Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:22:p26
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 22 (pt 26/29)
Character Range: 297664–300307

or
            (b) for a non‑gassy mine—.
T is the number of whole months since the mine became a decommissioned underground coal mine, at the end of the reporting year.
N is:
            (a) if T is less than 12—the value for T; or
 (b) if T is 12 or greater—12.
b is:
 (a) for a gassy mine—‑1.45; or
 (b) for a non‑gassy mine—‑1.01.
C is:
 (a) for a gassy mine—0.024; or
 (b) for a non‑gassy mine—0.088.

3.34  Measurement of proportion of mine that is flooded
  For subsection 3.32(1), Fdm is:

  where:

MWI is the rate of water flow into the mine in cubic metres per year as measured under section 3.35.
MVV is the mine void volume in cubic metres as measured under section 3.36.
months is the number of whole months since the mine became a decommissioned underground coal mine, at the end of the reporting year.

3.35  Water flow into mine
  For MWI in section 3.34, the rate of water flow into the mine must be measured by:
 (a) using water flow rates for the mine estimated in accordance with an appropriate standard; or
 (b) using the following average water flow rates:
 (i) for a mine in the southern coalfield of New South Wales—913 000 cubic metres per year; or
 (ii) for a mine in the Newcastle, Hunter, Western or Gunnedah coalfields in New South Wales—450 000 cubic metres per year; or
 (iii) for a mine in Queensland—74 000 cubic metres per year.
Note: An appropriate standard includes AS 2519—1993 Guide to the technical evaluation of higher rank coal deposits.

3.36  Size of mine void volume
  For MVV in section 3.34, the size of the mine void volume must be measured by:
 (a) using mine void volumes for the mine estimated in accordance with industry practice; or
 (b) dividing the total amount of run‑of‑mine coal extracted from the mine before the mine was decommissioned by 1.425.

3.37  Method 4—decommissioned underground mines
 (1) For paragraph 3.31(2)(b) and subsection 3.31(3), method 4 is the same as method 4 in section 3.6.
 (2) In applying method 4 under section 3.6, a reference to an underground mine is taken to be a reference to a decommissioned underground mine.

Subdivision 3.2.4.3—Fugitive emissions from coal mine waste gas flared

3.38  Method 1—coal mine waste gas flared
 (1) For subparagraph 3.31(4)(a)(i) and paragraphs 3.31(4)(b) and (4)(c), method 1 is the same as method 1 under section 3.14.
 (2) In applying method 1 under section 3.14, a reference to an underground mine is taken to be a reference to a decommissioned underground mine.

3.39  Method 2—coal mine waste gas flared
  For subparagraph 3.31(4)(a)(ii), method 2 is the same as method 2 under section 3.15.

3.40  Method 3—coal