Study On Horizontal Directional Drilling In The MC-DF29 Fault Dectection Hole

Fault as a common geological structure of coal body,seriously affecting the mine safety production,how to accurately detect to fault occurrence,has become an important subject in research of coal mine.At present,the ordinary drilling method adopted by the coal mine,due to the limitation of technical conditions,mainly has great error in the detection distance is short,,drilling accident rate is high,shortcomings and so on single single-hole drilling Angle.Directional drilling technology as a new drilling method,to fully compensate for the above problems,and has been successfully applied in many engineering fields.Therefore,in the coal mine of the fault detection of the introduction of directional drilling technology and summarizes a set of suitable for coal mine drilling equipment in the field of it is of great significance.Taking mengcun coal mine,this paper is to DF29 fault detection as the background,the nearly horizontal directional drilling technology is proposed,based on advanced measurement and control technology while drilling,but the real drilling borehole trajectory real-time measurement and control precision,the hole by directional drilling construction technology to realize remote detection in advance,the use of sidetrackling technology branch hole near the fault branch borehole construction many Angle and azimuth,after trajectory measurement to calculate the three-dimensional coordinates of geologic abnormal body,and gets the fault geological spatial information.Through successful application in taking mengcun DF29 fault detection in mine,gives the borehole trajectory design theory,structure and summarizes a set of drilling technology and drilling borehole accident prevention and handling technology,It provides a new idea,for the other faults in the mine and other faults in the bin long mine.