Geofluids / 2021 / Article / Tab 2

Research Article

Prediction of Stope Stability Using Variable Weight and Unascertained Measurement Technique

Table 2

Classification criterion of qualitative indices.

Classification standardValueSituation of joint development ()Situation of pillar ()

1Joint is undeveloped, joint  mRock is completed and no fracture
2Joint is undeveloped, joint spacing 1~3 m, rocks are cut into giant block rockThere are some fractures around the corner
3Joint is little developed, joint spacing 0.4~1 m, rocks are cut into block rockThere are cracks on the pillar, and the crack  mm
4Joint is developed, joint spacing 0.2~0.4 m, rocks are cut into stoneThere are cracks on the pillar, and the crack widths are 5-10 mm
5Joint is very developed, joint  m, rocks are cut into crushed stoneThe pillar is broken into bulk, the expansion of fracture through the pillar

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