Method for enabling working face to pass through igneous rock intrusion area

Abstract

The invention discloses a method for enabling a working face to pass through an igneous rock intrusion area, and concretely discloses a method for enabling the working face to pass through the igneous rock intrusion area by utilizing a high voltage electric pulse taking a special solution as a medium for cracking and softening rock. The method comprises: reasonably distributing drill holes at the igneous rock intrusion area, injection the special solution into the drill holes and taking as the propagation medium of the high voltage electric pulse, utilizing the high voltage electric pulse to generate a large amount of cracks at the inner walls of the drill holes, and enabling the cracks to be continuously expanded to form fissures under the effects of the high voltage electric pulse and the solution pressure, also softening the igneous rock body through the chemical reaction between the solution and igneous rock, so as to realize the purposes of crushing and softening igneous rock body and enabling the working face to directly pass through the igneous rock intrusion area. The method avoids destruction on a coal cutter and other machinery equipment when the working face directly passes through the igneous rock intrusion area, and also avoids a large amount of time, source and manpower waste generated when the working face performs skip mining, guarantees safe efficient propulsion of the working face, and possesses relatively high popularization and application value.

Description

technical field [0001] The invention relates to a method for a working face to pass through an igneous rock intrusion area, in particular to a method for breaking and softening a rock mass with a high-voltage electric pulse so that a working face passes through an igneous rock intrusion area, and belongs to the field of coal mining. Background technique [0002] The Carboniferous coal-measure strata were intruded by igneous rocks, forming a large area of ​​igneous rock intrusion areas. Igneous rocks are interspersed in the Carboniferous coal seam strata. On the one hand, the original stratum structure is destroyed, which poses a great threat to the safety of the goaf project. On the other hand, the silicification of the coal seam destroys coal resources. Due to the high strength of the igneous rock mass intruded into the coal seam, the shearer was severely damaged when the working face advanced to the igneous rock intrusion area, and the working face had to be moved, resulti...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method of breaking and softening the rock mass with a high-voltage electric pulse using a special solution as the medium to make the working face pass through the igneous rock intrusion area, aiming at the manpower, time, and The great waste of resources; the potential safety hazards of the blasting method are relatively large; the simple drilling and chemical solution softening efficiency is low and the potential damage to mechanical equipment is a problem. A safe, efficient and controllable method of passing through the igneous rock invasion area of ​​​​the working face is proposed

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