Underground mining of thick coal seams

被引：0

作者：

Kumar Rakesh ^{[1
]}

Singh Arun Kumar ^{[1
]}

Mishra Arvind Kumar ^{[2
]}

Singh Rajendra ^{[1
]}

机构：

[1] Central Institute of Mining and Fuel Research (CIMFR, under CSIR)

[2] Indian School of Mines (ISM)

来源：

International Journal of Mining Science and Technology | 2015年 / 25卷 / 06期

关键词：

Thick coal seam; Single lift depillaring of total thickness; (SLDTT); Extraction height; Pillar instability; Caving of coal;

D O I：

暂无

中图分类号：

TD823.253 [];

学科分类号：

081901 ;

摘要：

This paper reviews underground mining methods for total thickness of a thick coal seam in single lift(TTTCSSL). Review shows the required engineering for extraction of thick seams needs to be fitted with thickness of the seam, behavior of rock-mass and surrounding stress conditions for efficient mining.Variants of TTTCSSL are able to extract a maximum 10–12 m thickness only. An improvement in bending moment of the overlying coal band in longwall top coal caving(LTCC) provides better under-winning opportunity for the roof coal band. An acceptable limit of 25 MPa compressive strength of coal for the success of LTCC may be increased under favorable geo-technical conditions. Bord and pillar in India adopted induced caving of roof coal band for single lift depillaring of total thickness(SLDTT) of a competent thick coal seam developed along floor. Case studies are given to arrest the adverse effects of extraction height on pillars.

引用

页码：885 / 896

页数：12

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