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Author: Admin | 2025-04-28
Sandstone10:13082.6528.2584.5457Limestone (key stratum)10:15077.9287.7867.143 Table 2. Stress concentration factor along the strike direction. Table 2. Stress concentration factor along the strike direction. NumberFace Advanced Distance (L/m)Influence Range of the Advance Abutment Pressure (m)Distance Between the Peak Stress and the Working Face (Lk/m)Peak Stress Concentration Factor (Kmax)1344782.12564962.163757192.34947192.2651166862.4361356562.3571596382.45817165112.63 Table 3. Stress concentration factor of two longitudinal sensors. Table 3. Stress concentration factor of two longitudinal sensors. Sensor StationSensor Serial NumberDistance to Air Inlet (m)Stress Concentration Factor KAdvancing86 mAdvancing 90 mAdvancing 94 mAdvancing 99 mAdvancing105 mInlet side of the coal wall1−301.011.011.0191.0190.992−211.321.581.661.762.093−121.661.962.3652.4412.854−31.671.7822.222.232.24Working face end531.691.832.32.180.1Working face middle9801.641.792.2520.1Working face end131571.71.822.312.20.11Return air side of the coal wall141751.641.7622.3122.252.34151841.661.9322.3572.4552.88161931.311.511.631.792.1172021.031.081.081.081.08 Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content. © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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