摘要
针对千米垂深矿井近距离极薄保护层与被保护层协同开采条件下的矿压动态监测与围岩稳定性控制难题,以平煤十二矿为研究对象,通过现场矿压动态监测与数值模拟手段,构建工作面矿压动态监测机制,探究围岩稳定性。结果表明:工作面超前影响明显范围为15.0~30.0 m,超前支护的范围可调整至30.0 m。在老顶周期来压期间,回风巷瓦斯浓度不断增大。通过数值模拟分析得到随工作面推进距离的增加,保护层己_(15)-31050工作面采空区侧向围岩支承压力呈先增大而后趋于稳定的趋势变化,竖直位移则呈先增大后减小的趋势变化。
Aiming at the problem of dynamic monitoring of mine pressure and surrounding rock stability control under the condition of coordinated mining of the short-distance and extremely thin protective seam and the protected seam in an over 1000-meter vertical deep mine,Pingdingshan coal mine No.12 were taken as research objects.Through on-site mine pressure dynamic monitoring and numerical simulation,the dynamic monitoring mechanism of mine pressure in mining face was constructed,and the stability of surrounding rock was explored.The results showed that:the obvious range of the advance influence of the mining face is 15 to 30 m,and the range of the advance support can be adjusted to 30 m.During the periodic pressure of the main roof,the gas concentration in the return air roadway increased continuously.Through numerical simulation analysis,it is found that with the increase of the advance distance of the mining face,the lateral abutment pressure in goaf of theⅥ-31050 protected seam mining face firstly increases and then tends to be stable,and the vertical displacement of the goaf firstly increases and then decreases.
作者
邓五先
吕有厂
代志旭
张创业
王山磊
高政
DENG Wuxian;LYU Youchang;DAI Zhixu;ZHANG Chuangye;WANG Shanlei;GAO Zheng(No.12 Mine,Pingdingshan Tian′an Coal Industry Co.,Ltd.,Pingdingshan 467000,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China)
出处
《煤炭技术》
CAS
北大核心
2022年第9期75-79,共5页
Coal Technology
关键词
千米深井
近距离
极薄保护层
矿压显现
围岩稳定性
1000-meter mine
short-distance
extremely thin protective seam
mine pressure behavior
stability of surrounding rock
