GB/T 23561.10-2010Methods for determining the physical and mechanical properties of coal and rock - Part 10: Methods for determining tensile strength of coal and rock (English PDF)

1 Scope

This section GB/T 23561 specifies the method determined by splitting the terms and definitions, equipment, coal and rock tensile strength involved,

Specimen size, measuring step and calculated data.

This section applies to standard test pieces can be made of coal and rock.

2 Normative references

The following documents contain provisions which, through reference GB/T 23561 in this section constitute provisions of this section. For dated reference documents

Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section

Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 23561.7-2009 physical and mechanical properties of coal and rock measuring methods - Part 7. Determination of uniaxial compressive strength and softening system

Calculation method

3 Terms and Definitions

The following terms and definitions apply to this part of the GB/T 23561 of.

4 Equipment

The main equipment are.

a) Diamond machine, sawing machine, grindstone or grinding machines;

b) splitting method test jig or pad bar pad bar should use a diameter of 2.0mm ~ 3.0mm steel wire or larger than the width of the specimen diameter

0.08 to 0.10 of rubber wood;

c) vernier caliper. minimum scale value 0.02mm;

d) Universal angle gauge, dial indicator holder and dial indicator;

e) level detection Taiwan;

f) testing machine. accuracy should not be less than level 1. Load range should satisfy the formula (1).

1.25Pmax \u003cP0 \u003c5Pmax (1)

Where.

Pmax --- expected maximum failure load, in units of kN (kN);

P0 --- material testing machine maximum range, the unit is kN (kN).