Goaf bottom edge construction drilling method and device

Abstract

The invention relates to the technical field of goaf backfilling, in particular to a goaf bottom edge construction drilling device which comprises a water storage bin, the output end of the water storage bin is connected with the input end of a pump through a water pipe, the pump is connected with a punching mechanism for punching through a water pipe, and the punching mechanism comprises a pipe body. A feeding mechanism is detachably and fixedly installed in the pipe body, a water cutting mechanism is movably connected to the bottom of the pipe body, a power surface at the upper end of the water cutting mechanism is designed to be an inclined surface, so that flowing water flow generates thrust on the power surface, the power surface rotates rapidly, meanwhile, the water flow is sprayed out from a high-pressure spray head to wash soil, and water cutting is achieved. Softening of the soil enables the water cutting mechanism to achieve the operation of going deep into the soil through vibration of the vibrator, and the mode of going deep into the soil in a micro-vibration mode can effectively reduce vibration damage to the soil and reduce the problem of mine collapse.

Description

technical field [0001] The invention relates to the technical field of goaf backfilling, in particular to a drilling method and device for construction at the bottom edge of a goaf. Background technique [0002] The goaf is a "hole" created by man-made excavation or natural geological movement below the surface. The existence of the goaf makes the safe production of the mine face a great safety problem. Personnel and mechanical equipment may fall into the goaf and be damaged. harm. [0003] Due to the safety hazards of the goaf, the current developers usually backfill the mined-out area after mining. The single-layer goaf is usually backfilled by drilling and grouting, while the multi-layer goaf, that is, a piece of ground has obvious For layered composite vertical goafs, the drilling and grouting is usually carried out in the upper goaf of the bottom goaf, and then the upper and upper goafs are drilled and grouted layer by layer in the upper goaf. In the process of grouti...

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Problems solved by technology

[0003] Due to the safety hazards of the goaf, the current developers usually backfill the mined-out area after mining. The single-layer goaf is usually backfilled by drilling and grouting, while the multi-layer goaf, that is, a piece of ground has obvious For layered composite vertical goafs, the drilling and grouting is usually carried out in the upper goaf of the bottom goaf, and then the upper and upper goafs are drilled and grouted layer by layer in the upper goaf. In the process of grouting and drilling in the multi-layer goaf, due to the large diameter of the hole excavation, the existing large-scale drilling device will bring severe vibration to the soil layer, and there is a risk of mine cavern collapse. Therefore, we need to find out A perforating method with little or no vibration to the soil layer

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