在中厚煤层开采领域，超长工作面智能开采是煤炭开采技术的发展趋势，而智能运输是其重要组成部分。在总结现阶段国内400～450 m工作面智能开采中刮板运输系统问题的基础上，探索了500 m超长工作面智能刮板输送系统装机功率与运量合理匹配的方法，提出了解决500 m超长工作面刮板运输技术难题的可行性方案。基于综采三机选型配套技术方案及2 000 kW以上高端传动系统的应用实践，研制了国产2 500 kW大功率变频一体智能传动系统，包括变频一体电机、减速器、限矩器等，关键技术、关键部件均实现了国产化。为解决因传动装置重心位置后移、中部槽槽宽参数不变，不利于端头设备顺利推移的技术难题，研究了中等槽宽配置大功率传动装置的防偏沉技术，建立了机头（尾）推移部多工况推移模型，并对推移部进行了结构优化，解决了因传动装置偏沉造成机头整体失衡、漂溜严重、推移难度加剧的问题。针对刮板链断链后，中部槽内煤量负荷较大时，液压马达难以带动、断链事故处理较为困难的问题，选用了大扭矩数字液压马达并研制了数字马达控制系统，减小了维护刮板链的工作强度。基于刮板运输设备安全运行对链条进行实时变形补偿的需求，提出了500 m运距链条张紧控制策略，开发了运行过程中链条张紧度随负荷梯度智能调节技术，解决了500 m运距链条弹性变形的动态补偿问题，并通过在机尾架盖板上端加装AI高清摄像仪来实现对链条运行状态的实时检测，为工作人员对链条运行状态的实时掌控提供了便利。此外，为了提高伸缩机尾对多种复杂工况的适应性，确保其在使用周期内能够伸缩自如，提出了从结构、材料、制造工艺三方面来提高伸缩机尾的强度和刚度的技术方案，并研制了液压缸防护罩、伸缩机尾滑道自动冲洗系统，进一步提升了伸缩机尾的可靠性。井下现场工业性试验表明：该设备运量与装机功率匹配合理，2 500 kW变频一体智能传动系统占用空间较小、传递扭矩精准，斜推式机头（尾）推移部稳定可靠，数字液压马达处理断链问题方便省力，伸缩机尾按负荷分梯度自动张紧时未出现卡滞，保障了煤炭的安全、高效运输，为500 m超长工作面智能开采提供了技术保障。

In the field of medium and thick coal seam mining, intelligent mining of ultra-long face is the development trend of coal mining technology, and intelligent transportation is an important part of it.Based on the summary of the problems of the scraper transportation system in the intelligent mining of 400−450 m working face in China at present, the method of reasonable matching between the installed power and the volume of the intelligent scraper transportation system of 500 m ultra-long working face is explored, and the feasible scheme to solve the technical problems of scraper transportation of 500 m ultra-long working face is proposed.Based on the technical scheme of selection of three fully mechanized mining machines and the application practice of high-end transmission system above 2 000 kW, the domestic 2 500 kW high-power variable frequency integrated intelligent transmission system is developed, including variable frequency integrated motor, reducer, moment limiter, etc. The key technologies and key components are realized in China.In order to solve the technical problem that the center of gravity of the transmission device is shifted back and the middle groove width parameter is unchanged, which is not conducive to the smooth moving of the end equipment, the anti-deflection technology of the high-power transmission device configured with medium groove width is studied, the multi-working condition moving model of the head (tail) moving part is established, and the structure of the moving part is optimized. The problems of overall head imbalance, serious drift and aggravating difficulty of moving are solved due to the deflection of transmission device.In view of the problems that the hydraulic motor is difficult to drive when the coal load in the middle trough is large after the scraper chain is broken, the digital hydraulic motor with large torque is selected and the digital motor control system is developed to reduce the working intensity of the scraper chain maintenance.Based on the demand for real-time deformation compensation of chain during the safe operation of scraper transportation equipment, the tensioning control strategy of 500 m haul chain is proposed, and the intelligent adjustment technology of chain tension with load gradient during operation is developed to solve the dynamic compensation problem of elastic deformation of 500 m haul chain. Moreover, AI high-definition camera is installed on the upper end of the tail frame cover plate to realize real-time detection of the running state of the chain, which provides convenience for the staff to real-time control of the running state of the chain.In addition, in order to improve the adaptability of the telescopic tail to a variety of complex working conditions and ensure that it can expand freely during the service cycle, a technical scheme is proposed to improve the strength and stiffness of the telescopic tail from three aspects of structure, material and manufacturing process, and the hydraulic cylinder protective cover and automatic flushing system of the telescopic tail slide are developed to further improve the reliability of the telescopic tail.Underground field industrial tests show that: The equipment capacity and installed power matching reasonable, 2500 kW frequency conversion integrated intelligent transmission system occupies less space, accurate torque transmission, inclined push head (tail) push part is stable and reliable, digital hydraulic motor to deal with the problem of broken chain convenient and labor saving, the retractable tail according to the load gradient automatic tensioning without stuck, to ensure the safety and efficient transportation of coal. It provides technical support for intelligent mining of 500 m ultra-long working face.