Inrush data requirements

• Inrush

The data requirements for using this app will vary based on information currently collected by each individual operation. The general data requirements can be broken into three main categories:

1. Design inputs
2. Observational data
3. Risk Management Data

Initial app set-up will be customised to each site and the general characteristics of each data category are summarized below.

Design imputs

(if not currently using the mXrap caving suite)

Configure the required survey and drawpoint parameters for the cave footprint.

Steps

1. Survey Tool - Import required surveys of extraction level. Decimation may be needed.
2. Collate drawpoint names, centroid (X,Y,Z) and drawbell name

Caution

Ensure that naming conventions are consistent across all data sources

Best practice

Surveys should have as few vertices as required to avoid excessive computation time.

Observational data

Collate and configure the app to handle the site available data. Each data source relating to a drawpoint must utilize the drawpoint name allocated in the design set-up stage. Where data is captured in spreadsheets, importing requires documents to be saved as .csv files.

Caution

Ensure that naming conventions for drawpoints are consistent across all data sources

Risk Management Data

• Site specific risk matrices
• Risk calculations relating to inrush management including:
  • Categories for fine material and risk rating
  • Moisture categories and risk rating
  • Categories for controls (e.g. automation, bunding) and associated risk reduction factors (if required)

Example calculations

Inherent Likelihood of an inrush event occurring

This risk calculation reflects the likelihood based on observations at the drawpoint and is calculated in this version of the app is shown below:

$Inherent\ Risk = Fragmentation\ score + Moisture\ score$

Fragmentation Ranking

Category	Description	Particle Size Criteria	Ranking Score
Coarse	Predominantly large material	< 30% of material is less than 5cm	1
Medium	Mixed particle sizes	30-70% of material is less than 5cm	2
Fine	Predominantly small material	> 70% of material is less than 5cm	3

Moisture Ranking

Category	Description	Observable Indicators	Ranking Score
Dry	No moisture present	No signs of moisture observed	1
Damp	Minimal moisture	Touch and slight colour change/smell	2
Dripping	Visible water drops	Water drips from material or brow beam	3
Flowing	Clear water flow	Clear water flowing from drawpoint	4
Inflow	Contaminated water flow	Muddy water flowing from drawpoint	5