Gavrilov V. Development of scientific and technical intensification principles of degassing tense gas-saturated coal layers with hydrodynamic impact

This study considers processes occurring in the stressed gas-bearing coal and rock mass at the hydrodynamic stimulation through the long underground holes. Work objective is the development of scientific and engineering basis for intensification of stressed gas-bearing coal seam degassing at the hydrodynamic stimulation through the long underground holes in order to enhance its efficiency and miners’ occupational safety. This study adopts integrated research technique including: theoretical research of geomechanics processes occurring in the coal and rock mass with the use of the strained bodies mechanics theory; mechanics of fluid and gas motion in the coal and rock mass; experimental investigations and production testing of the developed methods of coal seam degassing intensification involving statistical data processing method; mechanical and geophysical techniques of the underground instrumental measurements.The regularities of interaction geomechanical and hydrodynamic gas dynamic processes are found in action on the tight gas-saturated coal seams, and especially gas emission from coal seams in underground mining after maintenance; theways of intensification the drainage of shallow and steep seam through long underground wells are developed. Also, the effects of hydrodynamic effects on limiting sorption capacity of coal substance are determined. Criteria of efficiency methods degassing of coal seams hydrodynamic influence the formation of zones of intense gassing position number extracted from the well of coal, coal seam thickness, depth of its occurrence and spatial position of treated areas. Technological intensification schemes in drainage in mining of shallow and steep gas-saturated coal seams that involve the distribution in space and time processes and degassing of coal seams are developed. The new ways and methods of degassing of coal mining under intense array of gas-saturated steep and shallow coal seams are proposed. Practical cost advantages due to the application of the developed methods and operating procedures made over 9 million UAH.