New technology for conducting grouting filling for underground coal goaf and abandoned workings
A kind of goaf and new technology, which is applied in the fields of backfill, mining equipment, earthwork drilling, etc., can solve the problems of wasting time, difficult to realize the micro-pressure grouting process, and unable to realize the non-pressure grouting process with large flow rate, etc. , to achieve the effect of saving construction time
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[0016] The construction steps of the new technology of grouting and grouting filling for underground coal goafs and waste roadways of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] Step 1: Leading hole: Use geological drilling rigs or down-the-hole drilling rigs to drill holes from the ground surface to the ground directly or through the coal goaf or abandoned roadway in the deep part of the formation and other related cavities, gaps, fissures, etc.
[0018] The second step: grouting without pressure grouting:
[0019] (1) Pulp making: The grouting slurry consists of a dry powder ash tank, a dry powder conveying pipe, a Y-shaped pipe that can conduct diversion sampling and real-time monitoring of the dry powder flow process, a slurry mixing pipe, a mixing barrel, and agitation. The pool and other components form a new technology pulping backstage mixing production. One is that the pulping backgro...
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