深井冲击倾向性试验及防治措施

Test and Prevention Measures of Burst Potential in Deep Well

为研究冲击地压发生机理,结合某矿工程实践,研究主采3煤层的煤岩冲击倾向性,通过对煤样动态破坏时间、弹性能量指数、冲击能量指数、单轴抗压强度4个煤层冲击能量指标,以及岩样的复合顶板弯曲能量指数进行试验和分析,表明3煤层具有弱冲击倾向性,其顶板岩层具有弱冲击倾向性。在此基础上,结合地质条件,提出回采时冲击地压防治措施,保证了安全高效开采。

In order to investigate occurrence mechanism of rock burst, the authors study on coal burst potential of main No. 3 coal seam was researched by testing and analyzing the four seam impact energy index such as dynamic failure duration, elastic energy index, impact energy index and uniaxial compressive strength of coal sample, and as well as bending energy index in compound roof of rock sample by engineering practice of certain Mine. The test shows that No. 3 coal seam and its roof strata have weak burst potential. Based on this and combined with geological condition, the authors points out that prevention measures of rock burst while stoping guaranteed safety and high effective mining.