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THICKENER UNDERFLOW WELL DIAGRAM <br />05/27/2010 <br />NOT TO SCALE <br />STUFFING BOX WELL HEAD <br />DRILLING AND REAMING PHASE <br />SAMPLE TUBE WITH METHANE M❑NIT❑R <br />DISCHARGE AIR WITH SAMPLE TUBE <br />VALVE ON DISCHARGE AIRLINE <br />NOTEt <br />L) FIRST A NOMINAL 74 3/4' H0.E IS DRILLED TO A <br />DEPTH OF APPROX.I2D' FROM THE SURFACE FOR IN—PLACE <br />GROUTING OF A MAX. 14' DIAL STEEL SURFACE CASING. <br />2.) THEN A NOMINAL 6 1/4' PILOT HOLE IS DRILLED TO <br />WITHIN 15' OF THE MINE ROOF. <br />3J THE NOMINAL 6 1/4' PILOT HOLE WILL THEN BE REAMED <br />TO A NOMINAL 11' DIAMETER TO WITHIN 15' OF THE MINE ROOF. <br />4J ALL DRILLING L REAMING WILL BE STOPPED -15' ABOVE THE <br />SURVEYED ENTRY, <br />SJ 40 ' LONG BY B' ID WELDED FLUSH JOINT CASING WILL BEINSTALLED <br />AND GROUTED IN PLACE TO APPROX. IT ABOVE THE SURVEYED ENTRY. <br />6.) THE MITE WILL BE EVACUATED AND REMAIN EVACUATED UNTIL DRILLING <br />IS COMPLETED INTO THE SURVEYED ENTRY. <br />"DRILL STEEL (DRILLING -REAMING PHASE) <br />WIPER/SEAL AROUND DRILL STEEL OR CASING <br />COMPRESSED AIR IN <br />VALVE ON INTAKE AIRLINE <br />STOP DRILLING & REAMING -15 FEET ABOVE MINE <br />USING A NOMINAL 11 INCH FINAL REAM OUT BIT SIZE <br />P:U,A m da 010hicWwr Undo flaw WM TUF , <br />MINE ROOF <br />C A L A <br />4 WAY INTERSECTION SV SUBMAINS <br />SEALED VADGE SEAM WORKINGS <br />C A L A <br />P:U,A m da 010hicWwr Undo flaw WM TUF , <br />