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Method for looking for hole at bottom of filling drill hole

A technology at the bottom of the hole and in the borehole, which is applied in the fields of backfill, earthwork drilling, wellbore/well components, etc. It can solve the problems of easy wear and tear of pipelines in the hole and high safety hazards for construction personnel, and achieve high utilization rate and improved efficiency. Feasibility and efficiency, the effect of accelerating progress

Active Publication Date: 2019-04-05
安徽马钢罗河矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of high safety hazards for construction personnel in the prior art of finding holes at the bottom of the well, and the problems that the pipelines in the holes are easy to wear, the present invention provides a method for finding holes at the bottom of the filling borehole

Method used

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  • Method for looking for hole at bottom of filling drill hole
  • Method for looking for hole at bottom of filling drill hole

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 with figure 2 As shown, a method for finding holes at the bottom of a filling hole includes the following steps:

[0040] (1) Drill holes vertically from the filling station on the ground surface. In this embodiment, 6 holes are drilled, namely 1# hole 1, 2# hole 2, 3# hole 3, 4# hole 4, 5# hole 5 and 6# hole 6, drilled to the designed height below the ground surface, the height below the ground surface designed in this embodiment is -455m; after the drilling is completed, the hole is washed and cemented after the cement mortar wall. Bimetal composite wear-resistant pipes are installed in the borehole to prevent collapse and slabs around the borehole. Bimetal composite wear-resistant pipes are installed in all 6 holes, which effectively slows down the rubber material transportation to the downhole area. Wear to the hole, thereby increasing the service life of the hole;

[0041] (2) Construct a ramp 7 at the return air gate of 4# hole 4 at the height of -4...

Embodiment 2

[0049] Basically the same as embodiment 1, this embodiment also includes step (6): setting a steel structure protective wall, the steel structure protective wall is set at a distance of 1m from the filling borehole to be processed, if the distance is too close, the filling borehole pipe wall is The spray of high-pressure water in the pipeline after burning will cause damage to the construction personnel; the step (6) is set before the step (4). Preferably, the steel structure protective wall adopts I-steel beams to form the skeleton, The lap grid size is 110mmx110mm, and the skeleton is welded with 11mm thick steel plate as the surface layer, so that the overall steel structure protection wall has high strength and load-bearing capacity; the entire steel structure protection wall and the periphery of the roadway 8 are fixed by bolts. The surface of the rod body of the anchor rod is provided with a galvanized layer, and an operation observation hole is provided on the steel struc...

Embodiment 3

[0052] Basically the same as in embodiment 2, the difference from embodiment 2 is that the steel structure protective wall is set at a distance of 2m from the filling hole to be processed. If the distance is too far, the gas welding operator cannot perform remotely in the steel structure protective wall. Pipeline wall breaking operation; the steel structure protection wall adopts I-steel beam lap joint as the skeleton, the lap grid size is 100mmx100mm, and the skeleton is welded with 10mm thick steel plate as the surface layer, so that the overall steel structure protection wall has higher strength And load-bearing capacity; the entire steel structure protective wall and the periphery of the roadway 8 are fixed by bolts, the surface of the bolt body is provided with a galvanized layer, and the steel structure protective wall is provided with an operation observation hole. Preferably, the operation observation The size of the hole is 100mmx100mm, which satisfies the operating spa...

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Abstract

The invention discloses a method for looking for a hole at a bottom of a filling drill hole, and belongs to the technical field of the underground mining. In allusion to problems in the prior art thata higher potential safety hazard is existent while a constructor looks for the hole at the bottom under the shaft, and a pipeline in the hole is easily worn, the provided method for looking for the hole at the bottom of the filling drill hole comprises the following steps: downwards drilling from the ground surface in a direction perpendicular to the ground surface, until a designed height belowthe ground surface; constructing an inclined roadway in the height below the ground surface, and constructing a horizontal roadway towards a position of the hole bottom through the inclined roadway; while the roadway is close to a forecasted position of the hole bottom, establishing a shot hole on the cross section of the roadway and blasting; after the drill hole to be filled is totally exposed,burning and penetrating a pipe wall of the filling drill hole by using gas welding and draining water; after ending water drainage, cutting the pipe wall of the filling drill hole by using a plasma cutting machine; after cutting, conveying slurry to the filling drill hole until an underground empty area. The method is capable of greatly guaranteeing safety of the underground constructor, rapid inefficiency, and smaller in wearing to the pipeline in the filling drill hole, so cost is reduced for enterprises.

Description

Technical field [0001] The invention belongs to the technical field of underground mining, and more specifically, relates to a method for finding holes at the bottom of a filling borehole. Background technique [0002] Mine filling is required for mining and geological protection in terms of preventing the movement of surrounding rock, subsurface, collapse, and reducing the dilution rate; there are many filling methods for mines, including waste rock filling, tailings filling, and cemented filling. In terms of cost and convenience, tailings filling and cemented filling are basically used to prepare slurry on the surface, through vertical drilling and horizontal and inclined pipelines, through layered treatment, and self-flow transport to the required filling goaf; current filling technology Adopting high-concentration full tailings cemented filling, the filling station is equipped with 2 filling series, each series includes 2 1500m 3 Vertical sand silo, 2 cementing material stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00E21B7/18E21B47/022E21F17/00
CPCE21B7/18E21B47/022E21F15/00E21F17/00
Inventor 王忠强王宏喜何晓文刘长洲张辉郏威徐青
Owner 安徽马钢罗河矿业有限责任公司
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