摘要
首采工作面的地表岩移参数可以为后续的安全回采提供理论指导,对覆岩中含水层、地表建(构)筑物的保护同样具有重要作用。为了对后期开采提供技术保障,曹家滩煤矿开展了首采工作面地表移动规律分析。结合首采工作面地表移动观测站监测数据,分析不同走向和倾向的下沉、水平移动曲线;基于UDEC数值模拟软件,建立数值模拟模型,探究地表裂缝发育移动规律;并采用物理模拟方法对工作面10次周期来压的覆岩移动规律分析。结果表明,地表的下沉只出现在采空区上部及附近一定范围内,且其下沉呈对称分布;地表下沉在第7次来压后就趋于稳定,最大下沉量为4.21 m,倾向模型的最大下沉量为3.36 m;物理模拟方法得出和数值模拟类似的规律,与实测结果一致。
The surface movement parameters of the first mining face can provide theoretical guidance for the subsequent safe mining,and also play an important role in the protection of aquifer in the overburden and surface buildings(structures).In order to provide technical support for later mining,the surface movement law of the first mining face is analyzed in Caojiatan mine.Based on the monitoring data of the surface movement observation station in the first mining face,the subsidence and horizontal movement curves with different trends and inclinations are analyzed.Based on the UDEC numerical simulation software,the numerical simulation model is established to explore the development and movement law of surface fractures.The movement law of overburden under ten times periodic weighting in working face is analyzed by physical simulation method.The results show that the surface subsidence only occurs in the upper part of the goaf and nearby a certain range,and its subsidence is symmetrical distribution;the surface subsidence tends to be stable after the seventh periodic weighting,the maximum subsidence is 4.21 m,the maximum subsidence of the incline model is 3.36 m;the laws obtained by physical simulation and numerical simulation are consistent with the measured results.
作者
华照来
李锦明
HUA Zhao-lai;LI Jin-ming(Shaanxi Shanmei Caojiatan Mining Co.,Ltd.,Yulin 719000,China)
出处
《陕西煤炭》
2020年第4期131-134,共4页
Shaanxi Coal
关键词
首采工作面
地表移动
覆岩移动
周期来压
地表下沉量
first mining face
surface movement
overburden movement
periodic weighting
surface subsidence
