Динамика отраженных сейсмических волн

Напряжение – деформация Stress - deformation
Elastic limit
Elastic
deformation
plastic yielding, afterflow
Break
transitional creep
steady-state creep
Break
Stress
Stress-displacement relation
Time-displacement relation

Напряжение – деформация Stress - deformation
Elastic limit
Elastic
deformation
plastic yielding, afterflow
Break
transitional creep
steady-state creep
Break
Stress
Stress-displacement relation
Time-displacement relation
Deformation
Time
Deformation
Dependencies between stress, deformation and time.

Взрыв в скважине Explosion in borehole

Взрыв в скважине Explosion in borehole
Seismic reflections amplitude depending on explosions depth in borehole (height in air).
Explosive charges (0.05-100 kg in weight) are placed usually inside the special boreholes
(shot hole) 10-15 cm in diameter and 10-100 m in depth. The shot hole must be deeper,
than the depth of weathering zone.
Height
Relative amplitude

Взрыв в скважине Explosion in borehole
Seismograms, demonstrating seismic reflections amplitude dependence on explosion depth in borehole.
Explosive charge is 0.05 kg in weight in both cases.
Surface explosion
Borehole explosion

Spherical divergence
Seismic time sections: a) raw; b) after band-pass filtering

Spherical divergence
Seismic trace: a) amplifying coff.=1; b) coff.=5; c) after amplitude correctionB(t) = A(t) * t

Коэффициенты отражения и прохождения. Обменные волны. Reflection and transmission. Converted waves.

Коэффициенты отражения и прохождения. Обменные волны. Reflection and transmission. Converted waves.

Уравнения Цеппритца. Cepprits equations.

Коэффициенты отражения и прохождения как функции от угла падения.
Reflection coefficient and transmission coefficient versus incidence angle.

Normal incidence case.

Normal incidence case.

Some examples of normal incidence coefficients

Some examples of normal incidence coefficients

Поглощение сейсмических волн.
Absorption of seismic waves.

Расчет синтетических сейсмограмм – модель.
Synthetic seismograms – model.

Расчет синтетических сейсмограмм – траектории лучей.
Synthetic seismograms – ray tracing.