MINING AND TUNNELING MACHINERY BUKS_1U5 The drilling unit BUKS-1u5 is designed for mechanization of drilling blast holes, cementation, methane drainage and prospecting boreholes while sinking vertical shafts from 4.0 to 9.0 m in diameter in the finished section combined with the KS-type muckers. Parameters Ultimate strength of the drilled rock, MPa, max 230 (f=20) Output, m/min    - at the rock hardness sñîmp up to 150 MPa 1.90  - at the rock hardness sñîmp up to 230 MPa 0.92  - while drilling boreholes 0.16 Drilling depth, m:    - while drilling blastholes 4.4  - while drilling boreholes 50.0 Number of drilling machines, pcs:    - while drilling blastholes 4…2  - while drilling boreholes 2 Drill bit diameter, m 42…52 Angle of inclination of the drilling machine to the vertical, deg. 20 Compressed air pressure, MPa (kgf/cm2) 0.5 Air flow rate per one drilling machine, m3/min 14.2 Water flow rate per one flushing of 100 m of blastholes or boreholes, m3 1.0 Overall dimensions of a unit removable part in a transportation position, mm:    - diameter of circumscribed circle 1950  - height 9500 Weight of outfit as delivered, kg 9300…11900 Selection of the drilling machine mechanism is defined by the hardness of rocks driven. Two types of rock drills are supplied with the machine: * for rock hardness s??, up to 150 MPa – M2 type * for rock hardness s??, up to 230 MPa – PK-60 type The plant’s design bureau is capable to work out and complete machines also with other equipment depending on customer demands