基于微动技术的综合探测体系在乌鲁木齐城市地下空间精细化探测中的应用研究

Application of integrated exploration system based on microtremor technology in fine exploration of urban underground space aturumqi

城市地下空间的安全、合理利用对城市发展和地质环境保护具有重要的战略意义.乌鲁木齐市位于天山北部山前冲积扇,区内以卵砾石为主的覆盖层厚度变化范围大,第三系基岩受区域构造控制,空间形态复杂,区域断层多呈现隐伏形态.同时,乌鲁木齐市煤炭资源丰富,由此产生的“老、乱、小”采空区严重威胁城市地质安全.为查明区内各类地层、构造及不良地质体的空间位置,需采取地球物理多方法联合勘探以实现地下空间的精细化探测.本文以乌鲁木齐市四类典型地质体为探测目标,综合应用多种地球物理探测技术,结合地质先验信息分析评价了每种探测方法的有效性和局限性,建立了乌鲁木齐城市地下空间精细化探测体系,为其他内陆型城市地质调查工作提供依据和借鉴.

The safe and rational utilization of urban underground space has important strategic significance for urban development and geological environment protection.ürümqi is located in the piedmont alluvial plain in the north of Tianshan Mountain. The thickness of the overburden dominated with gravel varies widely. The spatial shape tertiary bedrock is complex because of controlling by the regional structure, and the regional faults are mostly concealed. At the same time, ürümqi is rich in coal resources, so that goaf is a serious threat to urban geological safety. In order to find out the spatial location of various strata, structures and unfavorable geological bodies in the area and realize the fine exploration of underground space, it is necessary to use multi-geophysical method joint exploration. Taking four types of typical geological bodies in ürümqi as the exploration target, this paper comprehensively applies multi-geophysical exploration technologies, analyzes and evaluates the effectiveness and limitations of each exploration method combined with geological prior information,and establishes a fine exploration system ofürümqi urban underground space,which provides basis and reference for geological investigation in other inland cities.