The research and development project focused on the preconditions for directional drilling to improve methane extraction and to ensure higher safety in mining. The drilling technology had to be adapted to the seam contour. Selective drilling of boreholes up to 300 m long will improve the efficiency of methane extraction, thus reducing the methane concentration in mine air flow and enhancing the safety of mines.Ziel dieses Untersuchungs- und Entwicklungsvorhabens war es, mit geeigneter, leistungsfaehiger Bohrtechnik die Arbeitssicherheit im Grubengebaeude nachhaltig zu verbessern. Zentrale Elemente sind dabei die geeignete Gasvorabsaugung auch bei langen Streben und entsprehende staubmindernde Massnahmen durch Langfronttraenken. In diesem Un...
The longwall mining system with fall of the roof is still the most common hard coal extraction syste...
Prior to coal mining, boreholes are drilled into seams for impregnation and for methane removal. Mea...
Aus der Darstellung der technischen und wirtschaftlichen Rahmendaten der Druckluftversorgung im deut...
The research project 'drilling shafts as cutting element' has as its subject the question of the fea...
In the framework of the research and development project 'Investigation and Testing of Various Techn...
The project was funded by the German state of Nordrhein-WEstfalen. The ignition hazard and the dust ...
Die Berichte ueber aktuelle Projekte der Ruhrgas AG befassen sich mit folgenden Themen: Duekerung im...
Many mines were abandoned in the Ruhr district during the past decade. Methane is still released fro...
The investigations aimed at better ergonomy in mine stabilisation, e.g. dust reduction in concrete s...
The northward migration of hard coal mining and successive closure of mining pits in the Ruhr Distri...
Aim of partial project was the production of findings on the influence of drilling shafts as layout ...
The cost of piping considerably depends on the share of civil engineering works, i.e. on pavement sc...
Papers on various aspects of ''Prospecting and and Extraction'' were presented: Fracsimulation of na...
The presence of seam gas in the form of methane and carbon dioxide presents a hazard to underground ...
Das durchgefuehrte Forschungsvorhaben verfolgt zwei aufeinander aufbauende Zielsetzungen: Einmal die...
The longwall mining system with fall of the roof is still the most common hard coal extraction syste...
Prior to coal mining, boreholes are drilled into seams for impregnation and for methane removal. Mea...
Aus der Darstellung der technischen und wirtschaftlichen Rahmendaten der Druckluftversorgung im deut...
The research project 'drilling shafts as cutting element' has as its subject the question of the fea...
In the framework of the research and development project 'Investigation and Testing of Various Techn...
The project was funded by the German state of Nordrhein-WEstfalen. The ignition hazard and the dust ...
Die Berichte ueber aktuelle Projekte der Ruhrgas AG befassen sich mit folgenden Themen: Duekerung im...
Many mines were abandoned in the Ruhr district during the past decade. Methane is still released fro...
The investigations aimed at better ergonomy in mine stabilisation, e.g. dust reduction in concrete s...
The northward migration of hard coal mining and successive closure of mining pits in the Ruhr Distri...
Aim of partial project was the production of findings on the influence of drilling shafts as layout ...
The cost of piping considerably depends on the share of civil engineering works, i.e. on pavement sc...
Papers on various aspects of ''Prospecting and and Extraction'' were presented: Fracsimulation of na...
The presence of seam gas in the form of methane and carbon dioxide presents a hazard to underground ...
Das durchgefuehrte Forschungsvorhaben verfolgt zwei aufeinander aufbauende Zielsetzungen: Einmal die...
The longwall mining system with fall of the roof is still the most common hard coal extraction syste...
Prior to coal mining, boreholes are drilled into seams for impregnation and for methane removal. Mea...
Aus der Darstellung der technischen und wirtschaftlichen Rahmendaten der Druckluftversorgung im deut...