Designed Parameters Calculation Method of Borehole Drilling Through Inclined Seam for Gas Pressure Measuring

In order to accurately determine the parameters of the pressure measuring borehole drilling through seam, based on No. 15 seam gateway and the high I evel gas drainage gateway in Hongyuan Mine as a prototype, the geometrical model of the pressure measuring borehole drilling through the seam was established. Acc ording to a space layer relationship between the pressure measuring borehole drilling through the seam and the inclined seam in the model, the paper discussed a false inclination affected to the calculation of the borehole length and a geometrical formula to calculate the borehole length and the rock borehole length was obtained. Base d on an Excel data processing software, a program to calculate the length of the pressure measuring borehole drilling through the seam was compiled and written.The P rogram found that the error between the theoretical length and the actual length was less than 1 m. The accuracy of the calculation formula was verified and the applica tion of the calculation formula could improve the design efficiency and the site construction accuracy.