Author:
GAO Deng-yun
Author Unit:
Production Management Department, Shenhua Shendong Coal Group Corporation Limited
Key Words:
roof control; 7m high cutting; the run-through of terminal mining; roof fall;
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In order to prevent the hydraulic powered support jammed and roof fall accident during terminal mining of fully- mechanized coal face with 7 m high cutti
ng height, based on the experiences and roof control technology of first fully- mechanized coal face with 7 m high cutting height in Daliuta Coal Mine, the paper researc
hed the roof control technology during terminal mining of second fully- mechanized coal face with 7 m high cutting height. The analysis showed that the roof hanging dis
tance too long, the position of wire mesh unreasonable, the hanging wire mesh time too long and Lower bracket supporting performance were the main reasons of roof
control difficulty during terminal mining in coal mining face. The preventive measures of strengthening mineral pressure observation, strengthening coal by pre-grouting
marithan, determining the position of wire mesh reasonable, improving supporting performance and shortening the hanging wire mesh time were used to solve the probl
em of roof control difficult, hydraulic powered support jammed and roof fall during terminal mining of fully- mechanized coal face with 7 m high cutting height, to ensure
fully- mechanized coal face with 7 m high cutting height through terminal mining safety.
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