GB1570473A – Underground mining machine
– Google Patents
GB1570473A – Underground mining machine
– Google Patents
Underground mining machine
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Info
Publication number
GB1570473A
GB1570473A
GB3671/78A
GB367178A
GB1570473A
GB 1570473 A
GB1570473 A
GB 1570473A
GB 3671/78 A
GB3671/78 A
GB 3671/78A
GB 367178 A
GB367178 A
GB 367178A
GB 1570473 A
GB1570473 A
GB 1570473A
Authority
GB
United Kingdom
Prior art keywords
roof
boom member
mine
mining machine
boom
Prior art date
1977-02-01
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3671/78A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Mine Service Co
Original Assignee
National Mine Service Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1977-02-01
Filing date
1978-01-30
Publication date
1980-07-02
1978-01-30
Application filed by National Mine Service Co
filed
Critical
National Mine Service Co
1980-07-02
Publication of GB1570473A
publication
Critical
patent/GB1570473A/en
Status
Expired
legal-status
Critical
Current
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Classifications
E—FIXED CONSTRUCTIONS
E21—EARTH DRILLING; MINING
E21C—MINING OR QUARRYING
E21C27/00—Machines which completely free the mineral from the seam
E21C27/20—Mineral freed by means not involving slitting
E21C27/24—Mineral freed by means not involving slitting by milling means acting on the full working face, i.e. the rotary axis of the tool carrier being substantially parallel to the working face
E—FIXED CONSTRUCTIONS
E21—EARTH DRILLING; MINING
E21C—MINING OR QUARRYING
E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 – E21C33/00, E21C37/00 or E21C39/00
Description
PATENT SPECIFICATION
( 11) ( 21) Application No 3671/78 ( 22) Filed 30 Jan 1978 ( 31) Convention Application No.
764632 ( 32) Filed 1 Feb 1977 in ( 33) United States of America (US) ( 44) Complete Specification published 2 July 1980 ( 51) INT CL 3 E 21 C 35/00 ( 52) Index at acceptance E 1 F 3 AX ( 72) Inventors: MAURICE K LEBEGUE CHARLES R HERRON ( 54) AN UNDERGROUND MINING MACHINE ( 71) We, NATIONASL MINE SERVICE COMPANY, a corporation organised and existing under the laws of the State of West Virginia, United States of America, of 4900/600 Grant Street, Pittsburgh, Pennsylvania 15219, United States of America, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:-
This invention relates to an underground mining machine having a boom operable to be raised and carrying a material dislodging apparatus at its free end for cutting into the mine face.
Mining machines are utilized in underground mining operations to continuously dislodge solid mineral material from the face of the mine shaft Generally, a boom member extends forwardly from an elongated body portion of the mining machine that is propelled through the mine on endless crawler tracks The boom member is pivotally connected to the mining machine body portion and rotatably supports a material dislodging apparatus, such as a drum member having peripherally extending cutting elements The drum member extends transversely to the longitudinal axis of the body portion and upon rotation the cutting elements dislodge solid material from the mine face The drum member is raised to a pre-selected vertical height in the mine as determined by the thickness of the mineral vein The drum member is rotated and sumped into the mine face with the drum member positioned adjacent the mine roof.
Once the drum member has advanced into the mine face, the boom member is pivoted downwardly to move the drum member vertically downwardly through the face to make a shear cut in the face The dislodged material is gathered by a gathering device which moves the dislodged material rearwardly onto a conveyor that extends longitudinally on the mining machine to transport material toward the rear of the mining machine.
In conducting the downward shear cut by the drum it is desired to maintain the 50 peripheral cutting edge of the cutting elements disengaged from the mine roof so that the elements cut only the vertical mine face.
Positioning the cutting elements in cutting relation with the mine roof and the mine 55 face increases the load upon the motors that rotate the drum member when the drum member is sumped forwardly into the mine face adjacent the roof Furthermore, if the drum member is permitted to dislodge mat 60 erial from the mine roof during the sumping operation an irregular roof surface results.
An irregular roof surface presents considerable difficulty in the installation of mine roof bolts and other roof support apparatus 65 The drum member has a tendency when raised to the vertical position adjacent the mine roof for the sumping operation to move upwardly or climb the mine face into the roof as the drum member is sumped 70 inwardly If the cutter elements engage both the mine roof and face during the sumping operation, an additional load is placed on the drum motors that may result in damage to the motors 75 There is need in the operation of an underground mining machine to prevent cutting engagement of the material dislodging apparatus with the mine roof during the sumping operation adjacent the mine roof 80 The cutting elements of the material dislodging apparatus should be displaced from cutting engagement with the mine roof and the material dislodging apparatus should be prevented from climbing upwardly into the 85 roof during the sumping operation Furthermore, there is need to prevent vertical movement of the material dislodging apparatus beyond a preselected vertical height during the sumping operation and 90 1 570 473 1 570473 thereby form a mine roof of a substantially uniform height and free of undulations.
According to the present invention there is provided an underground mining machine comprising a mobile body portion, a boom member pivotally secured to the body portion and extending forwardly therefrom, a material dislodging apparatus rotatably mounted on the front of said boom member, cutting elements secured to said material dislodging apparatus and extending outwardly therefrom, stabilizing means pivotally connected to said boom member adjacent to said material dislodging apparatus for engaging the roof of a mine to maintain said cutting elements displaced from engaging the roof, and an actuator means connected to said stabilizing means and mounted on said boom member for raising said stabilizing means to a preselected height.
Preferably the actuator mechanism is operable upon actuation to pivot the stabilizing assembly on the boom member upwardly in a vertical arc to a preselected height above the boom member Preferably, the stabilizing assembly is positioned above the boom member at a height to prevent the circular cutting path of the material dislodging apparatus from intersecting the roof when the stabilizing assembly is positioned in abutting relation with the mine roof and the material dislodging apparatus is sumped into the mine face The actuator mechanism maintains the stabihizing assembly in abutting relation with the mine roof so that the mnaterial dislodging apparatus does not engage t Ile mine roof during the inward xurnpn
