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Report 001 Appin Area 7 LW705 to 710 SMP Volume 1 Rev 0

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Report 001 Appin Area 7 LW705 to 710 SMP Volume 1 Rev 0 Appin Area 7 Longwalls 705 to 710 Subsidence Management Plan Application for BHP Billiton Illawarra Coal – Written Report 4. SITE CONDITIONS (SMP GUIDELINES section 6.4) 4.1. GEOMORPHOLOGY AND SOILS 4.1.1. Geomorphology The study area is situated south of Sydney and is within the southern part of the Sydney Basin. The surface geology of the SMP Area is dominated by Wianamatta Shale and Hawkesbury Sandstone, with small isolated areas of quaternary soils. The surface of the land within the SMP Area varies from gently undulating to hilly refer Figure 4.1. 4.1.2. Soil Landscapes Near-surface geology of the SMP Area is dominated by weathered Wianamatta Shale outcrop, with Hawkesbury Sandstone occurring as outcropping in gullies and river valleys. The soil landscapes of the area have been mapped by Hazelton and Tille (1990) at a scale of 1:100,000. They identified three main soil types in the area: · Blacktown; described as a residual soil landscape occurring on gently undulating landscape on Wianamatta Group Shale · Hawkesbury; described as a colluvial soil landscape occurring on rugged, rolling to very steep hills on Hawkesbury Sandstone · Luddenham; described as an erosional soil landscape occurring on undulating to rolling hills on Wianamatta Shale, often associated with Minchinbury Sandstone. Refer Appendix A for a figure of surface geology. 4.2. COVER DEPTHS The depth of cover to the Bulli Seam within the general SMP Area varies between a minimum of 440 metres, in the base of the Nepean River valley, and a maximum of 620 metres, near the western end of Longwall 708. The depth of cover directly above the proposed longwalls varies between 470 metres, at the eastern end of Longwall 707, to 620 metres, near the western end of Longwall 708. For figures relating to depth of cover refer Appendix A. 4.3. OVERBURDEN STRATIGRAPHY Appin Colliery lies in the southern part of the Permo-Triassic Sydney Basin, within which the main coal bearing sequence is the Illawarra Coal Measures, of Late Permian age. The Illawarra Coal Measures contain a number of workable seams throughout the area, the uppermost of which is the Bulli Seam (refer Figure 4.2). Cardno FR Reference: 108084-01/Report 001 Volume 1 Rev 0 28 June 2008 Page 12 2 2 2 2 2 9 9 9 9 9 3 2 4 0 K 1 E 0 0 0 0 E 0 0 0 0 0 1 1 R 0 9 6 1 9 8 6 2 8 0 2 1 6 0 6 2 4 4 4 2 8 9 2 0 0 2 8 9 8 0 0 0 0 4 0 0 6 06 0 1 0 0 4 88 98 9 C 0 0 0 9 1 0 9 9 8 0 68 1 1 4 2 2 2 4 1 1 1 1 1 1 1 2 1 1 2 0 8 1 2 1 1 2 1 1 1 W 1 4 1 6 0 0 8 4 2 O 1 1 82 6 1 9 1 L 1 0 S 0 1 9 9 0 4 1 4 8 N 0 9 0 1 8 O 8 1 1 0 122 T 0 4 O 8 8 0 1 06 1 128 1 1 1 2 4 1 4 O 2 1 0 2 0 9 1 1 0 F 1 9 1 2 