We present a 2D frequency-wavenumber constant-offset prestack time migration algorithm, which can not only make better imaging of reflectors with steep dips and preserve amplitudes correctly, but also has high computation efficiency.

The kernel point of the mountainous area high dip angle strata 3D seismic data processing is how to solve 3D reflection surface element divergence,to increase reflection surface element trace gather inphase stack.

Difficulties of mountain area high-dipping strata seismic data processing are from nonlinear coupling of dynamic correction size,statics size,and divergence of CMP channel set around the actual position of binning from larger amount of migration as well.

Study on stability technology of hydraulic support in fully-mechanized caving working face with large dip angle;

Vertical dip mining system for fully mechanized face under the condition of large dip angle (24°);

Aiming at the complex geologic condition in deep angle inclined top-coal wall,analyzed the reciprocity relationship of fully mechanized top-coal hydraulic support stress state and enclosing rocks under the condition of large dip angle,expatiated the effect on the capability of hydraulic powered support that the enclosing wall characteristic arousing.

Having taken high inclined angle 31502 working face fully mechanized top coal caving in Zhang Ji Mine of Kangbao Mining Company as object of study,this paper analyzes the complicated situation the 31502 fully mechanized top coal caving face will face,having taken specific measures and management methods to guarantee mining safely,providing methods for future mining and accumulating experience.

Through the research and analysis on 8256 light carving face support gliding caused by complicated geological structure,deep mining,and high inclined angle in Yangquhe Coal Mine,this paper provides a solution to the gliding of light caving support and ancillary equipment,improving the recovery rate of coal,providing a reference for future mining under similar conditions.

In view of the actual situation,through the transformation of the mechanical and electrical equipment,the adjustment of extraction technology and strengthening the management of safety production,we are successful in the elevated fully mechanized coal face high inclined angle .

Technical Research of Complicated Coal Seams with Deep Dip Angle;

Study the feasibility of the bolt support technology used in deep dip angle half-coal rock roadway in this paper,and analysis the effect on roadway's rock stress distribution and condition of maintenance when the vertex angle coal hold,finally,a bolting support design is suggested,and the research results have been applied to the project successfully.