A support pillar mining method, and more particularly, a support pillar mining method allows for the selective mining of an identified segment in a support pillar. The method includes the steps of (i) cutting, in the support pillar, a removable segment with a saw; (ii) retaining, in the support pillar, a support portion extending from a foot wall to a hanging wall; and (iii) removing, from the support pillar, the cut removable segment wherein the support portion extending from the foot wall to the hanging wall supports the hanging wall after the cut removable segment has been removed from the support pillar.

There are provided a method for the bottom-side separation of a body which is to be worked out of rock (2000), in which a first part of the bottom surface of the body to be worked out of the rock (2000) is separated by removing the rock (2000) situated below the bottom surface, and a second part of the bottom surface is separated by replacing rock (2000) situated below the bottom surface with a layer system (140, 240, 440, 540) which has two unconnected separating layers (141, 142, 241, 242, 441, 442, 541, 542, 1310, 1320), with the result that the body to be worked out of the rock (2000) is supported in the region of this second part of its bottom surface by the layer system (140, 240, 440, 540), and a system (1000), which is suitable for carrying out such a method, for the bottom-side separation of a body to be worked out of a rock (2000), having an advancing unit (1100) for removing a rock layer, a discharge conveying unit (1200) for conveying away rock (2000) removed by the advancing unit (1100), a laying unit (1300) for laying a first separating layer (1310) and a second separating layer (1320) not connected to the first separating layer (1310), and a filling unit (1400) having at least one concrete feeder (1410) for filling the interspace between the bottom (1421) of the space, which is created by the removal of the rock layer, and the first separating layer (1310) with concrete, having at least one concrete feeder (1430) for filling the interspace between the roof (1441) of the space, which is created by the removal of the rock layer, and the second separating layer (1320) with concrete, and having a formwork (1450).

There are provided a method for the bottom-side separation of a body which is to be worked out of rock (2000), in which a first part of the bottom surface of the body to be worked out of the rock (2000) is separated by removing the rock (2000) situated below the bottom surface, and a second part of the bottom surface is separated by replacing rock (2000) situated below the bottom surface with a layer system (140, 240, 440, 540) which has two unconnected separating layers (141, 142, 241, 242, 441, 442, 541, 542, 1310, 1320), with the result that the body to be worked out of the rock (2000) is supported in the region of this second part of its bottom surface by the layer system (140, 240, 440, 540), and a system (1000), which is suitable for carrying out such a method, for the bottom-side separation of a body to be worked out of a rock (2000), having an advancing unit (1100) for removing a rock layer, a discharge conveying unit (1200) for conveying away rock (2000) removed by the advancing unit (1100), a laying unit (1300) for laying a first separating layer (1310) and a second separating layer (1320) not connected to the first separating layer (1310), and a filling unit (1400) having at least one concrete feeder (1410) for filling the interspace between the bottom (1421) of the space, which is created by the removal of the rock layer, and the first separating layer (1310) with concrete, having at least one concrete feeder (1430) for filling the interspace between the roof (1441) of the space, which is created by the removal of the rock layer, and the second separating layer (1320) with concrete, and having a formwork (1450).