Aerial remote sensing detection

Aerial remote sensing is a remote sensing method between space remote sensing and ground survey, which mainly includes black-and-white photography, color photography, color infrared photography, multi-band photography, thermal infrared scanning and aerial hyperspectral remote sensing. It has the characteristics of high spatial resolution and remarkable effect.

Aerial thermal infrared remote sensing measurement is the most successful method to detect coal fire area, which is mainly used to delineate the thermal anomaly range in detail and distinguish the fire area from the non-fire area with high detection accuracy (Figure 3? 1? 1)。 The key technologies of aerial thermal infrared extraction of underground fire area information mainly include: synchronous measurement of aerial remote sensing flight, temperature conversion of thermal infrared image, comprehensive interpretation of underground coal fire space state, extraction of underground coal fire abnormal information, etc. The main functions of coal fire detection are as follows.

Fig. 3- 1- 1 aerial thermal infrared image of newborn fire area in Rujigou coalfield, Ningxia.

(According to BRSC 1997)

(1) Aerial hyperspectral remote sensing. High-resolution aerial hyperspectral remote sensing images can detect coal seam distribution, mineral characteristics of overlying strata, fracture development degree, mining subsidence area and combustion environment of coal fire area, and delineate combustion aerodynamic system, combustion area, burnout area and burnout area.

(2) Aerial thermal infrared photography. Detect the normal field, abnormal field and coal injection field of the ground thermal field, and delineate the combustion center, combustion cracks and combustion system. , and fill in the temperature map of coal fire area.

(3) Aerial digital photography remote sensing is mainly based on aerial digital camera and POS system, and large-scale geological map of fire area is filled in, and ecological geological environment investigation of fire area is carried out.