Research on the Application of Deep Hole Prescaling Blasting Technology in Hard Roof of Fully Mechanized Mining Face
During coal mining in Jinggong Coal Mine,the mining pressure of the coal face is mainly af-fected by the roof above the working face,especially the hard roof.The large hanging area of gob roof caused by hard roof has great influence on the ore pressure appearance and safety production of fully mechanized mining face.In the process of mining,the hard roof cannot collapse in time with the advance of the working face,and a large area of suspended roof will be formed.If the sudden collapse of a large area of the roof,it will not only smash the equipment and destroy the working face,but also produce strong shock wave,causing casualties and forming a mining accident.In order to prevent the safety hazard caused by the sudden collapse of hard roof in underground coal mining,Yuanlin Coal Mine decided to adopt the forced caving technology of deep hole pre-split blasting according to the actual situation of working face W1-108.
万方数据
维普
