考虑时间效应和水压影响的井壁与围岩相互作用分析方法

作者：陈斌¹’²,莫品强²’³,丁昱琪²,王子元²,周国庆²

作者简介：

陈斌,高级工程师,硕士生导师,E⁃mail:439786251@ qq. com

作者单位：

1. 中冶武勘工程技术有限公司,湖北武汉 430080; 2. 中国矿业大学深地工程智能建造与健康运维全国重点实验室,江苏徐州 221116; 3. 中国矿业大学深圳研究院,广东深圳 518057

基金项目：

国家自然科学基金(52178374);广东省自然科学基金(2024A1515011552);江苏省科技计划(BK20242090)

摘要：

随着西部煤炭资源开采逐步向深部进军,复杂围岩环境中立井井筒的设计与施工正面临前所未有的挑战.结合岩土介质小孔扩张理论,基于黏弹塑性围岩特性分析了围岩在卸载过程中的力学行为,构建了考虑时间效应和水压影响的井壁与围岩协同承载分析方法. 通过研究围岩性质、地层埋深、外壁水压等多因素对井壁荷载的综合影响,揭示了立井井壁与围岩相互作用的复杂机制. 针对西部地区特有的地质条件和工程需求,提出了一种考虑井筒安全系数的井壁优化设计方法,为保障矿井安全提供坚实的理论和技术支撑.

关键词：深地工程;矿井;井壁;围岩;时间效应;协同承载

English：

With the exploitation of coal resources in the western region of China gradually advancing tothe deep, the design and construction of vertical shafts in complex surrounding rock environments arefacing unprecedented challenges. Combined with the theory of small hole expansion in geotechnicalmedium, the mechanical behavior of surrounding rock during unloading is analyzed based on thecharacteristics of viscoelastic⁃plastic surrounding rock, and a method for analyzing the synergistic bearingcapacity of shaft lining and surrounding rock considering time effect and water pressure effect isconstructed. The complex mechanism of interaction between shaft lining and surrounding rock wasrevealed by studying the comprehensive influence of surrounding rock properties, buried depth of strata,water pressure of the outer wall, and other factors on shaft lining load. Aiming at the unique geologicalconditions and engineering requirements in the western region of China, an optimization design method ofshaft wall considering the safety factor of the shaft is proposed, which provides solid theoretical andtechnical support for ensuring mine safety.

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