Detection of coal fire by deep learning using ground penetrating radar

Gao, Rongxiang; Zhu, Hongqing; Liao, Qi; Qu, Baolin; Hu, Lifen; Wang, Haoran

doi:10.1016/j.measurement.2022.111585

Cited by 17 publications

(3 citation statements)

References 37 publications

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“…The negative value is tensile stress, and the positive value is compressive stress. The stress formula at any point of the overlying strata in the shallow coal seam fire area is Equation (6).…”

Section: Breaking Model Of Overlying Strata Under Thermal-mechanical ...mentioning

confidence: 99%

“…Coal fires mainly occur in areas with arid climates and shallow buried thick coal seams 4 . At present, the research on coal fires mainly focuses on the field of detection and control 5–8 . The occurrence mechanism and development law of coal fire have not been accurately mastered 9 .…”

Section: Introductionmentioning

confidence: 99%

“…4 At present, the research on coal fires mainly focuses on the field of detection and control. [5][6][7][8] The occurrence mechanism and development law of coal fire have not been accurately mastered. 9 Coal mining activities change the stress balance of coal seams, 10 forming a large number of cracks that provide a good oxygen supply channel and heat storage environment for coal spontaneous combustion.…”

Section: Introductionmentioning

confidence: 99%

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Breaking law of overlying strata in shallow coal seam fire area under thermal–mechanical coupling effect

Zhu

Gao

et al. 2023

Energy Science & Engineering

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The cracks formed by the breaking and collapse of the overlying strata are the oxygen supply channels for the continuous combustion of coal fires. The development of cracks is of great significance for determining the scope of the fire area and controlling the fire efficiently and accurately. To study the development law of cracks, a breaking model of the overlying strata in the shallow coal seam fire area is established on the basis of beam theory considering the coupling effect of gravity load and temperature field. The physical model of the coal fire is established based on the similarity principle.The temperature data from rock strata in the model are monitored by the infrared thermal imager. The dynamic distribution function of the roof temperature field is obtained by fitting. According to the breaking model theory, the position of the maximum tensile stress on the roof of the shallow fire area is the middle of the lower surface. The theoretical calculation value of the first breaking distance of the roof is 0.575 m, which is consistent with the experimental results of the physical model. The maximum tensile stress of the roof under the thermal-mechanical coupling is slightly less than that under the load only. For shallow coal seams, the thermal stress generated by the coal fire increases the first breaking distance of the roof.

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Section: Breaking Model Of Overlying Strata Under Thermal-mechanical ...mentioning

confidence: 99%