Thin coal seam mined-out area paste body filling construction method

Abstract

The invention discloses a thin coal seam mined-out area paste body filling construction method. The construction method is characterized in that down hole seeping water is held by a water sac and then is filled back in a mined-out area, the water filling water sac is utilized to occupy part of space of the mined-out area, correspondingly a method of reducing the filling size of a paste body is conducted to fill the mined-out area, and the water filling water sac is finally solidified in a filling body of the whole mined-out area and becomes a component of the whole filling body. The water filling water sac is a rubber sac and is provided with a through hole for being inserted by a filling steel pipe, the injecting water of the water sac is directly taken from the down hole seeping water, the down hole water damage is eliminated, and the pollution due to outside discharging of down hole waste water is eliminated. The thin coal seam mined-out area paste body filling construction method has the characteristics of safety and reliability, environmental protection technology, simple operation, relatively low filling cost and the like.

Description

technical field [0001] The invention relates to a paste filling method, in particular to a paste filling method using mine water as filling material. Background technique [0002] In the coal production process of the prior art, there are two deficiencies: one is that the filling cost accounts for a relatively high proportion of the unit coal production cost, and it is time-consuming and labor-intensive; , Also brings the increase of water pumping equipment and operating costs. [0003] With the continuous innovation and transformation of energy saving and consumption reduction and green production technology, especially, with the dwindling of coal resources and the depletion of high-quality mineral resources, coal enterprises have already completed the transformation from the early traditional low-level, rough, and predatory mining methods. , to the transformation of resource conservation, efficient utilization, and environmentally friendly production methods relying on te...

AI Technical Summary

Problems solved by technology

[0002] In the coal production process of the prior art, there are two deficiencies: one is that the filling cost accounts for a relatively high proportion of the unit coal production cost, and it is time-consuming and labor-intensive; , also brings about the increase of pumping equipment and operating costs

[0006] 1. In the process of filling construction, when encountering accidental phenomena such as rapid sinking or partial collapse of the roof, it will cause the rupture / explosion of the air bag, which will bring a certain degree of safety hazard; and, correspondingly, will lead to difficulties in construction operations The increase in construction costs derived from safety precautions

[0007] 2. After the filling construction is completed, a large number of inflatable air bags with high pressure are buried underground. As the roof sinks for a long time until it becomes stable, the pressure of the air bag will be continuously compressed, resulting in a rapid rise in internal pressure. High, there will be sporadic potential for capsule rupture / explosion

[0008] In other words, a large number of inflatable air bags buried underground are similar to "explosive bags" buried one after another in a well with extremely high safety protection requirements, which may be detonated at any time, and there are certain safety hazards

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