Study On The Selection And Engineering Practice Of Equipment In Fully Mechanized Caving And Large Mining Height Face

The paper utilizes theoretical analysis, numerical simulation and field measurement research methods to carry out the work of equipment selection and engineering practice of fully mechanized caving face on the basis of2301working face in Xin julong coal mine, which have determined the height of coal cutting and provided the basis for the choice to support construction and stent parameters. The paper also have analyzed the principle of "machine" supporting selection and the stand-alone selection, respectively, based on the production and equipment selection requirements and the principle of selection of the Face Select and determined the model of the "machine". By field measurement of hydraulic support adaptability and the main process of matching and measured Shearer downtime caused by face type of major equipment failure. The paper also analysis the Face System reliability and the reliability of the "three machines", and offered direction to optimized and improved by field measurement equipment failure. Based on the selected Hydraulic support, coal winning machine and scraper conveyor, it has determined the sort of process to limit the production capacity of the face, and verified that the equipment failure rate reduction can effectively improve the yield of the face by simulation test. Optimization improved equipment applicants in the1302N of fully mechanized caving face, and have achieved good results. The research have achieved following results:(1) Comprehensive study of different mining height face coal wall and the top coal distribution pattern of the stress field, displacement field, the plastic field, in order to determine the face coal cutting height of4m, choose to provide the basis for the frame type hydraulic support.(2)2301of fully mechanized caving face geological conditions and design requirements, in accordance with the principles and requirements of the "three machine selection, through theoretical analysis and numerical simulation test selected ZF15000-23/43is four-link ZFG15000-26/43H four-poster supporting a shield low level caving hydraulic support KSW-1500EU type electric traction shearer SGZ1000/2×1200and SGZ1200/2×1200conveyor.(3) The paper proposed face each reduce the system failure rate of10%, to face production will increase by3%to5%, effective production systems0.812. (4) Specific optimizations to improve the shearers, hydraulic support and, after the scraper conveyor, making the equipment taken in the course of good results, for equipment failure rate decreased by70%, increased production of10000t/m.The research paper, put a face "Three Machines" matching selection of fully mechanized and provide the basis to achieve a face safe and efficient annual production capacity of ten million tons mined, significant economic benefits, and has broad application prospects.