不同形状巷道断面对深部破碎回采煤巷的影响分析

为了确保煤矿巷道断面的合理设计，以云盖山煤矿一矿实际矿井地质条件为例，采用数值模拟软件，分别对梯形、矩形、直墙半圆拱形断面巷道进行数值模拟研究，研究了巷道周围煤岩体位移、塑性区分布，巷道周围煤岩体最大主应力、最小主应力云图。研究得出:在无支护的情况下，当采用直墙半圆拱形断面时，巷道顶板变形量、左帮变形量最小，因此该煤矿运输巷断面设计为直墙半圆拱形最合理，有利于确保矿井安全生产。

Study on influence of different roadway sections on deep broken coal mining roadway

In order to ensure the reasonable design of a mine roadway section，taking the actual mine geological condition of a coal mine as an example，the numerical simulation software was used to study the three sections of trapezoidal，rectangular and straight wall semi-circular arch.The distribution of the plastic zone，the maximum principal stress and the minimum principal stress cloud of the coal and rock mass around the roadway.It was concluded that when the semi-circular arch end face of the straight wall is used，the deformation of the roof and the deformation of the left side，the deformation of the smallest，so the coal mine roadway cross-section design for the straight wall semi-circular arch was the most reasonable，that was conducive to ensure the safety of mine production.