老矿区边坡治理.pptxVIP

Typical Pennsylvania DangerousHighwall Reclamation Project;The Monongahela South No. 1 Dangerous Highwall Reclamation Project was very unique project and everything but a Typical Reclamation Project;Site of the Whiskey Rebellion;Project Location;Background;Site Conditions;St. Anthony’s Church;St. Anthony’s Parochial School;St. Anthony’s Parish House;The Problem;Sign at End of Church Street above Highwall;Highwall – West End of Site;Highwall – Middle of Site;Highwall – East End of Site;High Potential for Continued Rock Falls – School Closed;Design Summary;Selected Alternative;Design Challenges;Design Challenges;Design Challenges;Contracting Summary;Project Construction;Site Access;Access from State Route 481 – Park Avenue;Access Around Parish House;Access Between Highwall and Buildings;Staging Area / Parking Lot;Erosion and Sedimentation Controls;Slope Reduction – Eastern End of Project Site;Initiation of Excavation for Highwall Slope Reduction – East End of Project Site;Bench on Cut Slope;Excess Spoil Disposal;City of Monongahela Disposal Site;Incidental Coal Extraction;Pittsburgh Coal Seam (Avg. Seam Thickness 6-8 feet);Coal Seam Covering;Wire Mesh Reinforcement;Fiber - Reinforced Grout Application;Finished Coal Seam Covering – Looking West;AMD / Stormwater Collection System;Upgrade of Storm Sewer System along Park Avenue, SR481;New Storm Sewer System for St. Anthony’s Parking Area and Church Street Runoff;Conveyance Channel on Cut Slope Bench;Installation of Mine Drainage Conveyance Pipeline;Installation of Mine Drainage Conveyance Pipeline;Sealing of Mine Entries;Mine Opening at Base of Finished Cut Slope;Mine Entries Cleaned Out;Perforated Mine Drain Pipe Installed in Each Entry;Mine Entry Back Stowed with Stone;Block Wall Seal Construction;Finished Mine Seal Construction;Mine Grouting for Subsidence Control;Grout Injection Boreholes;Grout Injection Borehole;Rock Face Support System;Drilling Anchor Holes;Materials;Materials;Installing Rock Netting Bolts;Finish