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|The upper part of the "Contatto Ovest" orebody, at the San Giovanni Pb-Zn sulphur mine (Sardinia, Italy), is mined by a sublevel caving method. With increasing mining depth, a progressive caving of the hanging wall and discontinuous subsidence occurs. The orebody, which is located very close to the contact between the Cambrian limestones and the Silurian shales, strikes NE-SW for more than 100 m and dips 75-80' NW. The limestone footwall is massive and strong while the hanging-wall consists of very weak shales. The mine considered is located near a town so that the observed subsidence effects must be taken into account for both stability of the nearby railway and houses and morphological and environmental impact. A limiting equilibrium analysis to predict the progress of hanging wall failure with increasing mining depth was used. A suitable computer program was developed for solving the model by a iterative procedure. The progressive hanging wall caving and its consequent superficial effects were predicted perfectly by means of the computer program used and later confirmed by a geophysical test (seismic tomography). Our study ends with a further analysis, carried out using the same procedure, which allows to have a different geometrical situation with the presence of a pillar to protect the mill area.|
Additional chapters/articles from the SME-ICGCM book Ninth Conference on Ground Control Mining Proceedings (ICGCM) 9th
|Multiple-Seam Mining - A State-Of-The-Art Review||Design Aspects In Multiple-Seam Mining: Case Studies||Jenmmar Compression Roof Control System||Specialty Truss System And Their Performance||A Case Study Of Grouted Roof Bolt Loading In A Two-Entry Gat||Analysis And Field Testing Of Presupport Application In Coal||Development Of Roof Stitching As A Method Of Support In Indi||Control Of Roadway Closure In Underground Coal Mines By Side||An Application Of Fem Back Analysis Method To Mine Roadway||Controlled Blasting During Drifting In Hard Rock Mine||Field Test Results On Dyna-Rok And Dyna-Rok Plus Anchors||Mine Pillar Stability Analysis Using Fem Methods - Two Case||An Analytical Approach For The Estimation Of Pillar Strength||International Conference On Ground Control In Mining Design||A New Rock Mass Failure Criteria Based On Rate Of Movement||Practical Consideration In Longwall Support Selection||Mine-Wide Monitoring Applications In Ground Control Research||Longwall Stability Analysis Of A Deep, Bump-Prone Western Co||Stability And Control Of Immediate Roof Of Fully Mechanized||An Analysis Of Longwall Shield Cycle Effectiveness By Polyco||The Impact Of Three Longwall Coal Mines On Streamflow In The||Progressive Failure Of The V-Day Mine And A Comparison With||Controlling Subsidence Effects Using Partial Backfilling||Potential Of A Void Diffusion Model To Predict Longwall Subs||The Use Of Rim- To Detect Geologic Anomalies In The Clarion||The Effect Of Hazardous Geologic Structures On Gateroad Stab||Improved Source Location And Evaluation Of Seismic Events Ov||Application Of Short-Term Time-Dependent Plate Loading Tests||Determination Of Classification Parameters For Clay - Bearin||Intrinsic Response Of Borehole Pressure Cells Laboratory Cal||Application Of Sliding Roof Bar Powered Support For Thick-Se||Drainage Of Water From Abandoned Mines By Horizontal Drillin||A Statistical Analysis Of Falls Of Ground In South African C||Three-Dimensional Analysis Of Mine Dump Point Stability||Birth Of A Longwall-Initial Planning To Post-Subsidence Miti||Progressive Hangingwall Caving And Subsidence Prediction At|