孤岛工作面近断层开采保护煤柱合理宽度留设

Reasonable Width Setting of Protective Coal Pillar for the Near-fault Mining of Isolated Working Face

综合运用数值模拟、理论分析及现场实测等手段,研究了孤岛工作面近断层开采时保护煤柱采动应力分布规律。结果表明:保护煤柱宽度为35m时,采动峰值应力均向近工作面处移动;煤柱留设45m时为临界宽度,采动应力出现跳跃式增长,大于临界宽度时采动应力增幅较小。

The distribution law of the mining stress of protective pillar was studied by means of numerical simulation,theoretical analysis and field measurement.The results show that when the width of protective pillar is 35m,the peak stress of mining moves towards the working face;when the pillar is set at 45m,the critical width of mining stress increases by leaps and bounds;when the width of protective pillar is larger than the critical width,the increase of mining stress is smaller.