瞬变电磁仪在煤矿超前探水中的应用

Transient Electromagnetic Instrument Is Widely Used for Detecting Water in Advance in a Coal Mine

摘要: 基于新疆天山南麓某矿煤层埋藏浅，大气降水向井下入渗、地面河流对含水层侧向补给，尤其雨季井下水害严重威胁安全生产的水文地质特点，先采用矿用瞬变电磁仪对施工巷道前方进行物探；对探测出的低阻异常区，结合已有勘探地质资料及附近采掘收集的资料进行对比分析，然后设计钻孔、采用钻探进行验证，确定掘进巷道附近的富水异常区位置和范围；并对“两探”超前探测结果依据已有资料加以科学地解释，进而分析大气降水、地面河流对前方施工巷道顶底板含水隐伏含(导)水构造及富水性的影响。实践应用表明，“两探”方法得出的巷道掘进前方含水异常区段赋水性和突水构造，可为掘进巷道防治水措施编制及突水风险防范提供更准确可靠的科学依据；可为相似条件下的探放水提供一定的参考。

Abstract: Based on the fact that coal bed has a shallow buried depth in a Coal Mine, atmospheric precipitation, river supply aquifers by side direction, large goaf area and water accumulation are complex, especially during the rainy season. Firstly, geophysical prospecting is carried out in front of the construction roadway with the mine transient electromagnetic instrument. For the low resistivity anomalous areas detected, the comparative analysis is made on the basis of previous geological data and data collected from nearby excavation. Then drilling is used for verification, so as to find out location and scope of geological structure and water-rich near the roadway. The advanced detection results are scientifically interpreted for the geophysical exploration and drilling of roadways to analyze the influence of meteoric precipitation and surface rivers on the water-bearing concealed water-bearing structure and water-rich property of the roof originating from atmospheric precipitation and the river. Practical application shows that the results of the geophysical exploration and drilling are in good agreement, the geological structure and water-rich area obtained by “two explorations” will provide more accurate and reliable scientific basis for working out safety technology measurement and prevention of water bursting risk in tunneling roadways. At the same time, it can provide some reference for water prospecting under similar conditions.