Understanding the spatiotemporal evolution of overburden deformation during coal mining is still a challenge in engineering practice due to the limitation of monitoring techniques.Taking the Yangliu Coal Mine as an example,a similarity model test was designed and conducted to investigate the deformation and failure mechanism of overlying rocks in this study.Distributed fiber optic sensing(DFOS),high-density electrical resistivity tomography(HD-ERT)and close-range photogrammetry(CRP)technolo-gies were used in the test for comprehensive analyses.The combined use of the three methods facilitates the investigation of the spatiotemporal evolution characteristics of overburden deformation,showing that the mining-induced deformation of overburden strata was a dynamic evolution process.This process was accompanied by the formation,propagation,closure and redevelopment of separation cracks.Moreover,the key rock stratum with high strength and high-quality lithology played a crucial role in the whole process of overburden deformation.There were generally three failure modes of overburden rock layers,including bending and tension,overall shearing,and shearing and sliding.Shear failure often leads to overburden falling off in blocks,which poses a serious threat to mining safety.Therefore,real-time and accurate monitoring of overburden deformation is of great significance for the safe mining of underground coal seams.

Gang Cheng;Wentao Xu;Bin Shi;Jinghong Wu;Binyang Sun;Honghu Zhu

School of Computer Science,North China Institute of Science and Technology,Beijing,101601,China;School of Earth Sciences and Engineering,Nanjing University,Nanjing,210023,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,610059,China;School of Civil Engineering,Suzhou University of Science and Technology,Suzhou,215009,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan,232001,China

岩石力学与岩土工程学报（英文版）

[1]Gang Cheng;Wentao Xu;Bin Shi;Jinghong Wu;Binyang Sun;Honghu Zhu-.Experimental study on the deformation and failure mechanism of overburden rock during coal mining using a comprehensive intelligent sensing method)[J].岩石力学与岩土工程学报（英文版）,2022(05):1626-1641

Yangliu

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