摘要
针对动载扰动作用下巷道支护体失稳问题,研发应力波扰动下巷道支护体失稳试验系统,实现不同应力波角度、强度下的巷道支护相似模拟试验,并应用IMASS本构数值模拟验证。结果表明:支护体稳定性与动载扰动强度呈负相关、与扰动距离呈正相关;随着冲击加速度增大,应力波传播中遇围岩裂隙发生连续反射,导致围岩应力增大,且围岩应力与冲击加速度呈二次多项式函数关系;当垂直冲击加速度为47~197 m/s^(2)时,右帮最大破坏范围达9 cm,顶板裂隙处于孕育扩展阶段,锚索网联合支护具备一定抗扰动能力,围岩保持稳定;当垂直冲击加速度为247~297 m/s^(2)时,右帮最大破坏范围达21 cm,顶板最大破坏范围达15 cm,锚固承载结构所受外部荷载超过支护体强度,围岩发生失稳破坏。该研究成果可为动载扰动作用下巷道支护设计提供技术指导。
Aiming at the instability of roadway support under dynamic load disturbance,an experimental system for the instability of roadway support under the action of stress wave was developed.With this experimental system,similar simulation experiments of roadway support under different stress wave angles and intensities were performed,and the IMASS constitutive numerical model was employed for validation.Key findings show that the stability of support is negatively correlated with the intensity of dynamic load disturbance and positively correlated with the distance of such disturbance.With the increase of impact acceleration,the stress wave is continuously reflected upon encountering surrounding rock fractures.As a result,the surrounding rock stress rises according to a quadratic polynomial function of the impact acceleration.When the vertical impact acceleration is 47-197 m/s^(2),the maximum damage range of the right rib reaches 9 cm,and the roof fractures remain in the stage of breeding and expanding.The“bolt-cable-mesh”joint support has a certain anti-disturbance ability,and the surrounding rock is stable.When the vertical impact acceleration is 247-297 m/s^(2),the maximum damage ranges of the right rib and the roof reach 21 cm and 15 cm,respectively.Under these conditions,the external load on the anchor bearing structure overwhelms the support strength,so that the surrounding rock undergoes instability and failure.The research results can provide technical guidance for the design of roadway support under dynamic load disturbance.
作者
贾策
范超军
李胜
罗明坤
杨振华
王长友
王学增
JIA Ce;FAN Chaojun;LI Sheng;LUO Mingkun;YANG Zhenhua;WANG Changyou;WANG Xuezeng(College of Mining,Liaoning Technical University,Fuxin,Liaoning 123000,China;Key Laboratory of Coalburst Theory and Prevention Technology,National Mine Safety Administration,Liaoning University,Shenyang,Liaoning 110036,China;Liaoning Geology Engineering Vocational College,Dandong,Liaoning 118000,China;Ventilation Department of Energy Business Division,Lu'an Chemical Group,Changzhi,Shanxi 046002,China;China Coal Xi'an Design Engineering Co Ltd,Xi'an,Shaanxi 710000,China)
出处
《采矿与安全工程学报》
北大核心
2026年第2期330-340,共11页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(52074146)
煤矿冲击地压机理与防控技术国家矿山安全监察局重点实验室开放基金项目(KFJJ-2025-0015)
辽宁省“兴辽英才计划”项目(XLYC2202022)
中央引导地方科技发展基金项目(YDZJSX2025C036)。
关键词
应力波
锚索网
巷道围岩
动载试验装置
stress wave
bolt-cable-mesh support
surrounding rock
dynamic load experimental device
