Project 3
Technology and equipment to improve the efficiency of degassing of coal seams to ensure safe coal mining in difficult mining and geological conditions
Technology and equipment to improve the efficiency of degassing of coal seams to ensure safe coal mining in difficult mining and geological conditions
"Coal mining and processing"
GOAL
Development of a methodology for predicting and managing the geomechanical condition of the rock massif during the formation and manifestation of dynamic precipitation of the main roof and its preventive hydraulic treatment in order to avoid dynamic and gas-dynamic phenomena
INTENDED OUTCOMES
- A set of technologies and means of their realization, increasing the efficiency of coal mining and ensuring a high level of industrial safety, has been developed and substantiated
- The system of assessment and control of the processes of rock mass management and degassing intensification by methods of directional hydraulic fracturing of the roof and interval hydraulic fracturing of the coal seam to exclude dynamic and gas dynamic phenomena was formed
EXECUTORFederal
research center
of Coal and Coal Chemistry SB RAS
ЗАКАЗЧИКАО "Coal Company
"Northern Kuzbass
The results of 2022
- Justification of technology and equipment to improve the efficiency of degassing of emission-prone coal seams to ensure safe coal mining in difficult mining and geological conditions is given. To prevent dynamic phenomena in mines, unique explosionless technologies for roof management, their timely artificial collapse, forced landing are proposed: the method of directional hydraulic fracturing of the roof and the method of interval hydraulic fracturing of the coal seam
- The mathematical model of numerical calculation of coal massif fracture by interval hydraulic fracturing has been developed and the numerical calculation of coal massif fracture by interval hydraulic fracturing with its use has been carried out. Analytical dependences determining the parameters of the technical device for interval fracturing of the coal seam, providing a given direction of development of fractures by interval fracturing by creating additional tangential stresses on the walls of the borehole and ensuring the development of the area of inelastic deformations in the borehole
- The composition and technical characteristics of technological equipment for directional fracturing of hard-to-collapse roof and interval fracturing of coal seam are determined
- Technological schemes of the method implementation for controlled roof collapse in complex-mechanized cleaning faces and preparatory workings were developed