Geomechanics and mining

Contact: Dr. A. Stäubert
E-mail: GMBdont-like-spam.k-utec.de
Phone: + 49 3632 610 170
Fax: + 49 3632 610 105

Performance

Complex mining mechanical observation of mining activities and other cavities such as safety relevant solutions

• Identification of load behaviour through stress monitoring surveys by means of hydraulic fracturing
• Underground deformation observations
• Obtaining geotechnical data from inaccessible or displaced cavities
• Photographic documentation of rock mechanical relationships
• Assessment of the safety of miners' ascent routes
• Observation of tunnels including rock cavities
• Assessment of solution to hydrological problems as well as danger due to flammable gases
• Complex surveillance of mine areas
• Proof of the effect of filling and long-term geomechanical remote observation
• Scientific consultation during renovation and decontamination of old mines, geotechnical characteristics of filling

Filling test in a waste mine

Kali-Umwelttechnik Sondershausen GmbH succesfully applied the following three methods of land fill:

• On-site solidity investigations by means of static impression testing
• Rammsondierung according to mine technical standard DIN 4094
• Dynamic load pressure plate TB BF -StB, part B 8.3

Stress tests by means of hydraulic fracturing - in the framework of complex technical surveys and observation provide the guidelines for:

• proof of safety and surveillance of mines in the operational phase,
• mining dimension, management and extension surveys,
• closing down operations,
• safety analysis for the post-operational phase of mines,
• the proof of safety for further use as permanent storage places or underground dumps,
• validation of technical and economic projections for mining

Measuring system hydraulic fracturing		Plate loading test

Technology

• Required diameter:
  42mm or 46mm (special bore set)
• Measurable bore hole lengths:
  55m horizontal, 30m vertical at the ridges, 25m vertical on the level
• Working pressure:
  40...63MPa
• High performance sensor for pressure, volume and temperature measuring
• Digital data recording

Gas-salt-flow in a Carnallite working Additional liquid filling material

Reference

• Complex surveillance of the South Harz Potash district and further mining areas
  Mining Operations, Germany
• Systematic hydrofracture-stress test measurements in the permanent store for radioactive waste in Morsleben exploratory mining site Gorleben
  BGR Hannover, Germany
• Survey of the planned UTD Lower Rhine/ utilization of waste materials foreign to mining as fill material
  Solvay Salz, Germany
  GTS, Germany
  GSES, Germany
  NDH-E, Germany
  GVV, Germany
• Foreign Mining Consultation
  NISCO Dopolan, Iran
  SDD Djebel Djerissa, Tunisia
  URAL-KALI AG Berensniki, Russia