厚煤层综放面切眼跨度对围岩稳定的影响  

Effect of Fully Mechanized Caving Face Cut-hole Span for Thick Coal Seams on the Stability of Surrounding Rockmass

作　　者：贾尚昆[1] 李晓辉 高建政 

机构地区：[1]中国矿业大学矿业工程学院 [2]云南煤矿安全监察局 [3]兖煤菏泽能化有限公司

出　　处：《金属矿山》2012年第7期23-27,共5页Metal Mine

摘　　要：综放面切眼是一种特殊的煤层巷道,由于其跨度大、顶煤厚和围岩整体强度低等特点,导致切眼围岩稳定性较低,支护困难。以西沙河煤矿1901综放面为研究背景,在现场生产技术条件的基础上,总结切眼围岩的破坏规律,并利用数值模拟软件详细分析不同切眼跨度对围岩稳定性的影响。结果显示:随着切眼跨度的增大,顶板及两帮塑性区增大,最大位移值增大;且应力由帮部向顶角转移,顶角破坏严重,应重点支护。最后提出支护方案,并进行工业性试验,效果良好。The fully mechanized caving face cut-hole is a special type of coal roadway.Because of its large span,thick top coal and low strength of rock features,the cut-hole’s surrounding rock has low stability,and it is supported difficultly.Taken the background of Xishahe coal mine 1901 fully mechanized caving face,and based on production technology conditions,the damage law of cut-hole’s surrounding rock was summarized.The effect of different cut-hole span on surrounding rock stability was simulated.The results show that along with the increasing of cut-hole span,the roof and sides plastic area and maximum displacement value increases.The stress is transfer from sides to corner of cut-hole.The corner damages serious,and it should be supported specially.The support scheme is proposed finally,and industrial test is conducted.The effect is good.

关 键 词：综放面 切眼 围岩稳定性 数值模拟 

分 类 号：TD752.2[矿业工程—矿井通风与安全]