Filling rate design and control method for solid filing in coal mining

Abstract

The invention discloses a filling rate design and control method for solid filing in coal mining, and belongs to filling rate design and control methods in cut and fill. The filling rate design and control method includes firstly, acquiring a theoretical design value phi of a solid filling coal mining filling rate according to cut and fill objectives and control objects; comprehensively analyzing influences of main controlling factors including key filling equipment, working face arrangement, solid filling materials, mining geological conditions and cut and fill integrated technologies on the filling rate to design an engineering control value of the filling rate phi0; during engineering practice, mounting a roof dynamic monitoring device in a gob to acquire measured filing rate curves phi(L) of different advancing positions of an on-site working face through actual measurement; comparing the engineering control value phi0, and adjusting the technology and the management method to ensure a measured filling value to meet engineering design requirements and guarantee filling effect. The method provides reference for design and control of the solid filling coal mining filling rate, and provides theoretical support for on-site popularization and application of the solid cut and fill technology.

Description

technical field [0001] The invention relates to a design and control method of filling rate in mining, in particular to a design and control method of solid filling rate in coal mining. Background technique [0002] The basic principle of solid filling coal mining technology is to use special filling equipment such as filling coal mining hydraulic supports and porous bottom unloading conveyors to backfill solid materials such as gangue and fly ash into the goaf, and use the tamping mechanism to make it a The dense filling body with a certain bearing capacity can replace the coal body management roof in the original space, and can slow down the movement of the overlying strata and the subsidence of the ground surface to varying degrees. It has its special technical advantages in many practical mining problems such as coal mining under buildings, coal mining under water bodies, prevention and control of rock pressure, treatment of solid waste, that is, gangue without raising t...

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Problems solved by technology

[0002] The basic principle of solid filling coal mining technology is to use special filling equipment such as filling coal mining hydraulic supports and porous bottom unloading conveyors to backfill solid materials such as gangue and fly ash into the goaf, and use the tamping mechanism to make it a The dense filling body with a certain bearing capacity can replace the coal body management roof in the original space, and can slow down the movement of the overlying strata and the subsidence of the ground surface to varying degrees. It has its special technical advantages in many practical mining problems such as coal mining under buildings, coal mining under water bodies, prevention and control of rock pressure, treatment of solid waste, that is, gangue without raising the well, and recovery of room-type coal pillars. At present, for solid filling and filling There is no set of accurate and comprehensive treatment methods for the design and control of the coal mining rate, and the mitigation degree of the overlying strata in the stope is determined by the filling rate, which is a key indicator that needs to be controlled in the application process of solid filling coal mining technology; therefore, for different According to the purpose and control object of filling mining, it is of great significance to study a set of accurate and practical filling rate design and control methods for the popularization and application of solid filling mining technology in coal mine engineering sites

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