| Patents for E21D 23 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor (3,544) |
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| 04/09/2014 | CN102536285B Bottom lifting mechanism for hydraulic bracket of thin coal bed |
| 04/03/2014 | WO2014047721A1 Drill and blast method and apparatus for the same |
| 04/02/2014 | CN203515637U Pilot-operated check valve for hydraulic support |
| 04/02/2014 | CN203515636U 200L/min reversing valve used for coal mine hydraulic support |
| 04/02/2014 | CN203515635U Combined filling hydraulic frame |
| 04/02/2014 | CN203515634U Integrated equipment for supporting and transporting longwall coal tailgate |
| 04/02/2014 | CN203515633U Novel supporting type bottom net laying bracket |
| 04/02/2014 | CN203515632U Novel supporting type roof net laying bracket |
| 04/02/2014 | CN203515631U Gangue entering preventing device with integral top-beam suspension hydraulic support |
| 04/02/2014 | CN203515619U Pushing one-way lock with rated flow being 200 L/min |
| 04/02/2014 | CN103696795A Operating valve liquid distribution plate with self-filtered feed-return liquid stopping function |
| 04/02/2014 | CN103696794A Support and winch integrated device |
| 04/02/2014 | CN103696793A Pseudo-oblique fully-mechanized coal mining hydraulic bracket |
| 04/02/2014 | CN102562110B Integrated hydraulic support of four-post paste filling supporting in thin coal seam |
| 04/02/2014 | CN102536312B Anchor rod transloading set |
| 04/02/2014 | CN102536289B Two-column shielding large-center distance and ultrahigh-working resistance hydraulic support for medium-thickness coal seam |
| 04/02/2014 | CN102536275B Manual reversing main operation valve for hydraulic support of thin seam |
| 04/02/2014 | CN102251774B Fully mechanized coal mining method combining steeply inclined long-wall drilling type coal mining machine with hydraulic shield type supports |
| 03/26/2014 | CN203499714U Airborne temporary support test bed |
| 03/26/2014 | CN203499713U Coal mine detachable type top beam hydraulic support |
| 03/26/2014 | CN203499706U Valve element assembly of reversing valve for coal mine fully-mechanized coal mining hydraulic support |
| 03/26/2014 | CN203495856U Lineation and splicing mould for hydraulic support base structure piece whole assembling and hydraulic support |
| 03/26/2014 | CN103670476A Soft starting valve |
| 03/26/2014 | CN103670475A Flexible guarding protection-assisting device for hydraulic support |
| 03/26/2014 | CN103670474A Thin coal seam hydraulic support system with alignment device |
| 03/26/2014 | CN103670457A Real-time monitoring system for hydraulic support on coal mine fully mechanized working face |
| 03/26/2014 | CN103670425A Excavating and supporting integrating method and carrying type lifting and transporting support manipulator for heading machine |
| 03/26/2014 | CN103670416A Method for rapidly and stably arranging equipment on fully mechanized coal mining face |
| 03/26/2014 | CN102587949B Pneumatic auxiliary bracket for roadway guniting |
| 03/26/2014 | CN102269648B Hydraulic support test bed and heightening method thereof |
| 03/20/2014 | US20140077580 Longwall mining roof supports |
| 03/19/2014 | CN203488194U Plug-in mounted type one-way lock |
| 03/19/2014 | CN103643991A Paste filling fully-mechanized coal mining device and method for support matching template |
| 03/19/2014 | CN103643980A Shield support for steep medium-thickness coal seam |
| 03/19/2014 | CN103643979A Hydraulic support used for roadway temporary support and erecting and use method of hydraulic support |
| 03/18/2014 | US8672414 Method for controlling longwall mining operations |
| 03/12/2014 | CN203476374U Hydraulic support electrohydraulic control system |
| 03/12/2014 | CN203476373U Hydraulic peristaltic self-moving temporary supporting device |
| 03/12/2014 | CN203476372U Hydraulic support with lengthened top beam |
| 03/12/2014 | CN203476371U Hydraulic support with side wall protection mechanism |
| 03/12/2014 | CN203476362U Hydraulic support with secondary side wall protection mechanism |
| 03/12/2014 | CN103628905A Hydraulic support traction, direction regulation and transportation device and using method thereof |
| 03/12/2014 | CN102383817B Hydraulic bracket for top coal discharging in low position |
| 03/12/2014 | CN102330561B Method for controlling protective plate |
| 03/05/2014 | CN203463134U Manual control valve of hydraulic support for fully-mechanized coal mining face |
| 03/05/2014 | CN203463133U Bottom lifting mechanism of hydraulic support for fully-mechanized coal mining face |
| 03/05/2014 | CN203463132U Crotch type base of hydraulic support for coal mines |
| 03/05/2014 | CN203463131U Tail beam coal caving mechanism of top coal caving hydraulic support |
