Location

Rolla, MO

Session Start Date

6-11-1999

Session End Date

6-17-1999

Keywords and Phrases

In-Situ Methane Monitoring; Continuous Miners; Methane Control Efficiency; Methane Safety Index

Abstract

Various methods have been derived to determine the effectiveness with which ventilation systems clears headings of methane in a bord-and-pillar sections. A problem with applying these methods in underground sections is that the either require the face-area air quantity to be measured, which is virtually impossible in South African collieries, or they were developed for test galleries, making it difficult to use in production sections. Taking this into consideration the methane safety index (MSI) method was developed. The method utilizes methane data recorded around an active continuous miner (CM) and an activity log of cm operations to quantitatively assess methane control. Factors used includes methane levels, trends in peak values and regulatory safety levels. With the aid of a spreadsheet a single number is calculated describing the methane clearing ability of a ventilation system. Advantages of MSI method is that there are three fixed and discrete categories of values, making interpretation easy. The method will also give reliable feedback were low methane levels are present and can be used to quantitatively asses how well a ventilation system coping with the methane load.

Department(s)

Mining and Nuclear Engineering

Appears In

U.S. Mine Ventilation Symposium

Meeting Name

8th U.S. Mine Ventilation Symposium

Publisher

University of Missouri--Rolla

Publication Date

6-11-1999

Document Version

Final Version

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 11th, 12:00 AM Jun 17th, 12:00 AM

A Proposed New Method to Determine the Effectiveness of In-Heading Methane Control

Rolla, MO

Various methods have been derived to determine the effectiveness with which ventilation systems clears headings of methane in a bord-and-pillar sections. A problem with applying these methods in underground sections is that the either require the face-area air quantity to be measured, which is virtually impossible in South African collieries, or they were developed for test galleries, making it difficult to use in production sections. Taking this into consideration the methane safety index (MSI) method was developed. The method utilizes methane data recorded around an active continuous miner (CM) and an activity log of cm operations to quantitatively assess methane control. Factors used includes methane levels, trends in peak values and regulatory safety levels. With the aid of a spreadsheet a single number is calculated describing the methane clearing ability of a ventilation system. Advantages of MSI method is that there are three fixed and discrete categories of values, making interpretation easy. The method will also give reliable feedback were low methane levels are present and can be used to quantitatively asses how well a ventilation system coping with the methane load.