Research and application of coal and gas outburst control measure based on hydraulic extrusion in roadway;

Protection against outburst mechanism of hydraulic extrusion measure in the front of coal road heading face;

Aim at the problems of coal and gas outburst,slowness of advancing,malajustment of exploitation and grubbing and strain of production in grubbing work-face,hydraulic extrusion has been applied in Dazhong mine of Anyang.

The depth of sealing hole is a very important factor in hydraulic screen;according to the condition of Sang Shu-ping coal mine,base the theoretically analyse and though the checkout,make sure the logical depth of sealing hole of hydraulic screen in Sang shu-ping coal mine,good effect was obtained,and carrying out rapid excavation.

In order to removing tunneling working surface outburst quickly and effectively,combine the Six Mineral coal beds characteristics,hydraulic pressing are taken to remove outburst measure.

Based on data gained from in - site , ANSYS finite element analysis software is used , numerical value simulation was carried out in stress distribution、mechanics property、 methane removal of coal body which is located in front of drivage face before and after taking hydraulic pressing measures.

According to a successful example of silent piling under high pressure ,this paper indicates that with the develepment of the high-energy silent piling machines and the effective anti-squeezing measures, there is a hope to reuse the reliable and economical precast concrete pile in the downtown area of Shanghai.

To control the investment efficiently,the corporation of this project Diverting Water from Xihe to Tanghe office efficiently controls the investment by taking powerful measures from the time .