焦建康.动载扰动下巷道锚固承载结构稳定性影响因素分析[J].河南理工大学学报（自然科学版）,2021,40(4):19-27.

JIAO J K.Analysis on influencing factors of stability of anchorage bearing structure of roadway under dynamic load[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(4):19-27.

动载扰动下巷道锚固承载结构稳定性影响因素分析

焦建康1,2,3

1.中煤科工开采研究院有限公司，北京 100013;2.天地科技股份有限公司 开采设计事业部，北京 100013;3.煤炭科学研究总院开采研究分院，北京 100013

摘要:针对冲击地压巷道锚固承载结构破坏机理的复杂性和变形影响因素的多样性，基于响应面法试验设计和数据分析功能，采用有限差分数值软件动力模块，定量化研究围岩强度、震源距离、震源强度、原岩应力、支护强度等单一因素以及多因素交互作用对巷道锚固承载结构变形的影响规律。结果表明：单一因素和多因素交互作用对锚固承载结构变形都有显著影响，单因素影响程度依次为围岩强度 ＞震源强度 ＞震源距离 ＞原岩应力 ＞支护强度；通过增大震源传播距离、增加动载衰减系数、提高支护强度、增加围岩自承载能力、减小静载应力集中均可以有效降低冲击地压巷道锚固承载结构的变形量；多因素交互作用下巷道锚固承载结构的破坏模式可分为锚杆断裂型、锚固脱黏型、岩体主导型和复合型。针对不同的破坏模式，提出高冲击韧性锚杆全长预应力支护、“外锚内注”和“深部卸压-浅部强支-巷表防护”等控制技术。研究结果可为冲击地压巷道锚固承载结构稳定性控制提供理论依据。

关键词:冲击地压;动载扰动;锚固承载结构;响应面法;数值模拟

doi:10.16186/j.cnki.1673-9787.2020100016

基金项目:天地科技股份有限公司科技创新创业专项基金资助项目（2020-TD-QN008 ，2018-TD-MS027兀国家自然科学基金资助项目 （51974160，51804159

收稿日期:2020/10/10

修回日期:2021/01/27

出版日期:2021/07/15

Analysis on influencing factors of stability of anchorage bearing structure of roadway under dynamic load

JIAO Jiankang1,2,3

1.Coal Mining Research Institute， China Coal Technology Engineering Group ， Beijing  100013 ， China;2.Coal Mining and Design Department， Tiandi Science & Technology Co. ，Ltd. ， Beijing  100013 ， China;3.Coal Mining Branch ， China Coal Research Institute， Beijing  100013 ， China

Abstract:In view of the complexity of the failure mechanism and the diversity of the influencing factors of the anchoring surrounding rock in the rockburst roadway， based on the experimental design and data analysis function of response surface method， the deformation law and failure mode of the anchorage bearing structure under the influence of single factor and multiple factors， such as surrounding rock strength， microseismic source distance from its position to roadway， microseismic source strength， initial rock stress and support strength， were quantitatively studied by using the finite difference numerical software dynamic module. The results showed that the interaction of single factor and multi-factors had significant influence on the deformation of anchorage bearing structure， and the order of single influencing degree was ： surrounding rock strength ＞ microseismic source strength〉microseismic source distance〉initial rock stress〉support strength. By increasing the microseismic source propagation distance， increasing the dynamic load attenuation coefficient， improving the support strength， increasing the surrounding rock self-bearing capacity， or reducing the static load stress concentration， the deformation of the anchorage bearing structure of rockburst roadway could be effectively reduced. The failure modes of roadway anchorage bearing structure under the condition of multi-factors combination could be divided into bolt fracture type， anchorage debonding type， rock mass dominant type and composite type. According to different failure modes， herarchical and differentiated control technologies including“ full-length prestressed support with high impact and toughness anchor” ，"ternal anchoring internal grouting ” and " deep surrounding rock pressure relief-shallow surrounding rock strong support-roadway surface protection“ were put forward. The research results could provide a theoretical basis on the stability control of ahchorage bearing structure of rockburst roadway.

Key words:rockburst;dynamic load;anchorage bearing structure;response surface method;numerical simulation

 动载扰动下巷道锚固承载结构稳定性影响因素分析_焦建康.pdf