School of Mines, China University of Mining and Technology, Xuzhou 221116, China.
Engineering Laboratory of Mine Earthquake Monitoring, China University of Mining and Technology, Xuzhou 221116, China.
Sensors (Basel). 2023 Jan 13;23(2):931. doi: 10.3390/s23020931.
The hazardous effect of a mine earthquake on a roadway is not only related to its energy scale but also to its distance from the roadway. In this study, a signal attenuation model and a disaster-causing model were established to evaluate the mine earthquake effects based on peak particle velocity (PPV) data recorded for 37221-1 upper roadway of the Dongxia Coal Mine, China. The characteristic of dynamic loads due to mine earthquake propagation to roadway surfaces was researched, and critical PPV values were identified using FLAC numerical simulation, which can be used to evaluate the roadway anti-burst performance under the existing support system. The results show that the support system is able to resist a mine earthquake with energy below 2.33 × 10 J; however, considering the energy accumulation volume of surrounding rocks and the range of source fracture, the maximum resistible mine earthquake energy can be up to 7.09 × 10 J when the roadway is 50 m away from the source. The validity and applicability of the disaster-causing models was verified by two rockburst cases that occurred during the excavation of the working face.
矿山地震对巷道的危害效应不仅与其能量大小有关，还与其距巷道的距离有关。本研究基于中国东峡煤矿 37221-1 上巷所记录的峰值粒子速度（PPV）数据，建立了信号衰减模型和致灾模型，以评估矿山地震效应。研究了矿山地震传播到巷道表面的动载荷特性，并利用 FLAC 数值模拟确定了临界 PPV 值，可用于评估现有支护系统下巷道的抗爆性能。结果表明，该支护系统能够抵抗能量低于 2.33×10 J 的矿山地震；然而，考虑到围岩的能量积累量和震源断裂范围，当巷道距离震源 50 m 时，最大可抵抗的矿山地震能量可达 7.09×10 J。两个在工作面开挖过程中发生的岩爆案例验证了致灾模型的有效性和适用性。
