坚硬顶板综采面初采深孔预裂爆破技术研究

Study on Deep-hole Pre-splitting Blasting Technology in Primary Mining at Fully-mechanized Working Face with Hard Roof

针对西曲煤矿18403工作面坚硬顶板悬空较大容易引起剧烈来压等问题,根据工作面具体条件和工程经验,工作面初采期间,采用在开切眼、端头、胶带顺槽、回风顺槽实施深孔预裂爆的方法对顶板进行弱化处理。确定了炮孔布置方案及爆破技术参数,并对胶带顺槽、回风顺槽超前30 m加强支护。

Aiming at the severe weighting caused by large suspension of hard roof at 18403 working face in Xiqu Colliery,the author introduces the application of deep-hole pre-splitting blasting in open-off cut,ends,belt crossheading and return-air crossheading to roof weakening treatment in primary mining according to the working face's condition and engineering experience,in which the layout of blasting holes scheme and blasting technical parameters are determined and the support is strengthened 30 m ahead of the belt and return-air crossheading.