阳泉矿区综放面不同护巷煤柱下应力分布规律实测研究

Measurement Study of Stress Distribution Disciplinarian on Supporting Coal Pillar for High Stress Comprehensive Mechanization Caving Face in Yangquan Mining Area

针对阳泉矿区高应力综放面沿空掘巷煤柱宽度留设不合理的问题,采用现场实测研究的方法对阳泉二矿80801及80509综放工作面不同宽度护巷煤柱及其所对应工作面实体煤内应力分布规律进行分析。实测结果表明,留设5.5 m煤柱时上覆岩层大部分载荷转移至工作面实体煤中,沿空掘巷巷道避开了侧向支承压力高峰区,维护了巷道稳定性,保证矿井高效安全生产。

Aimed at unreasonable coal pillar width design of gob-side entry driving for high stress fully mechanized caving face in Yangquan mining area, stress distribution laws in different width of coal pillars and its corresponding working face are analyzed by field measurement at 80801 and 80509 fully mechanized caving face of Yangquan No.2 coal mine. Results show that most of the overlying strata load transferred to coal at working face when coal pillar is 5.5 m wide, which helps to avoid the lateral stress peak area, improve stability of roadway, and above all it ensures safety mining with high efficiency.