Tahmoor Coal Pty Ltd COAL RESOURCE RECOVERY PLAN Tahmoor North Western Domain Longwalls West 1 and West 2 July 2019 simecgfg.com This page has been left blank intentionally. 2 | Tahmoor North Western Domain LW W1-W2 – Coal Resource Recovery Plan TAH-HSEC-243 (July 2019 Ver1) This page has been left blank intentionally. 4 | Tahmoor North Western Domain LW W1-W2 – Coal Resource Recovery Plan TAH-HSEC-243 (July 2019 Ver1) Table of Contents Table of Contents ....................................................................................................................... 5 List of Figures ............................................................................................................................. 7 List of Tables .............................................................................................................................. 7 1 Introduction ........................................................................................................................ 9 Background ............................................................................................................................... 9 Purpose ..................................................................................................................................... 9 Scope ......................................................................................................................................... 9 2 Regulatory Requirements .................................................................................................. 13 Project Approval...................................................................................................................... 13 2.1.1 Development Consent ................................................................................................. 13 2.1.2 Extraction Plan Guideline ............................................................................................. 14 Relevant Legislation ................................................................................................................ 15 2.2.1 Mining Act 1992 ........................................................................................................... 15 2.2.2 State Environmental Planning Policy (Mining, Petroleum Production and Extractive Industries) 2007 .......................................................................................................................... 15 2.2.3 Mining Lease Condition................................................................................................ 16 Consultation ............................................................................................................................ 17 2.3.1 Consultation with Division of Resources and Geosciences ......................................... 17 3 Geology ............................................................................................................................. 18 Regional Geology .................................................................................................................... 18 3.1.1 Sydney Basin ................................................................................................................ 18 3.1.2 Southern Coalfield........................................................................................................ 18 Local Geology .......................................................................................................................... 21 3.2.1 Wianamatta Group ...................................................................................................... 21 3.2.2 Hawkesbury Sandstone ................................................................................................ 21 3.2.3 Narrabeen Group ......................................................................................................... 23 3.2.4 Illawarra Coal Measures ............................................................................................... 23 Coal Resource .......................................................................................................................... 23 3.3.1 Coals Seams .................................................................................................................. 23 3.3.2 Bulli Coal Seam ............................................................................................................. 23 Overburden Stratigraphy ........................................................................................................ 26 Structural Geology .................................................................................................................. 27 3.5.1 Sydney Basin ................................................................................................................ 27 5 | Tahmoor North Western Domain LW W1-W2 – Coal Resource Recovery Plan TAH-HSEC-243 (July 2019 Ver1) 3.5.2 Southern Coalfields ...................................................................................................... 29 4 Mine Geotechnical Overview ............................................................................................. 31 Depth of Cover ........................................................................................................................ 31 Roof Stata Characteristics ....................................................................................................... 31 Floor Strata Characteristics ..................................................................................................... 31 Seam Dip ................................................................................................................................. 31 Seam Thickness and Working Section..................................................................................... 32 Faulting .................................................................................................................................... 32 Igneous Intrusions ................................................................................................................... 32 Seam Splitting ......................................................................................................................... 33 Geotechnical Design Parameters ............................................................................................ 33 Stability of Underground Workings ........................................................................................ 33 5 Coal Quality ...................................................................................................................... 34 6 Mine Subsidence ............................................................................................................... 35 7 Mining System .................................................................................................................. 36 Mining Method ....................................................................................................................... 36 Mine Design ............................................................................................................................ 37 Mining Geometry .................................................................................................................... 39 Mining Hazards ....................................................................................................................... 40 8 Resource Recovery ............................................................................................................ 41 Reserves .................................................................................................................................. 41 Mining Schedule ...................................................................................................................... 41 Future Mining Proposed ......................................................................................................... 42 9 Justification Statement ...................................................................................................... 44 10 Review and Improvement .............................................................................................. 45 Reporting Requirements ......................................................................................................... 45 Review and Auditing ............................................................................................................... 45 Roles and Responsibilities ....................................................................................................... 45 11 Document Information................................................................................................... 46 References............................................................................................................................... 46 Glossary of Terms .................................................................................................................... 46 Abbreviations .......................................................................................................................... 46 Change Information ................................................................................................................ 47 6 | Tahmoor North Western Domain LW W1-W2 – Coal Resource Recovery Plan TAH-HSEC-243 (July 2019 Ver1) List of Figures Figure 1-1 Regional Context ................................................................................................