrop generator includes several conduits communicating with the bottom of the overflow water tank. A regulating valve is arranged on the conduit, and a needle is arranged on the top of the conduit, and the needle is fixed on the fixed plate, and a funnel is arranged on the lower surface of the fixed plate, and the outlet of the funnel is located above the opening on the top of the model box. This patent It can only realize the rain intensity controllable infiltration simulation during rainfall, and this patent cannot realize the simulation of coal gangue leachate ablation and infiltration

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