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Title: Corner-cutting mining assembly

Abstract

This invention resulted from a contract with the United States Department of Energy and relates to a mining tool. More particularly, the invention relates to an assembly capable of drilling a hole having a square cross-sectional shape with radiused corners. In mining operations in which conventional auger-type drills are used to form a series of parallel, cylindrical holes in a coal seam, a large amount of coal remains in place in the seam because the shape of the holes leaves thick webs between the holes. A higher percentage of coal can be mined from a seam by a means capable of drilling holes having a substantially square cross section. It is an object of this invention to provide an improved mining apparatus by means of which the amount of coal recovered from a seam deposit can be increased. Another object of the invention is to provide a drilling assembly which cuts corners in a hole having a circular cross section. These objects and other advantages are attained by a preferred embodiment of the invention.

Inventors:
Issue Date:
OSTI Identifier:
6356307
Application Number:
ON: DE83010467
Assignee:
EDB-83-072610
DOE Contract Number:  
AC01-78ET10041
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 42 ENGINEERING; AUGER MINING; MINING EQUIPMENT; DESIGN; COAL MINING; EQUIPMENT; MINING; 012000* - Coal, Lignite, & Peat- Mining; 420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)

Citation Formats

Bradley, J.A. Corner-cutting mining assembly. United States: N. p., 1981. Web.
Bradley, J.A. Corner-cutting mining assembly. United States.
Bradley, J.A. Wed . "Corner-cutting mining assembly". United States.
@article{osti_6356307,
title = {Corner-cutting mining assembly},
author = {Bradley, J.A.},
abstractNote = {This invention resulted from a contract with the United States Department of Energy and relates to a mining tool. More particularly, the invention relates to an assembly capable of drilling a hole having a square cross-sectional shape with radiused corners. In mining operations in which conventional auger-type drills are used to form a series of parallel, cylindrical holes in a coal seam, a large amount of coal remains in place in the seam because the shape of the holes leaves thick webs between the holes. A higher percentage of coal can be mined from a seam by a means capable of drilling holes having a substantially square cross section. It is an object of this invention to provide an improved mining apparatus by means of which the amount of coal recovered from a seam deposit can be increased. Another object of the invention is to provide a drilling assembly which cuts corners in a hole having a circular cross section. These objects and other advantages are attained by a preferred embodiment of the invention.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {7}
}