CN-115587497-B - Surface crack temperature field determination method, system and electronic equipment

CN115587497BCN 115587497 BCN115587497 BCN 115587497BCN-115587497-B

Abstract

The invention provides a method, a system and electronic equipment for determining a ground surface crack temperature field, which relate to the technical field of ground crack monitoring and are used for constructing a crack ground surface three-dimensional geometric model, determining a crack heat convection coefficient according to crack wind speed, determining rock-soil heat conduction quantity according to rock-soil conduction data and rock-soil physical data, determining solar radiation intensity according to solar radiation data, constructing a ground surface crack temperature field calculation model according to a crack ground surface three-dimensional geometric model, the crack heat convection coefficient, the rock-soil heat conduction quantity and the solar radiation intensity, and determining ground surface crack temperature field data in a target mining area according to the ground surface crack temperature field calculation model. According to the invention, the ground surface crack temperature field calculation model is constructed, so that the ground surface crack temperature field data in the target mining area can be monitored, data support is provided for unmanned aerial vehicle infrared monitoring equipment, and meanwhile, a basis is provided for ground surface crack evolution.

Inventors

TENG TENG
LI ZHAOLONG
XU DUO
ZHU YANZHAO
REN CHAOYANG
YI PENG
ZHU XIAOYAN

Assignees

中国矿业大学(北京)

Dates

Publication Date: 20260512
Application Date: 20221102

Claims (6)

1. A method of determining a surface fracture temperature field, comprising: Acquiring fracture data and solar radiation data in a target mining area, wherein the fracture data comprise surface fracture geometric parameters, fracture wind speed, rock-soil conduction data and rock-soil physical data; Constructing a crack earth surface three-dimensional geometric model according to earth surface geometric parameters, wherein the crack earth surface three-dimensional geometric model is used for describing earth surface soil and crack geological structures in a target mining area; Determining a crack thermal convection coefficient according to the crack wind speed; Determining rock-soil heat conduction quantity according to the rock-soil conduction data and the rock-soil physical data, wherein the rock-soil heat conduction quantity is as follows: ; wherein ρ is the soil density; k is the thermal conductivity of the soil; the wind speed of the crack is T, the temperature is T, and the time is T; is the divergence; Is the temperature increment; is the heat conduction quantity of the rock and soil; determining solar radiation intensity according to the solar radiation data, wherein the solar radiation intensity is as follows: ; In the formula, Is the intensity of solar radiation; For the intensity of the direct solar radiation absorbed by the soil, , Is the normal surface solar direct radiation intensity at the upper boundary of the atmosphere layer, gamma is a proportional constant coefficient, For the solar radiation distance of the upper boundary of the atmosphere to the ground when the sun is at the top of the sky, In order to be the solar altitude angle, Is the angle of incidence of the sun; for the total scattered radiation intensity received by the soil, , Is the scattering intensity of the sky air, C is the ratio of the intensity of sky scattered radiation to the intensity of direct radiation reaching the ground, Is the angular coefficient of the ground to the horizontal, , Is the included angle between the ground and the horizontal plane, Reflecting the radiation intensity for the earth's surface soil; , Is the ground reflectivity; Constructing a ground surface crack temperature field calculation model according to the crack ground surface three-dimensional geometric model, the crack heat convection coefficient, the rock-soil heat conduction quantity and the solar radiation intensity; and determining the surface crack temperature field data in the target mining area according to the surface crack temperature field calculation model.
2. The method of claim 1, wherein the surface fracture temperature field calculation model is constructed using Comsol with MATLAB software.
3. A method of determining a surface fracture temperature field as claimed in claim 1, the method is characterized in that the crack thermal convection coefficient is as follows: ; Wherein, the Is the crack heat convection coefficient; Is the crack wind speed.
4. A surface fracture temperature field determination system, comprising: the data acquisition module is used for acquiring crack data and solar radiation data in a target mining area, wherein the crack data comprise ground surface crack geometric parameters, crack wind speed, rock-soil conduction data and rock-soil physical data; The crack ground surface three-dimensional geometric model construction module is used for constructing a crack ground surface three-dimensional geometric model according to ground surface crack geometric parameters, wherein the crack ground surface three-dimensional geometric model is used for describing ground surface soil and crack geological structures in a target mining area; the crack heat convection coefficient determining module is used for determining a crack heat convection coefficient according to the crack wind speed; The rock-soil heat conduction quantity determining module is used for determining the rock-soil heat conduction quantity according to the rock-soil conduction data and the rock-soil physical data, wherein the rock-soil heat conduction quantity is as follows: ; wherein ρ is the soil density; k is the thermal conductivity of the soil; the wind speed of the crack is T, the temperature is T, and the time is T; is the divergence; Is the temperature increment; is the heat conduction quantity of the rock and soil; the solar radiation intensity determining module is used for determining solar radiation intensity according to the solar radiation data, wherein the solar radiation intensity is as follows: ; In the formula, Is the intensity of solar radiation; For the intensity of the direct solar radiation absorbed by the soil, , Is the normal surface solar direct radiation intensity at the upper boundary of the atmosphere layer, gamma is a proportional constant coefficient, For the solar radiation distance of the upper boundary of the atmosphere to the ground when the sun is at the top of the sky, In order to be the solar altitude angle, Is the angle of incidence of the sun; for the total scattered radiation intensity received by the soil, , Is the scattering intensity of the sky air, C is the ratio of the intensity of sky scattered radiation to the intensity of direct radiation reaching the ground, Is the angular coefficient of the ground to the horizontal, , Is the included angle between the ground and the horizontal plane, Reflecting the radiation intensity for the earth's surface soil; , Is the ground reflectivity; the ground surface crack temperature field calculation model construction module is used for constructing a ground surface crack temperature field calculation model according to the crack ground surface three-dimensional geometric model, the crack heat convection coefficient, the rock-soil heat conduction quantity and the solar radiation intensity; And the ground surface crack temperature field data determining module is used for determining ground surface crack temperature field data in the target mining area according to the ground surface crack temperature field calculation model.
5. An electronic device comprising a memory for storing a computer program and a processor that runs the computer program to cause the electronic device to perform a method of determining a surface fracture temperature field as claimed in any one of claims 1 to 3.
6. The electronic device of claim 5, wherein the memory is a readable storage medium.