08 6 220 000 8 4 6 1 4 0 1 9 1 0 0 1 1 1 2 ILLAWARRA COAL 2 1 8 11 0 2 2 8 0 0 1 1 1 08 6 4 1 0 9 1 1 6 6 6 13 10 9 1 0 1 96 6 APPIN COLLIERY 1 1 0 9 6 1 2 8 4 3 8 1 1 1 98 1 1 N 4 EPE 0 AN C SURFACE LEVEL CONTOURS 144 120 6 REEK 1 92 4 2 1 0 2 0 1 1 1 6 2 2 1 9 1 2 1 3 2 2 1 4 0 2 0 4 24 4 9 4 1 9 6 2 1 0 0 Rev No 2 DATE: 1 SCALE: 1 2 8 1 0 1 0 9 1 3 1 6 Figure 4.1 1 6 6 6 1 2 2 6 R0 8 0 2 1 20 June 2008 2 8 6 1 1:30000 1 3 4 1 1 8 1 1 9 4 1 0 2 2 2 2 1 2 3 6 2 2 1 1 2 7 1 8 8 8 2 2 1 1 0 0 2 1 1 1 6 3 3 8 9 7 1 4 0 R 132 11 2 0 1 1 6 6 4 0 6 8 1 8 6 3 2 E 8 2 1 36 1 2 8 1 0 0 3 0 0 0 9 2 4 1 1 V 3 A 8 7 1 4I 0 0 0 1 1 7 E R 6 08 0 0 8 0 0 7 4 1 1 R 4 1 0 3 2 2 6 N 4 2 8 1 A 2 1 6 219 000 0 1L 1 A 4 8 1 128 0 1 2 2 4 E6 1 0 7 1 P E 8 4 A 0 1 1 P 2 2 6 4 F M 2 4 0 2 2 E S 1 0 7 1 1 6 S 1 2 N G 1 1 2 1 3 1 1 2 L 6 6 1 U 0 6 3 3 3 1 1 2 L A 1 6 1 0 1 1 L 9 1 1 Y 8 R 150 1 0 2 18 4 2 4 8 3 0 6 1 2 E 2 3 8 1 8 1 3 1 9 142 2 8 1 4 8 1 3 1 1 N 3 3 8 6 1 20 0 34 4 1 1 2 1 2 1 E 2 4 1 1 1 1 1 1 1 1 3 1 0 1 1 2 6 8 1 3 3 6 G 1 6 1 1 1 4 4 0 1 4 1 1 1 4 2 3 8 1 01 102 2 52 8 6 6 3 2 9 1 2 1 1 8 4 1 1 2 8 4 1 5 1 1 1 9 1 2 7 0 6 1 3 8 3 2 1 1 4 2 1 1 2 1 W 0 8 1 8 1 1 5 1 4 0 L 6 2 4 1 6 6 2 4 2 4 0 4 4 6 2 1 1 5 1 0 1 2 1 4 6 1 1 0 4 8 8 1 4 1 9 4 1 1 1 0 2 2 1 0 9 6 1 1 1 1 0 8 4 0 2 1 2 0 1 0 2 1 0 0 6 6 1 1 1162 4 9 1 62 6 5 1 1 0 6 1 5 4 7 1 1 4 16 8 1 8 6 5 0 4 10 1 W 4 8 6 1 1 1 1 1 2 8 4 5 4 L 1 1 4 8 1 4 1 2 1 1 8 3 4 1 2 5 2 4 1 2 1 1 2 1 42 8 3 5 1 140 0 1 14 0 1 0 1 9 2 6 2 1 132 2 2 30 1 2 6 218 000 0 134 1 6 6 60 1 2 8 4 1 3 1 0 0 NA 7 8 1 VIGAT 20 ION CR W EEK 1 2 1 1 L 0 146 24 34 6 5 1 0 1 1 1 1 0 0 7 34 2 5 1 3 1 1 2 4 4 0 2 8 4 8 4 4 1 1 2 6 4 1 1 3 8 6 1 1 5 1 4 9 1 4 3 3 8 1 5 2 4 1 6 6 1 52 2 2 1 8 6 1 5 4 8 3 0 1 1 0 4 174 4 4 0 1 1 2 1 8 1 1 6 5 2 1 1 3 2 3 4 3 30 6 6 1 1 L 1 2 8 1 1 5 4 6 0 7 3 W 4 4 3 3 5 4 1 1 1 0 1 0 1 1 9 5 1 72 4 1 1 8 4 4 28 26 3 3 3 0 6 1 1 2 6 162 8 W 0 1 8 3 4 4 3 2 1 1 4 1 1 1 1 6 L 1 6 6 3 1 1 3 4 6 5 5 3 6 1 2 3 4 0 6 1 4 2 0 K 5 0 4 0 2 EE 1 1 1 8 6 4 1 R 4 46 C 7 3 8 2 1 1 Y 4 1 2 1 1 8 AT 8 1 7 LL 6 2 A 6 8 1 6 30 M 2 7 1 4 1 6 6 1 4 0 4 1 8 1 0 5 5 6 2 5 4 2 2 11 7 6 1 6 1 5 4 6 1 1 1 1 8 2 6 4 0 8 4 1 2 7 0 1 4 1 0 7 0 1 5 6 0 1 L 8 7 1 8 2 0 1 56 1 4 1 6 4 2 W 1 7 W 4 8 2 6 1 8 1 2 2 1 5 L 1 1 7 1 8 2 3 168 8 1 1 6 0 1 2 6 6 4 1 6 1 110 3 0 1 0 2 0 7 1 0 0 2 102 8 7 4 6 28 1 9 10 8 2 8 2 1 1 1 1 10 8 0 6 4 1 2 1 0 1 5 0 0 10 2012 8 0 50 1 4 4 9 2 6 1 1 8 9 6 217 000 7 9 0 4 1 9 1 4 5 4 16 1 4 52 2 1 1 0 2 1 1 0 2 60 1 92 0 16 7 1 94 0 2 L 7 156 W 1 0 2 17 W 0 4 6 6 L 2 6 12 2 1 1 4 196 1 3 3 9 1 1 1 1 8 1 6 6 7 9 2 0 1 4 6 9 8 2 1 6 1 9 1 1 1 4 2 1 6 5 4 9 3 4 6 1 1 6 8 1 5 1 1 1 1 8 4 9 7 17 6 2 18 0 1 1 0 4 6 9 1 1 2 0 1 8 6 8 8 4 162 0 1 4 0 1 6 1 0 5 3 3 7 4 6 6 3 6 2 1 1 1 4 4 2 1 4 2 1 1 6 72 66 1 W 1 2 8 1 4 28 4 146 17 2 L 1 O 1 4 1 L 54 3 U 1 0 W 6 S 2 