Ground control inspection

• Name of the mine

• Operator of the mine

• Location of the mine
  Address

• Date of inspection

  Date

• Inspection done by

• Summary of the inspection

Stand up times

• Expected stand up time for stopes

• Expected stand up time for galleries

Calculation methods for support

• What kind of calculation method is used for the dimensioning of the support elements

• How is the support load and strength

• How is the factor of safety for the support elements determined

General information for timber support

• What is the average life time of timber

• What is the absolute and product specific consumption of the timber in the mine

• What is the average life time of timber in the stope?

General information about ground control

• How often are ground control inspections done?

• How often does rock and roof fall occur

• How often do damaged support elements have to be replaced

• Does the mine have a ground control and support plan

  Yes

  No

• Is this plan of adequate structure and of good quality

  Yes

  No

Ground support at the entrance of the mine

• How are the entrances of the mine protected against collapse or possible obstruction caused by slope slides or shaft caving?

• Does the support at entries show damage or is prone to be damaged?

  Yes

  No

General concept of ground control

• What is the general concept to manage ground stresses resulting from mining activities for mine preperation and development?

  Select Unsupported open stope Natural support/pillars Timber support Steel support Rock bolts Concrete Other

  • Unsupported open stope
  • Natural support/pillars
  • Timber support
  • Steel support
  • Rock bolts
  • Concrete
  • Other

• What is the general concept to manage ground stresses resulting from mining activities for stopes?

  Select Unsupported open stope Natural support/pillars Timber support Steel support Rock bolts Concrete Other

  • Unsupported open stope
  • Natural support/pillars
  • Timber support
  • Steel support
  • Rock bolts
  • Concrete
  • Other

Structural Pillars

• Are surface installations protected by structural pillars?

  Yes

  No

• Is there a plan for the recovery of the structural pillars?

  Yes

  No

• What is the ore extraction rate of the deposit with and without pillar recovery?

Subsidence

• Are there any indication for current or future subsidence?

  Yes

  No

• Does unplanned subsidence exist

  Yes

  No

• Is there a risk that the subsidence does harm to man-made surface installations or the environment?

  Yes

  No

• How is subsidence controlled and managed

Support elements condition

• What is the general condition of the support elements used in the stope?

  Select Very good Good Adequate Bad Very bad

  • Very good
  • Good
  • Adequate
  • Bad
  • Very bad

• Are support elements

  Select Functioning Damaged Deformend Loaded Overloaded Failed

  • Functioning
  • Damaged
  • Deformend
  • Loaded
  • Overloaded
  • Failed

• Fotos of the support elements

  Media

• Does the support have continuous contact with the roof and the side walls?

  Yes

  No

• What is the general condition of the support elements used in the galleries?

  Select Very good Good Adequate Bad Very bad

  • Very good
  • Good
  • Adequate
  • Bad
  • Very bad

Floor heaving and side wall conevergence

• Is the deformation in the openings everywhere under control or are there zones with increased floor heaving, roof and side wall convergence?

  Yes

  No

• Are there areas in the mine where there is floor heaving?

  Yes

  No

• Is in this case the floor supported?

  Yes

  No

Rock and roof fall hazard

• Does uncontrolled rock and roof fall hazard for mine workers exist?

  Yes

  No

• Do hazards exist in the active stopes and are indicators found for unplanned support element failure or probable rock and roof fall

  Yes

  No

• What indicators are there?

Timber condition in the mine

• Is the timber used in longliving openings treated in regard of the mine preparation and development?

  Yes

  No

• Is the timber preparation and treatment before its use adequate?

  Yes

  No

  N/A

• Does the inspection of the ground control system and the taken observations on the spot confirm the assumptions made in the ground control and support planning and is the safety standard with regard to ground control and support sufficient?

  Yes

  No

  N/A

• In the inspection visit of the mine are there observations of roof fall hazard or extraordinary deformation could happen?

  Yes

  No

• Existing risks due to support failure and high ground pressures

• Missing appropriate SOP for excavation in weak rock/soil

• The operation requires continuous dailycontrol of support elements and for indicators of accelerated ground movements

• Follow up by frequent safety inspections is required