E21D21/00 - CPC Classification Index

ClassID:

136171 ⎘

E21D21/00 - CPC Classification

Classification description:

Anchoring-bolts for roof, floor in galleries or longwall working , or shaft-lining protection

Sub-classes:

E21D21/0006 » {characterised by the bolt material} 52
E21D21/0013 » {Protection against corrosion} 6
E21D21/002 » {using explosives charges} 1
E21D21/0026 » {characterised by constructional features of the bolts} 73
E21D21/008 » {Anchoring or tensioning means} 149
E21D21/0086 » {Bearing plates} 47
E21D21/0093 » {Accessories} 55
E21D21/02 » having means for indicating tension 34

Recent Application in this class:

20250369336

2025-12-04

PROVIDING CONTROL INFORMATION

20210018315

2021-01-21

Anchor bolt length determination method based on monitoring of roof rock stratum horizontal extrusion force

20200088031

2020-03-19

Resin anchored rock bolt with a piercing end

20190277138

2019-09-12

Rock bolt

20190234724

2019-08-01

Non-destructive detection method and device of effective anchorage depth of full-length bonding anchor

20190153862

2019-05-23

METHOD AND SYSTEM OF COAL MINE ROOF STABILIZATION

20180202291

2018-07-19

Fractured roof 110 mining method entry-side anti-collapsed structure

20180202122

2018-07-19

Sectional modular large-deformation-resistant impact-resistant composite rock bolt and its assembling method

20180195389

2018-07-12

Anti-spalling blocking bar for large cross-section coal gallery excavation work surface and supporting method

#10

20180169841

2018-06-21

Mine drill system with adapter

#11

20170335537

2017-11-23

Self-boring anchoring device and method of installing such an anchoring device

#12

20170328698

2017-11-16

NON-DESTRUCTIVE DETECTION METHOD AND DEVICE OF EFFECTIVE ANCHORAGE DEPTH OF FULL-LENGTH BONDING ANCHOR

#13

20160348505

2016-12-01

Method and system of coal mine roof stabilization

#14

20160186563

2016-06-30

Self-undercut anchor system

#15

20150300168

2015-10-22

Method and system of coal mine roof stabilization

#16

20150292326

2015-10-15

Side-mounted bolt driver and method of driving rock bolts

#17

20150218947

2015-08-06

Method of operating a rock bolting machine

#18

20150117961

2015-04-30

Method and rock bolting rig for installation of a rock bolt

#19

20150104261

2015-04-16

KNOTTED MESH AS SUPPORTING MATERIAL IN MINES

#20

20150060158

2015-03-05

Multi-purpose machine chassis

#21

20150056023

2015-02-26

MINE ROOF AND RIB SUPPORT

#22

20150016894

2015-01-15

Setting tool and method for installing an anchor rod

#23

20140314503

2014-10-23

Grouting method for anchoring with polymer

#24

20140294514

2014-10-02

Screen-handling system and method of installing screening on a rock face

#25

20140227043

2014-08-14

Apparatus and method for installing ground anchoring systems

#26

20140119839

2014-05-01

Expandable mine bolt

#27

20130193744

2013-08-01

Apparatus for forming an underground tunnel

#28

20130121773

2013-05-16

ANCHORING DEVICE

#29

20130115013

2013-05-09

Constant-resistance large-deformation anchor rod

#30

20110297057

2011-12-08

High-strength anchor system, safe room bulkhead, and method of anchoring a support to mine strata

#31

20100284762

2010-11-11

Self-drilling fastening element

#32

20070000701

2007-01-04

Drill bit, a drill rod and a self drilling roof bolt

#33

12983088

2015-07-14

Method and system of coal mine roof stabilization