233 EXPERIMENTAL STUDY ON SUPPORT ATTITUDE EVOLUTION AND LOAD TRANSFER MECHANISM IN STEEPLY DIPPING MINING FACES BASED ON DIGITAL TWIN *Panshi Xie1,2, Yingyi Zhang1,2, Yongping Wu1,2, Hongwei Wang1,2, Bosheng Hu1,2, Ding Lang1,2, Shenghu Luo1,2, Xiangyu Luo4, Baofa Huang1,2 1 Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education, Xi’an University of Science and Technology, Xi’an 710054, China 2 School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China 3 College of Sciences, Xi’an University of Science and Technology, Xi’an 710054, China 4 College of Artificial Intelligence & Computer Science, Xi'an University of Science and Technology, Xi’an 710054, China ABSTRACT To address the stability control challenges of hydraulic supports in steeply dipping coal seam mining, this study developed a hydraulic support simulation system integrating attitude perception, 3D modeling, and real-time mapping based on digital twin technology. Relying on a large-scale physical modeling platform, a physical similarity simulation experiment of supports was conducted under a 45° dip angle. A multi-sensor array was used to monitor the mechanical responses of the supports under static load, frontal impact, sidepush impact, and rear-push impact loads in real-time. The results show that the system, utilizing MPU6050 and VL53L0X sensors, enables real-time monitoring of support attitude and early warning of tipping. The average load on the canopy under impact loads (3.75 kN) was higher than under static load (3.63 kN). The load exhibited a periodic increasing pattern under side-push impact, while under rear-push impact, the load on the shield beam showed a distribution characteristic of "highest in the upper section, medium in the middle, and lowest in the lower section" along the incline. This research reveals the dynamic interaction mechanism and load transfer laws between supports and surrounding rock in steeply dipping faces, providing theoretical and experimental foundations for intelligent support control and stable working face operation. KEYWORDS Steeply dipping coal seam, Digital twin technology, Three-dimensional simulation experiment, Attitude change of support, Load transfer
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