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    煤矿井下掘进工作面设备定位关键技术研究及应用

    Research and application of key technology for equipment positioning in underground excavation face of coal mine

    • 摘要: 掘进工作面导航定位精度直接关系到巷道成形质量与掘进安全,是实现煤矿智能快速掘进和掘进机器人化的关键基础。针对煤矿巷道“长时、短距、低速、强扰动、强粉尘、弱光照”等工况特征,系统梳理了典型掘进装备的导航定位需求与技术难点,综述了惯性导航、里程计辅助惯导、视觉、激光、超宽带、全站仪等传感定位方法,以及多传感融合定位技术的发展现状,提出了基于大地坐标的掘进工作面多模态定位技术,融合矿用本安型陀螺全站仪、惯导以及掘进机油缸内置的位移传感器,形成基于大地坐标的掘进工作面融合定位系统,实时测量掘进工作面悬臂式掘进机的位置和姿态信息,尤其是悬臂式掘进机截割头的大地坐标,并分析定位误差传播规律。试验结果表明:在直线与曲线掘进机行走轨迹下,基于大地坐标的掘进工作面导航定位系统的机身棱镜三维点位中误差4.86 cm,满足自动截割定位精度要求。

       

      Abstract: The navigation and positioning accuracy of the excavation face is directly related to the roadway forming quality and tunneling safety, serving as a key foundation for realizing intelligent rapid tunneling and robotized tunneling in coal mines. In view of the working conditions of coal mine roadways characterized by long duration, short distance, low speed, strong disturbance, high dust concentration and weak illumination, this paper systematically sorts out the navigation and positioning requirements and technical difficulties of typical excavation equipment, and reviews the development status of sensor positioning methods such as inertial navigation, odometer-assisted inertial navigation, vision, laser, ultra-wideband and total station, as well as multi-sensor integrated positioning technology. A geodetic coordinate-based integrated positioning technology for the excavation face is proposed, which integrates a mine intrinsically safe gyro total station, inertial navigation system and displacement sensors built in the hydraulic cylinders of the roadheader, forming a geodetic coordinate-based integrated positioning system for the excavation face. This system can measure the position and attitude information of the cantilever roadheader at the excavation face in real time, especially the three-dimensional geodetic coordinates of the cutting head,and analyze the propagation law of positioning errors. The test results show that the root mean square error of the three-dimensional point position of the fuselage prism of the navigation and positioning system based on geodetic coordinates is 4.86 cm under the walking trajectory of the linear and curved roadheader, which meets the requirements of automatic cutting positioning accuracy.

       

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