Estimation Of Minor Or Shock Losses In Mine Aerodynamics Has Been An Area Mostly Dependent On Empirical Knowledge. One Can Only Make Use Of Findings Derived From Scale Model Studies That Replicate Real Life Situations Of Shock Losses As Closely As Possible. These Findings From Scale Model Studies Become Useful Provided The Laws Of Geometric And Dynamic Similitude Are Maintained Between Scale Model Investigations And Real World Phenomenon. Obtaining Readymade Information For Any Arbitrary Shock Loss Situation Is Therefore Not Possible. While Certain Typical Situations Of Shock Losses Have Been Investigated Comprehensively, The Available Database Is Still Inadequate. Further, Within The Published Literature, The Procedures For The Estimation Of Shock Loss Coefficients (Slc) Are Quite Variable And The Values Of Slc Need Not Necessarily Agree And Often Differ By A Wide Margin. The Present Research Work Is Thus Taken Up With A View To Examine The Shock Loss Coefficients By Conducting Experiments And Also By Performing Numerical Investigations, On A Few And Limited Shock Loss Configurations. Two-Way And Three-Way Splits And Junctions Are Studied Such That The Geometry Intersections Are Square And Maintain 900 Angles, And Also, All The Rectangular Roadways That Make Up The Junctions And Splits Maintain The Same Cross-Section Area. While Three-Way Splits And Junctions Having Orientation As Stated Are Fairly Common In Mine Ventilation, Literature Available In Mine Ventilation Offers No Scope At All To Establish The Shock Losses. Experiments Are Conducted In The Mine Ventilation Laboratory On Duct Work Of Cross-Section 20 Cm X 15 Cm Fabricated Using Plexiglas And Masonite Sheets. The Effect Of Roughness On Slcs Is Also Studied By Pasting Bubble Plastic Sheeting To The Interior Of The Duct Work. Using The Laboratory Scale Ventilation Fans Splitting And Combining Flow Situations Are Created. Experiments Are Conducted Under Fully Developed Turbulent Flow Conditions At The Inlet Points And Measurements For Velocity And Static Pressures Are Taken At Locations Far Removed From Intersections In Order To Ensure Conditions That Measurement Stations Do Not Fall