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MINING LOCATIONS AND PROJECTIONS <br />Advancement of Panel H and pillar retreat of Panel Goff of the 2nd 4+est Submains <br />has entailed the major mining functions since July 1, 1989. <br />Panel G Gras originally projected to intercept the 47' displacement fault oriented <br />in a northwest direction off the North Mains of the sealed Orchard Valley Mine. <br />However, Panel G development did not proceed as far north as originally planned, <br />due to the thickening interburden between the upper and lower D seam and, conse- <br />quently, thinning of the upper D seam. Mining was completed in this panel on <br />July 17, 1989. <br />Projections for the remaining part of 1989, continuing into 1990, will consist of <br />advancement and pillar extraction of Panel N. Panel N will he mined similar to <br />Panel G (see One-Year Projections Map). <br />MINE INFLOW <br />The Mine Inflow Study a[ the Orchard Valley West Mine was completed in Julv of <br />1989. Total natural mine inflow at present is at 1,350,000 gallons annually, <br />which equates to an inflow of 2.57 gallons per minute. <br />The main source of mine inflow is the raise-bored shaft at crosscut 4k10 of the <br />South III Submains. The pilot hole for the shaft was drilled approximately one <br />year ago, at which time inflow was present. The 16' diameter raise bore project <br />was completed in January of 1989. Grouting and shotcreting of the shaft is <br />planned for the fall of 1989. Grouting should eliminate or substantially reduce <br />the inflow at the shaft. <br />The remaining inflow at the Orchard Valley West T+ine consists of seepage from <br />both the roof and floor, but predominantly from the floor. 'The majority of seeps <br />last approximately one to four weeks after exposing the ribs, etc. with the con- <br />tinuous miner. Measurable flow seldom occurs within the Orchard Valley iaest <br />Mine, as most of the seeps exist as wet strata. <br />Panel G had small seeps evident near the 4120 crosscut area, which were in combi- <br />nation with minor lateral shears oriented in a northeast direction, almost <br />parallel to the coal cleat line. The lateral shears exhibited random moist <br />areas. Overall, Panel G was consistent with the remainder of the mine as a <br />relatively dry mine. <br />Cyprus has no plans for discharge of the water from within the mine to the sur- <br />face. No water has been p+vnped from the Orchard Valley iaest Mine. If excessive <br />mine inflow does occur, this excess water will be p+nnped into the northern end of <br />South III Submain, which was sealed in January of 1989, after placing the waste <br />rock from [he raise bored ventilation shaft inby the seals, between 4F17 and 4k18 <br />crosscuts. 'This area will be available to handle any future excess water. <br />WATER IMPORTATION AND BALANCE <br />Approximately 612,300 tons of coal was produced from the Orchard Valley West Mine <br />from July 1, 1988 through June 30, 1989. Actual tonnages increased from wfiat was <br />anticipated, due [o an increase in sales toward the latter half of 1988, Produc- <br />tion for the upcoming year is estimated at 600,000 tons; however, this will be <br />dependent on the future marketing situation. <br />