NB/T 10730-2021 English PDF

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NB/T 10730-2021: Technical specification for exploration and treatment of water conductivity of fault in underground coal mine
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Basic data

Standard ID: NB/T 10730-2021 (NB/T10730-2021)
Description (Translated English): Technical specification for exploration and treatment of water conductivity of fault in underground coal mine
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: D01
Word Count Estimation: 14,194
Issuing agency(ies): National Energy Administration

NB/T 10730-2021: Technical specification for exploration and treatment of water conductivity of fault in underground coal mine

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical specification for exploration and treatment of water conductivity of fault in underground coal mine ICS 73.020 CCSD00/09 People's Republic of China Energy Industry Standard Exploration and Treatment of Water Conductivity of Underground Faults in Coal Mine specifications Published on 2021-11-16 2022-02-16 Implementation Released by the National Energy Administration directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Water conductivity exploration of underground faults in coal mines 1 4.1 General provisions 1 4.2 Probing Principle 2 4.3 Exploring Basics 2 4.4 Probing method 2 4.5 Probe Requirements 3 4.6 Water conductivity criterion 3 5 Treatment of underground water-conducting faults in coal mines 3 5.1 General provisions 3 5.2 Design and construction of grouting holes 3 5.3 Grouting process 4 5.4 Criteria for end of grouting 5 6 Inspection of grouting effect of underground water-conducting faults in coal mines 5 6.1 Effect inspection hole arrangement 5 6.2 Qualification requirements for effect inspection 6 Appendix A (Informative) Exploring Drilling Layout and Parameters 7 A.1 Choice of drilling arrangement 7 A.2 Drilling parameters 8 Appendix B (Informative) Layout of Grouting Holes and Scope of Grouting Treatment 9 B.1 Principle of grouting hole arrangement 9 B.2 Grouting hole arrangement 9 B.3 Scope of grouting treatment 9 Reference 11

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Coal Industry Association. This document is under the jurisdiction of the Science and Technology Development Department of China Coal Industry Association. This document is drafted by. Huaihe Energy Western Coal and Electricity Group, Ordos Huaxing Energy Co., Ltd., China Coal Industry Association Productivity Promotion Center, China University of Mining and Technology (Beijing). The main drafters of this document. Shu Yiguo, Gao Yingui, Liu Shiqi, Cheng Aimin, Zhai Enfa, Yang Yang, Ma Jiguo, Kong Wanjun, Zheng Houfa, Yin Hongchang, Zheng Jinyue, Guo Qing, Huang Lei, Guan Hongwei, and Lei Feng. Exploration and Treatment of Water Conductivity of Underground Faults in Coal Mine specifications

1 Scope

This document stipulates the exploration of water conductivity of coal mines, the treatment of water-conducting faults in coal mines, and the inspection of grouting effects of underground water-conducting faults in coal mines. and other technical requirements. This document is applicable to the exploration and control of water conductivity of underground faults in coal mines.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. MT/T 632-1996 Technical specification for downhole exploration and release of water NB/T 51030-2015 Code for construction and acceptance of grouting engineering in coal mine roadway working face

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Orifice safety device orificesafetydevice It is installed at the hole of the drilled hole, connecting the grouting pipeline inside and outside the hole, the spreader, the mixer, and the sum of the devices to prevent the slurry from flowing out of the hole and backflow. 3.2 When dividing the rock formation that needs grouting into several sections and grouting in sequence, the grouting length of each section. 3.3 Diffusionradiu Taking the grouting hole as the center, the radial outward diffusion of the grout meets the effective distance of grouting control. 3.4 The pressure of the input grout at the grouting orifice at the end of the designed grouting. 3.5 At the end of grouting, the grouting orifice inputs the flow rate of the slurry. 4.Water conductivity exploration of underground faults in coal mines 4.1 General provisions 4.1.1 When the fault is detected in advance in the excavation face, the relevant regulations and measures shall comply with the relevant provisions of the "Detailed Rules for the Prevention and Control of Water in Coal Mine". ......

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