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Microseismic monitoring is an effective means of forecasting instabilities in ruptured rock masses during deep mining. Based on the complex geological conditions of a mine in Southwest China, a digital 24-channel microseismic monitoring system was established to monitor microseismic events during deep mining. In the monitoring period, the focal mec...
Contexts in source publication
Context 1
... the double-couple point source model and the three incidents of roof collapse, focal mechanism solutions were analysed for rock mass rupture instabilities. Rupture surface fault plane solutions were obtained from the three roof collapses, as shown in Figure 5, No. 1 (9 August, 2007). The descriptions of determining nodal planes, P, T, and N axis were given as follows. ...
Context 2
... B axis was located at the intersection of the fault and auxiliary planes. As shown in Figure 5, No. 1, the projection of the nodal plane was expressed by an FBCG arc; its strike is 39°, its dip is SE, and its dip angle is 40° (N40E). The pole of the nodal plane is at the point A, and the angle is 90° from the maximum arc FBCG. ...
Context 3
... P-axis is inclined at 45° with respect to the A and C axes and is in the tension quadrant. As shown in Figure 5 and Table 2, No. 1, the P-axis was determined by a strike angle of 150° and an elevation angle of 9°, and the T axis was determined by a strike angle of 36° and an elevation angle of 69°. It is usually assumed that the P axis is in the direction of the maximum compressive stress and that the T-axis corresponds to the direction of maximum tension. ...
Context 4
... microseismic events are often controlled by the secondary stress field, which is caused by the larger tectonic stress field and man-made excavation disturbances. As shown in Figure 5, for 9 August, 2007 (No. 1), the hypocenter coordinates are in the eighth small ore body and C 1 b rock formations boundaries. The dividing line has a strike angle of 27° and a dip angle of 60°. ...
Context 5
... stress and metallotectonic directions are the same. As shown in Figures 5 and 6, in which section A of No. 1 (9 August, 2007) is the FBCG nodal plane, focal mechanism solutions can predict accidents caused by the effects of human stoping. As shown in No. 3 of Figure 5 (12 September, 2007), focal mechanism solutions show that the strike direction of nodal plane A (FBCG) is 340°. ...
Context 6
... shown in Figures 5 and 6, in which section A of No. 1 (9 August, 2007) is the FBCG nodal plane, focal mechanism solutions can predict accidents caused by the effects of human stoping. As shown in No. 3 of Figure 5 (12 September, 2007), focal mechanism solutions show that the strike direction of nodal plane A (FBCG) is 340°. The nodal plane and the fault F4 are on the same plane, which has a strike of 333°. ...
Context 7
... the double-couple point source model and the three incidents of roof collapse, focal mechanism solutions were analysed for rock mass rupture instabilities. Rupture surface fault plane solutions were obtained from the three roof collapses, as shown in Figure 5, No. 1 (9 August, 2007). The descriptions of determining nodal planes, P, T, and N axis were given as follows. ...
Context 8
... B axis was located at the intersection of the fault and auxiliary planes. As shown in Figure 5, No. 1, the projection of the nodal plane was expressed by an FBCG arc; its strike is 39°, its dip is SE, and its dip angle is 40° (N40E). The pole of the nodal plane is at the point A, and the angle is 90° from the maximum arc FBCG. ...
Context 9
... P-axis is inclined at 45° with respect to the A and C axes and is in the tension quadrant. As shown in Figure 5 and Table 2, No. 1, the P-axis was determined by a strike angle of 150° and an elevation angle of 9°, and the T axis was determined by a strike angle of 36° and an elevation angle of 69°. It is usually assumed that the P axis is in the direction of the maximum compressive stress and that the T-axis corresponds to the direction of maximum tension. ...
Context 10
... microseismic events are often controlled by the secondary stress field, which is caused by the larger tectonic stress field and man-made excavation disturbances. As shown in Figure 5, for 9 August, 2007 (No. 1), the hypocenter coordinates are in the eighth small ore body and C 1 b rock formations boundaries. The dividing line has a strike angle of 27° and a dip angle of 60°. ...
Context 11
... stress and metallotectonic directions are the same. As shown in Figures 5 and 6, in which section A of No. 1 (9 August, 2007) is the FBCG nodal plane, focal mechanism solutions can predict accidents caused by the effects of human stoping. As shown in No. 3 of Figure 5 (12 September, 2007), focal mechanism solutions show that the strike direction of nodal plane A (FBCG) is 340°. ...
Context 12
... shown in Figures 5 and 6, in which section A of No. 1 (9 August, 2007) is the FBCG nodal plane, focal mechanism solutions can predict accidents caused by the effects of human stoping. As shown in No. 3 of Figure 5 (12 September, 2007), focal mechanism solutions show that the strike direction of nodal plane A (FBCG) is 340°. The nodal plane and the fault F4 are on the same plane, which has a strike of 333°. ...
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