Analysis on Measures and Effect of Relief From the Source of Danger Relief for the Rock Burst in Xiaozhuang Coal Mine
Aiming at the problem that it is difficult to accurately prevent and control rock burst,combined with the theory of dynamic and static combination superposition,the sub-source monitoring is carried out,and the hierar-chical monitoring of rock burst hazard source and the sub-source relief measures are put forward.In other words,it is necessary to monitor the dynamic load generated after coal rock breaking with the help of microseismic meth-od for the whole mine.At the same time,the ground sound method is used to monitor the key working face,and the stress on-line monitoring method and the drilling cuttings sampling monitoring method are used to realize the comprehensive monitoring of the static load of the coal body in the local dangerous area.Based on the test re-sults,a rock burst mitigation plan for the heading face and top coal was formulated and implemented on site.The results show that the mining disturbance is an important factor to induce the occurrence of rock burst.After the rock burst mitigation scheme is adopted,the average value of drilling cuttings is reduced from 2.44 kg/m and 2.26 kg/m before pressure relief to 1.98 kg/m and 1.87 kg/m respectively,which has obvious pressure relief effect and provides a way for reasonable prevention and control of rock burst.
rock burstdynamic and static combinationrelief from the sourcepressure relief effect
NETL
NSTL
万方数据
维普
