程利兴,郭洁,高斌,周翔,李灵博,高健勋,李永元,李靖宇,李义朝,汪占领,周鹏赫

• 1:中煤科工开采研究院有限公司
• 2:天地科技股份有限公司开采设计事业部
• 3:扎赉诺尔煤业有限责任公司
• 4:华亭煤业集团有限责任公司

摘要(Abstract)：

为了研究锚索在轴向冲击荷载下的动力响应特征，选取砚北煤矿冲击地压巷道常用的锚索材料，采用AW-1500微机控制电液伺服试验机和自由落锤冲击试验机进行了锚索静、动载力学性能试验，共设计9种不同能量等级的冲击试验，获得了冲击力时程曲线、冲击力-变形曲线、锚索冲击变形以及吸收能量的特征曲线。结果表明：静载拉伸破断载荷为350.83～356.81 k N，平均延伸率3.49%，冲击载荷作用下锚索承受的冲击力明显大于静载破断载荷，而延伸率明显降低，平均最大降低35.24%，锚索脆性破坏特征突出；锚索变形-冲击力曲线变化过程分为初期震荡阶段、急剧增长阶段以及弹性回弹等3个阶段，冲击能量小于15 000 J时，锚索主要发生弹性变形，锚索冲击力时程曲线峰值点与冲击能量峰值点基本一致，随着冲击能量的逐渐增大，锚索冲击力峰值也逐渐增大，在急剧增长阶段震荡型增长趋势较显著；冲击能量大于等于15 000 J时，冲击能量未达到峰值前，锚索即发生破坏，随着冲击能量的增大，锚索塑性变形变化突出，冲击动能向锚索变形能转化，锚索吸收能量与塑性变形基本成正比。通过对锚索冲击载荷下的力学响应特征分析，可为冲击地压矿井的巷道支护设计和材料选取提供一定的理论依据。

关键词(KeyWords)： 冲击地压;锚索;冲击载荷;落锤试验;响应特征

Abstract:

Keywords:

基金项目(Foundation): 中国华能总部科技资助项目(HNKJ20-H48);; 国家自然科学基金面上资助项目(52174080,51974160);; 天地科技股份有限公司开采设计事业部重点基金资助项目(KJ-2022-KCZD-01)

作者(Author): 程利兴,郭洁,高斌,周翔,李灵博,高健勋,李永元,李靖宇,李义朝,汪占领,周鹏赫

DOI: 10.13532/j.jmsce.cn10-1638/td.20230506.001

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