摘要
断层、陷落柱、裂隙突水是华北煤田煤层开采面临的重大威胁,对于隐伏构造特征和属性再造是目前亟待解决的关键科学问题。顾北煤矿1煤层属高水压薄阻水层的灰岩岩溶承压水上开采,不仅受底板太原组灰岩水威胁,也受隐伏垂向通道导通奥陶系灰岩水的严重制约。本文基于对顾北煤矿隐伏构造探查和改造工程实践,采用顺层分支双层注浆方法对2陷落柱-断层-裂隙属性进行再造,有效改变其活化性和危害性,提出了单层再造和双层再造两种构造属性改造模式,进一步系统分析研究了顾北煤矿北一1煤层采区2陷落柱及伴生断层的探查、治理过程,重点对区域超前顺层分支探查治理效果进行评价。经检验治理效果良好,建立了以三维地震、垂直钻探技术、顺层分支钻探技术为核心的隐伏构造探查技术新体系。本文研究结果可为煤矿的安全高效开采提供保障,为华北煤田隐伏构造研究提供技术方法和理论支撑。
The major threats of coal seam mining in North China are fault,fall column and fracture water inrush.At present,the key scientific problems to be solved are the implicit construction and attribute reconstruction.The coal seam of Gubei Coal Mine is a high water pressure and thin resistance water layer,which is not only threatened by the limestone water of Taiyuan Group on the bottom plate,but also seriously restricted by the hidden access to the Ordovician system.Based on the practice of hidden structure exploration and reconstruction engineering in Gubei Coal Mine,the straight layer branch double-layer grouting method is used to reconstruct the 2fall column-fault-fracture properties.It effectively changes activation and harmfulness,and putting forward two structural attribute reconstruction modes of single layer reconstruction and double layer reconstruction.This paper provides a further systematic analysis of 2fall column in No.1 coal seam mining area of Gubei Coal Mine and associated fault exploration,management process,and the focus of regional advanced branch exploration management effect.The inspection treatment effect is good.It establishes with three-dimensional seismic,vertical drilling technology,the branch of drilling technology as the core of the hidden structure exploration technology new system.It can provide guarantee for the safe and efficient mining of coal mines,and provide technical methods and theoretical support for the research of hidden structure of North China coal field.
作者
穆金霞
MU Jinxia(The First Hydrogeological Team of China Coal Geology Administration,Handan 056004,China)
出处
《中国矿业》
2022年第8期151-157,共7页
China Mining Magazine
关键词
岩溶陷落柱
断层
裂隙
属性再造
双层注浆
karst collapse column
fault
fissure
property reconstruction
double layer grouting
