Research on mining technology of combined mining at large inclined angle "three soft" coal seam

That is to say,with the increased length in strike,improved mining technology,improved gateway layout,optimized production system and others,the mining rate in th.

According to the up an d down coal mining face features and the advanced experiences of the combined mining for seams with a closed distance at home and broad,the paper rationally set the mining technology and the alternate distance for the up and down seam mining.

The mining craft of longwall mining method has many characteristics.

This Paper introduces building situation of high output and high efficiency and remarkable technical financial result from 1992,it makes modernized mining craft and coal production develop to high output and efficiency and high safety and high reliability with new technolog

The choice principle of mining craft way is pointed out.

Multiple optimization method on mining technique of BAO-Yushan coal mine;

The paper shows the full mechanized technology is applied and researched in Handan mine area,improved the equipment,optimized the mining technique,gave full play to full mechanized efficienc

This article discussed the practice of technology system on safety and high efficiency from 6 aspects, including: synthetic control of gas, research of mining technique, new technique of supporting with bolts in coal roadways, new technique of geo-exploration, optimizing configuration of resource by adjusting work panels and faces, and building mines with high yield and high effect.

Current Situations and Development Trends of Oil Production Technology in Ansai Oilfield;

Because of the effect of offshore sand control equipment and the limit of oil production technology, the screen and circulation pack sand control technology, ESPCP.