矩形煤巷两帮塑性区宽度计算方法研究

Study on Calculating the Width of Plastic Zone in Two Sides of Rectangular Coal Drift

以极限平衡理论为基础,结合应力平衡原理,提出一种计算矩形巷道塑性区宽度的新方法。以张家峁煤矿的巷道为算例,应用新方法和等效圆方法分别计算巷道塑性区宽度,并将两种方法的计算结果与数值模拟结果进行对比分析。结果表明,计算塑性区宽度与数值模拟的结果较接近,比等效圆方法更精确,能够为煤矿巷道支护设计提供更准确的参数。

Based on the limit equilibrium theory,and combined with the stress balance principle,a new method for calculating the width of plastic zone in rectangular coal drift was proposed.Taking the drift of Zhangjiamao coal mine for an example,the width of plastic zone was calculated by new method and equivalent circle method.Then,the calculation results and the numerical simulation results of two methods were compared.The results showed that the width of the plastic zone calculated by the new method was close to the numerical simulation results,being more precise than the equivalent circle method,which can provide more accurate parameters for the support design in coal drift.