1516 RESEARCH AND APPLICATION OF KEY TECHNOLOGIES FOR AN ULTRA-HIGH-POWER INTELLIGENT AND HIGH-EFFICIENCY MAIN INCLINED SHAFT BELT CONVEYOR *Jianli Dai, Xingyuan Song, Ke Qian, Anlei Zhou Shanghai Co., Ltd., China Coal Technology and Engineering Group, Shanghai 200030, China, ABSTRACT For the main inclined shaft of Kekegai coal mine in Yanchang Petroleum, Shaanxi Province, a set of intelligent and efficient belt conveyor for the main inclined shaft with super power is developed under the severe conditions, including transportation distance exceeding 5000m, lifting height over 500m, and annual capacity of 25Mt. Key technologies such as dynamic modeling and analysis of the entire machine, distributed drive configuration and collaborative control, optimal design of critical components, and predictive maintenance of digital twins are applied, and industrial tests verification are completed. The results show that the driving power balance of the whole machine is 97%. The resistance of idler is reduced by 28%, and the energy consumption of the whole machine is reduced by 5%. The intelligent stepwise loose belt device improves the operation efficiency by more than 80%, the dust suppression efficiency at the transfer point exceeds 90%, and the drum is optimized with equal strength to reduce weight by 13%. The accuracy rate of fault prediction and identification of intelligent operation and maintenance system is 90%, and the normal intelligent operation rate is 95%. The equipment sets a Chinese record in core indicators such as lifting height, belt strength and total driving power, and its comprehensive performance is international leading, providing core equipment support for the construction of ten million ton intelligent mines in China. KEYWORDS Belt conveyor, main inclined shaft, ultra-high power, high capacity, intelligent operation and maintenance 1.INTRODUCTION As a continuous conveying equipment in mining and other industries, belt conveyor has the advantages of long transportation distance, large volume and high efficiency. The main inclined shaft belt conveyor (Dong J.F., 2025; Li T.J., 2025; Wu Y.L., 2025) is the core continuous transportation equipment of the modern ten million ton mine. With its advantages of large transportation volume, high efficiency, safety and reliability and low comprehensive cost, it is gradually replacing the traditional vertical shaft lifting system (Li Y.J., 2024; Tian F., 2025; Wang J.F., 2025). However, with the development of large scale and intelligent mine, the equipment is facing the requirements of extreme working conditions such as long distance, large lifting height, high production capacity and large driving power. Its development process faces technical problems such as complex dynamic characteristics of the whole machine (Wang J.Q., 2024; Yang Z.G., 2025), insufficient reliability of key components (Zhao L., 2023), low level of intelligent operation and maintenance (Xi C.G., 2023), and there is no mature application case at home and abroad for reference. The intelligent demonstration mine with an annual output of 25Mt is under construction in Kekegai coal mine of Yanchang Petroleum, Shaanxi Province. Its transportation distance is longer than 5000m and the lifting height is greater than 500m, which puts forward extreme requirements for transportation equipment. Based on this, this paper conducts research on the key technologies of the intelligent and efficient belt conveyor for super power main inclined shaft, focusing on breaking through the problems of the whole machine dynamics modeling, key components optimization, digital twin intelligent operation and maintenance system construction, and conducting industrial test verification, aiming to break through technical bottleneck and fill the gap in China.
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