基于层析成像法的煤矿采空区勘探方法研究

Study on exploration method of coal mine goaf based on tomographic method

为了对某井田采空区的埋深、地理位置以及现状进行精细化了解,确保井田在后期开采过程中矿井开采设计合理,采用层析成像法,研究了煤矿采空区地球物理特征、井田的地质概况以及层析成像在采空区勘探中的应用,采用炸药进行激发,接收点设置在地面,设置10条测线,共设置407道。研究得出:当地震波穿过采空区时,其能量、频率和能量均发生了显著的变化;在研究区,钻孔ZK2、ZK3钻孔位置处出现了显著的低速异常,表明该位置有采空区的存在,然后与实际钻孔资料进行对比分析,得出的反演结果较好地预测了采空区的位置,研究为相同地质条件下井田采空区的探测提供了借鉴。

In order to understand the buried depth,geographic location and present situation of a goaf in a mine field and to ensure the rational design of mine mining in the later stage of mining, the geophysical characteristics of goaf, geological survey of goaf and the application of tomographic imaging in the exploration of goaf were studied by using tomographic imaging method. The explosives were activated,and the receiving points were set on the ground,and 10 measuring lines were set up,with a total of 407 channels. It was concluded that the energy, frequency and energy of seismic wave had changed significantly when it passed through the goaf; in the study area, significant low-speed anomalies occurred at the locations of boreholes ZK2 and ZK3 ,indicating the existence of the goaf, and then compared with the actual borehole data, the inversion results were better. The location of goaf was predicted,and the study provided a reference for the detection of goaf in the same geological condition.