slips joints etc in underground mining

 Shear-slip induced seismic activity in underground mines: a ...
Shear-slip induced seismic activity in underground mines: a ...

seismic activity recorded in the vicinity of the shear structure as mining advanced ... Barton and Choubey (1977) studied the behaviour of natural rock joints and proposed ... N - block identification number - also defines colour 1,6,11 etc. ... blue..algo-title-news{font-size:18px;font-weight:normal;color:#1603a1;line-height:23px;text-decoration:none} Subsidence Mechanism and Stability Assessment ... - MDPI https://www.mdpi.com/2071-1050/10/1/113/pdf [//]6 Jan

Get price
 Study on the Process and Mechanism of Slope Failure ...
Study on the Process and Mechanism of Slope Failure ...

Even to this day, surface deformation caused by underground mining is still one of the most ... There are three dominant groups of joints in each type of rock mass in the study area. ... Obvious relative displacement caused by shear slip failure...

Get price
 Evaluation of the Effect of Fault on the Stability of ...
Evaluation of the Effect of Fault on the Stability of ...

26 Dec 2018 ... ... different geological discontinuities such as faults, folds, slips, joints, etc. ... the effect of the fault on the stability of underground coal mines by...

Get price
 Causes of Falls of Roof - CSIR Research Space
Causes of Falls of Roof - CSIR Research Space

Ineffective joint support was found to be a dominant cause of roof falls for all thickness ... performance of support elements, unknown nature of the stress regime, etc. ... coalfield where most of the underground coal mining is being carried out. There ... A general investigation of the surrounding area, including slips and faults,...

Get price
 Safety and health in underground coalmines - ILO
Safety and health in underground coalmines - ILO

27 Jan 2009 ... on Safety and Health in Coal Mines, held in Geneva from 8 to. 13 May 2006. ... system requires joint commitment between the competent author- ity, employers, workers and their ... Slips, trips and falls are a common hazard in coalmin- ing. Walkways ... wireless communications technology, etc. – should be...

Get price
 Expansion Joints, Slip Joints | Schlumberger
Expansion Joints, Slip Joints | Schlumberger

Expansion and slip joints accommodate tubing movement, expansion, and contraction without loss of pressure integrity, even in HPHT environments.

Get price
 best practice rock engineering handbook - SANIRE
best practice rock engineering handbook - SANIRE

underground mining extraction excavations (stopes), and ... Loose open joints, heavily jointed or ―sugar-cube‖ etc (any depth). 5.0. Notes: ... shear slips, water seepage lines, zones of differing consistency or grading (this changes the.

Get price
 Glossary of Mining Terms - Kentucky Coal Education
Glossary of Mining Terms - Kentucky Coal Education

Back - The roof or upper part in any underground mining cavity. Backfill – Mine ... The main set of joints along which coal breaks when mined. Clean Air Act...

Get price
 Mining Industry - IMIA
Mining Industry - IMIA

Underground mining requires shafts, tunnels, roads and working galleries underground and ... circumstances existing underground for the coal seams or the shape of ore body and the ... of metallurgy, construction materials, chemical, and mining, etc. ... region – a factor that further contributed to the material slipping.

Get price
 2 Rock Engineering & Design
2 Rock Engineering & Design

continuous miner from exposed seams at the base of open pit or strip ... highwall or underground mining. ... easily and the machine also tends to sink or slip on ... etc. Although great attention is paid to penetration rate wear of drill steel and bits...

Get price
 Strength-stress ratio on joints in 3DEC | US Minneapolis ...
Strength-stress ratio on joints in 3DEC | US Minneapolis ...

In 3DEC, it is easy to see if joints have failed by plotting Joints – Slip. This will plot small cubes at each subcontact colored by their state (slipping, slipped in past,...

Get price
 Slippery Surfaces - Health and Safety Authority
Slippery Surfaces - Health and Safety Authority

Some factors may be particular to individual workplaces. Consider any other factors that could affect slip risk such as hot oil, level changes, etc. Deep Fat Fryer...

Get price
 Joint (geology) - Wikipedia
Joint (geology) - Wikipedia

A joint is a break (fracture) of natural origin in the continuity of either a layer or body of rock that ... Finally, joints often form discontinuities that may have a large influence on the mechanical behavior (strength, deformation, etc.) ... Extensional tectonics · Divergent boundary · Back-arc basin · Intra-arc basin · Strike-slip tectonics...

Get price
 Roof Instability - NCBI - NIH
Roof Instability - NCBI - NIH

What Reportable Noninjury Roof Falls in Underground Coal Mines Can Tell Us ... An external file that holds a picture, illustration, etc. ... The roof is generally weak due to the presence of slip planes, slickensides, clays and siltstones...

Get price
 Mine Safety and Health Administration (MSHA) - PROP ...
Mine Safety and Health Administration (MSHA) - PROP ...

underground coal mines due to falls of roof or rib (including coal outbursts). ... slips, joints, and fossils, one can see why roof control is the most challenging safety ... decisions involving the mine design issues (pillar size, direction of mining, etc.)...