| 03/05/2014 | CN203463130U Thin seam hydraulic support for coal mines |
| 03/05/2014 | CN103615276A Support electrohydraulic control system |
| 03/05/2014 | CN103615275A Top coal caving hydraulic support and special linkage control combination valve for same |
| 03/05/2014 | CN103615274A Mine slippage support with landing adjustable-angle stretchable grating type tail support |
| 02/26/2014 | CN203452822U Cable bracket special for end and fore support |
| 02/26/2014 | CN203452821U Hydraulic support connector and connecting body for conveyor and hydraulic support |
| 02/26/2014 | CN203452820U Hydraulic support top rubbing and support moving valve for coal mine |
| 02/26/2014 | CN203452819U Assembling and disassembling device for fully-mechanized coal mining support |
| 02/26/2014 | CN203452818U Push rod mechanism, hydraulic support and coal extraction device |
| 02/26/2014 | CN203452817U Coal mine hydraulic support bottom lifting device |
| 02/26/2014 | CN203452812U Hydraulic steering platform |
| 02/26/2014 | CN203452811U U-shaped clamp |
| 02/26/2014 | CN203452810U Base valve, double-telescopic stand column, hydraulic support and engineering machine |
| 02/19/2014 | CN203441515U Combined type hydraulic support provided with notch excavating machine |
| 02/19/2014 | CN203441509U Novel large-flow hydraulic control one-way valve |
| 02/19/2014 | CN103590847A Single stand column dual-moving hydraulic support and moving mechanism and moving method |
| 02/19/2014 | CN103590846A Method of verifying reasonable working resistance of working face hydraulic support |
| 02/19/2014 | CN102418542B Support control device for hydraulic support |
| 02/12/2014 | CN203430549U Rotatable waste rock blocking device |
| 02/12/2014 | CN203430511U Forepoling device of bolter-miner |
| 02/12/2014 | CN103573281A Hydraulic support electrohydraulic control system |
| 02/05/2014 | CN203420724U Stepping-type supporting device |
| 02/05/2014 | CN203420718U Hydraulic support emulsion extra-high pressure conveying connector special for mine |
| 02/05/2014 | CN103557024A Foldable direction-changing withdrawing platform |
| 02/05/2014 | CN103557023A Hydraulic bracket for extremely soft coal bed |
| 02/05/2014 | CN103557022A Large-mining-height hydraulic support capable of passing through small roadway |
| 02/05/2014 | CN103557021A Back-column-pulling-preventing limit device of support |
| 01/30/2014 | US20140030030 Mine bolter |
| 01/29/2014 | CN203412610U Hydraulic support for ultrathin coal seam |
| 01/29/2014 | CN203412609U Novel hydraulic bracket controller |
| 01/29/2014 | CN203412608U Support core type hydraulic bracket in coal mining and filling parallel operation |
| 01/29/2014 | CN203412607U Hydraulic support for realizing placing top coal and filling operation |
| 01/29/2014 | CN203412606U Spider type hydraulic bracket in parallel working of coal mining and filling |
| 01/29/2014 | CN203412605U Hydraulic support with side protection plate |
| 01/29/2014 | CN103541754A Coal mining face hydraulic support straightening system and straightening method |
| 01/29/2014 | CN103541753A Hydraulic support, side thrust mechanism of same and fully mechanized mining equipment |
| 01/29/2014 | CN103541752A Side guard plate synchronizing device |
| 01/29/2014 | CN103541751A Multifunctional coal mining hydraulic protection arm rake-mounting support device |
| 01/22/2014 | CN203403903U Temporary supporting and guarding device of cantilever heading machine |
| 01/22/2014 | CN203403902U Mobile device for speedy drivage |
| 01/22/2014 | CN103527235A Group self-organization cooperative control method of underground mining hydraulic support system |
| 01/22/2014 | CN103527234A Airborne temporary support test rig |
| 01/22/2014 | CN103527233A Fully-mechanized coal mining surface transportation crossheading supporting and transferring integrated equipment |
| 01/16/2014 | WO2014008716A1 Universal statically indeterminate hydraulic support |
| 01/15/2014 | CN203394561U Hydraulic support mounting and dismounting mechanism |
| 01/15/2014 | CN203394560U Pipeline system capable of implementing remote liquid supply of hydraulic bracket |
| 01/15/2014 | CN203394559U Support device for inclined coal seams |
| 01/15/2014 | CN203394558U Hydraulic bracket and backward pulling mechanism thereof |
| 01/15/2014 | CN103506814A Manufacturing method for valve element component |
| 01/15/2014 | CN102536314B Method for quickly lifting bottom on soft bottom combined mining working surface with large inclination angle |
| 01/15/2014 | CN102383816B Hydraulic support, connection mechanism of push rod of hydraulic support and connector, and fully-mechanized mining surface |
| 01/08/2014 | CN203383844U Hydraulic support column with external teeth serrated lock washer |