Study on the Evolution Law of Fracture Field in Full-Mechanized Caving Mining of Double System and Extrathick Coal Seam

Figure 7

The vertical displacement curves of five survey lines: (a) the vertical displacement curve of survey line of number 1; (b) the vertical displacement curve of survey line of number 2; (c) the vertical displacement curve of survey line of number 3; (d) the vertical displacement curve of survey line of number 4; (e) the vertical displacement curve of survey line of number 5.

(a)

(b)

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(d)

(e)