“三软”煤层沿空掘巷支护参数优化

Three Soft Coal Seam along Gob-side Entry Driving Supporting Parameter Optimization

在支承压力作用期,尤其在"三软"煤层沿空掘巷条件下,煤巷锚网支护施工技术存在一定的技术局限。显德汪矿根据采场矿压理论及实际矿压观测和实验室数据,发现了高强锚杆预紧力与预紧力矩的关系,并合理确定高强锚杆初始预紧力,保证了初期巷道支护。

During support pressure action period, especially under three soft coal seam along gob-side entry driving conditions, coal roadway anchor net supporting construction technology was confined. Xiandewang Mine, according to stope mine pressure theory practical mine pressure observation and laboratory data, found the relationship between high strength bolt pre-tightening force and tightening torque and reasonably confirmed high strength bolt initial prestressing force, ensuring the initial safety of roadway supporting.