China Safety Science Journal ›› 2022, Vol. 32 ›› Issue (3): 144-151.doi: 10.16265/j.cnki.issn1003-3033.2022.03.020
• Safety engineering technology • Previous Articles Next Articles
XIONG Yu1(), KONG Dezhong1,**(), YANG Shengli2, WU Guiyi1, ZUO Yujun1, CHENG Zhanbo3
Received:
2021-12-11
Revised:
2022-02-15
Online:
2022-08-23
Published:
2022-09-28
Contact:
KONG Dezhong
XIONG Yu, KONG Dezhong, YANG Shengli, WU Guiyi, ZUO Yujun, CHENG Zhanbo. Cloud model identification of coal face stability in steeply inclined working faces[J]. China Safety Science Journal, 2022, 32(3): 144-151.
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URL: http://www.cssjj.com.cn/EN/10.16265/j.cnki.issn1003-3033.2022.03.020
Tab.1
Classification of evaluation indexes of coal face stability
评价指标 | 评价等级 | |||
---|---|---|---|---|
I级 | Ⅱ级 | Ⅲ级 | IV级 | |
C1 | 0.6~0.8 | 0.8~0.9 | 0.9~1 | 1~1.2 |
C2/% | 80~100 | 60~80 | 40~60 | <40 |
C3/% | 80~100 | 60~80 | 40~60 | <40 |
C4/MPa | >1.5 | 1~1.5 | 0.5~1 | <0.5 |
C5/(°) | >35 | 30~35 | 25~30 | <25 |
C6(0~100) | 0~20 | 20~40 | 40~60 | 60~100 |
C7(0~100) | 0~20 | 20~40 | 40~60 | 60~100 |
C8/m | 0.7~2 | 2~3.5 | 3.5~5 | >5 |
C9/(°) | 0~20 | 20~35 | 35~45 | 45~55 |
C10/(°) | 3.5~5 | 5~6.5 | 6.5~8 | >8 |
C11/% | 85~100 | 65~85 | 40~65 | <40 |
Tab.2
Calculation results of judgment matrix
判断 矩阵 | 特征向量Uj | 指标权重ωj | 一致性比 率CR | 一致性 检验 |
---|---|---|---|---|
MA | (0.368 51, 0.341 74, 0.289 75) | 0.368 5, 0.341 7, 0.289 8 | 0.002 913 | 通过 |
MB1 | (0.558 42, 0.319 62, 0.121 96) | 0.558 4, 0.319 6, 0.122 0 | 0.015 771 | 通过 |
MB2 | (0.389 4, 0.377 44, 0.131 1, 0.102 06) | 0.389 4, 0.377 4, 0.131 1, 0.102 1 | 0.030 33 | 通过 |
MB3 | (0.476 85, 0.269 65, 0.173 99, 0.079 511) | 0.476 9, 0.269 6, 0.174 0, 0.079 5 | 0.021 975 | 通过 |
Tab.4
Cloud digital characteristics of comprehensive standard of various indexes
评价指标 | 评价标准等级 | ||||
---|---|---|---|---|---|
Ⅰ级 | Ⅱ级 | Ⅲ级 | Ⅳ级 | ||
一级 指标 | B1 | (0.136 3,0.045 3,0.05) | (0.364 2,0.030 2,0.05) | (0.547 5,0.030 2,0.05) | (0.819 5,0.060 3,0.05) |
B2 | (0.119 2,0.039 9,0.05) | (0.357 5,0.039 9,0.05) | (0.595 8,0.039 9,0.05) | (0.857 5,0.047 8,0.05) | |
B3 | (0.124 6,0.041 5,0.05) | (0.369 7,0.040 0,0.05) | (0.601 7,0.037 1,0.05) | (0.853 9,0.047 7,0.05) | |
总指标 | (0.127 1,0.042 4,0.05) | (0.363 5,0.036 4,0.05) | (0.579 7,0.035 5,0.05) | (0.842 5,0.052 4,0.05) |
Tab.5
Digital characteristics of second level indexes
二级 指标 | 评价指标值 | Ex | En | He | |
---|---|---|---|---|---|
最大 | 最小 | ||||
C1 | 0.97 | 0.71 | 0.401 5 | 0.073 | 0.1 |
C2 | 81 | 71.5 | 0.237 5 | 0.015 8 | 0.12 |
C3 | 90 | 75 | 0.175 | 0.025 | 0.12 |
C4 | 0.6 | 0.34 | 0.765 | 0.021 7 | 0.09 |
C5 | 22 | 20 | 0.95 | 0.016 7 | 0.09 |
C6 | 70 | 55 | 0.625 | 0.15 | 0.13 |
C7 | 65 | 45 | 0.55 | 0.033 | 0.12 |
C8 | 3.9 | 2.3 | 0.38 | 0.043 3 | 0.09 |
C9 | 50 | 23 | 0.7 | 0.07 | 0.09 |
C10 | 7 | 5 | 0.385 | 0.051 7 | 0.09 |
C11 | 70 | 45 | 0.575 | 0.041 7 | 0.14 |
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