矿区预应力锚索支护参数优化与工程效果评价

Optimization of Support Parameters and Evaluation of Engineering Performance for Prestressed Anchor Cable Systems in Mining Areas

摘要

针对某矿区埋深约500 m采掘巷道顶板中粒砂岩层理发育、局部节理贯通及原预应力锚索支护协同控顶不足等问题，开展锚索支护参数优化研究。以顶板下沉量、锚索最大受力和支护成本为评价指标，构建基于响应面法的锚索长度、直径和间距优化模型，并采用FLAC3D数值模拟及现场应用进行验证。结果表明，采用长度8 m、直径22 mm、间距1.4 m×1.4 m的优化方案后，顶板下沉量由120 mm降至65 mm，锚索最大受力由180 kN降至120 kN，支护成本由120元/m²降至102元/m²。优化方案改善了顶板深浅部岩层协同承载效果，提高了支护体系适配性与经济性。

Abstract

To address issues such as well-developed bedding structures in the medium-grained sandstone layer of the roof in mining roadways at a depth of approximately 500 m, localized joint penetration, and insufficient coordinated roof control with original prestressed cable supports, this study conducted an optimization analysis of cable support parameters. Using roof settlement displacement, maximum cable stress, and support cost as evaluation metrics, a response surface methodology-based optimization model was developed for cable length, diameter, and spacing, which was validated through FLAC3D numerical simulations and field applications. Results demonstrate that adopting the optimized configuration (length 8 m, diameter 22 mm, spacing 1.4 m × 1.4 m) reduced roof settlement from 120 mm to 65 mm, decreased maximum cable stress from 180 kN to 120 kN, and lowered support costs from 120 yuan/m² to 102 yuan/m². This optimization enhances the synergistic load-bearing performance of rock layers across both shallow and deep roof sections, improving both the adaptability and economic efficiency of the support system.

关键词

预应力锚索 / 参数优化 / 响应面法 / 顶板控制 / 数值模拟

Key words

prestressed anchor cable / parameter optimization / response surface methodology / roof control / numerical simulation

参考文献

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