摘要
在智能化综采工作面,液压支架的智能化技术对顶板及煤壁的安全控制、三机的协调运行及工作面的循环推进起着关键保障作用。针对煤矿智能化开采的技术现状及发展趋势,分析了液压支架与围岩的耦合状态、液压支架动作过程、支架与刮板输送机的协同控制、护帮板与煤壁耦合状态等感知功能需求,提出了相应的感知方法及传感元件的布置方案。在分析感知需求的基础上,提出了液压支架感知元件的结构框架及数字化感知网络架构。感知元件具有自供电数字化信号无线传输功能、架内无线传感网络采用ZigBee通信方式,所有无线感知信号通过信息接收装置进行存储、处理,然后通过RS485总线与支架控制器通讯,架间信息传输采用工业以太网。实现全面感知液压支架的位置、姿态、工作阻力、载荷分布、液压控制回路关键参数等信息。依据这些信息,结合矿压理论及支架与围岩耦合机理,可以实时掌握顶板状态、来压规律以及来压过程支架与围岩的耦合特性;利用数字化感控网络,液压支架各个动作的控制回路可以实现开关式闭环控制,可以为液压支架对围岩的自适应调节、推溜拉架的平直度控制、跟机移架自适应控制以及综采装备物联网的构建等智能化水平的进一步提升提供必要的信息支撑。
In the intelligent fully mechanized mining face,the intelligent technology of the powered support plays a key role in ensuring the safety control of the roof and coal wall,the coordinated operation of the three fully mechanized mining machines and the circulating advancement of the mining face.Based on the technical status and the development trends of the intelligent mining,the coupling state between powered supports and the surrounding rocks,the powered support operation precession,the cooperative control relationships between the scraper conveyor and powered supports,the coupling relationships between the longwall face and sprag,and the requirements of intelligent technologies for the supports are analyzed.The corresponding sensing method and sensors layout of powered support are proposed.The main composition of the sensors and intelligent network is proposed based on the analysis of the sensing requirements.The intelligent sensors can self-powered and transmit wirelessly.Zigbee is adopted as the communication protocol and all the wireless signals are stored and proposed in the information receiver which is connected to the controller with RS485.Then,the proposed information transmits through the Industrial Ethernet between the supports.According to the above sensing information,combined with the mine pressure theory and the coupling mechanism,the state of roof,the law of mine pressure and the coupling characteristics of the powered support and surrounding rock in the incoming pressure process can be obtained in real time.With a digital control network,the switch type closed-loop control will be performed in the powered support movement.Thus,the information about the position,attitude,working resistance,load distribution and the hydraulic circuit can be sensed intelligently,providing necessary information supports for the improvement of intelligent level such as the automatic adjustment of the coupling state between the powered supports and the surrounding rocks,straightness control during the push-pull process,the adaptive control of following the shearer,and the construction of the internet of things for fully mechanized mining equipment.
作者
廉自生
袁祥
高飞
廖瑶瑶
郭永昌
赵瑞豪
LIAN Zisheng;YUAN Xiang;GAO Fei;LIAO Yaoyao;GUO Yongchang;ZHAO Ruihao(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Fully Mechanized Coal Mining Equipment,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2020年第6期2078-2089,共12页
Journal of China Coal Society
基金
国家自然科学基金联合基金重点资助项目(U1610251)
国家自然科学基金资助项目(51905368)。
关键词
液压支架
承载状态感知
动作过程感知
数字化感知元件
无线感知网络
powered support
load status recognition
motion process sensing
digital sensing element
wireless sensing network
