裴沟矿魔洞王水库下压煤开采技术

Mining Technology Under Modongwang Reservoir in Peigou Mine

以裴沟矿魔洞王水库下压煤开采为例,分析了31071首采工作面开采的安全性以及保护煤柱范围内限厚开采对水库大坝的影响。得出导水裂缝带的发育高度满足安全开采的要求,保护煤柱内限厚开采使大坝的受采动影响程度显著降低,大坝处损害等级在Ⅱ级以内。从保护水库大坝的角度,对综放工作面推进速度进行了分析,得出合理的推进速度为2.0～3.0 m/d。

Taking the coal mining under Modongwang reservoir of Peigou Mine as an example,the safety of mining the first mining face of 31071 and the influence of thickness-limited mining within protective pillar range on the dam are comprehensively analyzed.It is obtained that the maximum height of the water flowing fractured zone is safe for mining.The thickness-limited mining within the protective pillar makes the influence degree of mining on reservoir and dam reduced significantly;the damage level is less than Ⅱ grade.In order to protect the dam,the advancing speed of fully-mechanized working face is analyzed,which is 2.0~3.0 m/d.