Microorganism modification filling coal mining method

Abstract

Provided is a microorganism modification filling coal mining method. The microorganism modification filling coal mining method includes the steps that filling materials on the ground are calcificatedby microorganisms, the calcificated filling materials are transported to a goaf to be compacted, the goaf is filled with the calcificated filling materials, then, microorganism grouting is conducted on a filling body, and after coal mining within each step is completed, microorganism grouting filling is carried out. The microorganism modification filling coal mining method is easy to implement andenvironmentally friendly; by the adoption of microorganism filling, the compressive strength of the filling body is effectively improved; a new trend is provided for biochemical-mechanism-based microorganism filling coal mining technologies under deep high-stress conditions.

Description

technical field [0001] The invention relates to a microbial modified filling coal mining method, which belongs to the technical field of solid filling coal mining. Background technique [0002] With the increase of mining depth, the deep mining of coal resources is gradually going deep. For the deep mining environment, the filling body is fully compacted and the roof subsidence is further increased, resulting in poor filling effect and violent movement of the roof strata. It is necessary to improve the filling material to deal with the problems caused by high ground stress and high osmotic pressure. [0003] In order to adapt to the deep mining environment, the filling material is prepared and improved by microbial solidification. Microbial solidification, that is, microbial-induced calcium carbonate precipitation technology, is a new type of soil solidification technology. Its principle is to provide nitrogen sources and calcium ion sources to some specific microorganisms,...

AI Technical Summary

Problems solved by technology

For the deep mining environment, the filling body is fully compacted and the roof subsidence is further increased, resulting in poor filling effect and violent movement of the roof strata. It is necessary to improve the filling material to deal with the problems caused by high ground stress and high osmotic pressure.

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