GB/T 25217.12-2019 PDF EnglishUS$199.00 · In stock · Download in 9 seconds
GB/T 25217.12-2019: Methods for test, monitoring and prevention of rock burst -- Part 12: Prevention method of protective seam mining Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 25217.12-2019: Methods for test, monitoring and prevention of rock burst -- Part 12: Prevention method of protective seam mining---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25217.12-2019 Methods for test, monitoring and prevention of rock burst - Part 12. Prevention method of protective seam mining ICS 73.020 D20 National Standards of People's Republic of China Impact ground pressure measurement, monitoring and prevention methods Part 12. Prevention and control methods for mining protective layers Methodsfortest, monitoringandpreventionofrockburst- Part 12.Preventionmethodofprotectiveseammining Published on.2019-08-30 2020-03-01 implementation State market supervision and administration China National Standardization Administration issued ForewordGB/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 12th part of GB/T 25217. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part is proposed and managed by the China Coal Industry Association. This section drafted by. Tiandi Technology Co., Ltd., Coal Science and Technology Research Institute Co., Ltd., Beijing University of Science and Technology, Liaoning Engineering Technical University, China University of Mining and Technology, Liaoning University. The main drafters of this section. Pan Junfeng, Qi Qingxin, Jiang Fuxing, Pan Yishan, Qin Zikai, Dou Linming, Deng Zhigang, Cao Anye, Tang Jupeng, Zhang Chenyang. Impact ground pressure measurement, monitoring and prevention methods Part 12. Prevention and control methods for mining protective layers1 ScopeThis part of GB/T 25217 specifies the terms and definitions of the method for controlling the impact pressure of the mining protective layer and the applicable conditions for the exploitation of the protective layer. And selection principle, protective layer mining design, protection scope and protection effect, pressure relief period. This part is applicable to the prevention and control of impact ground pressure by mining protective layer in coal seam.2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. AQ1050 protective layer mining technical specification3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Protective layer Coal seams that are first mined to eliminate or reduce the risk of impact from adjacent coal seams. Note. When the protective layer is located above the protected coal seam, it is called the upper protective layer, and it is called the lower protective layer below the protected layer. 3.2 Protected layer protectedseam Due to the pressure relief effect of the protective layer mining, the impact risk is eliminated or reduced by the adjacent impact coal seam. 3.3 Protection range protectionrange The protective layer exploits areas that spatially reduce or eliminate the risk of impact from the protected coal seam. 3.4 Maximum protection offset maximumprotectiveverticaldistance The maximum distance from the protective layer in the normal direction of the coal seam within the protective range during the protection of the protective layer. 3.5 Protection effect The extent to which the impact risk of the protective layer is eliminated or reduced within the protection of the protective layer. 3.6 Pressure relief period pressurereliefperiod The time from the end of the protective layer mining to the failure of the pressure relief. 3.7 Pressure relief angle-pressure In the coal seam propensity profile, the line between the mining boundary of the protective layer and the boundary of the protected area of the protected layer, between the connecting line and the protective layer Angle. GB/T 25217.12-2019 Methods for test, monitoring and prevention of rock burst - Part 12. Prevention method of protective seam mining ICS 73.020 D20 National Standards of People's Republic of China Impact ground pressure measurement, monitoring and prevention methods Part 12. Prevention and control methods for mining protective layers Methodsfortest, monitoringandpreventionofrockburst- Part 12.Preventionmethodofprotectiveseammining Published on.2019-08-30 2020-03-01 implementation State market supervision and administration China National Standardization Administration issuedForewordGB/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 12th part of GB/T 25217. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part is proposed and managed by the China Coal Industry Association. This section drafted by. Tiandi Technology Co., Ltd., Coal Science and Technology Research Institute Co., Ltd., Beijing University of Science and Technology, Liaoning Engineering Technical University, China University of Mining and Technology, Liaoning University. The main drafters of this section. Pan Junfeng, Qi Qingxin, Jiang Fuxing, Pan Yishan, Qin Zikai, Dou Linming, Deng Zhigang, Cao Anye, Tang Jupeng, Zhang Chenyang. Impact ground pressure measurement, monitoring and prevention methods Part 12. Prevention and control methods for mining protective layers1 ScopeThis part of GB/T 25217 specifies the terms and definitions of the method for controlling the impact pressure of the mining protective layer and the applicable conditions for the exploitation of the protective layer. And selection principle, protective layer mining design, protection scope and protection effect, pressure relief period. This part is applicable to the prevention and control of impact ground pressure by mining protective layer in coal seam.2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. AQ1050 protective layer mining technical specification3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Protective layer Coal seams that are first mined to eliminate or reduce the risk of impact from adjacent coal seams. Note. When the protective layer is located above the protected coal seam, it is called the upper protective layer, and it is called the lower protective layer below the protected layer. 3.2 Protected layer protectedseam Due to the pressure relief effect of the protective layer mining, the impact risk is eliminated or reduced by the adjacent impact coal seam. 3.3 Protection range protectionrange The protective layer exploits areas that spatially reduce or eliminate the risk of impact from the protected coal seam. 3.4 Maximum protection offset maximumprotectiveverticaldistance The maximum distance from the protective layer in the normal direction of the coal seam within the protective range during the protection of the protective layer. 3.5 Protection effect The extent to which the impact risk of the protective layer is eliminated or reduced within the protection of the protective layer. 3.6 Pressure relief period pressurereliefperiod The time from the end of the protective layer mining to the failure of the pressure relief. 3.7 Pressure relief angle-pressure In the coal seam propensity profile, the line between the mining boundary of the protective layer and the boundary of the protected area of the protected layer, between the connecting line and the protective layer Angle. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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