To ensure you have the latest version, check the dnrme. To raise the cutting efficiency and percentage of lumps for the auger mining machine, two cutting models the axial cutting and the radial cutting were proposed. The depth, thickness, and configuration of the coal seams determine the mode of extraction. Surface auger mine at rietspruit mine services pty ltd. Study on design of operating mechanism of auger mining machine. Holes are horizontally drilled at regular intervals to depths of as much as 1,000 feet. Classification of surface mining methods together with the desired parameters conditions suitable for their applications. Recognised standards may be updated from time to time. The journal of the south african institute of mining and metallurgy march 2002 119. Data concerning the performance of modern coal augers under. Analysis of highwall mining stability the effect of multiple.
Highwall auger mining open pit and open cast methods employ a conventional mining cycle of operations to extract minerals. At the time of the accident, the auger mining machine was operating at the no. Serving the global hard rock and soft rock mining sectors. Coal recovery rates approach 60 percent w ith this method. The auger miner has four hydraulic jacks that level the machine at the proper elevation and angle for the coal seam. Recent estimates suggest that upwards of 45 million clean tons. South african coal mining conditions were gained from a proven surface auger which operated. Auger mining, method for recovering coal by boring into a coal seam at the base of strata exposed by excavation. It goes on to describe the research and development programme to develop a prototype underground auger mining system aimed at providing economic extraction of otherwise sterilized reserves. Surface auger mining at rietspruit mine services pty ltd saimm.
Surface auger mining at rietspruit mine services pty ltd. The purpose of the highwall mining system is to extract coal with an auger machine or a continuous miner from exposed seams at the base of open. Auger and highwall mining continues to grow in importance as a coal production method from surface mines. Hardrockvertex drill products outperform and outlast other products, period. Auger mining is usually associ ated with contour strip mining. A method to eliminate explosion hazards in auger highwall mining. Application of highwall mining system to recover residual. The coal auger mining machine is owned and operated by princess polly anna coal, inc. Normally one of the lowestcost techniques of mining, it is limited to horizontal or slightly pitched seams that have been exposed by geologic erosion.
Hardrockvertex mining drill products hardrockvertex. A new underground auger mining system semantic scholar. Currently, there may be up to 60 highwall mining systems and as many as 150 auger mining systems operating in the nations surface coal mines. Some considerations of highwall mining systems in coal mines. In this method of mining, a horizontal auger enters the coal seam from the surface mine bench under the highwall and the coal is literally drilled in a series of. Augering is usually associated with contour stripmining. A method to eliminate explosion hazards in auger highwall. The auger highwall mining method is an effective meth od to recover coal from a reserve when removal of the overburden by surface mining equipment becomes uneco nomical. Coal augering services footage showing auger mining, cutterhead starting a hole, lifting in an auger flight, and showing how the machine walks sideways, to. Pdf study on design of operating mechanism of auger mining.