浅埋煤层长壁工作面矿压显现规律现场监测研究
首发时间:2011-07-11
摘要:浅埋条件下的煤层开采,受上覆岩层移动影响而呈现与深埋煤层明显不同的特征。本文以神府矿区某矿1301工作面矿压观测为工程背景依托,应用“三量法”对工作面矿压显现规律进行研究,以工作面三个测区支架荷载和活柱下缩量为重点分析。研究表明:该工作面来压动载系数为1.5~1.6,来压期间支架压力比平时大1~13MPa;初次来压持续时间长,初次来压步距在55.9~56.3m,三个测区的周期来压步距为14.6~17.6m;且三个测区观测表明:中测区由于受工作面两侧煤壁影响较小,矿压显现程度同上下测区比较明显。
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Research on behavior law of mine pressure of long-wall face in shallow seam with in-situ monitoring
Abstract:Seam mining in shallow condition, it affected by overlying strata movement shows obviously different characteristics with deep seam. Based on mineral pressure observation of 1301 mining face in one coal mine of shenfu mining area, the behavior law of mine pressure was studied with "three measuring method" . Support loading and descending amount of piston were detailedly analyzed. The results show that the dynamic load coefficient of this working face is between 1.5 and 1.6. When periodic roof pressure occurred supporter pressure roof pressure is 1MPa to 13MPa bigger than usual time. First roof pressure is 55.9m to 56.3m and periodic roof pressure length is 14.6m to 17.6m. Mine pressure strength of middle test area affected by both sides coal wall is strongest.
Keywords: shallow seam long-wall combined-mining face behavior law of mine pressure in-situ monitoring
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No.4434528558713130****
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