PERMFILE139682

• Permit No: C1981025
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: GEOTECHNICAL CHARACTERISTICS OF MINE 3 COAL
• Section_Exhibit Name: 3.0 APPENDIX 3-E
• Media Type: D
• Archive: No

I.
TABLE 1
BRAZILIAN DISC TENSION TEST RESULTS
Brazilian Disc Tension Strength
Number Standard
of Maximum Minimum Mean Deviation
Rock Type' Samples (psi) (psi) (psi) (psi)
Floor Sandstone 4 -1213 - 818 - 940 - 185
Main Loal 3 - 105 - 138 - 120 - 17
Top Coal 1 ----- ----- - 38 -----
Immediate Roof Siltstone 1 ----- ----- -1733 -----
Roof Sandstone #,'1 3 -2334 -1212 -1914 - 612
Roof Sandstone n2 1 ----- ----- - 852 -----
Roof Sandstone ~3 1 ----- ----- -1192 -----
Roof Sandstone ;y4 1 ----- ----- -1536 -----
• Roof Sandstone ~5 2 -1477 - 913 -1195 - 399
Roof Siltstone 2 -1927 -1200 -1564 - 514
Notes:
1. See Figure 3 for location of these rock types.
Lithologic descriptions of rock types are
presented in Table 5.
2. Conversion factor:
1 psi = 6.8948 x 10 a MPa
r~