Anhui Huoqiu Iron Mine

Release time:

2024-10-16

2010 Anhui 313 Geological Team

Geological Design

1. Design depth 1500 m, final hole diameter ≤ 75mm, core diameter ≤ 46 mm
2. The whole hole core takes water≤85%, taking rate of ore-bearing section is long≤90%

Overview of final hole

Construction from 2009 to 2010.6 months, depth 2706.68 m, aperture 77mm; core diameter 46mm, take rate 99.38;
Top angle 12.1 °, azimuth 252.2 °

Equipment

FYD-2200 type split tower full hydraulic power head drilling rig

Formation information

Iron ore, surface Quaternary loose strata, accompanied by crushing, collapse, water leakage, water gushing and other geological conditions

Construction characteristics

The formation is complex, into the four layers of technical casing protection wall, the use of reaming technology.

Drilling process scheme

Drilling tool configuration

Process technology point

open

Opening:φ110 single-tube alloy drill core drilling
Complete bedrock, with guideφ168/110 alloy drill bit
Reaming depth247.83m

φ110 single-pipe drilling tool φ168/110
alloy drill bit

1, guide reaming drill reaming process, guarantee
It is proved that the reaming hole is not deviated and the drilling track is consistent.
2. JS75 drill with JS75B rope drill pipe
Technology with φ77 drill bit

Orifice tube: depth approx.247.83m

φ146 sleeve boot

Second opening

Drilling in:φ130 single-tube diamond drilling coring extension
Drilling Depth256.53m

φ127 Single Pipe Drilling Tool φ130 King Kong
stone drill bit

Technical casing: depth approx.256.53m

φ127 sleeve boot

Three open

Drilling in:φ96 diamond rope core drilling
282.52m, due to formation breakage, water leakage and water gushing,
Useφ110 with guide diamond bit reaming

φ96 drilling tool φ110/96 King Kong
Stone Reamer Bit

Technical casing: depth approx.282.52m

φ108 sleeve boot

Four open

Drilling in:φ97 diamond rope coring
1230.37m

φ89 drill pipe φ97 drill tool

Technical casing: depth approx.1230.37m。

φ89 sleeve boot

Five open

Drilling in:φ77 diamond rope core drilling
2706.68m

φ77 drilling tool φ77 diamond bit

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