Coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and preparing method thereof

Abstract

The invention discloses a coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and a preparing method thereof. The grouting material is characterized by comprising, by weight, 60 parts of coal gangue powder, 25 parts to 30 parts of ordinary portland cement and 10 parts to 15 parts of clay in a mixing-grinding mode, wherein the size of particles of the coal gangue powder obtained before mixing is smaller than 45 un. According to the coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and the preparing method, on the basis that high-pressure-bearing limestone at a specific-depth portion of a coalmine is reconstructed, coal gangue is sufficiently used for reducing the cost of the grouting material; the clay is a raw material low in price and easy to get, the requirements for the indexes of the grouting material are met while cost is saved, the waste coal gangue of the coalmine can be sufficiently used for treating an Ordovician-limestone water partition layer accordingly, the grouting treatment cost can be effectively reduced, the enterprise income can be increased, and the mine-lot ambient environment can be easily improved.

Description

technical field [0001] The present invention relates to grouting materials. Background technique [0002] Ordovician limestone refers to Ordovician limestone. The Ordovician limestone in the earth's crust has a large number of water storage caves, and some coal mines have been threatened by Ordovician limestone for a long time. When the Austrian ash water is at a high level, it flows into the coal mine working face through the authigenic fissures and the mining fissures of the water-resisting layer, causing well flooding accidents. The current treatment method is to grout the Austrian ash floor to seal the cracks. In the existing floor grouting project, the grouting material generally adopts single-liquid cement slurry and clay-cement mixed slurry, wherein the cement-clay slurry material has a cement content of 40% and a clay content of 60%. For large-scale grouting projects carried out by coal mining enterprises, especially in the grouting reconstruction project of high-...

AI Technical Summary

Problems solved by technology

Abandoned gangue, as the main process waste of coal enterprises, accumulates in large quantities around coal enterprises, causing serious pollution and harm to the environment, and at the same time bringing about many problems such as land occupation and waste of resources.