Method for filling and constructing foam concrete in coal mine soft rock largely-deformed roadway supporter

Abstract

The invention relates to a method for filling and constructing foam concrete in a coal mine soft rock largely-deformed roadway supporter. The method comprises the following steps of paving and filling foam concrete from outside to inside along the roadway direction after an arched shed body is built completely; sequentially paving double-layer plastic nets and air tubing cloth at the outer side of the shed body; sectionally paving each unit from bottom to top, and binding the plastic nets with the shed body; arranging wood back plates and revivified anchor rods between the shed body and the plastic nets along the roadway direction so as to reinforce the shed body; filling a gap between the shed body and the roadway with wood plates or transverse braces; sealing two ends of the gap of each unit; conveying the foam concrete to the gap between the shed body and the roadway, and filling the gap with the foam concrete from bottom to top, wherein the filling height every time is 1-1.5 m; filling once every 2-3 m in the process of filling the middle top; performing guniting treatment at the inner side of the shed body from bottom to top, and paving and filling the next unit after the guniting treatment is finished. According to the method for filling and constructing the foam concrete in the coal mine soft rock largely-deformed roadway supporter, the filling operation, the double-layer plastic net and air tubing cloth operation and the guniting operation are performed alternately, so that the filling process is visualized, and the filling quality is effectively guaranteed.

Description

technical field [0001] The invention relates to a roadway support construction method, in particular to a foam concrete filling construction method in coal mine soft rock large deformation roadway support, and belongs to the technical field of rock and soil support. Background technique [0002] As the main energy source in the world, coal has always occupied a very important position. my country's annual coal production and consumption rank among the top in the world. In the primary energy consumption structure of social and economic life, coal has always been the primary energy source and an important guarantee for my country's energy security. With the rapid development of the economy, the demand for coal has increased sharply, and will continue to occupy a very important position for a long time. In 2009, my country's raw coal output reached 3.05 billion tons, ranking first in the world. Correspondingly, the annual roadway excavation length of China's coal industry reac...

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Problems solved by technology

However, the main process has not yet been mechanized, the labor intensity is high, the filling speed is slow, the mechanical properties of the filling material are not good, and the filling effect is not ideal, etc.

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