摘要
巷道掘进后,需要施加支护以增强围岩的稳定性,对巷道掘进后空顶距离和支护作业进行合理规划后可以有效提高巷道掘进效率。以红阳三矿1201掘进工作面为工程背景,通过FLAC^(3D)分析了工作面围岩受力特征,以冒落拱理论为指导,计算了冒落拱的高度得出掘进工作面顶板的覆岩载荷,最终建立了掘进面顶板的力学模型,计算出合理空顶距离。实践证明,在保证工人安全和围岩稳定的基础上,合理延长空顶距离后再对围岩进行及时有效支护可以提高掘进效率。
After roadway excavation,support is required to enhance the stability of surrounding rock.Reasonable planning of the empty roof distance and support operation after roadway excavation can effectively improve the efficiency of roadway excavation.Taking the 1201 heading face of Hongyang No.3 Coal Mine as the engineering background,the stress characteristics of the surrounding rock of the working face are analyzed through FLAC^(3D).Guided by the theory of falling arch,the height of falling arch is calculated to obtain the overburden load of the head-on roof of the heading face.Finally,the mechanical model of the heading face roof is established to calculate the reasonable empty roof distance.Practice has proved that on the basis of ensuring the safety of workers and the stability of surrounding rock,reasonable extension of the empty roof distance and timely and effective support of surrounding rock can improve the tunneling efficiency.
作者
张铁军
李伟涛
尹松阳
ZHANG Tie-jun;LI Wei-tao;YIN Song-yang(Liaoning Energy and Coal Power Industry Co.,Ltd.,Shenyang 110014,China;School of Mechanics and Architectural Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《煤炭科技》
2022年第5期50-53,57,共5页
Coal Science & Technology Magazine
基金
国家自然科学基金(41941018)。
关键词
受力特征
空顶距
数值模拟
临时支护
stress characteristics
headspace distance
numerical simulation
temporary suppot
