摘要
为了研究郭家河井田厚煤层开采条件下顶板突水类型,以一盘区开采工作面为研究背景,通过理论分析及数值模拟相结合的方法,就其水文地质条件与矿井水害特点进行了分析。研究表明,郭家河井田防治水工作的重点主要是预防和治理顶板离层水害,减小洛河组含水层参与的覆岩“离层”积水对工作面生产的威胁。在煤层底板标高较低(如<+720 m)、洛河组底板低洼(<+1 020 m)且厚度较大(>160 m)、向斜轴部、断层及断层带,以及地表河流发育等地段引发离层水的可能性较大。采空区形成后,由于覆岩岩性的不同及应力空间分布的差异,覆岩破坏呈分区破裂形态,从而形成离层积水空间。
In order to study the type of roof water inrush under the condition of thick coal seam mining in Guojiahe mine field, taking the mining face of panel 1 as the research background, the hydrogeological conditions and the characteristics of mine water disaster were analyzed through the combination of theoretical analysis and numerical simulation.The research showed that the focus of water prevention and control work in Guojiahe mine field was mainly to prevent and control the water hazard of roof separation layer, and reduced the threat to the production of the working face caused by the "separation layer" ponding in the overlying rock involved in the Luohe Formation aquifer.It was more likely to cause separated layer water in sections with low coal seam floor elevation(such as160 m),syncline axis, fault and fault zone, and surface river development.After the formation of goaf, due to the difference of overburden lithology and the difference of stress spatial distribution, the overburden failure took the form of partition fracture, thus forming the space of separated layer ponding.
作者
曹海涛
CAO Hai-tao(Shaanxi Guojiahe Coal Industry Co.,Ltd.,Baoji 721500,China)
出处
《煤炭科技》
2022年第6期1-6,21,共7页
Coal Science & Technology Magazine
关键词
突水
水文地质
分区破裂
离层空间
积水分区
数值模拟
water-inrush
hydrogeololgy
zonal disintegration
delamination of space
water partition
numerical simulation
