235 mechanical behavior between supports and the surrounding rock and equipment. The study reveals the dynamic multi-dimensional load transfer mechanisms from the surrounding rock and equipment to supports during processes such as initial setting, shifting, and conveyor advancing under inclination effects, as well as the spatiotemporal characteristics of the mechanical responses of supports and other equipment. This provides important theoretical support for the dynamic stability control of hydraulic supports in steeply dipping longwall faces. 2. CONSTRUCTION OF HYDRAULIC SUPPORTS ATTITUDE PERCEPTION AND SIMULATION SYSTEM The hydraulic support attitude perception and simulation system is a high-fidelity virtual model of the coal mining face constructed using digital technologies. Its core capability lies in enabling comprehensive and real-time monitoring of the entire coal mining face and its hydraulic supports, while providing a highly realistic operational environment for precise real-time control of the working face. During the mining process in steeply dipping coal seams, the interaction between hydraulic supports and the surrounding rock becomes particularly complex due to the inclination effect of gravity. This involves changes in mechanical properties, stress responses of the support structure, deformation control, and other aspects. Therefore, accurately grasping the attitude changes of hydraulic supports is of significant importance for optimizing their structural parameters and enhancing their level of intelligence. 2.1 System Design Framework Based on the large-scale physical simulation and experimental platform of the “support–surrounding rock” system at Xi'an University of Science and Technology (Fig. 1), the physical state of the working face with inclination angles ranging from 0° to 67° can be simulated. This provides a spatial operating environment for hydraulic supports and enables dynamic monitoring of their posture and load conditions. Figure 1 - Large-scale physical modeling and simulation platform for the “supportsurrounding rock” system
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