| Patents for E21C 39 - Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools (220) |
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| 07/05/2007 | US20070151345 Blast Movement Monitor |
| 04/03/2007 | CA2313884C Method for characterization of rock strata in drilling operations |
| 03/20/2007 | US7192092 Method and means for recovering hydrocarbons from oil sands by underground mining |
| 02/14/2007 | CN2869321Y Coal mine stope face pressure testing device |
| 01/24/2007 | CN2861486Y Down-well tunnel ignitor |
| 12/21/2006 | WO2006134223A1 Method and apparatus for ore processing |
| 12/21/2006 | CA2609931A1 Method and apparatus for ore processing |
| 12/13/2006 | CN2846755Y Tunnel top plate lithologic detector for mine |
| 11/21/2006 | CA2456506C Electronic core orientation device |
| 10/04/2006 | EP1095205B1 Method of determining in-situ stresses in an earth formation |
| 09/21/2006 | WO2006097095A1 Mining device |
| 09/06/2006 | CN1828016A Bipolar-bipolar detection method for mine working face floor strata |
| 08/16/2006 | CN1818337A Testing method and apparatus for geological mechanics parameter under coal mine |
| 08/09/2006 | CN1268939C Sensor for detecting magnetic-field in underground casing area |
| 08/01/2006 | US7082812 Method and device for evaluating physical parameters of an underground reservoir from rock cuttings taken therefrom |
| 06/27/2006 | US7066019 Cavity stability prediction method for wellbores |
| 06/07/2006 | EP1664672A2 Geosteering detectors for boring-type continuous miners |
| 05/17/2006 | CN1773077A Lithologic density logging instrument |
| 02/08/2006 | CN1731177A Method for determination of engineering rock mass damage |
| 12/08/2005 | WO2005012944A3 Geosteering detectors for boring-type continuous miners |
| 11/10/2005 | WO2005106200A1 Mining apparatus equipped with ash analyzer and control system |
| 07/07/2005 | WO2005061836A1 Trenchless pipe laying method and device |
| 06/30/2005 | DE10356696B3 Verfahren und Vorrichtung zur grabenlosen Verlegung von Rohrleitungen Method and apparatus for grave loose laying of pipelines |
| 02/10/2005 | WO2005012944A2 Geosteering detectors for boring-type continuous miners |
| 02/10/2005 | CA2783273A1 Geosteering detectors for boring-type continuous miners |
| 02/10/2005 | CA2534439A1 Geosteering detectors for boring-type continuous miners |
| 02/03/2005 | US20050023881 Geosteering detectors for boring-type continuous miners |
| 01/26/2005 | CN1570602A Method and device for evaluating physical parameters of an underground reservoir from rock cuttings taken therefrom |
| 01/20/2005 | US20050012499 Blast movement monitor and method for determining the movement of a blast movement monitor and associated rock as a result of blasting operations |
| 11/04/2004 | US20040220783 Method for determining and evaluating removal methods and device for carrying out said method |
| 10/28/2004 | US20040211252 Method and device for evaluating physical parameters of an underground reservoir from rock cuttings taken therefrom |
| 10/13/2004 | EP1466077A2 Method for determining and evaluating removal methods and device for carrying out said method |
| 09/02/2004 | US20040168358 Underground utility detection system |
| 08/12/2004 | WO2003001032A8 Method for determining and evaluating removal methods and device for carrying out said method |
| 05/19/2004 | CN1497267A Sensor for detecting magnetic-field in underground casing area |
| 03/09/2004 | US6701647 Subsurface imaging system and method |
| 01/29/2004 | DE19842975B4 Geoelektrisches Vorauserkundungsverfahren für maschinelle und konventionelle Tunnel- und Hohlraumvortriebe und Messvorrichtung dazu Geoelectrical advance exploration methods for mechanical and conventional tunneling and underground tunneling and measuring apparatus therefor |
| 01/29/2004 | DE10231780A1 Vorrichtung zur Durchführung seismischer Untersuchungen Apparatus for carrying out seismic surveys |
| 01/22/2004 | DE10231779B3 Vorrichtung zur Positionierung eines mit wenigstens einem seismischen Sensor versehenen Messkopfes An apparatus for positioning a provided with at least one seismic sensor measuring head |
| 07/22/2003 | US6597178 Sensor for detecting the magnetic field in the area of downhole casing |
| 04/24/2003 | US20030074812 Subsurface imaging system and method |
| 02/05/2003 | EP1281816A2 Excavator data acquisition and control system and process |
| 01/16/2003 | WO2002075361A3 Geosteering of solid mineral mining machines |
| 01/03/2003 | WO2003001032A2 Method for determining and evaluating removal methods and device for carrying out said method |
| 12/24/2002 | US6497457 Drilling, image, and coal-bed methane production ahead of mining |
| 12/12/2002 | US20020185906 Drilling, image, and coal-bed methane production ahead of mining |
| 12/03/2002 | US6490527 Method for characterization of rock strata in drilling operations |
| 11/27/2002 | EP0830522B1 Excavator data acquisition and control system and process |
