Table 1 Results of nitrogen adsorption tests.

From: Study on pore structure and adsorption properties of coal and microscopic action mechanism of outburst

Excavation distance(mm)

Pore volume(× 10–2 cm3/g)

BET specific area(m2/g)

Micropore

Mesopore

Macropores

Toal

300 ~ 400

0.073

0.316

0.169

0.558

3.287

400 ~ 500

0.048

0.019

0.387

0.454

2.626

500 ~ 600

0.110

0.417

0.170

0.698

4.793

600 ~ 700

0.209

0.568

0.180

0.957

7.836

700 ~ 800

0.164

0.538

0.178

0.880

6.805

800 ~ 900

0.160

0.523

0.174

0.856

6.622

900 ~ 1000

0.199

0.955

0.306

1.460

9.174

1000 ~ 1100

0.337

1.293

0.283

1.913

13.917

1100 ~ 1200

0.330

1.252

0.402

1.983

13.092

1200 ~ 1300

0.313

1.180

0.319

1.813

12.800

1300 ~ 1400

0.398

1.521

0.314

2.233

15.346

1400 ~ 1500

0.435

1.537

0.294

2.266

16.697

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