发明名称 |
Apparatus for use in under-ground long wall mine workings |
摘要 |
The invention is concerned with underground mining equipment, primarily but not exclusively for the mining of coal by the system known as the "long wall system". Where a coal cutting machine is driven along the wall face by the use of a haulage chain anchored at opposite ends of the face, to avoid the problems associated with the establishment of slack chain behind the machine, take-up means is provided at at least the end of the working from which the machine undergoes a working traverse to remove material from the face. Control means is provided to render said take-up means operative, to take up the slack produced in the chain, during such a working traverse of the cutting machine, and to render the take-up means inoperative, to provide a substantially fixed anchorage on a return traverse of the machine. Preferably such take-up means is provided at both ends of the working.
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申请公布号 |
US4298231(A) |
申请公布日期 |
1981.11.03 |
申请号 |
US19800111631 |
申请日期 |
1980.01.14 |
申请人 |
SPENCE, ADAM M.;GOFF, JAMES R. |
发明人 |
SPENCE, ADAM M.;GOFF, JAMES R. |
分类号 |
E21C29/10;(IPC1-7):E21C29/10 |
主分类号 |
E21C29/10 |
代理机构 |
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主权项 |
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地址 |
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