GB/T 25217.3-2019Methods for test, monitoring and prevention of rock burst—Part 3: Classification and laboratory test method on bursting liability of coal-rock combinations sample (English PDF)

Foreword

GB/T 25217 "Method for measuring, monitoring and controlling impact ground pressure" is divided into 14 parts.

--- Part 1. Determination of impact tendency classification and index of roof rock formation;

--- Part 2. Determination of the impact tendency of coal and the method of determining the index;

--- Part 3. Determination of the impact tendency classification and index of coal and rock composite test pieces;

--- Part 4. Microseismic monitoring methods;

--- Part 5. Geophone monitoring methods;

---Part 6. Drill cuttings monitoring method;

---Part 7. Mining stress monitoring method;

--- Part 8. Electromagnetic radiation monitoring methods;

---Part 9. Coal seam water injection prevention methods;

--- Part 10. Coal seam drilling pressure relief method;

--- Part 11. Coal seam pressure relief blasting prevention methods;

--- Part 12. Prevention and control methods for mining protective layers;

--- Part 13. Prevention and treatment of roof deep hole blasting;

--- Part 14. Roof hydraulic pressure cracking prevention methods.

This part is the third part of GB/T 25217.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 25217 specifies the terms and definitions of the impact tendency classification and index measurement of coal and rock composite test pieces.

Classification of impact tendency and index measurement of coal and rock composite test pieces, specification requirements of instrument equipment, combined test pieces and impact tendency of combined test pieces determination.

This section applies to the determination of the impact tendency of coal and rock composite test pieces.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 23561.1-2009 Determination of physical and mechanical properties of coal and rock - Part 1

Methods of determination of physico-mechanical properties of coal and rock - Part 7. Determination of uniaxial compressive strength and softening systems Number calculation method

GB/T 25217.2-2010 Methods of measurement, monitoring and control of impacts - Part 2: Classification and index of impact of coal Measuring method

3 Terms and definitions

The following terms and definitions apply to this document.

4 Classification and index of impact tendency of coal and rock composite specimens

The strength of the impact tendency of the coal-rock composite test piece is measured according to the measured residual energy index. Coal rock combination test piece impact tendency Sex is classified into three categories according to the size of its index value, as shown in Table 1. […]