鄂尔多斯盆地北部中侏罗统沉积相特征及其对中深部矿井涌水量的影响  

Sedimentary facies characteristics of the Middle Jurassic in northern Ordos Basin and their influence on water inflow in the middle and deep mines

作　　者：黄海鱼 丁湘 吴永辉 刘溪 HUANG Haiyu;DING Xiang;WU Yonghui;LIU Xi(China Coal Energy Research Institute Co., Ltd., Xi′an 710054, China;Zhongtian Hechuang Energy Co., Ltd., Ordos 017000, China)

机构地区：[1]中煤能源研究院有限责任公司,陕西西安710054 [2]中天合创能源有限责任公司,内蒙古鄂尔多斯017000

出　　处：《西北大学学报（自然科学版）》2022年第3期508-518,共11页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学重点基金项目(41330315)。

摘　　要：为了准确预测鄂尔多斯盆地北部中深部矿井涌水量及涌水量变化规律,为矿井排水系统的升级改造和防治水工作提供依据,以典型矿井为例,通过系统研究中侏罗统延安组三段及直罗组沉积相特征和“七里镇砂岩”空间展布规律,结合充水含水层分析、工作面顶板探放水情况及采后涌水量变化规律等,探究沉积相特征对中深部矿井涌水量的影响。研究表明,直罗组一段底部的“七里镇砂岩”对矿井涌水量的影响起主导作用;辫状河河道砂坝沉积是形成厚层“七里镇砂岩”的根本原因;辫状河、曲流河及三角洲平原沉积特征的差异性是造成矿井南北两翼工作面涌水量不同的重要原因。To accurately predict the amount of mines′water inflow and its change rule,and provide a basis for upgrading and rebuilding the mine drainage systems and controlling the water,we conducted this study.Taking typical mines as examples,this study systematically studies the sedimentary facies characteristics of the third section of Yan′an Formation and Zhiluo Formation in the Middle Jurassic and the spatial distribution of the"Qilizhen Sandstone",combined with analysis of the water-filled aquifer the water detection and release of the working face roof and the change law of water inflow after mining.And this study expounds the influence of sedimentary facies characteristics on the water inflow in the middle and deep mines.Studies have shown that the"Qilizhen sandstone"at the bottom of the first section of the Zhiluo Formation plays a leading role in the influence of mine water inflow.The sedimentation of braided river channel sand dams is the fundamental reason for the formation of thick layers of"Qilizhen sandstone".The differences of sedimentary characteristics among braided rivers and meanders and the delta plain are important reasons for the difference in water inflow from the north and south wings of the mines.

关 键 词：矿井涌水量 沉积相 七里镇砂岩 中侏罗统 中深部矿井 鄂尔多斯盆地 

分 类 号：P641[天文地球—地质矿产勘探]