煤层赋存状态突变对动力灾害的影响

Sudden Change of Seam Deposit Condition Affected to Dynamic Disaster

动力灾害严重威胁着矿井安全生产,它的发生与煤层应力关系密切。文章采用数值模拟手段对三种不同煤层赋存状态突变条件下的应力分布状况进行了分析。结果显示,如果煤层赋存状态突变,则应力集中;并且,当煤层倾角和厚度同时变化时,集中程度更加剧烈,可为煤岩动力灾害的发生创造非常有利的条件。

The dynamic disaster is seriously threatening to the mine safety production. The occurrence of the disaster has a close relationship with the seam stress. With the numerical simulation means, the paper analyzed the stress distribution conditions under the sudden changes of three different seam deposit status. The results showed that when the seam deposit status suddenly changed, the stress could be concentrated. When the seam angle and the thickness simultaneously changed, the stress concentration degree would be more serious and would create favorable conditions to cause the coal and rock dynamic disaster.