Establishment technology of stratified rock mass ground temperature vertical conduction-convection model

Abstract

The invention discloses an establishment technology of a stratified rock mass ground temperature vertical conduction-convection model, which is characterized by comprising the following steps of: 1, establishing a one-dimensional mathematical model of vertical temperature distribution; 2, according to the distribution forms of a conducting layer and a troposphere, giving a stratified rock mass ground temperature vertical conduction-convection model temperature distribution equation; 3, deriving an iterative relation between the temperature value of each middle layer and the known temperature of the upper surface and the lower surface of the model by utilizing the principle of an iterative method and the idea of a catch-up method; 4, substituting the obtained iterative relational expression into a temperature distribution equation to obtain a general formula of the ground temperature and the burial depth; 5, performing parameter analysis on the general formula by using Matlab software to obtain a relationship between the distribution of the ground temperature in the vertical direction and the burial depth under different conditions; and 6, verifying a calculation result of the model, substituting parameters of an actual measurement hole into the model for calculation, comparing the calculation result with an actual temperature measurement result, and inversely calculating the vertical seepage velocity of the aquifer. According to the invention, a stratified rock mass ground temperature vertical conduction-convection model is established by using a transfer rule of a temperature field in a stratified rock mass and an aquifer. The model is high in universality, the model calculation process is simple and rapid, and the result precision is high.

Description

technical field [0001] The invention relates to the field of geothermal anomaly research, in particular to a technology for establishing a layered rock mass geothermal vertical conduction-convection model. Background technique [0002] With the gradual increase in the depth and scope of mine mining and the increase in the heat release and diffusion of various heat dissipation sources, the number of high-temperature mines is increasing, and the problem of geothermal disasters in deep mines is becoming more and more serious. In 1954, my country began to observe and study the geothermal field of the mine field and the surrounding rock temperature of the mine roadway. By the 1970s, the country's mine geothermal conditions were investigated and studied. In recent years, with the in-depth research on the temperature field and cooling mechanism, the underground ground temperature test data has gradually increased, and the thermal environment control measures have also been continuo...

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Problems solved by technology

[0004] At present, the geothermal curve is mainly measured by actual drilling, which requires a lot of manpower and material resources, and the measured geothermal curve is greatly disturbed by drilling, which may be different from the actual temperature curve distribution.

It is an effective method to adopt the vertical conduction-convection mathematical model of layered rock mass geothermal, but there is no patent report on the technology of calculating the geothermal curve based on the thermodynamic parameters of the rock formation measured in the system.

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