The Study on Large-Diameter Drilling Prevention Method of Rock Burst in the Xinxing Coal

Figure 13

The distribution of the plastic zone of drilling holes along the direction of the working face.

(a) 4 m cross section in front of the work front (close to the upper lane)

(b) 6 m section in front of the working face (close to the upper lane)

(c) 8 m section in front of the work front (close to the upper lane)

(d) 10 m cross section in front of the working face (close to the upper lane)

(e) 4 m cross section in front of the work front (close to the lower lane)

(f) 6 m cross section in front of the working face (close to the lower lane)

(g) 8 m section in front of the working face (close to the down lane)

(h) 10 m cross section in front of the working face (close to the down lane)