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Solid Accurate Solutions |
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Stable Strata Consulting (Pty) Ltd |
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Stable Strata Consulting offers expert services in the following fields: |
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Service List |
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Coal pillars have to satisfy two criteria simultaneously: they must be strong enough to provide the necessary protection and they must be as small as possible to optimize reserve utilization. We are leaders in the field of pillar design. |
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Pillar Design |
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Falls of roof are still the single biggest cause of injury and fatalities in coal mines. Different types of roof require different approaches to support design. We developed different support design methods for different situations. |
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Roof Support Design |
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We developed methods to predict surface subsidence and the related elements of induced tilt and ground strain.as a result of high extraction mining methods. Our fundamental prediction method is unique to South Africa but can be adapted easily to any situation. |
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Subsidence Prediction |
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As time goes by, various undesired effects of mining, especially mining that was done in the days before sophisticated design methods were available, can manifest themselves. We have experience of handling these effects in South Africa and in France. |
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Long Term Surface Stability |
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The strength of a pillar begins to deteriorate the moment it has been created. We created the world’s first successful method to predict for how long pillars can be expected to be stable. |
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Long Term Pillar Stability |
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This is a much more common phenomenon than one would expect. In areas where high extraction mining (or even oil extraction) was practiced, the cracks surrounding the subsided area re-open after several years or even decades, resulting in pot holes of different dimensions. |
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Sub Surface Erosion |
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We developed a method of sizing pillars for secondary extraction making use of the concept of crush pillars. The crush pillars are stable during mining in their immediate vicinity, protecting crews, but fail soon after, preventing undesirable stress build-up. |
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Pillar Extraction Lay-out |
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Longwalling can be described as the prince of coal mining methods, characterized by high rates of production and high productivity. However, It is crucial for the face length to suit local geological conditions and for the chain pillars to be designed correctly. We use proven and sophisticated numerical methods to optimize the design. |
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Longwall Design |
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Special Projects Our real forte is in helping clients to do things that have not been done before, be it a new mining method, lay-out, support materials, etc. We have the experience and the design tools to know what has been tried and did not work, and more importantly, why it did not work. After so many years in practice, research and consulting, and having been to so many places, chances are that we’ve come across what you have in mind anyhow. It is in doing new things that the power of science really comes to the fore, pushing the limits, creating new frontiers……. |
