mining method and method...
TRANSCRIPT
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）