冲击地压巷道围岩支护作用动力学分析

doi:10.11779/CJGE201508025

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摘要建立了冲击地压巷道围岩支护作用动力学模型,模型将上覆岩层简化为由多个质量块组成的块系,岩块简化为刚体,岩块间的连接简化为Kelvin-Voigt模型,把支护系统简化为弹簧和耗能阻尼器,初始岩块受冲击载荷作用。支护系统中阻尼为零时,为常规支护系统;支护系统中阻尼大于零时,为吸能防冲支护系统。分析得出：加强支护,提高支护强度,可以大幅度减少巷道冲击载荷作用下围岩加速度和位移幅值;支护系统中加入阻尼构件有利于快速平息围岩震动,增强支护抗冲击载荷能力,提高巷道围岩稳定性。提出了高强度吸能支护防治巷道冲击地压,为冲击地压巷道安全防冲支护设计提供理论依据。

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	唐治
	潘一山
	王凯兴

关键词 ：冲击地压, 动力学模型, 围岩支护, 吸能防冲

Abstract：A dynamic model for the support for surrounding rock of rockburst roadway is established. The overlying rock layer is simplified as the block composed of multiple mass blocks, the rock mass simplified as the rigid body, the connection between rocks simplified as the Kelvin-Voigt model, the supporting system simplified as the spring and energy dissipation damper, and the initial rock is subjected to impacting load. The supporting system is a conventional supporting system when the damping is 0. And it is an energy absorption supporting system when damping is greater than 0. The dynamic model is analyzed. The results show that the acceleration and displacement amplitude of the surrounding rock of the roadway under impact loading can be greatly reduced by enhancing support and improving supporting strength. Adding damping component in the supporting system is conducive to quelling the vibration of the surrounding rocks quickly, enhancing the anti-impact capacity of supports and improving the stability of the surrounding rocks. The high strength energy absorption support is put forward to prevent and control the rockburst roadway .

Key words： rockburst dynamic model rock support energy absorption and anti-impact

收稿日期: 2014-11-11

TD315

基金资助:辽宁省教育厅科技研究项目(L2015218); 国家自然科学基金青年项目（51404129; 51204090）

作者简介: 唐治(1983- ),男,云南宣威人,博士,讲师,主要从事矿山灾害力学研究。E-mail: tangzhi0127@163.com。

引用本文:

唐治,潘一山,王凯兴. 冲击地压巷道围岩支护作用动力学分析[J]. 岩土工程学报, 2015, 37(8): 1532-1538. TANG Zhi,PAN Yi-shan,WANG Kai-xing. Dynamic analysis of support for surrounding rock of rockburst roadway. Chinese J. Geot. Eng., 2015, 37(8): 1532-1538.

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http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/10.11779/CJGE201508025 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2015/V37/I8/1532

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