REMNANT ROOF COAL THICKNESS MEASUREMENT WITH PASSIVE GAMMA-RAY INSTRUMENTS IN COAL-MINES

被引：45

作者：

BESSINGER, SL ^{[1
]}

NELSON, MG ^{[1
]}

机构：

[1] UNIV ALASKA,SCH MIN ENGN,FAIRBANKS,AK 99775

来源：

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 1993年 / 29卷 / 03期

关键词：

D O I：

10.1109/28.222427

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Current underground mining practice often requires that a predetermined amount of coal be left on the roof of the mined-out area. The need to leave such coal occurs on both continuous miner and longwall sections and is derived from considerations of ground control, quality control, machine guidance, or simply good operating practice. Efforts at measuring boundary coal thickness have been employed mechanical, nucleonic, and energy adsorption and reflection methods. The nucleonic methods have found application in operations in the United Kingdom, the United States, the former Soviet Union, and Poland. Natural gamma devices are currently the instrument of choice, and several successful installations exist. The calibration of natural gamma background (NGB) instruments must be carefully maintained, and they cannot be used in areas where a NGB radiation is not present. This radiation is ordinarily present in the fine-grained sedimentary rocks that bound many coal seams.

引用

页码：562 / 565

页数：4