燕子山矿采空区下坚硬顶板强制放顶技术设计

Design of the forced caving technology under the gob in Yanzishan coal mine

在开采采空区下煤层时,针对坚硬顶板厚度大、强度高、整体性强、基本顶不易垮落的特点,采用了爆破参数优化、现场试验以及模拟实验相结合的方法,采用深孔爆破强制放顶技术对采空区下坚硬顶板进行预裂爆破,对坚硬顶板起到了一定的破坏作用,使工作面初次来压提前到来,实现了工作面的安全回采。此次的深孔爆破强制放顶技术得到了比较显著的效果。

Mining under the gob, aiming at the character of the hard roof with large thickness, high strength, strong integrity, and the difficult collapse of main roof, using the combined optimization of blasting parameters, field test and simulation experiment method, the deep hole presplitting blasting forced caving technology was used to destroy the hard roof, and to achieve the safe mining of the working face,the deep hole blasting forced caving technology has a significant effect.