KA/T 9-2023 in English
VALIDTest method for coal mine groundwater connectivity tracing
- Issued on:2023-10-26
- Implemented on:2024-01-31
- File Format:PDF
- Delivery:Via email within 1~3 business days
$117.00
| Standard No: | KA/T 9-2023 |
| Document status: | VALID |
| Title in English: | Test method for coal mine groundwater connectivity tracing |
| Title in Chinese: | 煤矿地下水连通示踪试验方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2023-10-26 |
| Implemented on: | 2024-01-31 |
| ICS Classification: | 73.020-Mining and quarrying |
| Chinese Classification: | D14-Hydrogeological survey |
| Professional Classification: | KA- |
| Related Keywords: | fluorescence spectrophotometer field test calculation formula tracer dosage formula
standard test phase critical control points test method field test hydraulic gradient control coal mine groundwater tracer |
| Related Topics: | piv tracer
pts tracer Coal mine groundwater level Tracer test experimental method |
本文件规定了无机离子或染色试剂示踪类地下水连通试验的试验前准备工作、示踪剂选择、现场试验以及资料整理分析的要求。
本文件适用于矿区水文地质勘查工作。
Introduction
Interpretation of the core content of the standard
| Test phase | Critical control points | Technical indicators | Compliance requirements |
|---|---|---|---|
| Preliminary preparation | Integrity of hydrogeological data | ≥10 types of basic drawings | Approval by the chief engineer |
| Tracer selection | Environmental compatibility testing | 7 selection criteria | NB/T 35113 |
| Field test | Hydraulic gradient control | 1.5 times the borehole volume | Formula (1)-(3) |
Analysis of key technical points
Tracer selection criteria
The standard clearly requires that tracers must meet the dual indicators of environmental safety and detection sensitivity:
- Inorganic ions: Cl⁻ detection limit ≤0.1mg/L
- Fluorescent dyes: require detection using fluorescence spectrophotometer
Field test calculation formula
Tracer dosage formula: m = (k×w)/(λ×j)×10⁻⁹
The security factor k is 2-5, which reflects the complexity of the hydrogeological conditions in the mining area.
Suggestions for the implementation of the standard
Optimization of experimental design
- The placement point should give priority to the advantageous runoff channels such as fault fracture zones
- The receiving point should adopt conductivity meter to monitor the background value fluctuation in real time
- It is recommended to increase the tracer recovery rate assessment index
Response to common problems
| Problem type | Solution | Standard basis |
|---|---|---|
| Tracer not detected | Check the quality of well washing at the placement point | Clause 6.1.1b |
| Detection data abnormality | Review background value measurement record | Clause 6.2.1a |
Standard evolution analysis
This standard establishes a complete technical system for coal mine groundwater tracer testing for the first time. Compared with traditional methods:
- Added fluorescent dye tracer detection specifications
- Introduced quantitative calculation formulas (1)-(3)
- Specified test report preparation template
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