煤矿井下定向钻进技术在矿井地质勘探中的应用

Application of Directional Drilling Technology in Underground Coal Mines in Mine Geological Prospecting

目前伴随着我国煤矿高效率的开采技术的全面应用和普及,地下煤层中的地质构造的勘探对煤矿安全、高效的生产开采的影响日益突出。在勘探断层、陷落柱等特殊的地质构造时,主要采用的是三维地震、电法、探地雷达等物探方法,但如果遇到断层间距小于5M的话,断层探测的精度和准确性就往往较低,而常规地质钻孔的方法由于深度浅,钻孔的轨迹无法精确的进行测量,很容易造成巷道探测不清的问题,进一步的影响煤矿生产作业的安全、高效的进行,甚至可能引发煤矿的安全事故的出现。由于具有可控的钻孔轨迹和精确的钻孔轨迹测量和钻孔的距离长度较大等优点,煤矿定向钻进技术在煤矿井下地质勘探中的作用日益突出。

At present,with the comprehensive application and popularization of high-efficiency mining technology in China's coal mines,the exploration of geological structure in underground coal seams has an increasingly prominent impact on the safe and efficient production and mining of coal mines.In the exploration of special geological structures such as faults and subsided columns,three-dimensional seismic,electrical method,ground penetrating radar and other geophysical methods are mainly used.However,if the fault spacing is less than 5m,the accuracy of fault detection is often low.Because of the shallow depth of the conventional geological drilling method,the trajectory of the borehole can not be accurately measured,which is easy to cause the problem of unclear roadway detection,further affect the safety and efficiency of coal mine production,and even lead to the occurrence of coal mine safety accidents.Due to the advantages of controllable drilling track,accurate measurement of borehole trajectory and large distance of borehole,directional drilling technology plays an increasingly prominent role in underground geological exploration of coal mine.