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SEP 2B '93 e1~26PM CYPRUS HFlNNR P.2 <br />• • <br />SUBSIDENCE MONITORING REPORT <br />January -June 1893 <br />Cyprus Twentymile Coal Company, Foidel Creek Mine <br />1,0 SURVEY DATA <br />This report summarizes the survey schedule for and interim results of the subsidence <br />monitoring of longwall mining panels In the Wadge Cosl Seam at the Cyprus Twentymile <br />Coal Company's (TCC) Foidel Creek Mine for the period from January 1993 through <br />June 1993. <br />1.1 Monitoring Schedule <br />Baseline surveys of the Fish Creek AVF monitoring network were completed in early <br />December 1992. Monitoring surveys were on the following dates: <br />Week 1 - 12/15!92 <br />Week 2 - 12/22/82 ,,~L~~~ <br />Week 3 - No Survey Pe ed ~~,~ ~ l <br />Week 4 • 01/07/93 ~J ~ ~ 1 <br />Week 5 - 01/14/93 <br />Week 8 - 01120-93 <br />Week 7 - 01/27/93 ~ <br />Week 8 - 02/04/93 ~~ ~ yv~^~ ~~ ~~`r'~- <br />Month 3 - 03/24/93 ~ ~ Iggs <br />Month 6 - 06/23/93 ~~ y,~Qp-5u ~ ' <br />x <br />1.2 MINING ADVANCE <br /> <br />Mining of the 2 Left longwall panel is started on December 10, 1992. <br />The monthly longwall mining advance for this reporting perlod, as well as total mining to <br />date, are shown on the map, Average extraction height during the reporting perlod was <br />approximately 8.7 ft. The profile lines 3000 and 4000 were located along and across the <br />2 Left longwall panel, respectively. Profile line 1000, located along the centerline of the <br />1 Left longwall panel, was not affected by surface subsidence. <br />C,prvf Tr,engnYb 9aniaxN.y BubdNfm R•ppR <br />BapbRlbR 2~, 7Mf p,y, 1 <br />