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基于AHP−熵权组合赋权的开拓巷道过陷落柱围岩支护参数优化

Optimization of support parameters of development roadway passing through collapse column based on AHP−entropy weight combination

  • 摘要: 陷落柱破碎区易诱发安全事故,合理设计陷落柱区域巷道围岩支护参数对巷道安全、高效掘进尤为重要。采用理论分析、数值模拟及工程试验等研究方法,对开拓巷道过陷落柱围岩支护参数优化进行了研究。综合考虑技术和经济指标,构建了开拓巷道过陷落柱围岩支护效果评价体系。提出层次分析法(AHP)−熵权法组合赋权的综合评价方法,确定最优支护参数。基于Node-Red进行界面开发,以FLAC3D作为平台底层服务,研发了漳村煤矿巷道支护参数的智能设计系统。结果表明:确定了支护技术评价指标为顶板下沉率、两帮变形率、底板底鼓率和锚杆变形率。支护经济指标为支护成本和掘进速度。系统研发了登录功能、巷道稳定状况分析功能、支护参数初始设计、支护方案结果展示和巷道支护效果评价五大功能,实现了漳村煤矿巷道支护智能设计及评价。最优支护方案Ⅱ参数为锚杆间排距为900 mm,顶板锚索布置3根,工钢棚间距为900 mm。经现场应用,在矿压监测0~60 d内,顶板表面位移最大值为218 mm,两帮表面位移最大值为105 mm。顶板离层深部最大值为5 mm,浅部基点为5 mm。顶板锚杆受力范围在196~206 kN。30 d左右围岩变形趋于稳定,围岩得到了有效控制。验证了漳村煤矿巷道支护智能设计系统的有效性,研究成果为过陷落柱巷道支护参数优化提供新方法。

     

    Abstract: Collapse column crushing area is easy to induce safety accidents, reasonable design of roadway support parameters in the collapse column area is especially important for safe and efficient tunneling. A combination of theoretical analysis, numerical simulation, and engineering testing was employed to investigate the optimization of support parameters for surrounding rock in development roadways passing collapse columns. In this paper, the technical and economic indexes of support are considered comprehensively. The evaluation system of the support effect of the development roadway passing through the columm column is constructed. The comprehensive evaluation method of AHP-entropy weight combination assignment is proposed to determine the optimal support parameters. Interface development based on Node-Red language. Intelligent design system for roadway support parameters in Zhangcun Coal Mine was developed using FLAC3D software as the platform bottom service. The results indicate that the identified support technology evaluation indicators include roof subsidence rate, sidewall deformation rate, floor heave rate, and bolt deformation rate. The support economic indicators are support cost and tunneling speed. The system incorporates five key functions: login, roadway stability analysis, initial design of support parameters, support scheme result display, and roadway support effectiveness evaluation. These features enable intelligent design and assessment of roadway support in Zhangcun Coal Mine. The optimal support scheme II are 900 mm row spacing between blot, 3 cables arranged in the roof, and 900 mm spacing between the sheds of industrial steel sheds. After the field application, in the mine pressure monitoring 0−60 d, the maximum value of the surface displacement of the roof is 218 mm, and the maximum surface displacement of the two sides reaches 105 mm. The maximum value of the roof slab away from the layer is 5 mm at depth and 5 mm at the shallow base. The roof cables are all stressed, with forces ranging from 196 kN to 206 kN. It stabilized around 30 d and the surrounding rock was effectively controlled. The intelligent roadway support design system was successfully validated in the Zhangcun Coal Mine, offering a novel methodology for optimizing support parameters in roadway sections passing collapsed column.

     

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