Study on strata behavior law of fully-mechanized mining face with 8 m large mining height
ZHANG Lihui
LI Nannan
Abstract：According to the fully-mechanized mining face with large mining height when the mine pressure appear more intense,prone to coal wall,roof pressure frame and other accidents,taking Shandong Mining Area first 8 meters fully-mechanized mining face as the research object,the numerical simulation analysis showed that the peak value of abutment pressure in fully-mechanized mining face coal wall around 6～9 meters,the peak pressure in the coal lane to help the wall around 6 meters,based on the field observation and data analysis of the support pressure of mining face of mine pressure were studied.The results showed that with the mining height were broken up,help phenomenon aggravate,the first pressure step of the work mining face away from 40 to 44 meters,continuous pressure for 5 knives,periodic weighting distance was 7.5 ～ 16.8 meters and an average of 10.77 meters,continuous pressure for 2 ～ 8 knives and an average of 4.8 knives,roughly the present big-small irregular change trend,dynamic load coefficient was 1.36 ～ 1.74,the compressive strength was stronger,compared with 7 meters mine pressure behavior obvious,weighting was reduced,compressive strength was increased,support resistance met the supporting conditions of surplus to a certain extent,this would provide a scientific basis for safety mining of the next large mining height work face.
Keywords：large mining height fully-mechanized working faceShendong Mining Areastrata behaviorfull seam one passing mining
Publication Date：2017-01-01