GROUND BEARING PRESSURES MINI RIG DRILLING MDT MC80V Component Distance to Horizontal Mass (kg) CL rotation moment (M) (KNM) MDT MC80V Base Machine 5706 -0.65 -36.4 Mast Assembly 3036 1.93 57.5 Rear foot pad 1.42 Rotary Head 892 2.32 20.3 CFA 500dia. Auger 1000 2.42 23.7 Track Totals 7710 Pull-Down Force (KN) 60 -0.70 GROUND BEARING PRESSURES Track Bearing Length (M) Track pad width (M) 1.84 0.4 Cross carriage Rear foot pad distance Rear foot Rear foot pad cylinder between pad bearing hydraulic diameter area (M^2) tipping points pressure (bar) (mm) (M) 1.4 64 100 0.17 Rear foot Rear foot Rear foot pad bearing Transformation from triangular pad dim's pad cylinder or trapizoidal to an equivalent pressure (mm) force (kN) rectangular pressure distribution (KPa) under RH. Track maintaining the load centriod 2 x Ф330 50 292 Relative Angle Average track Bearing Bearing Bearing Bearing Upper Body bearing pressure pressure pressure pressure and Tracks pressure front of R.H. rear of R.H. front of L.H. rear of L.H. (degrees) (KPa) track (KPa) track (KPa) track (KPa) track (KPa) Equivalent Track Bearing L (M) Q (KPa) 0.43 219 -53 0 146 0 292 0 292 20/07/2009 GROUND BEARING PRESSURES MINI RIG EXTRACTING MDT MC80V Component Distance to Mass (kg) CL rotation (M) Horizontal moment (KNM) MDT MC80V Base Machine 5706 -0.65 -36.4 Mast Assembly 3036 1.93 57.5 Crawler bearing length (M) Crawler pad width (M) Open track width (M) 1.84 0.4 1.4 Front foot pad Front foot pad Front foot hydraulic cylinder dia. pad bearing pressure (bar) (mm) area (M^2) 191 100 0.56 Mast foot pad dim's (mm) 900 x 620 Front foot Transformation from Front foot pad bearing triangular or trapizoidal to an pad cylinder pressure equivalent rectangular force (kN) (KPa) pressure distribution under RH. Track maintaining the load centriod 150 268 Equivelent Track Bearing Mast foot pad 1.80 Rotary Head 892 2.32 20.3 CFA 500dia. Auger 1000 2.42 23.7 Track Total 5695 0.75 42 Extraction Force (KN) 120 GROUND BEARING PRESSURES Relative Average track Bearing Bearing Bearing Bearing Angle - Upper bearing pressure pressure rear pressure pressure Body and pressure front of R.H. of R.H. front of L.H. rear of L.H. Tracks (KPa) track (KPa) track (KPa) track (KPa) track (KPa) (degrees) 0 134 268 0 268 0 L (M) Q (KPa) 0.35 201 20/07/2009 GROUND BEARING PRESSURES RIG STANDING MDT MC80V Component Mass (kg) Distance to C.L. of track (M) Horizontal moment (kNM) MDT MC80V Base Machine 5706 -0.65 -36.4 Mast Assembly 3036 1.93 57.5 Crawler bearing length (M) Crawler pad width (M) Open track width (M) 1.84 0.4 1.4 Transformation from triangular or trapezoidal to an equivalent rectangular pressure distribution under RH. Track maintaining the load centriod Equivalent Bearing Rotary Head 892 2.32 20.3 CFA 500dia. Auger 1000 2.42 23.7 Equivalent Totals 10634 0.62 65.139 GROUND BEARING PRESSURES Relative Angle Upper body and Tracks (degrees) 0 Average bearing pressure (KPa) 147 Bearing Bearing Bearing Bearing pressure at pressure at pressure at pressure at front of R.H. rear of R.H. front of L.H. rear of L.H. track (KPa) track (KPa) track (KPa) track (KPa) 294 0 294 0 L (M) Q (KPa) 0.59 221 20/07/2009
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