Abstract
In order to work out the calculation method of supports’ working resistance for mining steeply inclined coal seam, taking panel 1201 in Dayuan coal mine as engineering background, the distribution rules of lead abutment pressure and overlying strata movement in the upper, middle, and lower face were studied through numerical simulation, theoretical analysis, and field measurement. Numerical simulation shows that the key area of controlling surrounding rock movement lies in the middle and upper face, where rock strata behaviors are drastic. The design formula of immediate roof and basic roof are provided based on broken roof’s movement features along inclination. Based on the difference of surrounding rock structure and its movement forms along inclination, the equations of supports’ working resistance, which fits upper, middle, and lower section, are given. Site observed results demonstrate that dynamic load in the upper and middle face is evident and supports’ working resistance is larger than that in upper face, which coincides with theoretical calculation.
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The financial supports from the National Natural Science Foundation of China (No. 51874113) and the Joint Funds of the National Natural Science Foundation of China (No.U1361209) are greatly appreciated.
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Responsible Editor: Murat Karakus
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Li, X., Sun, L. & Zhao, Q. Determination of supports’ rational working resistance in steeply inclined caving face. Arab J Geosci 14, 1087 (2021). https://doi.org/10.1007/s12517-021-07374-y
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DOI: https://doi.org/10.1007/s12517-021-07374-y