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本文介绍了波兰在井筒保护煤柱中的煤层开采方法。叙述了由于开采引起的岩层变形现象的动力过程特征。讨论了在井筒保护煤柱中采用冒落法的示范性开采,并对保护井壁的方法的可行性作出评价。从分析几例已采的井筒煤柱得出了一般性的结论,即当煤层位于井筒底部约100米以下时,采用冒落法开采井筒保护煤柱是可能的。但当煤层与井壁相交时,用冒落法开采井筒煤柱还缺少工业上应用的有代表性的实际成果。
This article describes the method of coal seam mining in the wellbore protection pillar in Poland. Describes the dynamic process characteristics of rock deformation caused by mining. The demonstration mining using the caving method in the wellbore protection pillar was discussed and the feasibility of the method of protecting the borehole wall was evaluated. A general conclusion is drawn from the analysis of several well-tapped wellbores that it is possible to employ caving methods to mine the wellbores when the coal seam is located about 100 meters below the bottom of the wellbore. However, when the coal seam intersects with the shaft wall, there is still a lack of representative practical results for the industrial application of the production of wellbore coal pillars by the caving method.