论文部分内容阅读
为保证红一煤矿半煤岩巷道围岩的稳定及煤矿安全开采,以红一煤矿运回联巷为工程背景,运用钻孔探测及数值模拟的方法,研究了试验段巷道顶板内部裂隙发育规律,并对比分析矩形断面和直墙半圆拱形巷道围岩塑性区及位移分布特征。研究结果表明:试验段巷道围岩锚固体承载结构相对较弱,直墙半圆拱形断面受力优于矩形断面,且直墙半圆拱形断面巷道变形小于矩形断面巷道变形。现场实测验证了以上观点。
In order to ensure the stability of surrounding rock and the safe mining of coal mine in the coal mine roadway of Hongyi coal mine, taking the coal mine back and forth in the Hongyi coal mine as the engineering background, the law of fracture development in the roof of the roadway in the test section was studied by means of borehole exploration and numerical simulation The plastic zone and displacement distribution of the surrounding rock of the rectangular section and the semi-circular arched roadway with straight wall are compared and analyzed. The results show that the bearing capacity of the surrounding rock mass in the test section is relatively weak, the stress of the semicircular arch section of the straight wall is better than that of the rectangular section, and the deformation of the semi-circular arch section of the straight wall is smaller than that of the rectangular section. Field test verified the above point of view.