矿井首采工作面停采位置确定研究

Study on Determination of Stopping Position in the First Mining Face of Mine

以矿井1301首采工作面为工程实例,采用现场实测、数值模拟等技术方法对停采煤柱宽度进行确定。研究发现,发现当煤柱宽度为90 m时采区回风巷围岩变形量、塑性区分布等基本不受采面采动动压影响。为此,将1301首采工作面推进至1 470 m时停止回采停采,即将停采煤柱宽度设计为90 m。现场应用后,采区回风巷围岩变形量较小,围岩变形不受采面回采影响,现场取得较好应用成果。

Taking the first mining face of mine 1301 as an engineering example, the width of stopping coal pillar is determined by using technical methods such as field measurement and numerical simulation. It is found that when the coal pillar width is 90 m, the surrounding rock deformation and plastic zone distribution of the return air roadway in the mining area are basically not affected by the mining dynamic pressure of the mining face. Therefore, when the 1301 first mining face is advanced to 1470 m, the mining is stopped, that is, the width of the stopping pillar is designed to be 90 m. After field application, the surrounding rock deformation of return air roadway in mining area is small, and the surrounding rock deformation is not affected by mining face, and good application results are obtained on site.