Device and method for sealing hole by using returned slag of layer-through drill hole of low drainage roadway of coal mine
A layer-penetrating drilling and coal mine technology, applied in safety devices, mining equipment, earthwork drilling, etc., can solve the problems of high labor intensity, lack of mature standards, cumbersome sealing process, etc., and achieve saving of sealing materials, Excellent sealing performance, the effect of reducing labor intensity
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[0039] The present invention will be further described below through specific embodiments and drawings.
[0040] 1. The principle of the sealing technology of drilling through the coal and rock.
[0041] After the overlying rock or coal seam (the drilling process is to drill the rock first and finally pass through the coal seam) is drilled and broken, it will form gravel, cuttings or their mixtures with various water contents, which are affected by water flow and oblique gravity. Under the joint action, a continuous movement similar to flow is produced along the slope of the inner wall of the borehole at various speeds.
[0042] The present invention refers to these reflux cuttings as "return slag", and uses these return slag to seal the borehole through the layer. The specific process principle is as follows figure 1 It shows: when the water content reaches 80%, the reflowing rock fragments, namely "return slag", will gradually accumulate, dehydrate and viscose through process impro...
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