Get price
 Study of Tunnel Damage Caused by Underground Mining ...
Study of Tunnel Damage Caused by Underground Mining ...

The underground mining subsidence has led the tunnel cracked seriously in three ... The movement made the tunnel deformation joints join together and caused the ... involves civil engineering, underground coal mine, rock mechanical, etc.

Get price
 Management of Rockfall isks in Underground Metalliferous Mine
Management of Rockfall isks in Underground Metalliferous Mine

Background "The Australian Underground Mining Environment" . ... performance, shear slip, etc. ROCKFALL ... and induce slipping along joints followed by a.

Get price
 Serviceability analysis of deep underground openings driven ...
Serviceability analysis of deep underground openings driven ...

In mining and tunnelling fields, the stability of underground excavations is ... (e.g., stability graph method based on rock mass classification systems, etc.) ... Eq. (1) gives the critical dip angle of joints (βw) at which rock will slip along them.

Get price
 support of underground excavations in hard rock - MIRARCO ...
support of underground excavations in hard rock - MIRARCO ...

and support mechanisms for underground mines. ... F. Sandy particles, clay-free, disintegrating rock etc. 4.0. 25 - 30 ... Over-consolidated, slips, joints and minor.

Get price
 Rock Mechanics - Mining and Blasting
Rock Mechanics - Mining and Blasting

may involve both strain localisation and joint slip, suggesting mitigation of this per- ... Significant improvements in ground control practice in underground mines are ... x , etc. The line element joining P and Q then changes length in the process....algo-title-news{font-size:18px;font-weight:normal;color:#1603a1;line-height:23px;text-decoration:none} Footwall Stability in SLC Mining - Publications http://ltu.diva-portal.org/smash/get/diva2:1137054/FULLTEXT01.pdf

Get price
 Proceedings of the International Workshop on Rock Mass ...
Proceedings of the International Workshop on Rock Mass ...

31 May 2007 ... Rock Mass Classification in Underground Mining. Edited by Christopher ... CMRR adjust- ment. Multiple discontinuities (joints, slip planes, etc.).

Get price
 Shear-slip induced seismic activity in underground mines: a ...
Shear-slip induced seismic activity in underground mines: a ...

seismic activity recorded in the vicinity of the shear structure as mining advanced ... Barton and Choubey (1977) studied the behaviour of natural rock joints and proposed ... N - block identification number - also defines colour 1,6,11 etc. ... blue..algo-title-news{font-size:18px;font-weight:normal;color:#1603a1;line-height:23px;text-decoration:none} (PDF) Impact of Geological Discontinuities on Underground ... https://www.researchgate.net/publication/320058618_Impact_of_Geological_D

Get price
 PROJECT WORK Guidance of - Core
PROJECT WORK Guidance of - Core

Jharia, East and West Bokaro, North and South Karanpura, Sohagpur, etc should be ... faults, slips, slickensides, joints and cleats, whereas thinly bedded strata and ... Features that lead to typical problems in underground coal mining include;.

Get price
 Geologic Hazards and Roof Stability in Coal Mines - CDC stacks
Geologic Hazards and Roof Stability in Coal Mines - CDC stacks

Roof fall caused by large joints spaced 6-10 ft and overspanned intersection. ... The U.S. underground coal miner faces a continuing hazard from the fall of roof. ... ministration (MSHA) are numerous references to "slips," ... horsebacks, etc.

Get price
 Slope Stability Assessment and Underground Mine Design ...
Slope Stability Assessment and Underground Mine Design ...

The Achilo-Sombo mine is an underground conventional coal mine first of its ... data related to coal seams location, depth of seams, seam thickness etc was ... normal faults (trending ENE-WSW, E-W, and N-S), strike slip faults, columnar joints,.

Get price
 Evaluation of the Effect of Fault on the Stability of ...
Evaluation of the Effect of Fault on the Stability of ...

... by different geological discontinuities such as faults, folds, slips, joints, etc. ... It is found during underground mining activities that many instability problems of...

Get price
 (PDF) Impact of Geological Discontinuities on Underground ...
(PDF) Impact of Geological Discontinuities on Underground ...

27 Oct 2017 ... Faults with an increased frequency of joints and cleats, slips and slickenside play a ... Keywords— Geological discontinuities, Underground coal mining ... commonly covered with more recent deposits of soils, clay, sand etc.

Get price
 support in underground hard rock mines - Rocscience
support in underground hard rock mines - Rocscience

Underground mines use two principal types of rock reinforcement - tensioned ... intersecting joints and bedding planes in the rock or they may have been created by poor quality ... anchor slips or the bolt breaks, the capacity of the bolt drops to zero and the rock ... rock and should be used in long-term openings (ramps etc.).

Get price

24/7 Service

We have set up a team with hundreds of technical engineers to resolve a series of problems during project consultation, on-site surveys, sample analysis, program design, installation, commissioning and maintenance guidance.