GB/T 42867-2023Technical guidelines for comprehensive utilization of pre-drainage water (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

1 Scope

This document stipulates the general principles and technical requirements for the comprehensive utilization of coal mine pre-drainage.

This document is applicable to the comprehensive utilization of coal mine pre-drainage in the design and production stages, and other mines can refer to it for implementation.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 1576 Industrial boiler water quality

GB 5749 Hygienic Standards for Drinking Water

GB/T 11446.1 Electronic grade water

GB/T 12145 Water vapor quality of thermal power generating units and steam power equipment

GB/T 19223 Classification of coal mine water

GB/T 19772 Urban wastewater recycling and groundwater recharge water quality

GB/T 50050 Design specifications for industrial circulating cooling water treatment

GB/T 50562 Basic terminology standard for coal mine engineering

3 Terms and definitions

The following terms and definitions as defined in GB/T 19223 and GB/T 50562 apply to this document.

4 General principles

4.1 Through mine hydrogeological exploration, supplementary exploration, hydrogeological testing and water quality testing, find out the water quality and quantity of the pre-discharge target aquifer Condition.

4.2 On the premise of ensuring safe production and comprehensively considering water quality, technical feasibility and economic rationality, it is appropriate to pre-drain the main aquifers. See Appendix A for the pre-arrangement well information table.

4.3 Pre-drainage is given priority for self-use in the mining area, and based on water quality characteristics, priority is given to domestic drinking, industrial utilization and groundwater recharge (well irrigation).

4.4 When the pre-arrangement method is not selected, refer to GB/T 31392 for reuse.