煤矿隐伏小断层的瓦斯抽采钻孔探测方法

The concealed small faults detection based on gas drainage boreholes along and cross the coal seam

断层对煤与瓦斯突出危险性影响较大,准确探测断层位置对预防灾害具有重要作用。目前,煤矿进行采掘作业之前,施工大量瓦斯抽采钻孔,但是这些钻孔包含的地质信息未被充分重视,为此,提出了利用穿层、顺层瓦斯抽采钻孔群探测隐伏断层的技术方法。通过建立瓦斯抽采钻孔探测断层的数学模型,计算断层面、煤层底板的三维坐标,通过绘制煤层底板等高线图及其三维图,确定断层位置、落差、产状和断层性质等基础参数。基于Matlab软件的图形用户界面(GUI)工具,编写了瓦斯抽采钻孔探测断层的软件,实现了断层信息的可视化,为准确判识断层提供了技术平台。通过钻孔定位、模型计算、图像处理、断层识别等综合技术方法,成功实现了利用瓦斯抽采钻孔进行隐伏小断层探测。

The faults have great influence on coal and gas outburst disasters,and accurate detection of faults location is very important to prevent such disasters.At present,large number of gas drainage boreholes were drilled in coal mines,but the geological information contained in these boreholes is not fully paid attention to,thus the method to detect concealed faults by gas-drainage boreholes was proposed.In this paper,by establishing a mathematical model for fault detection based on gas drainage drilling,a three-dimensional coordinate of fault planes and coal seam floors is calculated,and basic parameters such as fault location,drop,attitude and fault properties are determined by drawing contour maps of coal seam floors and their three-dimensional maps.Based on the graphical user interface(GUI)of Matlab,a software for fault detection by gas drainage drilling is designed to visualize fault information and provide a technical platform for accurate fault identification.The technical method of detecting small hidden faults by gas drainage drilling is successfully implemented through a combination of drilling location,model calculation,image processing and fault identification.