The following research results are obtained: the top coal caving technique and increasing the resistance of the support can reduce the pressure on the coal wall.

5m thick and 21°～42° high inclination-angle,is mined with light top coal caving.

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.

The application of waterinjection soften process of π type steel caving coal;

Computer simulation research on working results of fully mechanized caving coal face;

Practice on the technology of large tilt angle compound mining caving coal;

Discussion on support and design of the powered support for the top-coal caving of up-dip mining face;

A study on top-coal caving technology in thick seams with fully mechanized face;

Analysis on technological transformation from flooring support to caving support;

The case of accidents,the proposed blasting mining roof caving face the basic requirements for control and prevention of incidents of roof effective measures,must learn.

ZF—4600 light caving supporter was tested successfuly in thick seem descending slicing face,whick supplied a new choice for the mining in similar face.

Scientific analysis on sublevel caving in thinner of the steep close and thick seam;

The numerical analysis on the stress distribution and the displacement of the top coal in sublevel caving mining;

App. of sublevel caving method with single hydraulic support;