Sch 19Principal mining hazard management plans—additional matters to be considered

Schedule 19—Principal mining hazard management plans—additional matters to be considered Regulation 628 1—Ground or strata instability The following matters must be considered in developing the control measures to manage the risks of ground or strata instability: (a) the local geological structure; (b) the local hydrogeological environment, including surface and ground water; (c) the geotechnical characteristics of the rocks and soil, including the effects of time, oxidation and water on rock support and stability; (d) any natural or induced seismic activity; (e) the location and loadings from existing or proposed mine infrastructure such as waste dumps, tailings storage, haul roads and mine facilities; (f) any previously excavated or abandoned workings; (g) the proposed and existing mining operations, including the nature and number of excavations, the number and size of permanent or temporary voids or openings, backfilling of mined areas and stopes, abutments, periodic weighting and windblast; (h) the proposed blasting activities, including airblast. 2—Inundation and inrush The following matters must be considered in developing the control measures to manage the risks of inundation and inrush: (a) the potential sources of inundation, including extreme weather, overflow or failure of levies and dam structures, failure or blocking of flow channels (either regular, overflow or emergency); (b) the potential sources of inrush including current, disused or abandoned mine workings along the same seam or across strata, surface water bodies, backfill operations, highly permeable aquifers, bore-holes, faults or other geological weaknesses; (c) the potential for the accumulation of water, gas or other substances or materials that could liquefy or flow into other workings or locations; (d) the magnitude of all potential sources and maximum flow rates; (e) the worst possible health and safety consequences of each potential source, including the accuracy of plans of other workings, variation in rock properties and geological weaknesses. 3—Mine shafts and winding operations The following matters must be considered in developing the control measures to manage the risks associated with mine shafts and winding operations: (a) the stability and integrity of the shaft; (b) the potential for fires in underground operations, the shaft or winder areas; (c) the potential for any unintended or uncontrolled movement of the conveyances within the shaft; (d) the potential for a detached conveyance to fall down the shaft; (e) the potential for fall of persons, equipment, materials or support structure into or within, the shaft; (f) the potential for failure of, or damage to, health and safety related equipment and controls, including the following: (i) ropes bearing the weight of the shaft conveyance; (ii) controls and limiting devices to prevent overwind, overrun, overspeed and the exceeding of other selected limits; (iii) equipment and controls to detect, prevent or cause the winder to stop in the event of slack rope, drum slip or tail rope malfunctions; (iv) braking systems including emergency brakes and systems for preventing free‑fall of a conveyance; (v) warning systems for any emergency in the shaft; (vi) communication systems; (g) the potential for injury to persons in a conveyance from material being carried in the conveyance or falling from another conveyance; (h) the need to enable persons to escape from a stalled conveyance; (i) the competency of the operator of the winder. 4—Roads and other vehicle operating areas The following matters must be considered in developing the control measures to manage the risks associated with roads and other vehicle operating areas: (a) mobile plant characteristics, including stopping distances, manoeuvrability, operating speeds, driver position, driver line of sight and remote control mobile plant; (b) the effect on road conditions of expected environmental conditions during operating periods (including time of day, weather, temperature and visibility); (c) the impact of road design and characteristics, including grade, camber, surface, radius of curves and intersections; (d) the impact of mine design, including banks and steep drops adjacent to vehicle operating areas; (e) the volume and speed of traffic and the potential for interactions between mobile plant with different operating characteristics, including heavy and light vehicles; (f) the potential for interactions between mobile plant and pedestrians, including consideration of park up areas and driver access; (g) the potential for interaction between mining mobile plant and public traffic; (h) the potential for interaction between mobile plant and fixed structures, including overhead and underground power lines, tunnel walls and roofs. 5—Air quality, dust and other airborne contaminants The following matters must be considered in developing the control measures to manage the risks associated with air quality, airborne dust and other airborne contaminants: (a) the types of dust and other chemical and biological contaminants likely to be in the air from both natural sources, including naturally occurring asbestos, and introduced sources; (b) the levels of oxygen, dust and other contaminants in the natural or supplied air of a mine; (c) the temperature and humidity of the air; (d) the length of exposure, having regard to extended shifts and reduced recovery periods. 6—Fire and explosion The following matters must be considered in developing the control measures to manage the risks of fire and explosion: (a) the potential sources of flammable, combustible and explosive substances and materials, both natural and introduced, including gas, dust, fuels, solvents and timber; (b) the potential sources of ignition, fire or explosion, including plant, electricity, static electricity, spontaneous combustion, lightning, hot work and other work practices; (c) the potential for propagation of fire or explosion to other parts of the mine. 7—Gas outbursts The following matters must be considered in developing the control measures to manage the risks of gas outbursts: (a) the potential for gas release into the working area of a mine from both natural and introduced sources in a concentration that could lead to fire, explosion or asphyxiation; (b) the potential for accumulation of gases in working areas and abandoned areas of the mine; (c) the nature of the gas that could be released; (d) the gas levels in the material being mined; (e) gas seam pressures. 8—Spontaneous combustion The following matters must be considered in developing the control measures to manage the risks of spontaneous combustion: (a) the potential for spontaneous combustion to occur in the material being mined, including by— (i) evaluating the history of the mine in relation to spontaneous combustion; and (ii) evaluating any adjacent or previous mining operations in the same seam; and (iii) the conduct of scientific testing; (b) mine ventilation practices; (c) the design of the mine; (d) the impact of gases generated by spontaneous combustion on mine environmental conditions.