Research on the mining pressure law oflarge mining height comprehensive mechanized mining face
In order to ensure the safety and efficient mining of the comprehensive mechanized mining face,taking the 22406 fully mechanized mining face of Bulianta Coal Mine as the research background,a comprehensive mining pressure analysis of the high mining height comprehensive mechanized mining face is conducted through on-site observation,theoretical analysis and data collection.The changes in the mining pressure during the mining period is mainly studied by using the methods of initial pressure,periodic pressure and support resistance.Research has shown that hydraulic pre-fracturing during the initial mining period has a certain effect,and the manifestation of mineral pressure is not significant,the working face is subjected to cyclic compression of varying sizes and is greatly affected by structural stress,near the mining side and the head side,the dynamic load coefficient varies greatly,and the support resistance shows a certain degree of richness,which fully ensuring the backfilling of the working face.
large mining height mechanized mining faceinitial pressureperiodic weightinghydraulic pre-fracturingsupport resistance
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