Spatial straightness solving method of hydraulic support group based on internal and external attitude characteristics

In response to the inaccuracy of the straightness assessment of the hydraulic support group in the underground mining process. This paper proposes a spatial straightness model for the hydraulic support group. Firstly, the sensing information of the support group is obtained, and based on this, a high-fidelity digital twin model is constructed in the virtual space. The information is then fused to solve the position of the support group, and a three-point fixed-circle model is established. A six-point nine-element solution model is constructed to solve the overall information of the support group. Subsequently, based on the overall information of a single stent, the solution fits the empty frame baseline of the support group, and at the same time solves the reference axis of the support group. Spatial straightness is defined as the distance from the measurement points on the spatial baseline to the reference axis. Then, the spatial straightness data information is processed with the help of data interaction between Physical Space-Unity3d-MATLAB. Finally, a specific coal seam was constructed under laboratory conditions, and the supports were placed in coal seams with average inclination angles of 8°, 0°, and −8°, respectively, to investigate the effect of the relationship between support groups on straightness and the difference between planar straightness and spatial straightness. The experimental findings indicate that, under equivalent coal seam conditions and support configurations, the maximum spatial straightness deviation that exceeds plane straightness deviation is 12.078 mm, with a minimum value of 2.382 mm. A comparison of the traditional planar straightness calculation method, which is projected along the advancement direction, with the spatial straightness proposed in this paper reveals their respective strengths and limitations. The spatial straightness incorporates the internal lifting column characteristics of the support group and the external misalignment and torsion characteristics. Additionally, it is capable of accounting for the influence of the complex coal seam conditions on the support group, thereby facilitating a more precise depiction of the hydraulic support group’s state in the working face.

• Publication year

  2025

• Venue

  Measurement science and technology

• Publication date

  2025-08-14

• Fields of study

  Physics, Engineering, Environmental Science

• Identifiers
  DOI 10.1088/1361-6501/adfb93
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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