PERMFILE130891

• Permit No: C1984065A
• IBM Index Class Name: Permit File
• Doc Date: 4/26/2007
• Section_Exhibit Name: 4.3 Operation Plan - Permit Area
• Media Type: D
• Archive: Yes

waste rock underground. Underground disposal is proposed as a
means to improve the already good quality coal, rather than to .
provide the solution to a disposal problem. This section describes
such a plan.
Mine waste, commonly referred to as refuse, is sometimes a by-
product of coal production, depending upon the nature of the seam
and adjacent rock. The disposal of this mate r.i.al has been and
continues to be a problem confronting the coal industry. As demand
for coal increases and the existing trend for more regulatory and
environmental constraints continues, an economical and satisfactory
solution to the waste disposal problem is needed. One solution is
to return it underground.
Backfilling methods have been utilized
subsidence in special circumstances and
especially in vertical deposits. Four
generally used:
o gravity stowing
o mechanical stowing
o pneumatic stowing
o hydraulic stowing
in coal mines to reduce
in multiple-seam mining,
backfilling methods are
The earliest method of stowing was by gravity Flow; the simplest
way of backfilling when mining steeply pitching seams. Hydraulic
disposal is the most widely practiced in mining steeply dipping
deposits such as are found in NCIG's project. waste material can
be hydraulically transported long distances either by gravity or,
as proposed by NCIG, by pumping.
4.3.6.1 Generation of Refuse Material
NCIG will develop a very limited amount
mining refuse material as a part of its
amount of refuse will be generated as a
NCIG - Coal Ridge #1 4-46
of coal processing and
operations. A minimal
result ct the mining
ABC/1145/910509
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