矿区井架倾斜变形的三维激光扫描监测方法及应用

    Three-dimensional laser scanning monitoring method and application for the tilt deformation of coal mine headframe

    • 摘要: 井架作为煤矿提升系统的重要组成部分,其稳定运行对煤矿的安全和高效运行具有极其重要的意义。然而,在煤矿井架的长期运行过程中,由于提升超载、急停冲击、地基变形等多种危害因素的影响,井架地基可能出现不均匀沉降,导致井架发生倾斜,从而给煤矿的安全生产带来隐患。因此,如何安全、准确地监测井架倾斜成为煤矿安全生产的关键之一。目前,现有的井架监测方法通常需要监测人员攀爬井架进行设备安装,存在较高的危险系数。此外,由于监测点数量有限,无法全面了解井架的整体变形情况。为此,本文提出了一种基于三维激光扫描单站数据与标准平面相对空间关系变化的井架倾斜变形监测方法。该方法首先基于井架的空间几何特征,将井架分割成不同的平面;其次,对不同时期、不同坐标系下的井架同名平面进行匹配;最后,根据在不同时期每一个平面与标准平面之间的角度变化情况,判断井架是否发生倾斜,并对倾斜变形监测的精度进行评估。研究结果表明,采用三维激光扫描单站数据进行井架倾斜变形监测,其精度可达到0.2 mm/m。这种方法不仅劳动强度低、监测速度快且安全性高,还能够获取井架的整体变形信息,监测精度完全满足井架倾斜监测规范的要求,为井架变形监测提供了一种新的有效途径。

       

      Abstract: The coal mine headframe, a crucial component of the coal mine lifting system, is pivotal in ensuring the safe and efficient operation of the coal mine. However, during prolonged operation, various detrimental factors, such as overloading, abrupt stops and foundation deformation, can induce uneven settlement of the headframe foundation, thereby causing the headframe to tilt. This tilting poses a latent hazard to the safe production within the coal mine. Consequently, the safe and precise monitoring of the headframe’s tilt is essential for its safe operation. Currently, existing methods for monitoring the headframe typically require personnel to ascend the structure for equipment installation, which inherently poses a high risk. Furthermore, due to the limited number of monitoring points, it is not possible to gain a comprehensive understanding of the overall deformation of the headframe. To address this, this paper proposes a method for monitoring the tilt deformation of the headframe based on changes in the relative spatial relationship between three-dimensional laser scanning data from a single station and a standard plane. This method initially segments the headframe into various planes based on its spatial geometric features. It then matches the corresponding planes of the headframe across different periods and coordinate systems. Finally, it assesses whether the headframe has tilted by observing the angular changes between each plane and the standard plane at various times, and evaluates the accuracy of the tilt deformation monitoring. The research findings indicate that utilizing three-dimensional laser scanning data from a single station for monitoring headframe tilt deformation can achieve an accuracy of 0.2 mm/m. This method not only reduces labor intensity, accelerates monitoring speed, and enhances safety, but also provides comprehensive information on the deformation of the headframe. The monitoring accuracy fully meets the requirements of the derrick tilt monitoring specifications, offering a new and effective approach to monitoring headframe deformation.

       

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