不同能级矿震波对深部盘区大巷围岩扰动效应

任文涛，郭鹏慧，曲  柱，李家卓

不同能级矿震波对深部盘区大巷围岩扰动效应

任文涛，郭鹏慧，曲柱，李家卓

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- 网络出版日期: 2023-08-30
- 刊出日期: 2023-08-22

Disturbance effect of shock bump waves with different energy levels on surrounding rock of deep roadway

REN Wentao

摘要

摘要: 进入深部开采，巷道围岩承受高静载，在局部复杂地质构造区域高水平应力的加持下，微小的动载产生的扰动效应即可诱发巷道冲击地压，不同能级矿震波对巷道产生不同的扰动效应，可以诱发巷道围岩不同位置的不同程度破坏。针对彬长矿区某煤矿一盘区大巷频繁发生冲击地压的问题，在分析巷道冲击微震监测能量特征的基础上，进行了数值模拟研究，通过应力、能量、位移表征了不同能级矿震矿震波对巷道围岩的扰动效应。结果表明：冲击地压发生前，微震监测偶有大能量事件出现，但是其余时间总频次和总能量处于较低水平，总能量往往小于105 J，发生时，微震监测总频次和总能量骤增，总能量达到105 J以上，发生后，微震监测总能量和总频次骤减，一段时间内处于静默状态；静载条件下，底板相比较顶板离层现象更显著，矿震扰动下，顶板相比较底板更易发生离层，105 J及以下能级矿震扰动下，对巷道围岩产生的影响是顶板>底板>两帮，105 J以上能级矿震扰动下，对巷道围岩产生的影响是顶板>两帮>底板。
- 不同能级 /
- 矿震波 /
- 深部巷道 /
- 微震 /
- 冲击地压
Abstract: In deep mining, the surrounding rock of the roadway is subjected to high static load. Under the support of high-level stress in the local complex geological structure area, the disturbance effect caused by small dynamic load can induce the rock burst of the roadway. Different energy level shock bump waves have different disturbance effects on the roadway, which can induce different degrees of damage in different positions of the surrounding rock of the roadway. Aiming at the problem of frequent rock burst in the main roadway of the first area of Gaojiapu Coal Mine in Binchang Mining Area, based on the analysis of the energycharacteristics of the roadway impact micro-seismic monitoring, the numerical simulation study was carried out. The stress, energy and displacement were used to characterize the disturbance effect of different energy level shock bump waves on the surrounding rock of the roadway. The results show that before the occurrence of rock burst, there are occasional large energy events in micro-seismic monitoring, but the total frequency and total energy are at a low level in the rest of the time, and the total energy is often less than 105 J. When the rock burst occurs, the total frequency and total energy of micro-seismic monitoring increase sharply, and the total energy reaches more than 105 J. After the rock burst occurs, the total energy and total frequency of micro-seismic monitoring decrease sharply, and they are in a silent state for a period of time. Under the condition of static load, the phenomenon of floor separation is more significant than that of roof separation. Under the disturbance of shock bump , the roof is more prone to separation than the floor. Under the disturbance of mine earthquake with 105 J and below, the influence on the surrounding rock of roadway is roof > floor > two sides. Under the disturbance of shock bump with 105 J and above, the influence on the surrounding rock of roadway is roof > two sides > floor.
- different energy levels /
- mine seismic wave /
- deep roadway /
- micro-seismic /
- rock burst

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不同能级矿震波对深部盘区大巷围岩扰动效应

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Disturbance effect of shock bump waves with different energy levels on surrounding rock of deep roadway

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