| 11/12/2002 | US6477795 Excavator data acquisition and control system and process |
| 09/26/2002 | WO2002075361A2 Geosteering of solid mineral mining machines |
| 09/26/2002 | CA2441621A1 Geosteering of solid mineral mining machines |
| 07/03/2002 | CN1357078A Method and device for determining previous state of stress for tunneling |
| 05/14/2002 | US6386297 Method and apparatus for determining potential abrasivity in a wellbore |
| 01/30/2002 | EP1175551A1 Method and device for determining a previous state of stress for tunneling |
| 10/18/2001 | WO2001077490A1 Underground mining sampler |
| 10/10/2001 | CA2305960A1 Underground mining sampler |
| 09/27/2001 | DE10008450C1 Test drilling to assess the risk of a rock fall at a coal mine uses high pressure water jets to drill into the mine seam with measurements of at least one drilling parameter to be correlated with the level of danger |
| 07/11/2001 | EP1114336A2 Geoelectric pre-prospecting method |
| 06/20/2001 | CN1067455C Excovator data acquisition and control system and process |
| 05/02/2001 | EP1095205A1 Method of determining in-situ stresses in an earth formation |
| 04/05/2001 | WO2001023709A1 Position determining device and method |
| 04/05/2001 | CA2385762A1 Position determining device and method |
| 03/21/2001 | EP1085347A2 Apparatus and method for generating seismic vibrations |
| 03/15/2001 | DE19944032A1 Vorrichtung und Verfahren zur Erzeugung seismischer Schwingungen Apparatus and method for generating seismic vibrations |
| 03/06/2001 | US6195922 Excavator data acquisition and control system and process |
| 01/04/2001 | WO2001000962A1 Cavity stability prediction method for wellbores |
| 10/12/2000 | WO2000060214A1 Method and device for determining a previous state of stress for tunneling |
| 10/12/2000 | CA2369020A1 Method and device for determining a previous state of stress for tunneling |
| 09/19/2000 | US6119376 Excavator data acquisition and control system and process |
| 08/31/2000 | WO2000050735A1 Method and apparatus for determining potential abrasivity in a wellbore |
| 08/17/2000 | WO2000017489A3 Geoelectric pre-prospecting method |
| 04/27/2000 | DE19842975A1 Geoelektrisches Vorauserkundungsverfahren für Hohlraumvortriebe Geoelectrical preliminary exploration method for cavity headings |
| 03/30/2000 | WO2000017489A2 Geoelectric pre-prospecting method |
| 01/13/2000 | WO2000001927A1 Method of determining in-situ stresses in an earth formation |
| 11/18/1999 | DE19914973A1 Process for determination of the earlier forces acting on an area or mountain or earth prior to boring of a tunnel or similar |
| 03/31/1999 | EP0830522A4 Excavator data acquisition and control system and process |
| 10/20/1998 | US5824912 Method of determining stresses in a model mine layout |
| 09/10/1998 | DE19707530A1 Verfahren und Vorrichtung zur Gewinnung von geologischer Information A method and apparatus for obtaining geological information |
| 09/03/1998 | WO1998038412A1 Method and device for obtaining geological information |
| 08/26/1998 | CN1191594A Excavator data acquisition and control system and process |
| 06/23/1998 | US5769503 Method and apparatus for a rotating cutting drum or arm mounted with paired opposite circular polarity antennas and resonant microstrip patch transceiver for measuring coal, trona and potash layers forward, side and around a continuous mining machine |
| 03/25/1998 | EP0830522A1 Excavator data acquisition and control system and process |
| 01/06/1998 | US5704142 Excavator data acquisition and control system and process |
| 08/26/1997 | US5659985 Excavator data acquisition and control system and process |
| 01/03/1997 | WO1997000389A1 Excavator data acquisition and control system and process |
| 01/03/1997 | CA2222448A1 Excavator data acquisition and control system and process |
| 12/27/1996 | WO1996041932A1 Method of roof control in an underground mine |
| 12/27/1996 | CA2224207A1 Method of roof control in an underground mine |
| 09/10/1996 | US5553407 Excavator data acquisition and control system and method of use |
| 06/05/1996 | CN1123862A Method and apparatus for exploration of earth layer in front of digging machine |
| 04/10/1996 | CN2224280Y Long-distance centralized monitoring device for rock breaking |
| 03/05/1996 | US5496093 Operating a continuous miner |
| 02/21/1996 | EP0697604A1 Method and system for ground recognition in front of an excavating machine |
| 01/25/1995 | CN1097839A Method of prediction of spraying of rocks in deposits |
| 01/05/1995 | WO1995000745A1 Method of predicting rock bursts in a rock seam |
| 01/05/1995 | CA2143315A1 Method for predicting outburst of seam rock |
| 05/10/1994 | US5310248 Automatic vein identifying method and follower apparatus for use in a robot mining system |
| 01/05/1994 | CN2152075Y Inspection instrument for borehole |
| 03/16/1993 | CA1314411C Material stress monitor |
| 11/06/1990 | US4968098 Coal seam discontinuity sensor and method for coal mining apparatus |