Time-lapse geophysical technology-based study on overburden strata changes induced by modern coal mining  

作　　者：Wenfeng Du Suping Peng Guowei Zhu Feng Yang 

机构地区：[1]State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Beijing 100083,China

出　　处：《International Journal of Coal Science & Technology》2014年第2期184-191,共8页国际煤炭科学技术学报（英文）

基　　金：National Science and Technology Supporting Program(2012BAB13B01);National Key Scientific Instrument and Equipment Development Program(2012YQ030126);Coal United Project of National Natural Science Foundation(U1261203);China Geological Survey Project(1212011220798);National Science and Technology Major Project(2011ZX05035-004-001HZ).

摘　　要：To study the impact of modern coal mining on overlying strata and its water bearing conditions,integrated time-lapse geophysical prospecting integrating 3D seismic,electrical and ground penetrating radar method were used.Through observing and analyzing the geophysical data variations of all stages of pre-mining,mining and post-mining as well as post-mining deposition stable period,impacts of coal mining on stratigraphic structure and its water bearing were studied and modern coal mining induced stratigraphic change pattern was summarized.The research result shows that the stratigraphic structure and the water bearing of surface layer during modern coal mining have self-healing pattern with mining time;the self-healing capability of near-surface strata is relatively strong while the roof weak;water bearing selfhealing of near-surface strata is relatively high while the roof strata adjacent to mined coal beds low.Due to integrated time-lapse geophysical prospecting technology has extra time dimension which makes up the deficiency of static analysis of conventional geophysical methods,it can better highlight the dynamic changes of modern coal mining induced overburden strata and its water bearing conditions.

关 键 词：Time lapse Geophysical prospecting Coal mining Overburden strata Strata changes Modern coalmining 

分 类 号：P61[天文地球—矿床学]