KA/T 3-2023 in English

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Standard No:	KA/T 3-2023
Document status:	VALID
Title in English:	Technical specification for drain of underground coal mine water during the period of production
Title in Chinese:	井工煤矿生产时期排水技术规范
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2023-10-26
Implemented on:	2024-01-31
Superseding:	MT/T 674-1997 Technical specification for drain of mine water during the period of production
ICS Classification:	73.020-Mining and quarrying
Chinese Classification:	D14-Hydrogeological survey
Professional Classification:	KA-
Related Keywords:	water pump mine water water inlets water hammer water level
Related Topics:	foreign mine water Same coal high-quality mine Coal mine water testing

本文件规定了生产矿井排水系统的基本规定、排水泵房、水仓、水沟、沉淀池、排水管路、排水设备、供配电、控制、照明、通信、地面排放与环保等技术要求。
本文件适用于井工煤矿生产时期的排水工作。

Introduction

Core changes in the standard revision

Technical elements	MT/T 674-1997	KA/T 3-2023	Key points of changes
Water tank capacity	Designed according to the normal water inflow of 4h	Graded design (1000m³/h as the boundary)	Add special design requirements for mines with complex hydrology
Water suction well arrangement	Filter spacing 2DN	Spacing ≥3.5DN	Optimize water flow pattern to prevent cavitation
Disaster resistance system	Not separately specified	Requirements for newly added independent water tanks	Must accommodate the maximum water inflow for 1 hour

According to GB/T 50451:

The foundation of the water pump is 50mm above the ground, and the spacing on the maintenance side is ≥700mm
Calculation formula for the diameter of the water distribution gate valve: DN≥27√Q (Q is the maximum flow rate in m³/h)
Temperature control ≤34℃, a cooling system must be installed if the limit is exceeded

The water inlets are arranged in a staggered manner, with a spacing ≥1.5 times the diameter of the water inlets
The bottom silt holding space is ≥0.5m, and a submersible mixer
The load-bearing beam needs to withstand a safety factor of 1.5 times the water hammer dynamic load

Transition from old to new systems: Existing MT/T 674-1997 equipment should complete compliance transformation by the end of 2024
Construction of disaster-resistant systems: Mines with complex hydrology need to complete the construction of independent drainage pipelines before 2025
Intelligent monitoring: It is recommended to configure an online monitoring system for multiple parameters such as water level, vibration, and temperature

This standard reflects three major technological trends:

Enhanced safety redundancy: Systematic design of disaster-resistant drainage system from scratch
Equipment adaptation optimization: Special specifications for new equipment such as submersible electric pumps
Strengthening energy efficiency control: Clarifying the hard indicator of power consumption of ≤0.5kW·h per ton of water per 100 meters

More samples: JJG 21-2008 DL/T 5154-2012 JC/T 2453-2018

Sample only — not a preview of KA/T 3-2023

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