Location

Rolla, MO

Session Start Date

6-11-1999

Session End Date

6-17-1999

Keywords and Phrases

Risk Assessment; SPONCOM; Gob

Abstract

Expert systems for SPONCOM risk assessment ·are used for choosing suitable fire-proof mining systems and ventilation schemes. Some of them can even estimate the effectiveness of planned ventilation and specific anti-fire measures for SPONCON risk reduction as early as at the design phase. The method proposed herewith is appropriate for operative evaluation of SPONCM risk in gob areas for the following three phases during longwall development: design stope, the commencement of production, and during production. Data from mine and model experiments and statistical data for the actual coal seams serve as a basis for defining index of relative SPONCOM risk throughout gob areas. Two very important problems can be solved with this method: (1) operational - tracing of hypothetical SPONCOM zones alongside gob area when some combustive products of low oxidation are observed in the outflowing stream. Most probable SPONCOM zones are determined via streamlines of air leakage and risk distribution; (2) preventive -planning of target anti-fire measures for effective SPONCOM risk reduction in the most dangerous zones. Application of the proposed method is illustrated with real data from operating retreat longwalls. Such a system implies the greatest difficulties in tracing dangerous zones. Influence of nitrogen injection on dangerous SPONCOM zones is also shown.

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

Method for Operative Prediction of SPONCOM Hazard in Gob Area

Rolla, MO

Expert systems for SPONCOM risk assessment ·are used for choosing suitable fire-proof mining systems and ventilation schemes. Some of them can even estimate the effectiveness of planned ventilation and specific anti-fire measures for SPONCON risk reduction as early as at the design phase. The method proposed herewith is appropriate for operative evaluation of SPONCM risk in gob areas for the following three phases during longwall development: design stope, the commencement of production, and during production. Data from mine and model experiments and statistical data for the actual coal seams serve as a basis for defining index of relative SPONCOM risk throughout gob areas. Two very important problems can be solved with this method: (1) operational - tracing of hypothetical SPONCOM zones alongside gob area when some combustive products of low oxidation are observed in the outflowing stream. Most probable SPONCOM zones are determined via streamlines of air leakage and risk distribution; (2) preventive -planning of target anti-fire measures for effective SPONCOM risk reduction in the most dangerous zones. Application of the proposed method is illustrated with real data from operating retreat longwalls. Such a system implies the greatest difficulties in tracing dangerous zones. Influence of nitrogen injection on dangerous SPONCOM zones is also shown.