Description

Surface crack temperature field determination method, system and electronic equipment Technical Field The invention relates to the technical field of ground fracture monitoring, in particular to a method, a system and electronic equipment for determining a ground fracture temperature field. Background The problem of surface cracks caused by coal exploitation is always one of main research directions of mining area collapse management, and efficient, intelligent, real-time and accurate monitoring of surface crack characteristics and morphology evolution of the surface cracks is a precondition of exploitation subsidence and surface crack management. The current research on the formation mechanism of the coal mine subsidence area ground cracks is mainly focused on the formation mechanism and the damage to the ground surface. The monitoring of the ground surface cracks is an effective means for researching the ground surface cracks, and the monitoring main direction of the ground surface cracks by the world scholars at the current stage is characterized by the shape, the size, the azimuth and the like, but the research on the temperature field of the ground surface cracks is quite a few. For example, chinese patent document CN113295843a discloses a monitoring device for mining ground cracks of shallow coal seam, which is configured to monitor the ground surface around the ground cracks in real time and transmit data to a monitoring platform by installing a ground crack monitoring device around the monitoring area, so as to identify the spatial orientation, diffusion positioning point, and size of the ground cracks. The Chinese patent document with publication number CN114155378A discloses an automatic extraction method, an automatic extraction device and a storage medium for coal mining subsidence ground cracks, and ground crack distribution and morphological characteristics are accurately obtained by arranging ground image control points and correcting ground crack monitoring areas through unmanned aerial vehicle photography for multiple measurement. The two patent monitoring devices are relatively original in arrangement, the measurement precision is low, the study of the temperature field of the ground surface cracks cannot be completed, the temperature field change of the ground surface cracks is also an important factor influencing the collapse of the coal mine, the temperature of the ground surface of the coal mine is increased under the irradiation of the sun in the daytime, the cracks generated by coal mine exploitation are communicated with the ground surface and an underground mine tunnel, a part of air quantity of mine ventilation leaks out of the ground surface from the cracks, and the temperature around the cracks is lower than the average temperature of the ground surface directly irradiated by the sun due to heat taken away by the air leakage. The temperature of the earth surface is reduced during cooling at night, and simultaneously, heat of the deep soil is transferred to the earth surface through the cracks, so that the temperature of the cracks is higher than the average temperature of the earth surface. Monitoring technology of temperature field changes of surface cracks is a problem to be solved urgently at present. Disclosure of Invention The invention aims to provide a method, a system and electronic equipment for determining a ground surface crack temperature field, which can complete monitoring of ground surface crack temperature field data in a target mining area by constructing a ground surface crack temperature field calculation model, provide data support for unmanned aerial vehicle infrared monitoring equipment and provide a basis for ground surface crack evolution. In order to achieve the above object, the present invention provides the following solutions: a method of determining a surface fracture temperature field, comprising: Acquiring fracture data and solar radiation data in a target mining area, wherein the fracture data comprise surface fracture geometric parameters, fracture wind speed, rock-soil conduction data and rock-soil physical data; Constructing a crack earth surface three-dimensional geometric model according to earth surface geometric parameters, wherein the crack earth surface three-dimensional geometric model is used for describing earth surface soil and crack geological structures in a target mining area; Determining a crack thermal convection coefficient according to the crack wind speed; determining a rock-soil heat conduction amount according to the rock-soil conduction data and the rock-soil physical data; determining solar radiation intensity according to the solar radiation data; Constructing a ground surface crack temperature field calculation model according to the crack ground surface three-dimensional geometric model, the crack heat convection coefficient, the rock-soil heat conduction quantity and the solar radiation intensity; and determining the