Laserfiche WebLink
As shown on Figure 2a, the initial drilling plan was • <br />designed to be offset from the three entries of Second Right <br />Section and in advance of the fault. This would help define both <br />elevation and lithological differences within the workings.. Upon <br />completion of the first well (GE 26-88) no significant channel <br />sandstone was found in the roof nor in contact with the P[axwell <br />coal bed. However, a single fracture zone yielding significant <br />gas and water inflow was encountered which occurred in a tabular <br />fine grained grey sandstone approximately 5 feet above the mine <br />seam. A rock sample from the fault face in the workings was <br />retrieved and verified with identical cuttings from the surface <br />drill hole. The drill plan proceeded to a similar offset 100 <br />feet North of First Right Section which is 600 feet to the south <br />of Second Right Section. Faulting could not be interpreted but <br />intense fracturing with apreciable upward water inflow and some <br />gas was present in two of the holes (GE 31-88 & GE 34-88). <br />Several additional holes were drilled (GE 27, GE 28, GE 30, GE <br />31 & GE 34) along a profile at 100-200 foot spacings north of • <br />First Right to establish elevation control. A structure downwarp <br />to the east, similar to a monocline, was interpreted. The coal <br />bed and strata appear to plunge 8 percent east over a distance <br />of 400 feet across the suspected fractured zone. <br />A single well (GE 29-88) was drilled 575 feet south o:E <br />the above profile (about 250 feet south of #3 entry, First. Right <br />Section) and it too encountered appreciable water inflow in a <br />fracture zone above the Maxwell seam. Deeper drilling into the <br />Apache seam encountered a second fracture that diverted all <br />inflowing water down the well. One conclusion drawn from this <br />observation was the frequency of fracture intercepts for drill <br />holes within the fracture zone and the ease at which water flows <br />through the fractured structure. The location of this well <br />implies that the vertically fractured zone may extend North-South <br />at least 1400 feet (distance between GE 26 & GE 29). The lowest <br />~- <br />2.04-6(d) (Revised 09/01/89) <br />