Practical Application of Roof Weakening in Fully Mechanized Caving Mining
During the hard roof coal seam mining operation,the goaf is prone to form a large area of suspended state.In order to avoid safety accidents caused by collapse,this article takes the 2301 fully mechanized caving mining face of a coal mine in Shanxi Province as an example,selects a reasonable roof weakening technology for on-site application based on the actual situation,and detects and records the pressure of the roof rock layer in real time.The detection results indicate that the pressure step distance of the coal seam roof strata has significantly decreased,and the weakening effect is significant,which is of great significance for the safety production of the fully mechanized mining face.
fully mechanized caving working facehard top plateweakening of the top platedeep hole blasting technology
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