Location
Rolla, Missouri
Session Dates
11 Jun 1999 - 17 Jun 1999
Keywords and Phrases
Longwall Top-Coal Caving; Thick Coal Seam; Mine Safety; Gas Emission And Outburst; Spontaneous Combustion; Dust Control
Abstract
Longwall top-coal caving technology has developed rapidly in China, in recent years. The application of longwall top-coal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 40%. Using standard longwall equipment, annual production can reach 3 million metric tons (Mt), and a maximum of 4.1 Mt has been obtained; many top-coal caving longwall working faces can obtain 200 tons per man-shift. Longwall top-coal caving is distinctly different from slice mining in thicken seam. Concerns of safety and productivity for this method have been raised in recent years. This paper will discuss the following: 1) how to recognize the law of firedamp emission, accumulation and outburst; 2) how to resolve the ventilation problem in a highly gassy working face; 3) how to recognize the law of spontaneous combustion of ignitable coal, and to avoid spontaneous combustion in gob area; and 4) How to control dust in longwall top-coal caving face.
Department(s)
Mining Engineering
Meeting Name
8th U.S. Mine Ventilation Symposium
Publisher
University of Missouri--Rolla
Document Version
Final Version
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Wu, Jian; Qin, Yueping; and Zhai, Minghua, "Mining Safety of Longwall Top-coal Caving in China" (1999). U.S. Mine Ventilation Symposium. 3.
https://scholarsmine.mst.edu/usmvs/8usmvs/8usmvs-theme2/3
Mining Safety of Longwall Top-coal Caving in China
Rolla, Missouri
Longwall top-coal caving technology has developed rapidly in China, in recent years. The application of longwall top-coal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 40%. Using standard longwall equipment, annual production can reach 3 million metric tons (Mt), and a maximum of 4.1 Mt has been obtained; many top-coal caving longwall working faces can obtain 200 tons per man-shift. Longwall top-coal caving is distinctly different from slice mining in thicken seam. Concerns of safety and productivity for this method have been raised in recent years. This paper will discuss the following: 1) how to recognize the law of firedamp emission, accumulation and outburst; 2) how to resolve the ventilation problem in a highly gassy working face; 3) how to recognize the law of spontaneous combustion of ignitable coal, and to avoid spontaneous combustion in gob area; and 4) How to control dust in longwall top-coal caving face.
