摘要
当围岩的结构、力学性质条件一致时,锚固复合承载体的强度和几何参数主要由锚杆支护参数和几何参数决定的。文章计算了半圆拱形和矩形巷道的锚固承载体的几何参数以及强度,并建立了相应的力学模型,最终获得了锚固复合承载体强度计算简化公式,得出了提高锚固复合复合承载体的方法以及各参数与锚固复合承载体强度的变化规律。然后根据上覆潜在的松动岩层重量,建立了巷道顶板破坏范围计算模型,得出了锚固复合承载体的稳定性判据公式。研究为锚杆支护参数的设计提供理论基础。
When the structural and mechanical properties of the surrounding rock are consistent,the strength and geometric parameters of the anchor composite bearing are mainly determined by the bolt support parameters and geometric parameters.This paper calculates the geometric parameters and strength of the anchorage bearing body of semi-circular arch and rectangular roadway,establishes the corresponding mechanical model,and finally obtains the simplified formula for calculating the strength of the anchorage composite bearing body,and obtains the method for improving the strength of the anchorage composite bearing body,as well as the variation law of each parameter and the strength of the anchorage composite bearing body.Then according to the weight of the overlying loose rock stratum,the calculation model of the roof roof failure range is established,and the stability criterion formula of the anchor composite carrier is obtained.The study provides a theoretical basis for the design of bolt support parameters.
作者
贾金京
Jia Jinjing(Yungaishan No.1 Coal Mine,Henan Yongjin Energy Co.,Ltd.,Yuzhou 461670,China)
出处
《能源与环保》
2019年第3期175-178,共4页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
锚固复合承载体
强度变化规律
稳定性
几何参数
松动岩层质量
anchor composite composite body
strength variation law
stability
geometric parameters
weight of loose rock layer
