mining method and method...

掘削と支保の基礎

ー 講義内容 －

１．掘削システム

１．１ 発破工

１．２ 機械化掘削

２．支保システム

２．１ 地盤応答曲線

２．２ 支保のガイドライン

２．３ 支保の種類

木製支保

鋼性支保

ボルト支保

コンクリート支保

NATM工法

掘削システム

穿孔＆発破

発破工

発破工

発破工

機械化掘削（ドラッグ・ピック）

ROADHEADER

ROADHEADER

CONTINUOUS

MINER

機械化掘削（ディスク・カッター＆ボタン・カッター）

TBM（TUNNEL BORING MACHINE）

TBM（TUNNEL BORING MACHINE）

PERFORMANCE OF

ROADWAY DRIVAGE

支保工

地盤応答曲線

SUPPORT PERFORMANCE

AND REACTION

SUPPORT SYSTEMS

WOODEN SUPPORT AND STRENGTH

STEEL SUPPORT: RIGID ARCHES

ARTICULATED

(MOLL)

ARCHES

FORMS OF ARTICULATIONS OF

MOLL ARCHES

YIELDING ARCHES

(TOUSSAINT-HEINZMANN)

BOLTING SUPPORT SYSTEM

Australian Rock Bolting Technology:

1) Magnitude and direction of maximum horizontal stress

2) Horizontal stress: much greater than vertical stress

3) Fully bonded bolts with chemical resin

4) High quality strong bolts

RESIN BOLT INSTALLATION

PROCEDURES

COAL

HORIZONTAL STRESS

SILTSTONE

MUDSTONE

SEATEARTH

Roof shear and bulking

Floor heave

TYPICAL ROOF FAILURE MECHANISM ASSOCIATED WITH

HORIZONTAL STRESS AND WEAK GEOLOGY.

HORIZONTAL STRESS

CONFINED

UNCONFINED

CONFINEDUNCONFINED

Load

Displacement

100

200

300

400

500

600

700

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

0

Displacement (mm)

Lo

ad

(kN

)

Point Anchored

Bolt

Full Resin

Bolt

Birdcaged

Cable

LOAD DEFORMATION

CHARACTERISTICS

OF DIFFERENT BOLTS

MONOLITHIC CONCRETING

CONCRETE BLOCKS

SHOTCREATING

DRY TYPE AND WET TYPE

SHOTCRETING

ROCK-SUPPORT INTERACTION

NATM

（NEW AUSTRIAN TUNNELING METHOD）