Cause Analysis and Prevention Technology of Roof Cutting Powered Support Jammed Occurred in Fully-Mechanized Top Coal Caving Mining Face
CHEN Bing
Abstract：In order to solve serious mine strata pressure behavior and roof cutting powered support jammed accident frequently occurred in the fully-mechanized top coal caving mining face in Tiebei Mine,the site observation and theoretical analysis showed that special roof con-dition and poor powered support performances were the major factors to cause the roof cutting powered support jammed accident.The KJ21 mode roof disaster monitoring and measuring early warning system was applied to the monitoring and analysis on powered support initial support force,a circulation end resistance,safety valve opening,periodical roof weighting distance,powered support no pressure keeping, powered support unbalanced and other key indexes.With a mathematical statistics and analogy method applied to the analysis on the moni-tored and measured data,five major factors to cause the roof cutting powered support jammed accident were obtained and thus the measures to prevent and control the roof cutting powered support jammed accident occurred in the coal mining face were put forward.The results showed that the monitoring and analysis conducted on the powered support performances of the coal mining face would be favorable to pre-vent and control the roof cutting powered support jammed accident occurred and could make the month production of the coal mining face increased from 170 000 t to over 250 000 t.
Keywords：fully-mechanized top coal caving mining facemine strata pressure behaviormonitoring and measuring of powered support performancesroof cutting powered support jammed
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 83-86,145 )