软岩巷道锚固体蠕变特性研究  

Study on creep characters of anchorage body in soft rock tunnel

作　　者：韦四江[1] 马建宏[2] 孙光中[3] 

机构地区：[1]河南理工大学能源科学与工程学院河南,焦作454003 [2]河南理工大学科学技术处,河南焦作454003 [3]河南工程学院安全工程系河南,郑州451191

出　　处：《河南理工大学学报（自然科学版）》2008年第5期524-528,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家安全生产科技计划项目(07-148);河南理工大学青年基金项目(Q2006-9)

摘　　要：锚固体蠕变特性是锚杆在软岩巷道中有效应用的关键,本文采用相似材料模拟试验对软岩锚固体的蠕变特性进行了研究,用石蜡、砂和凡士林模拟软岩,保险丝模拟锚杆,石膏模拟锚固剂,采用分级加载方式.根据试验结果得到软岩锚固体在不同应力水平下的蠕变规律及其经验公式.软岩锚固体的蠕变特性采用Burgers模型进行描述,推演出不同应力水平下的锚固体蠕变本构方程.根据蠕变经验公式,对锚杆支护软岩巷道的粘弹塑性分析表明,在1.1倍的应力水平时,巷道合理的支护时间为1 000 m in<t<1 500 m in.Creep is a key factor to the application of bolts in weak rock. The creep studied in soft rock under different stress level, by means of analogue experiment. the mixture of wax, sand and vansline, bolt by fuse and resign by gypsum. Step 1 rule of anchorage body was Soft rock was analogue by on experimental results, creep regular patterns and expirical formula were obtained in different stress level The creep character was described in Burgers model, then creep mechanical function deduced. According to creep expirical foumula, the raitional support time is 1 000 to 1 500 minutes when stress level is 1.1 times by using viscid and elastic analyses.

关 键 词：软岩 锚固体 蠕变 相似材料试验 

分 类 号：TD315.3[矿业工程—矿井建设]