杨健锋,刘泽宇,柴敬,高登彦,张丁丁,郝鸿儒,王佳琪,杨磊

• 1:西安科技大学能源学院
• 2:西安科技大学教育部西部矿井开采及灾害防治重点实验室
• 3:国家能源集团神东煤炭集团

摘要(Abstract)：

为了深入探究遗留煤柱下区段煤柱内部变形规律及其对巷道稳定性的影响,以大柳塔煤矿活鸡兔井22206、22208工作面为工程背景,采用理论分析、现场实测以及数值模拟相结合的方法,将分布式光纤传感器植入煤柱内部,通过光纤应变表征对下伏区段煤柱内部变形进行系统分析。研究结果表明:通过分布式光纤所监测的应变变化,可反应煤柱内部受力情况及弹塑性区域范围,得出位于遗留煤柱下区段煤柱弹性区范围为采空区下的62%,煤柱更容易发生失稳破坏;并通过分布式光纤应变增速反应煤柱内部破坏剧烈情况;研究工作面开采经过遗留煤柱区域时的3个阶段(进、过、出遗留煤柱),指出在出遗留煤柱阶段所受应力集中程度大于进、过遗留煤柱阶段。研究成果可为分布式光纤传感技术用于煤柱内部变形监测及规律研究提供参考。

关键词(KeyWords)： 遗留煤柱;分布式光纤;区段煤柱;内部变形

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上资助项目(52474147);; 国家自然科学基金青年科学资助项目(52004203)

作者(Author): 杨健锋,刘泽宇,柴敬,高登彦,张丁丁,郝鸿儒,王佳琪,杨磊

DOI: 10.13532/j.jmsce.cn10-1638/td.2024-1247

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