将军戈壁一号煤矿烧变岩界线及地下积水区域分布研究

Study on boundary of burnt rock and regional distribution of underground water in General Gobi No.1 Open-pit Mine

将军戈壁一号露天煤矿首采区拉沟位置位于烧变岩层附近,开挖后烧变岩潜水会顺势流入矿坑,为避免未来开采过程中发生涌水灾害,采用高密度电法、瞬变电磁等工作方法,根据垂向断面电阻率值特征及横向电阻率值变化特征推断火烧区及富水区域。根据瞬变电磁圈定的水文异常范围,运用高密度电法进行加密二次验证;在物探区西北部及南部共圈定2处地下富水区域,并对不同层位的积水及火烧边界进行了推测,为进一步的工程施工勘查提供了依据。

The trench in the first mining area of General Gobi No.1 Open-pit Mine is located near the burnt rock.After excavation,the burnt rock phreatic water will flow into the mine.In order to avoid the water inrush disaster in the future mining process,we use high-density electrical method and transient electromagnetic method to infer the burning area and water-rich area according to the characteristics of vertical section resistivity value and transverse resistivity value change.According to the hydrological anomaly range delineated by transient electromagnetic,the second verification of encryption is carried out by using high-density electrical method.Two underground water-rich areas are delineated in the northwest and south of geophysical exploration area,and the boundary of accumulated water and fire in different layers is speculated,which provides a basis for further engineering construction exploration.