Fracturing method for coal mine working face roof at end mining stage and mining stopping isobaric method

• Main Authors: SUN ZHONGXUE, SU ZHENGUO, BI HUIJIE, WANG HONGWEI, LI SHAOGANG, MO YUNLONG, WANG JIANDA, TU QI
• Format: Patent
• Language: Chinese; English
• Published: 30.06.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; MINING OR QUARRYING

The invention discloses a coal mine working face roof fracturing method in the end mining stage and a mining stopping isobaric method. The end mining stage coal mine working face roof fracturing method comprises the following steps that S1, the positions of fracture lines L1 and L2 are calculated, the distance between the fracture line L1 and a retracement roadway is W, and the distance between the fracture line L2 and the retracement roadway is W '; s2, the positions of a high-position roof and a low-position roof which play a main control role on roof caving are determined, and the height from the high-position roof to the working face is larger than the height from the low-position roof to the working face; and S3, the low-position top plate and part of the high-position top plate located between the fracture line L1 and the fracture line L2 are subjected to fracturing treatment, and the low-position top plate and the high-position top plate located on the rear side of the fracture line L2 are subjected to