摘要
为研究浅埋工作面超长工作面矿压规律,以补连塔11401综采工作面为研究对象,采用矿压监测方法,对回采期间工作面液压支架支撑压力变化趋势以及巷道稳定性进行分析。研究结果表明:工作面来压分布不均衡性、来压不同步,工作面中部来压现象明显且最早开始来压,两端头支架来压不明显,液压支架能够有效支护顶板;工作面初次来压步距为35~42 m,周期来压步距为13~16 m;工作面来压期间,巷道超前范围破坏程度较弱,采空区顶板垮落相对稳定,过下覆空巷时围岩变形量与变形速度同步增大,但整体增量偏小。
In order to study the ground pressure law of super long working face in shallow buried working face,this paper takes fulianta 11401 fully mechanized mining face as the research object,and uses the ground pressure monitoring method to analyze the variation trend of hydraulic support support pressure and roadway stability during mining.The results show that the distribution of incoming pressure in the working face is uneven and the incoming pressure is not synchronous,the phenomenon of incoming pressure in the middle of the working face is obvious and starts to press at the earliest,the incoming pressure of supports at both ends is not obvious,and the hydraulic support can effectively support the roof;The initial pressure step of the working face is 35-42 m,and the periodic pressure step is 13-16 m;During the pressure period of the working face,the damage degree of the advance range of the roadway is weak,and the roof collapse of the goaf is relatively stable.When passing through the overlying goaf,the surrounding rock deformation increases synchronously with the deformation speed,but the overall increment is small.
作者
张智
李金刚
ZHANG Zhi;LI Jingang(Liuta Coal Mine,CHN Energy Shendong Coal Group Co.,Ltd.,Erdos 017209,China;Bulianta Coal Mine,CHN Energy Shendong Coal Group Co.,Ltd.,Erdos 017209,China)
出处
《煤炭科学技术》
CAS
CSCD
北大核心
2021年第S02期30-33,共4页
Coal Science and Technology
关键词
浅埋煤层
超长工作面
矿山压力
来压步距
下覆空巷
shallow coal seam
super long working face
mine pressure
pressure step
overburden roadway
