The Key Techniques Study Of Mining Area Transition In Surface Coal Mine Employed Dragline Mining Technology

Dragline no transport process is inverted stack Central Purchasing, transport,ranked as one of the mining process, because there is no transport links, it iscompared with other open-pit mining techniques, with a low stripping costs, highlabor efficiency a significant advantage for nearly horizontal or gently inclined seams,peel the physical and mechanical properties of materials and climatic conditions, nostrict requirements. No transport large dragline down stack technology hassuccessfully applied Heidaigou surface mine, the mine is currently mining area fromthe first turn to the transition to the second mining area, but no domestic draglineexcavator casting process conditions Opencast mining area turned to experiencedragline excavator casting process strictly limited by the operating space and miningparameters and to develop the transport system in the mining area under this conditionsignificantly different from the single bucket steering-Truck intermittent process,the need for appropriate basic theory and common key technologies in-depth study.Under thesis dragline excavator casting process with a comprehensive miningprocess conditions Opencast mining area turned the key technical problemsencountered, the basic way Opencast mining area were turned from this condition,the movement law stream mining area during the shift several aspects of the projectmining area coupling law stripping the reliability of each single shift during themining process among other in-depth study reached the following conclusions:(1) based on the fundamental shift in the way the mining area proposed draglineno reasonable means of transport down the heap mining area turned under processconditions, analyzes the influencing factors, and to establish a mining areacorresponding shift mode selection evaluation system, reveals no transportationdragline mining area turned down heap process evolution.(2) study the migration law stripping material during mining area steering,steering through the analysis of the imbalance in the front and rear dump spacetransportation system optimization to develop and reveal its evolution, particularlycoal transport channel optimization settings. According to the release conditionswithin row space, revealing the final height of the row, coupling between the flow ofmaterials and stripping works to maximize the use of the open-pit dump, reducingefflux stripping material discharge area and shorten the transportation distanceabandoned. (3) In order to ensure the continuation of normal production, using the conceptof reliability theory to define stripping engineering reliability, established to mobilizeequipment and operating principles of location determination methods.(4) According to the process of limiting and non-limiting characteristics,research mining area turned to adjust to match each other during and between thesingle process parameters to achieve a period of dragline excavator casting processturned down heap of a dynamic step height adjustment.According to statistics, China’s development has been or will be suitable forlarge-scale open-pit mining, coal mining area in the large majority of seam dip is lessthan10°, is nearly horizontal or gently inclined coal, coal seam simple structure;which a considerable part of the coal seam dip is less than5°, nearly horizontal coal.Therefore, China is developing and planning the development of a number of largeopen-pit mine dragline applications all have the basic conditions withouttransportation pour heap process.Contents of this paper and the main results will dragline process provides freetransportation down heap basic theory and the corresponding common key technicalsupport in the promotion and application of surface mine.