中国煤炭
中國煤炭
중국매탄
CHINA COAL
2014年
4期
49-51
,共3页
大采高综采工作面%推进速度%煤壁片帮%周期来压
大採高綜採工作麵%推進速度%煤壁片幫%週期來壓
대채고종채공작면%추진속도%매벽편방%주기래압
fully mechanized working face with large mining height%advancing speed%coal wall rib spalling%periodic weighting
以霍尔辛赫矿3207大采高工作面为工程背景,采用现场观测和数值模拟的方法对不同推进速度下煤壁片帮情况进行分析。研究结果表明当推进速度由4?4 m/d 变为2?4 m/d时,周期来压步距由19?8 m变为14?7 m,煤壁日平均片帮深度增大为原来的1?22倍,片帮范围也增大为原来的1?35倍。推进速度低导致周期来压步距短、来压频繁、煤壁暴露时间长是造成煤壁片帮情况加重的直接原因。
以霍爾辛赫礦3207大採高工作麵為工程揹景,採用現場觀測和數值模擬的方法對不同推進速度下煤壁片幫情況進行分析。研究結果錶明噹推進速度由4?4 m/d 變為2?4 m/d時,週期來壓步距由19?8 m變為14?7 m,煤壁日平均片幫深度增大為原來的1?22倍,片幫範圍也增大為原來的1?35倍。推進速度低導緻週期來壓步距短、來壓頻繁、煤壁暴露時間長是造成煤壁片幫情況加重的直接原因。
이곽이신혁광3207대채고공작면위공정배경,채용현장관측화수치모의적방법대불동추진속도하매벽편방정황진행분석。연구결과표명당추진속도유4?4 m/d 변위2?4 m/d시,주기래압보거유19?8 m변위14?7 m,매벽일평균편방심도증대위원래적1?22배,편방범위야증대위원래적1?35배。추진속도저도치주기래압보거단、래압빈번、매벽폭로시간장시조성매벽편방정황가중적직접원인。
Taking No?3207 face with large mining height in Huoerxinhe Mine as the engi-neering background,the paper uses the methods of field observation and numerical simulation to analyze the conditions of coal wall rib spalling with different advancing speed? Research results show that when the speed changes to 2?4 m/d from 4?4 m/d,the periodic weighting step distance will reach to 14?7 m from 19?8 m,and the average daily coal wall spalling depth will increase to 1?22 times of the original,with spalling range increasing to 1?35 times of the original?The short periodic weighting step distance,frequent coal wall pressure,the long exposure time of coal wall caused by low advancing speed are the direct causes of the coal wall spalling getting worse?
