摘要
补连塔煤矿是世界第一大单井井工矿井,形成了大量的不规则采空区,开采1-2煤必将受其上覆采空区影响大,进出采空区矿山压力显现剧烈、活柱下缩量大、甚至出现支架倾倒、压死等事故,对矿井安全生产带来较大影响。因此,矿井为减少此类灾害发生,以该矿1-2煤12415工作面穿越上覆距离仅7.9 m的11401采空区为试点采面,采用数值模拟方法分析下行近距离煤层开采在进、跨、出上覆采空区时受其影响的塑性区和围岩应力场演化特征,探寻采空区引起的强矿压显现发生的根源,给接续采面避灾方案的提出提供参考依据。
Bulianta coal mine is the world's largest single-well underground mine,forming a large number of irregular goaf,mining 1-2 coal will be greatly affected by its overlying goaf,the mine pressure in and out of the goaf is severe,the shrinkage under the movable pillar is large,even the support topples,crushing and so on.Therefore,in order to reduce the occurrence of such disasters,the experimental mining face of No.1-2 coal 12415 across the Goaf of No.11401 which overlying distance is only 7.9 m is taken as the experimental mining face,the evolution characteristics of plastic zone and surrounding rock stress field are analyzed by using numerical simulation method when the down-going short-distance coal seam is mined into,across and out of the overlying mined-out area,the source of strong ground pressure phenomenon caused by mined-out area is explored,which provides a reference for the proposal of disaster prevention in continuous mining face.
作者
韩煜
韩伟
李金刚
HAN Yu;HAN Wei;LI Jingang(China Coal Techology and Engineering Group Information Co.,Ltd.,Xi’an 710054,China;Bulianta Coal Mine of Shendong Coal Group Co.,Ltd.,Ordos 017209,China)
出处
《煤炭科学技术》
CAS
CSCD
北大核心
2022年第S02期61-68,共8页
Coal Science and Technology
关键词
补连塔煤矿
极近距离下行开采
强矿压
数值模拟
浅埋深
Bulianta Coal Mine
very close downward mining
strong rock pressure
numerical simulation
shallow burial depth
