发明名称 |
Non-entry mining method equipment |
摘要 |
A jet boring pre-assembly for excavating an underground area susceptible to disaggregation and for control from a working gallery below the area includes a cutting head for the top of the assembly, the cutting head having separate conduits for delivery of high pressure cutting fluid to high pressure nozzles, and a low pressure flushing fluid to flushing nozzles. A dual conduit drilling rod is located in a borehole beneath the cutting head, the rod having separate conduits for delivery of the high pressure and low pressure fluids to the cutting head. A preventor box below the cutting head seals the borehole and transmits slurry of excavated material to an outlet.
|
申请公布号 |
US5498068(A) |
申请公布日期 |
1996.03.12 |
申请号 |
US19950388338 |
申请日期 |
1995.02.14 |
申请人 |
INGERSOLL-RAND COMPANY |
发明人 |
PUTZER, RUEDIGER;NARCY, JEAN L. |
分类号 |
E21B43/29;(IPC1-7):E21C25/60;E21C45/00 |
主分类号 |
E21B43/29 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|