The fully mechanized coal face, crossing the fault zones, would cause the roof soft or roof collapse if the ground control were not correct.

The way,selection of the roadway position and time,rules of the mine pressure appearance and roadway protective measures of no pillar actual mining at the combined mining face of the middle and thick seam in Xinji No.

Way of realizing high production and efficient in compound mining face with complex geology;

3 coal seam of 3405 compound mining face of Xiyu Coal Mine, and through comparison and selection, determines to adopt the anchor bolt support in through-cut on the compound mining face, makes the head support parameters design and head pressure monitoring, and expounds the construction points and supporting results.

On the basis of measurement result and statistical analysis of rock pressure characteristics,support working state and key links of mining coal technological system on wide fully mechanized coal face,the characteristics and the pattern of the original face and butt connecting wide face are discussed.

Study of fully mechanized mining face dust pollution status;

Comprehensive evaluation model for the safety of fully mechanized mining face based on unascertained measure and AHM;

The multi-level grey entropy comprehensive evaluation on safety of fully mechanized mining face;

Application of PROMOS monitoring control system in fully mechanized face;

The study on reliability of man machine environmentsystem of fully mechanized face based on neural network;

On the basis of realizing the gently inclined coal seam mining,the mining craft,technique research and feasibility of the 18～25° large inclined angle and down inclined fully mechanized face are further analyzed.