摘要
我国煤炭资源开采强度大、范围广,特殊地质环境下巷道支护长期稳定是保证矿井安全、高效生产的必要条件。支护构件与围岩共同作用支护巷道时,常受地下水影响,诱发支护效能弱化。基于大南湖7号煤矿强盐碱水含水层、弱胶结软岩的开采地质条件,通过理论分析、数值计算和现场试验等方法,在不同盐碱水腐蚀时间下对支护体进行拉拔试验;分析淋水量及腐蚀时间和盐碱性强度对支护体界面黏结强度和支护效能的影响规律;基于数值模拟,分析强盐碱水条件下支护系统失效机制,揭示腐蚀条件下锚固参数对支护体界面稳定性影响规律,为强盐碱水环境下弱胶结围岩支护效能控制技术提供理论依据。
Coal mining intensity is high and the mining area is extensive in China.The long-term stability of support structures in special geological environments is a necessary conditions for ensuring the safety and efficient production of coal mines.When support structures work together with the surrounding rock to support the roadway,they are often affected by groundwater,which can weaken the support effectiveness.Based on the mining geological conditions of the No.7 coal mine in Dannanhu,where there is a strong saltwater aquifer and weakly bonded soft rock,this paper uses theoretical analysis,numerical calculation,and on-site tests to conduct pull-out tests on support structures under different corrosion times of saltwater;analyzes the influential laws of the amount of water and corrosion time,as well as the strength of salt and alkalinity,on the interface bond strength and support effectiveness;and conducts numerical simulations to analyze the failure mechanism of the support system under strong saltwater conditions,revealing the law of the influence of anchoring parameters on the stability of the interface under corrosion conditions,providing theoretical support for the control of support effectiveness in strong saltwater environments with weakly bonded rock.
作者
蔡瑞春
CAI Ruichun(China Coal Group Xinjiang Energy Co.,Ltd.,Urumqi 830026,China)
出处
《陕西煤炭》
2025年第12期137-141,共5页
Shaanxi Coal
关键词
强盐碱水
腐蚀
效能衰减
失效机制
strong saline-alkaline water
corrosion
performance attenuation
failure mechanism
