DOI: 10.11799/ce201711001
Development and application of complete equipment for fully mechanized mining with 8.2m super-large mining height
WANG Guo-fa
PANG Yi-hui
Abstract：Aiming at the problems of fully-mechanized mining technology and equipment for 6 ～ 8m coal seam,the "cantilever-voussoir beam" and "tension fracture-slippage" mechanical model were established to study the roof strata fracture structure and rib spalling mechanism based on the coal seam condition in Jinjitan Coal Mine.The fully-mechanized mining equipment with 8.2m mining height were developed,which achieved safe,efficient and high-recovery mining with for working face with 8.2m mining height in Jinjintan Coal Mine.The result showed that,the dynamic load from roof stratum to hydraulic support was obtained through the coupling dynamics model of hydraulic support and surrounding rock.The damage depth of rib was positively correlated with mining height and mining pressure,while negatively correlated with coal strength.The adaptability of hydraulic support to surrounding rock was improved through developing the impact resistant double telescopic upright post,three-level entrainment support device and so on.The problem of instant volume coal,coal quantity change and rib spalling coal were solved by developing the scraper conveyer with frequency control and large capacity.The complete set of fully-mechanized mining equipment was developed.The end coal loss problem was solved by adopting the "large gradient + small steps" mating pattern.The production capacity was 0.57 million tons per day and 1.5 million tons per month in Jinjitan Coal Mine,which achieved safe,efficient and high-recover mining.
Keywords：fully mechanized mining with super-large mining heightsurrounding rock control technologyhydraulic support designscraper conveyer with inverter controlintegrated matching of equipment
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )