唐口煤矿2307工作面煤层高压注水工艺实践

Practice of Coal Seam High Pressure Water Injection Technology at 2307 Working Face of Tangkou Coal Mine

基于唐口煤矿主采工作面3#煤层注水困难的问题,对2307工作面原有的注水方案和施工系统进行了改进。通过对注水点进行采样,观察其水分增量及润湿范围可得出最优的注水压力为20 MPa。通过对降尘效率的考察,得出煤层注水和喷雾降尘的联合降尘措施可以使呼吸性粉尘降尘率达80%。同时通过对矿压情况的监测,可以看出煤层注水使煤体应力得到有效控制,大大降低了2307工作面冲击的危险性,保证了2307工作面的安全回采。

Aiming at the difficulty in water injection of 3# coal seam at main mining working face in Tangkou Mine, the original water injection project and construction system for 2307 working face were improved. Based on the sampling at injection point, we can obtain the optimal injection pressure was 20 MPa by the inspection of moisture increment and wetting range. Through the investigation of dust removal efficiency, we can draw a conclusion that if the seam water injection and spray dust prevention measures were used together, the dust fall rate was above 80%. At the same time, through the detection of ground pressure, we can see that the stress of coal seam has been effectively controlled by coal seam water injection. It reduces outburst risk greatly at 2307 working face and ensures the safety mining of 2307 working face.