智能化无人开采系列关键技术之一——综采智能化工作面调斜控制技术研究

Study on key technologies of intelligent unmanned coal mining series Ⅰ:study on diagonal adjustment control technology of intelligent fully-mechanized coal mining face

为解决智能化无人开采关键难题之一的调斜控制问题,采用现场调研、力学分析和工业性试验相结合的方法,得到了工作面调斜控制的内在根本原因及外在诱发原因;阐明了综采工作面刮板输送机的力学行为,得出了刮板输送机发生上窜、下滑和不发生上窜或下滑的力学条件;指出了工作面调斜控制技术中的单向割煤、反向推移刮板输送机、加刀、减刀及加刀减刀联合控制技术原理;提出了综采智能化工作面基于实时推进度监测的调斜控制技术,实时监测运输巷推进度、回风巷推进度及伪斜角度,同时利用安装在机头和机尾的推进度测量装置进行自动对比分析,以达到对综采智能化工作面实时调斜的智能控制。现场工业性试验表明,基于实时推进度监测的工作面超宽带测距最大误差125.0 mm,最小误差0,平均误差25.9 mm,此误差范围内满足综采智能化工作面调斜控制技术的现场需要,可以进行精确的智能调斜控制。

In order to solve a diagonal adjustment control problem which one of the key difficulty problems of the intelligent unmanned mining,a site investigation,mechanics analysis and industrial test combined method was applied and an internal root cause and the external induced cause of the diagonal adjustment control in the coal mining face were obtained. The paper stated the mechanics behavior of the scraper conveyor in the fully-mechanized coal mining face. The paper obtained the upward running,downward sliding of the scraper conveyor,and the mechanics conditions of no upward running or downward sliding of the scraper conveyor. The paper pointed out the single directional coal mining,reversed pushed scraper conveyor,additional cutting depth,minus cutting depth and the plus cutting depth and minus cutting depth combined control technical principle. The diagonal adjustment control technology of the fully mechanized intelligent coal mining face was provided based on the monitoring and measuring of the real time pushing forward rate. The pushing forward rate of the transportation gateway,pushing forward rate of the air returning gateway and the false-inclined angle were real timely monitored and measured. Meanwhile,an automatic comparison analysis was conducted with the pushing forward rate measuring device installed at the head and tail of the machine in order to conduct the intelligent control of the real time diagonal adjustment in the fully mechanized intelligent coal mining face. The site industrial trial showed that based on the monitoring and measuring of the real time pushing forward rate,a max error of the distance measurement in the over wide zone of the coal mining face was 125.0 mm,the min error was 0 and the average error as25.9 mm. The error within the scope could meet the site requirements of the diagonal adjustment control technology for the fully-mechanized intelligent coal mining face and could conduct the accurate intelligent diagonal adjustment control.