A. STRETCH OF SYMMETRY
If the geophones can not be normal then the first alternative is created by the geophones extending symmetrically. In principle, the stretches geophones extending symmetrically with geophones normally, except that the distance between geophones is reduced, but the distance between geophones of one another should be the same.
Geophones extending the symmetry can be caused by trace near roads, rivers, canals or other causes that can cause geophones can not created normally. Lack of symmetry is caused geophones stretch more sensitive to noise and easier to detect than if the ground roll is created geophones normally.
C. STRETCH GROUP
Stretched geophones in the group is the last alternative if it is created can not be normal as well as symmetry. The cause of geophones in a group is created equal why geophones stretched symmetrically. Some of them because of the geophones located near roads, rivers or canals and the path also intersects the road, river or canal.
The stretch group is the most sensitive to noise from outside and the ground roll because the range between geophones is near. But the expanse was also more sensitive in the group receiving seismic vibrations.
The monitor records can be seen that the stretch of that in the group will produce a larger vibration amplitude and relatively longer in detecting vibration. Stretch parameter group is geophones planted in a circle with a diameter of a circle of 1 meter. Should be arranged in such a way that the distance between geophones at large.
River crossing, when the crossing is intersected by a river wide enough so that we can not connect to the cable link. Usually on the river there were traces of the dead because the trace is located in the middle of the river and not allowed to be compensated or offset. At the river crossing we use the transverse cable whose length can reach 200-300 meters. Cables transverse the link between the two LAUX each located on either side of the river opposite each other. Transverse cable is connected to the port transverse LAUX, if the transverse cables are connected with transverse left port on one LAUX, then on the other LAUX must be connected to be port right transverse.
Something very important and dangerous river crossings are in progress stretching transverse wires in the river, stretching transverse cable is to use a small boat. At the time of the appointment of cable wires often get caught in the riverbed. If this happens then the things that had to be done is to cut the transverse cable.
If the geophones can not be normal then the first alternative is created by the geophones extending symmetrically. In principle, the stretches geophones extending symmetrically with geophones normally, except that the distance between geophones is reduced, but the distance between geophones of one another should be the same.
Geophones extending the symmetry can be caused by trace near roads, rivers, canals or other causes that can cause geophones can not created normally. Lack of symmetry is caused geophones stretch more sensitive to noise and easier to detect than if the ground roll is created geophones normally.
C. STRETCH GROUP
Stretched geophones in the group is the last alternative if it is created can not be normal as well as symmetry. The cause of geophones in a group is created equal why geophones stretched symmetrically. Some of them because of the geophones located near roads, rivers or canals and the path also intersects the road, river or canal.
The stretch group is the most sensitive to noise from outside and the ground roll because the range between geophones is near. But the expanse was also more sensitive in the group receiving seismic vibrations.
The monitor records can be seen that the stretch of that in the group will produce a larger vibration amplitude and relatively longer in detecting vibration. Stretch parameter group is geophones planted in a circle with a diameter of a circle of 1 meter. Should be arranged in such a way that the distance between geophones at large.
RIVER CROSSING
River crossing, when the crossing is intersected by a river wide enough so that we can not connect to the cable link. Usually on the river there were traces of the dead because the trace is located in the middle of the river and not allowed to be compensated or offset. At the river crossing we use the transverse cable whose length can reach 200-300 meters. Cables transverse the link between the two LAUX each located on either side of the river opposite each other. Transverse cable is connected to the port transverse LAUX, if the transverse cables are connected with transverse left port on one LAUX, then on the other LAUX must be connected to be port right transverse.
Something very important and dangerous river crossings are in progress stretching transverse wires in the river, stretching transverse cable is to use a small boat. At the time of the appointment of cable wires often get caught in the riverbed. If this happens then the things that had to be done is to cut the transverse cable.
