矽卡岩型铁矿采空区电法勘探应用
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摘要
当铁路通过某矽卡岩铁矿采空区时,受矽卡岩型铁矿产状不规则、采空区情况复杂及附近高压输变电线等外在因素的影响,选取何种勘察方法成为本项目的难点。为了解决这一问题,在对比了多种物探勘测方法后,最终采用了高密度电法结合钻探资料及理论公式的综合勘测手段。研究结果表明,通过对物探结果垂直断面和水平切面的数据解译,可得到采空区的采空边界和影响边界,从而实现对采空区采空范围和影响范围的划分;根据理论公式可计算得到线路距采空区的最小安全距离。相较于以往的大面积钻探,大大降低了勘察成本,提高了勘察设计的工作效率。
When the railway passes through the skarn iron ore goaf,it is difficult to choose the prospecting method for this project due to the influence of external factors such as irregular shape of skarn type iron ore,complex goaf conditions and high-voltage transmission lines nearby. After comparing various geophysical prospecting methods,we adopted a comprehensive survey method combining high-density electrical prospecting with drilling data and theoretical formulas for this problem. The results show that the mined-out area boundary and affecting boundary of goaf can be obtained by interpreting the data of vertical section and horizontal section of geophysical prospecting results. According to the theoretical formulas,the minimum safe distance between the line and the goaf can be calculated. Compared with the previous large-scale drilling,the high-density electrical prospecting greatly reduces the cost of survey and improves the efficiency of survey.
When the railway passes through the skarn iron ore goaf,it is difficult to choose the prospecting method for this project due to the influence of external factors such as irregular shape of skarn type iron ore,complex goaf conditions and high-voltage transmission lines nearby. After comparing various geophysical prospecting methods,we adopted a comprehensive survey method combining high-density electrical prospecting with drilling data and theoretical formulas for this problem. The results show that the mined-out area boundary and affecting boundary of goaf can be obtained by interpreting the data of vertical section and horizontal section of geophysical prospecting results. According to the theoretical formulas,the minimum safe distance between the line and the goaf can be calculated. Compared with the previous large-scale drilling,the high-density electrical prospecting greatly reduces the cost of survey and improves the efficiency of survey.
引文
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[2]张文雨,王斌,胡浩.瞬变电磁法在铁矿采空区勘探中的应用[J].资源信息与工程,2017,32(4):42-45
[3]廖建华.高密度电法勘探在工程勘察中的应用[J].工程建设与设计,2019(4):75-76
[4]蔡劲.高密度电法在工程物探中的应用[J].世界有色金属,2017(7):101-102.
[5]张阳.高密度电法在工程物探中的应用探析[J].中国金属通报,2018(7):148-150.
[6]季凇达.重磁法在牡佳线铁矿采空区勘察中的应用[J].铁道勘察,2017,43(5):99-101.
[7]刘文强.高密度电法勘探技术在山东杨王铁矿采空区勘查中的应用[J].矿产勘查,2018,9(6):1233-1236
[8]鞠同军.铁路通过煤矿采空区时地质选线优化[J].铁道建筑,2014(1):114-115
[9]李志华.铁路煤矿采空区综合物探研究[J].铁道工程学报,2014,31(10):26-31
[10]翟裕生,姚书振,蔡克勤.矿床学(第三版)[M].北京:地质出版社,2011
[11]马传广,李翔,高文峰. InSAR技术在高速铁路采空区地质选线中的应用研究[J].铁道标准设计,2017,61(5):23-27.
[12]陈明星.某采空区沉陷现状及残余沉降预测研究[J].铁道工程学报,2018,35(6):16-20+76.
[13]宋许根,陈从新,夏开宗,等.程潮铁矿塌陷区周边地表变形扩展规律研究[J].岩石力学与工程学报,2018,37(2):415-429.
[14]龚培俐,李维.瞬变电磁法在采空塌陷灾害中的应用—以神东煤矿采空区调查为例[J].地质力学学报,2018,24(3):416-423.
[15]邓睿,杜宇本,蒋良文,等.玉磨铁路采空区段地质选线研究[J].铁道工程学报,2017,34(2):21-25.