摘要
以虎龙沟煤矿5~#煤层为工程背景,通过理论分析、数值模拟等方法研究基岩厚度对上覆岩层活动规律影响。通过对坚硬顶板采场覆岩运动规律的分析,认为基岩和上覆的黏土层结合形成暂时稳定的"砌体梁"结构,黏土层有利于"砌体梁"结构的稳定性。基岩厚度越大则支撑压力的峰值越大,但增幅并不明显,该特征表明黏土层也具有一定的支撑能力。随着基岩厚度增大,支撑压力峰值点距煤壁距离越大,说明基岩厚度的增大使其承载能力在一定程度上变大,但支撑压力的变化并不明显。
The Hulonggou 5# coal seam is used as the engineering background, bedrock thickness on the overlying strata activity is studied by theoretical and the influence of the analysis and numerical simulation.By analyzing the movement law of overlying strata in hard roof stope, it is considered that the bedrock and overlying clay layer form a temporary stable ＂masonry beam＂ structure, and the clay layer is beneficial to the stability of ＂masonry beam＂ structure.The larger the bedrock thickness is, the greater the peak value of the support pressure is, but the increase is not obvious. This feature indicates that the clay layer also has a certain supporting capacity.With the increase of the thickness of bedrock, the support pressure peak value from wall distance is the rock bearing capacity in certain degree becomes obvious. greater, indicating that increasing the thickness of larger, but the change of support pressure is not
作者
王中
白云龙
WANG Zhong;BAI Yun-long(College of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, Chin)
出处
《煤炭技术》
CAS
2018年第7期47-49,共3页
Coal Technology
关键词
综放工作面
基岩厚度
支撑压力
运移规律
fully mechanized caving face
bedrock thickness
support pressure
migration law
