REP45710

• Permit No: C1981038
• IBM Index Class Name: Report
• Doc Date: 5/4/1994
• Doc Name: 1993 ANNUAL MINE INFLOW REPORT
• Permit Index Doc Type: MINE INFLOW REPORTS
• Media Type: D
• Archive: No

•
1993 ANNIIAL !SINE INFLOW REPORT
Introduction
In compliance with Stipulation No.29, Permit No. C-81-038,
Cyprus Orchard Valley Coal Company submits the following Annual
Mine Inflow Report for the period of July 1, 1992 through June 30,
1993.
Minino Locations and Projections
Extension of the II West Submains had progressed to crosscut
27 by July 1, 1992 and development continued through crosscut 43 by
January 1, 1993. Panel B retreat mining was underway in July 1992
and continued into October. The advance development of Panel C was
initiated in October and was completed by the end of January, 1993.
Retreat mining of floor coal in Panel C extended through April,
1993. Panel Y development was initiated in October 1992 and
extended to crosscut 24 by June 30, 1993. Panel Z development was
initiated in December 1992 and completed through crosscut 7 by June
30, 1993.
Mining projections for the period of July, 1993 through June
1994 include the completion of advance mining Panel Y, the
• completion of advance and retreat mining in panel Z, the initiation
of advance mining in Panel 1st North East.
Mine Inflow
The mine inflow study at the Orchard Valley West Mine was
completed during June, 1993. Advance development of Panels Y and
Z was underway during this time. No measurable inflows were noted
during the mine inflow inspection. Nine locations exhibited minor
seepage from both roof and floor sources, and an additional nine
locations were mapped as having accumulated water in sumps.
Leakage from in-mine water distribution and dust suppression
systems contributed to the water accumulations in at least three of
the sump locations. One location was mapped this year as
exhibiting minor flow associated with a fault within the mine.
This fault, identified as inflow 11, has historically been a source
of inflow into the mine. During the spring of 1993, this fault
source was noted to exhibit an increased flow as compared to
previous years. The inflow at this source does not stem from a
discreet point but instead consists of a series of drips from
different locations in the area. Two sources (inflows 8 and 10)
were noted to exhibit water accumulations in the mine where none
occurred last year. Both were observed to originate from roof
seeps. No measurable flows were occurring at any site during the
• 1993 mine inflow monitoring tour.