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Average SubslJvnce bl U~q,th <br />. ex~' <br />~.-175~~-IBI'~*17~-x}19'{ = B96' <br />;':___ '7 <br />~ ~ / <br />„ ~YS 5 ~ <br />\ ~ / <br />091 >I~-.19~ <br />weighted average x8_61 (827) + (8.6) (19) <br />2 <br />846 <br />31.2 (827) +(3].2)(19) <br />2 <br />846 <br />B. Fault Block 3 <br />1. Average subsidence @ the recovery line <br />. a, average depth - approximately 80' <br />b. critical width - 104' <br />c. width of workings - 1050' <br />d. maximum subsidence - 19" - 67" <br />F32 ~. 90fi 32'~ <br />c--- <br />loso' <br />= 4.4" to <br />= 16.0" <br />T <br />0 <br />Since the fault line angle is less than the expected angle of draw <br />of 250, the width of subsidc•nre is approximately the measured width <br />of the workings. ' <br />average subsJdence /]9 1 (]04) + (19) (94G) = 18.1." to <br />/` 2 <br />]050 <br />67\ (104) + (G7) (94G) = L3. 7" <br />~ 2- ------- ----- <br />I()~ill <br />2.09 <br />D. H. EMLING COMPANY <br />