摘要
掌握采空区地面变形规律是科学预防和治理地面塌陷的前提与基础,是煤矿地质环境动态变化的重要监测内容。以宁东煤炭基地金凤煤矿为例,在收集、了解金凤煤矿0110202和011805工作面开采时间、开采深度、开采煤厚、工作面长度、工作面宽度、工作面走向等参数的基础上,建立工作面地表自动化GPS监测点,将工作面开采进程与地面变形时间、空间统一起来,研究工作面地面变形时间和变形量的规律。结果表明,金凤煤矿011202工作面地面变形一般在采后13个月左右进入变形活跃阶段,从开始变形到地面开始稳定的持续时间为16~19个月,最大累积变形量约为3300mm;011805工作面采空区地面变形一般在采后10~11个月进入变形活跃阶段,从开始变形到地面开始稳定的持续时间为13~16个月,最大累积变形量约为2600mm。研究结果为金凤煤矿后续工作面开采地表变形规律及类似开采条件下采空塌陷的预防与治理提供了定量化的依据。
To master the law of ground deformation in the goaf is the prerequisite and foundation for scientific prevention and control of ground collapse,and also an important monitoring content for the dynamic change of the geological environment of the mine.With Jinfeng coal mine in Ningdong coal base as a study case and on the basis of collecting and understanding the mining time,mining depth,mining coal thickness,length of working face,width of working face and direction of working face,the authors set up the automatic GPS monitoring point on the surface of the working face of Jinfeng coal mine.The mining process is unified with the time and space of ground deformation.The authors tried to study the law of ground deformation time and deformation under mining and similar mining conditions.The result shows that the ground deformation of011202working face was usually subjected to severe deformation about13months after mining and reached the stability15-17months after the beginning of deformation,with the maximum cumulative variable being about3300mm.The ground deformation in the goaf of011805working face usually occurred violently10-11months after mining and reached the stability13-16months after the beginning of deformation,with the maximum cumulative variable being about2600mm.The research results provide quantitative basis for the prevention of surface subsidence and the prevention and treatment of gob collapse under similar mining conditions.
作者
王国瑞
徐友宁
程霞
张佳
WANG Guorui;XU Youning;CHENG Xia;ZHANG Jia(Ningxia Survey and Monitor Institute of Land and Resources, Yinchuan 750002 Ningxia, China;China University of Mining and Technology(Beijing), Beijing 100083, China;Xi'an Center of Geological Survey, CGS, Xi'an 710054, Shaanxi, China)
出处
《地质通报》
CAS
CSCD
北大核心
2018年第12期2199-2207,共9页
Geological Bulletin of China
基金
中国地质调查局项目<秦岭及宁东矿产资源集中开采区地质环境调查>(编号:DD20160336)
<青海矿业开发地质环境效应调查>(编号:121201122024)
关键词
煤矿采空区
地面变形
GPS监测
变形规律
金凤煤矿
coal-mining area
ground deformation
GPS monitoring
deformation law
Jinfeng coal mine