两硬薄煤层综采工作面围岩运动规律与矿压显现规律研究

Study on Behavior Rule of Rock Movement and Pressure of Fully Mechanized Working Face Inmedium-two Hard Thickness Coal Seam

针对姜家湾煤矿8213薄煤层综采工作面的地质条件,并结合8213薄煤层工作面现场连续观测矿压数据,应用相似材料模拟和现场实测两种方法对工作面矿压显现规律及围岩运动规律进行研究。研究表明,姜家湾矿8213工作面老顶初次来压范围是40～41 m,老顶周期来压是12～22 m,来压期间矿压显现强度平均在20 MPa左右,顶板运动范围为工作面上方6～23 m。这说明薄煤层工作面顶板的运动范围较小,工作面来压强度较低。

For thin seam coal mining face of the geological conditions of Jiangjiawan coal mine 8231, and combined with thin-seam continuous observations of rock pressure face on-site data of 8231, numerical simulation and field measurement of similar material are used to research the face mine pressure show regular pattern and the surrounding rocks＇ movement rules. The results show that the face scope of the initial pressure of Jiangjiawan 8231 is 40 ~ 41 m; the cycle pressure is 12 ~ 22 m; the average strength of mine pressure during the pressure is about 20 MPa ; the roof movement range is 6 - 23 m above the face. It＇s indicated that the movement range of the thin seam face roof is small, with low pressure strength.