高温碱水巷道锚杆腐蚀机理与热浸锌防腐围岩控制技术研究  

Research on the corrosion mechanism of bolt in roadway with high temperature alkaline gushing water and the surrounding rock control technology with hot-dip zinc galvanizing anti-corrosion

作　　者：陈勇 范钢伟[2] 武振 殷聪 刘光旭 敦思勤 CHEN Yong;FAN Gangwei;WU Zhen;YIN Cong;LIU Guangxu;DUN Siqin(Yankuang Energy Group Co.,Ltd.,Jining,Shandong 273500,China;School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]兖矿能源集团股份有限公司,山东省济宁市273500 [2]中国矿业大学矿业工程学院,江苏省徐州市221116

出　　处：《中国煤炭》2024年第8期104-111,共8页China Coal

基　　金：中央高校基本科研业务费专项资金项目(2021ZDPY0266)。

摘　　要：针对高温、碱性淋涌水(以下简称“碱水”)条件下锚杆腐蚀破坏造成的巷道严重变形与支护失效难题,以兖煤菏泽能化有限公司赵楼煤矿(以下简称“赵楼煤矿”)5305运输巷为研究背景,通过实验室实验,分析碱水、高温共同作用下锚杆腐蚀破坏特征和力学性能衰减规律,揭示锚杆腐蚀破坏机理,进而确定锚杆热浸锌防腐关键参数,并揭示其防腐机理。研究结果表明,锚杆腐蚀呈现出由肋间“点”到锚杆“面”的渐序腐蚀变化过程;锚杆体屈服载荷、破断载荷随侵蚀时间的增大呈线性下降,延伸率随侵蚀时间的增大呈负指数函数降低。高温、碱水作用下铁离子循环发生氧化和脱水反应,生成Fe_(2)O_(3)并脱落是锚杆腐蚀破坏的内在机理;锚杆热浸锌可有效提高其耐腐蚀性能,且最佳热浸锌厚度为60μm。高温、碱水作用下浸锌锚杆表面生产稳定的ZnO钝化层可有效阻止锚杆腐蚀破坏和力学性能衰减。通过赵楼煤矿现场工业性试验,验证了锚杆热浸锌防腐与围岩控制的有效性。In response to the severe deformation and support failure caused by anchor bolt corrosion and damage under high temperature and alkaline gushing water(hereinafter referred to as"alkaline water")conditions,taking the 5305 transport roadway of Zhaolou Coal Mine of Yanmei Heze Energy and Chemical Co.,Ltd.(hereinafter referred to as"Zhaolou Coal Mine")as the research background,the characteristics of anchor bolt corrosion and damage and the attenuation law of mechanical properties under the combined action of alkaline water and high temperature were analyzed by laboratory experiments,which revealed the mechanism of anchor bolt corrosion and damage and then determined the key parameters and mechanisms of hot-dip galvanizing anti-corrosion for anchor bolts.The research results indicated that the corrosion of anchor bolts presented a gradual corrosion process from the"point"between ribs to the"surface"of the anchor bolt;the yield load and fracture load of the anchor bolt body decreased linearly with the increase of erosion time,and the elongation rate decreased negatively exponentially with the increase of erosion time.Under the action of high temperature and alkaline water,iron ions underwent oxidation and dehydration reactions,generating Fe_(2)O_(3) and shedding,which was the inherent mechanism of anchor bolt corrosion and damage.Hot-dip galvanizing for anchor bolts could effectively improve their corrosion resistance,and the optimal hot-dip galvanizing thickness was 60μm.The stable ZnO passivation layer produced on the surface of zinc galvanizing anchor bolts under high temperature and alkaline water could effectively prevent corrosion damage and mechanical performance degradation.The effectiveness of hot-dip galvanizing anti-corrosion of anchor bolts and surrounding rock control technology was verified through on-site industrial tests in Zhaolou Coal Mine.

关 键 词：高温 碱水 锚杆腐蚀 热浸锌防腐 巷道围岩控制 

分 类 号：TD353[矿业工程—矿井建设]