Comprehensive shaft sinking method of positive and raising boring for vertical shaft

A vertical shaft and forward technology, applied in the field of drilling, can solve the problems of low construction cost, slow well completion speed, and long equipment occupation time, and achieve the effects of reducing the storage area, increasing the well completion speed, and low construction cost

Inactive Publication Date: 2012-06-13
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing mine shaft sinking technology has a fast construction speed and low construction cost for drilling the topsoil section, but there are many problems in the construction o

Method used

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  • Comprehensive shaft sinking method of positive and raising boring for vertical shaft
  • Comprehensive shaft sinking method of positive and raising boring for vertical shaft
  • Comprehensive shaft sinking method of positive and raising boring for vertical shaft

Examples

Experimental program
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Embodiment

[0030] Such as figure 1 , figure 2 Shown, a kind of shaft forward, counter-shaft comprehensive sinking method, comprises the following steps:

[0031] Step 1. Use the shaft drilling rig to drill into the bedrock section to form a well hole in the topsoil section. The drill bit of the shaft drilling rig rotates to break the rock and breaks the rock into cuttings. The drill bit of the shaft drilling rig is equipped with a spherical tooth hob or a wedge hob , the speed of the vertical well drilling rig is 0-8r / min, the pressure of the drill bit of the vertical well drilling rig is less than 60% of the weight of the drill bit in the mud, when drilling in the transition zones and weathered zones of various strata, the drilling pressure should be appropriately reduced on the basis of the original Small 5-10T;

[0032] Step 2. Input compressed air through the air pipe in the drill pipe of the shaft drilling rig, and discharge the mud containing cuttings generated during the drilli...

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PUM

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Abstract

The invention discloses a comprehensive shaft sinking method of positive and raising boring for a vertical shaft, which comprises the following steps: drilling into a bedrock section by utilizing a vertical shaft drill machine, forming surface soil section well holes, discharging rock-debris-containing slurry produced during the well drilling process to the ground at high speed through air lifting; prefabricating sections of well walls on the ground; adding counter weight water in the drill well, slowly sinking the sections of well walls to the surface soil section well holes by utilizing buoyancy force of slurry to the well walls in the drill well, and sequentially welding the well walls to the surface soil section well holes; filling grout between the well walls and the rock sides on the outer sides of the well walls, filling cement paste in the lowest layer, then alternatively filling upwards the cement paste and rubbles layer by layer, and obtaining a surface soil section drill well; selecting a suitable raise-bore drilling machine according to practical requirements of the diameter and depth of a bed rock section shaft; lowering the raise-bore drilling machine and fixing the raise-bore drilling machine at the bottom of the surface soil section drill well; inversely expanding the holes by utilizing the raise-bore drilling machine to form bing-holes; and the diameter of the bing-holes is enlarged to preset shaft diameter. The comprehensive shaft sinking method of the positive and raising boring for the vertical shaft greatly improves well forming speed of shaft sinking and is safe, reliable and low in construction cost.

Description

technical field [0001] The invention relates to the field of well drilling, in particular to a comprehensive drilling method for forward and reverse shafts. Background technique [0002] Mine shaft sinking is a fully mechanized comprehensive sinking process. The staff work on the ground to achieve drilling without going down the shaft. The construction process includes 1) crushing, carrying, conveying and separation of stratum rock and soil; 2) expanding the well step by step; 3) temporary support for the side of the well; 4) permanent support including making the well wall, suspending sinking, filling behind the wall, Grouting etc. The rotary table of the large-diameter drilling rig arranged on the ground is used to drive the drill pipe, and the drill pipe drives the drill bit to rotate, and the hob on the drill bit realizes self-rotation and revolution. Afterwards, after several times of expanding the well and correcting the deviation and deviation of the well, when the ...

Claims

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Application Information

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IPC IPC(8): E21D1/08E21D3/00
Inventor 刘志强李英全陈远坤孙建荣王新王强武士杰李恩涛荆国业张广宇程守业
Owner BEIJING CHINA COAL MINE ENG CO LTD
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