Laserfiche WebLink
~~~~d~ED <br />TABLE OF CONTENTS <br />OCT 0 ~ 2003 <br />Division of Minerals and Geoln..v <br />Paae <br />1.0 SUMMARY OF MAJOR RESULTS OF THE 2003 SUBSIDENCE STUDY .....................1 <br />2.0 FIELD DIFFERENTIATION OF CRACKS IN COAL MINING AREAS .............................3 <br />2.1 Subsidence Cracks ..............................................................................................................3 <br />2.2 Construction Cracks ............................................................................................................4 <br />2.3 Desiccation Cracks ..............................................................................................................4 <br />2.4 Gravity-Induced Tension Cracks (Pseudo Subsidence Cracks) .........................................5 <br />3.0 <br />4.0 <br />OVERVIEW OF FIELD SUBSIDENCE STUDIES DURING JULY 22-24, 2003 ..............6 <br />OBSERVATIONS AND EVALUATIONS ALONG FIELD TRAVERSES, AND AT <br />INDIVIDUAL LOCATIONS DURING JULY 22 THROUGH JULY 24 ..............................7 <br />4.1 Subsidence Observations and Evaluations on July 22, 2003 <br />4.1.1 Traverse A-A' ............................................................................... <br />4.1.2 Traverse B-B' ............................................................................... <br />4.1.3 Traverse C-C' ............................................................................... <br />4.1.4 Traverse D-D' ............................................................................... <br />4.1.5 Traverse E-E' ............................................................................... <br />4.2 Subsidence Observations and Evaluations for July 23, 2003 ..................... <br />4.2.1 Traverse F-F' ............................................................................... <br />4.2.2 Traverse G-G' .............................................................................. <br />4.2.3 Traverse H-H' ............................................................................... <br />4.2.4 Traverse I-I' .................................................................................. <br />4.2.5 Traverse J-J' ................................................................................ <br />4.2.6 Traverse K-K' ............................................................................... <br />4.2.7 Traverse L-L' ................................................................................ <br />4.2.8 Traverse M-M' .............................................................................. <br />4.3 Subsidence Observations and Evaluations for July 24, 2003 ..................... <br />4.3.1 Traverse N-N' ............................................................................... <br />4.3.2 Traverse O-O' .............................................................................. <br />4.3.3 Traverse P-P' ............................................................................... <br />.7 <br />................... 7 <br />................... 7 <br />................... 9 <br />.................12 <br />.................13 <br />.................19 <br />................19 <br />................19 <br />................20 <br />................21 <br />................23 <br />................23 <br />................23 <br />_ ...............24 <br />................25 <br />................25 <br />................27 <br />................29 <br />5.0 CONCLUSIONS ............................................................................................................34 <br />