白马铁矿田家村南采区爆破测振及村民房屋影响研究  

Study on Blasting Vibration Measurement and Influence on Villagers′Houses Safety in South Mining Area of Tianjiacun South Stope in Baima Iron Mine

作　　者：胡方强 张春阳[2] 谭海[2] 姜婷婷[2] KABILA Kevin Mbuyu HU Fang-qiang;ZHANG Chun-yang;TAN Hai;JIANG Ting-ting;KABILA Kevin Mbuyu(Pangang Group Mining Co.,Ltd,Panzhihua 617000,China;School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]攀钢集团矿业有限公司,攀枝花617000 [2]武汉理工大学资源与环境工程学院,武汉430070

出　　处：《爆破》2021年第2期73-79,共7页Blasting

基　　金：国家自然科学基金青年项目(51804236)。

摘　　要：为弄清白马铁矿田家村南采区露天台阶爆破振动对村民房屋的影响,结合房屋位置、露天采场现状、地质地貌特征、岩土体非均质特性,采用L20系列智能爆破测振仪进行爆破测振研究。测试结束后,采用最小二乘法对数据进行回归分析,获取了对应的K、α值,得出了各方向爆破振速的衰减规律,验证结果反映了K、α回归值的可靠性。对2019年7月—2020年10月田家村南采场1525 m、1540 m、1555 m台阶爆破振速进行反算,其中最大振速位于Z方向,值为0.33 cm/s,为田家村房屋爆破振动影响评估提供了依据。结果表明:村内测点爆破振速均不超过《爆破安全规程(GB6722—2014)》中“土窑洞、土坯房、毛石房屋”和“一般民用建筑物”爆破振动安全允许标准范围,但需考虑爆破振动对土坯房的长期影响,以及砖混房屋装饰、外瓷砖、灰抹层等非承重结构的长期影响,并以现场调查为准,对砖混房屋承重结构不构成安全影响。此外,结合设计资料,预测了将来的爆破振速,最大值位于Z方向,为0.54 cm/s,超过了土坯房的安全振速标准(0.45 cm/s,f≤10 Hz),但仍低于“一般民用建筑物”爆破振动安全允许标准(2.0 cm/s,f≤10 Hz)。最后,提出了降低单孔药量及推进数码电子雷管应用等相关建议。In order to ascertain the impact of vibration on the villagers′houses caused by bench blasting in south mining area of Tianjiacun south stope in Baima Iron Mine,combined with location of the houses,current situation of open-pit,geology and geomorphology characteristics,and the heterogeneity of rock and soil mass,the blasting vibration measurement was studied with the L20 series intelligent blasting vibration measuring instrument.After that,the least square method was used to carry out regression analysis on the data to obtain the corresponding values K,αvalues and the attenuation law of blasting vibration velocity in each direction,respectively.It can be seen that the validation results reflect the reliability of regression values of K andα.Furthermore,the vibration velocity of 1525 m,1540 m and 1555 m Benches in south stope of Tianjiacun village from July 2019 to October 2020 were calculated in reverse.Among them,the maximum vibration velocity is 0.33 cm/s located in the Z direction,which provided a basis for evaluating the impact of blasting vibration on the houses.The results show that the blasting vibration velocities of the measuring points are no more than the permittable safety blasting vibration range of“earth cave,adobe house,stone house”and“general civil buildings”in《blasting safety regulations(GB672—2014)》.However,it is necessary to consider the long-term impact of blasting vibration on adobe house,as well as the decoration,exterior wall tiles,plaster layer,and other non-load-bearing structures of brick-concrete buildings,and take the field investigation as the criterion.However,it does not affect the safety of the load-bearing structure of brick-concrete buildings.In addition,combined with the design data,the blasting vibration velocity in the future is predicted,the maximum value is 0.54 cm/s in the Z direction,which exceeds the safety vibration standard of“earth cave,adobe house,stone house”(0.45 cm/s,f≤10 Hz).However,it is still lower than the safety allowable blasting vibra

关 键 词：台阶爆破 村民房屋 爆破测振 爆破振速 露天采场 

分 类 号：TD235.3[矿业工程—矿井建设]