Research Article
Study on Change Rules of Factors Affecting Gas Loss during Coalbed Air Reverse Circulation Sampling
Figure 12
The cumulative distribution of particle size after the tests of single particle coal sample. (a) Original size: 1−3 mm. (b) Original size: 3-4 mm. (c) Original size: 4-5 mm. (d) Original size: 5-6 mm. (e) Original size: 6-7 mm. (f) Original size: 7-8 mm.
(a) |
(b) |
(c) |
(d) |
(e) |
(f) |