METHOD OF DETERMINATION OF TRUE INITIAL PRESSURE OF GAS IN GAS-SATURATED COAL SEAM

摘要

Use: the forecast vybroso- danger of coal seams. Purpose: To improve the accuracy and efficiency of determining the gas pressure due to the contact of the liquid in the chamber with the gaseous medium in the surrounding rock mass per zone boundary effect borehole. SUMMARY OF THE INVENTION: burits well (hole) at the depth at which to measure the gas pressure in the formation. Sealed metering chamber and derivative values ​​T measured steady pressure in the chamber. Determined the calculated gas pressure in the coal formation for the test shahtoplastov then m is produced in fluid flow metering chamber at a pressure equal to calculated. Fixed and varying the fluid pressure in the fall or rise of pressure is produced tons respectively reset or lifting the fluid pressure in the chamber to stabilize the values.