Effects of panel mining sequence and retreat direction on the roof stability of longwall headgate entries

被引：0

作者：

Chen, JS ^{[1
]}

Mishra, M ^{[1
]}

DuBois, G ^{[1
]}

DeMichiei, J ^{[1
]}

机构：

[1] Cyprus Amax Coal Co, Penn Serv Corp, Waynesburg, PA 15370 USA

来源：

17TH INTERNATIONAL CONFERENCE ON GROUND CONTROL IN MINING, PROCEEDINGS | 1998年

关键词：

D O I：

暂无

中图分类号：

R1 [预防医学、卫生学];

学科分类号：

1004 ; 120402 ;

摘要：

The major functions of longwall headgate entries are to provide access ways to the outby submains or mains for coal transportation and to the longwall face for fresh air and for transporting men and material during longwall operations. Any roof control problems such as cutter roofs or roof falls in the outby headgate entries could result in significant production delays to the longwall face and may be a threat to miners' safety. Under a thinly laminated immediate roof and a high horizontal stress field, even a longwall headgate entry that has an angle of less than 45 degrees to the maximum horizontal stress may experience roof deterioration in the outby headgate if the longwall panel mining sequence and retreat direction are not properly considered. This paper attempts to analyze the causes of the roof control problems experienced in the longwall gate entries at our Cumberland and Emerald mines in Pennsylvania and to determine the optimal longwall panel mining sequence and retreat direction for the future mining area at Cumberland.

引用

页码：95 / 101

页数：7