微震监测技术探查导水裂隙带发育高度及规律实测研究

Microseismic monitoring technology for exploring the development height and law of water-conducting fracture zone

为了防止煤层开采后导水裂隙带导通主要含水层对工作面开采造成影响,故开展煤层顶板导水裂隙带发育高度及规律实测研究。利用地表微动监测探查导高新技术,通过现场实测得出数据与公式理论计算、井下压水试验与井下钻孔电视成像、室内数值模拟等研究成果,综合分析,证明地表微动监测探查导高技术是可行的。克服了钻孔施工、压力试验等繁琐工程施工,避免了电视成像卡孔等技术难题,可以确定煤层顶板变形坏后裂隙的发育规律,为煤层开采顶板导高预计以及顶板水害防治工程设计提供参数依据。

In order to prevent the influence of water-conducting fracture zone leading through main aquifer on working face after coal mining,the height and law of water-conducting fracture zone in roof of coal seam were measured and studied.By using the new technology of surface micromotion monitoring and exploration guide,the research results of data and formula calculation,underground water pressure test,underground borehole TV imaging,indoor numerical simulation,etc.were obtained,through comprehensive analysis,it was proved that the technique of ground micromotion monitoring and exploration was feasible.It overcome the tedious engineering construction such as drilling,pressure test and so on,and avoided the technical difficulties such as TV imaging jamming.It can be used to determine the development law of cracks after roof deformation,and provide parameter basis for the prediction of roof height and the design of roof water disaster prevention and control engineering.