小煤窑采空区物探技术在铁路工程地质勘察中的应用

THE APPLICATION OF SMALL COAL PIT GOAF GEOPHYSICAL TECHNOLOGY TO THE RAILWAY ENGINEERING GEOLOGICAL EXPLORATION

综合勘探阶段的实际情况、探测深度和探测精度等因素,探讨了物探方法的选择及其组合特点,归纳了各种物探资料对应的小煤窑采空区的异常特征。通过单一或综合物探方法,结合地质调查及钻探资料,可划分出小煤窑采空区的发育段落并指导钻探孔位的布置,部分或比较宏观地解决了小煤窑采空区的勘察问题。同时,根据物探资料可对采空区的工程地质条件进行评价。

Synthesizing such factors as actual situation of exploration stage, detection depth and detection precision, the authors tentatively discuss the choice and combination of geophysical methods, analyze characteristics of various methods, and sum up the anomaly features reflected by data obtained by various geophysical methods which correspond to coal pit goaf. By utilization of a single geophysi- cal method or integrated geophysical technology in combination with geological and drilling data, we can recognize the development stage of the small coal pit goaf and guide the deployment of the drill holes, thus partially or quite macroscopically solve the problem of detecting small coal pit goaf. In addition, according to geophysical data, we can evaluate the engineering conditions of the goaf.