2 2 6 0 3 6 8 5 0 9 6 E 4 3 1 7 1 1 8 1 8 1 4 1 140 4 1 D 58 1 3 1 1 1 1 9 A 9 2 0 0 7 1 0 L 6 1 1 4 1 8 E 3 1 3 2 8 3 1 6 0 1 8 8 5 2 1 5 2 0 2 3 1 4 5 6 1 5 C 3 3 0 1 215 7 1 1 5 6 2 4 1 K 4 1 1 3 4 3 6 1 4 W 0 1 8 1 44 3 L 122 2 1 0 6 4 5 1 1 1 19 3 42 3 4 1 0 1 2 1 134 136 0 1 0 3 2 08 6 216 000 8 2 4 1 0 1 1 8 4 6 1 8 6 1 0 1 7 1 6 1 4 1 5 8 8 2 W 3 1 1 2 1 L 6 2 1 0 64 1 6 6 2 4 2 3 1 0 1 1 6 6 1 1 1 3 2 28 K 6 1 0 2 E 1 2 2 6 1 3 2 E 1 11 4 8 1 8 1 R 4 4 0 1 1 42 4 1 2 108 0 2 2 1 1 1 C 1 8 0 2 9 0 1 2 1 2 3 1 4 1 0 1 124 6 0 1 0 6 1 S 1 8 1 0 1 1 3 4 1 4 I 4 1 6 2 4 4 4 9 1 6 2 1 1 2 4 3 6 0 1 4 0 6 8 7 2 1 1 2 1 8 6 12 8 2 1 0 2 0 1 3 1 R 0 1 1 1 2 1 9 1 4 8 1 1 1 4 6 7 7 1 6 76 1 1 4 0 R 1 1 1 6 4 0 4 8 8 0 6 1 5 62 68 0 8 0 9 1 A 2 H 1 LW 11 LW L W LW 0 SURFACE LEVEL CONTOURS ARE IN m AHD 7 2 1 01 0 LW Appin Area 7 Longwalls 705 to 710 Subsidence Management Plan Application for BHP Billiton Illawarra Coal – Written Report The Illawarra Coal Measures are overlain by sandstone, shales and mudstones of the Narrabeen Group, which are in turn, overlain by Hawkesbury Sandstone.
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    BIBLIOGRAPHY Adachi, T., Ogawa, T., and Hayashi, M. (1981) Mechanical properties of soft rock and rock mass, Proc. 10th ICSMFE, vol. 1, pp. 527-530. A.G.I. (1977) Some Italian Experience on the Mechanical Characterization of Structurally-Complex Formations, Proc. Int. Symp. Geot. Struct. Complex Form., Capri, vol.1, pp. 1-20. Al-Bazali, T.M. (2003) Membrane efficient behaviour of shale, M.Sc. Eng., University of Texas, Austin. Al-Mhaidib, A.I. (1999) Swelling behaviour of expansive shales from the middle region of Saudi Arabia, Geotechnical and Geological Engineering, No. 16, pp. 291-307. American Society for Testing and Materials (1971) Procedures for uniaxial compressive strength tests, ASTM D2938. American Society for Testing and Materials (1996) Standard test method for direct shear test of soils under consolidated drained conditions, D3090-90, Annual Book of ASTM Standard. AS 1289 (1994) Methods of testing soil for engineering purposes, Method 3.6.3: Standard Method of Fine Analysis Using a Hydrometer. AS 1289 (1995) Methods of testing soil for engineering purposes, Method 3.2.1: Soil Classification Tests-Determination of the Plastic Limit of a Soil-Standard Method. AS 1289 (1995) Methods of testing soil for engineering purposes, Method 3.2.1: Soil Classification Tests-Determination of the Liquid Limit of a Soil-Four Point Casagrande Method. AS 1289.D1.1 (1977) Methods of testing soil for engineering purposes, Determination of the Organic Matter Content of a Soil, Standard Method. A.G.I. (1979) Some Italian Experience on the Mechanical Characterization of Structurally-Complex Formations, Proc. 4th Int. Conf. Int. Soc.
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