DOI: 10.11799/ce201612017
Study on influence scope of advance abutment pressure and technology of yield end-mining for fully-mechanized working face in shallow seam
QIN Zhong-cheng
ZHANG Wang-bao
WANG Jiu-li
Abstract：According to the problem in reasonable coal pillar width design and safe retracement of powered support at end-mining of fully-mechanized working face in shallow seam, theory analysis and practice method is adopted to research the coal face of No?23103 working face Zhuanlongwan Coal Mine. The results show that the influence scope of advance abutment pressure at the end of coal face is about 19~20m, the width of stress limit equilibrium zone of protective pillar is 4?86m. According to the results, protective pillar can be 20m between the retracement entries in No?23103 working face, the theoretical yield position is 5m, realizing fast coal face connection and safe retracement of powered support, without stopping at yield position, which is verified through theoretical analysis and practice.
Keywords：shallow coal seamadvance abutment pressureyield end-miningsafe retracement of powered support
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 53-55 )