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CASE STUDY 03 · INTEGRATED MINING AND PROCESSING
Five phases to stop the spark underground
A continuous miner cutting coal can strike sparks in the one place methane gathers. We funded five phases of research to understand that ignition, and to stop it.
5 phases
from ignition science to prevention protocols
4 reports
plus a machine modification protocol and a checklist
2 fronts
stop the ignition, see the methane sooner
1 rule
the spark and the gas never meet
01
The problem
The spark nobody survives
When a continuous miner’s picks strike rock, they spark. When the seam releases methane at the same point, the section is one bad moment from an explosion. For decades the industry managed that moment with ventilation rules of thumb. Nobody had pinned down exactly how ignitions start at the cutting head, or what specifically stops them.
“Prevention of cutting head flammable gas ignitions on continuous miners.”
Project 2.9.6 Phase 4, final report, 2020
02
The research
Follow the gas to the pick
Phase one investigated how and where cutting-head ignitions actually occur, and what the rest of the world did about them. The phases that followed optimised methane control in the heading, then pushed monitoring technology closer to the pick, where the risk lives. Phases four and five delivered the practical end: a modification protocol for the machines themselves, a graphic checklist a section crew can hold, and the final report that ties five phases into one line of defence.
Coaltech Mining Committee
Oversight across all five phases.
CSIR and industry specialists
Ignition science, monitoring, trials.
Member collieries
The underground sections where it was proven.
5
phases of research, so that one spark never finds one pocket of gas.
03
The impact
Documents a miner can hold
Research that ends as a report on a shelf protects nobody. This programme ended as working paper: the modification protocol and the ventilation checklist are used at section level, and the monitoring work moved sensing toward the cutting zone. Underground coal mining will never be safe the way an office is safe. It is safer than it was, and this is part of why.
2015
Phase one
How ignitions occur at the head, and international practice, under Project 2.9.5.
2017
Phases two and three
Methane control in headings optimised. Monitoring technology advanced.
2020
Phases four and five
Prevention delivered: modification protocol, ventilation checklist, final report.
Today
At the face
The documents in use. The monitoring science carried into later safety work.
The evidence. Every claim traces to a published report.
PDFPreventing Methane Ignitions in Continuous Miner HeadingsWhat this report showsPhase 1: ignition science and international practice.2015Open in the Library → PDFPhase 2: Optimise Methane Control in CM HeadingsWhat this report showsVentilation and control in the heading.2017Open in the Library → PDFPhase 3: Advancing the Technology of Methane MonitoringWhat this report showsSensing closer to the point of risk.2017Open in the Library → PDFPhase 4: Prevention of cutting head flammable gas ignitionsWhat this report showsThe prevention findings and the modification protocol.2020Open in the Library → PDFPhase 5: Final report and graphic checklistWhat this report showsThe consolidated programme and the checklist crews use.2020Open in the Library → Where this goes next
The safety thread runs on through spontaneous combustion and the upgraded Kloppersbos explosibility laboratory. Related: SponCom. Kloppersbos.
