唐口煤业煤岩层冲击倾向性试验研究

Experiment Study of Burst Tendency of Coal and Rock Layers at Tangkou Coal Mine

在采深1 000 m的条件下,随着地应力的增大,煤矿煤、岩层的冲击倾向性将会更加明显。在唐口煤业的生产实际条件下,通过试验对唐口煤业首采区冲击地压发生的可能性和可能危害程度进行了研究。试验表明,该煤岩层具有突然破坏并瞬间释放大量弹性变形能的能力,其中3上煤层具有强冲击倾向性,3上煤顶板具有弱冲击倾向性。

Under the depth of 1 000 m, the burst tendency is more apparent with the increasing of stress. According to the actual production situation of Tangkou mine, the probability and dangerous degree of pressure burst is researched in the first mine area. The results show the coal and rock layers have the ability of abruptly broken and quickly releasing large elastic deformation energy, the No. 3U coal seam has the strong burst tendency and the roof of No. 3U coal seam has the weak burst tendency. The necessary condition for the occurrence of pressure burst is the rock and coal layers with the burst tendency. At the same time, whether the bin, st of coal and rock layers happen or not, which relate to the depth of exploitation, the way of coal mining and the state of stress. The results also provide technical support for the prevention of coal bumping tendency, and have an important meaning for the direction of the control of the pressure burst.