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REP30864
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REP30864
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Entry Properties
Last modified
8/25/2016 12:01:22 AM
Creation date
11/27/2007 5:45:10 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981020
IBM Index Class Name
Report
Doc Date
12/3/2001
Doc Name
LODESTAR ENGERY INC MUNGER CANYON MINE MINE PORTAL BACKFILL CERTIFICATION PN C-81-020
From
J E STOVER & ASSOCIATES
To
DMG
Permit Index Doc Type
STABILITY REPORT
Media Type
D
Archive
No
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tntb~ xn.~ ~ss.a~ittf~s <br />CONSULTING GEOTECHNICAL ENGINEERS AND MATERIAL TESTING <br />J.E. Stover and Associates <br />2768 Compass Drive Suite 101 <br />Grand Junction, Colorado 81506 <br />Attention: Mr. Jim Stover, P.E. <br />Subject: Laboratory Test Results for <br />McClain Canyon Mine near <br />Loma, Colorado <br />Mr. Stover: <br />November 28, 2001 <br />PN: M01246MT <br />This letter presents the results of the laboratory tests performed <br />for your McClain Canyon Mine project. The laboratory tests were <br />conducted on a coal gob sample delivered to our laboratory on October <br />17, 2001. The laboratory tests consisted of a moisture content-dry <br />density relationship test and a remolded triaxial compression strength <br />test. <br />Moisture content-dry density relationship test was conducted on the <br />coal gob sample delivered to our laboratory. The moisture content-dry <br />density relationship test was conducted in accordance with ASTM Test <br />Method D698. The results of the moisture content-dry density <br />relationship tests are presented on Figure 1. The moisture content- <br />dry density relationship test indicated an optimum moisture content of <br />17.0 percent and a maximum dry density of 82.0 pounds per cubic foot <br />for the sample tested. <br />Triaxial compression strength properties of a remolded sample was <br />evaluated in general accordance with testing procedures defined by <br />ASTM Test Method D2850. The sample for the triaxial compression <br />strength test was remolded to about 90 percent of the maximum dry <br />density as determined by the moisture content-dry density relationship <br />test. A consolidated drained test was performed on the remolded <br />sample tested. During the consolidated drained test the sample was <br />allowed to consolidate prior to testing the sample to failure. The <br />test was performed using a strain controlled triaxial compression <br />testing machine. The confining pressures used and the type test were <br />as directed by Mr. Jim Stover, P.E. The triaxial compression strength <br />test results are presented on Figure 2. The triaxial compression <br />strength test indicates an internal angle of friction of about 33 <br />degrees and a cohesion of about 3 pounds per square inch. <br />P. O. BOX 3888 P. O. BOX 0065 416 BODO DR, <br />GRAND JUNCTION, CO 87504 NONTROSE, CO !1104 DURANGO, CO 81001 <br />(Y70)3C5-E508 (970)t6F415/ <br />(870)458-5085 <br />FAX: (970) Y6B-0758 FAX: (970) 4~iJ484 FAX: (970) 784.2615 <br />
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