钱营孜煤矿采区集中石门过大断层支护技术研究

Study on Super-Large Fault Support Technology for Concentrated Shimen in Mining Area of Qianyingzi Coal Mine

摘要: 根据钱营孜煤矿断层条件及矿山生产过断层要求，研究提出一种超前管棚 + 管缝式锚杆超前支护作掩护技术，主要包括：采用管棚超前预注浆加固围岩、采用超前管缝锚杆 + U型棚支护方式控制顶板、设置围岩变形观测站。方案在钱营孜煤矿实际施工后表明：巷道变形小于20 mm，施工支护效果显著提高、施工进度加快50%，施工工期缩短明显、节约成本73万元，经济效益显著。

Abstract: According to the fault condition of Qianyingzi coal mine and mine production requirements, a kind of advanced pipe jacket and pipe anchor bolt advance protection technology is proposed. It mainly includes: the use of pipe roof advance pre-grouting to strengthen the surrounding rock, the use of advanced pipe-joints anchor and U-type shed support way to control the roof, setting the surrounding rock deformation observation station. The scheme after implementation shows that: the deformation of roadway is less than 20 mm; the construction support effect is improved obviously; the construction progress is accelerated by 50%; the construction period is shortened obviously; the cost saves 730,000 yuan; the economic benefit is remarkable.