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- W4319788085 abstract "Abstract 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." @default.
- W4319788085 created "2023-02-11" @default.
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- W4319788085 date "2023-03-01" @default.
- W4319788085 modified "2023-10-18" @default.
- W4319788085 title "Breaking law of overlying strata in shallow coal seam fire area under thermal–mechanical coupling effect" @default.
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- W4319788085 doi "https://doi.org/10.1002/ese3.1420" @default.
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