不同采厚下的导水裂隙带发育高度研究

Study on the Development Height of Water Conducting Fracture Zone under Different Mining Thickness

为延长矿井服务年限,实现煤矿安全生产,同时应用好综合防治水技术,主要分析不同采厚高度(3 m、6 m、9 m)下综放开采工作面的垂直位移变化情况。分析表明:上覆岩层的垂直位移随着煤层开采厚度的增大而增大,且下沉盆地也随着煤层的开采而显著增大;当采厚较小时,导水裂隙带发育高度随着采高的增大而显著增大,当出现裂隙带发育至松散层时,继续增大采高,裂隙带反而缓慢发育。

In order to extend the service life of the mine,realize the safety production of the coal mine,and apply the comprehensive water control technology,the vertical displacement changes of the fully mechanized top coal caving mining face under different mining thickness heights(3 m,6 m,9 m)are mainly analyzed.The analysis shows that the vertical displacement of the overlying strata increases with the increase of the mining thickness of the coal seam,and the subsidence basin also increases significantly with the mining of the coal seam.When the mining thickness is small,the development height of the water diversion fracture zone increases significantly with the increase of mining height.When the fracture zone develops to the loose layer,continue to increase the mining height,and the fracture zone develops slowly.