超长推进距离综采工作面顺采沿空掘巷技术研究

Study on Technology of Sequential Replacement of Gob-side Entry Driving in Fully Mechanized Mining Face with Super-long Advancing Distance

为了解决超长推进距离综采工作面采用双巷掘进存在回采率低、二次采动巷道维护困难等问题,以及采用沿空掘巷技术为避免孤岛工作面需在采区或煤层间跳采无法满足集中生产要求且易造成压煤等问题,提出了超长推进距离工作面顺采沿空掘巷技术,应用于察哈素煤矿31303接续工作面中,并结合理论分析与现场实测,确定了顺采沿空掘巷技术的关键参数。该技术使辅助运输巷避免采动的剧烈影响,改善了巷道围岩应力状态,实现了沿空掘巷的工作面顺采。

In order to solve the problem of double roadway driving and the difficulties existing in the application of the technology of driving roadway along the goaf,the super-long propulsion is put forward. The technology of the distance face along the gob is applied to the 31303 super-long distance working face. The key parameters of the technology are determined by combining the theoretical analysis and the field measurement. This technology can avoid the severe influence of mining,improve the maintenance state of roadway,realize the smooth mining of roadway along the goaf,and recover most coal pillars between the two roadways,so that the recovery rate can be improved significantly.