Combined rock-breaking TBM tunneling method in complex strata for realizing three-way force detection

Patent metadata

Field	Value
Publication number	US-11486249-B2
Application number	US-202016919058-A
Country	US
Kind code	B2
Filing date	Jul 1, 2020
Priority date	Jul 2, 2019
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

Disclosed a combined rock-breaking TBM tunneling method in complex strata for realizing three-way force detection, comprising the steps of preparing a combined mechanical-hydraulic rock-breaking cutter head for TBM construction; starting construction; advancing the combined mechanical-hydraulic rock-breaking cutter head; pushing and pressing against a tunnel face by a mechanical cutter tool; subjecting a three-way force detection cutter to squeezing forces; feeding back three-way force data by a three-way force sensor; processing information by a TBM back-end control processor; obtaining a value of rock-cutter contact angle φ; feeding back parameter information to a TBM cutter head control center by a lithology index center; responding by the TBM cutter head control center, obtaining and adjusting parameters by the mechanical cutter tool equipped with the three-way force sensor; and breaking rock by the combined mechanical-hydraulic rock-breaking cutter head. The method disclosed is energy-saving and efficient, and has high rock-breaking efficiency.

First claim

The invention claimed is:

1. A combined rock-breaking Tunnel Boring Machine (TBM) tunneling method in complex strata for realizing three-way force detection, comprising:
Step 1 : preparing a combined mechanical-hydraulic rock-breaking cutter head ( 1 ) of a combined rock-breaking TBM ( 17 ) for construction;
Step 2 : starting construction by the combined rock-breaking TBM ( 17 );
Step 3 : propelling the combined mechanical-hydraulic rock-breaking cutter head ( 1 );
Step 4 : pushing and pressing mechanical cutter tools ( 1 . 111 ) against a tunnel face ( 15 );
Step 5 : subjecting three-way force detection cutters to squeezing forces and three-way force sensors ( 1 . 122 ) obtaining three-way force data, wherein the three-way force detection cutters are loaded with the three-way force sensors;
Step 6 : sending the three-way force data from the three-way force sensors ( 1 . 122 ) to a TBM back-end control processor;
Step 7 : processing the three-way force data by the TBM back-end control processor;
Step 8 : obtaining a value of a rock-cutting contact angle φ from said processing the three-way force data; obtaining parameter information from a lithology index center based on the value of the rock-cutting contact angle φ; sending the parameter information to a TBM cutter head control center;
Step 9 : the TBM cutter head control center responding to the parameter information;
Step 10 : obtaining the parameter information at the mechanical cutter tools ( 1 . 111 ) and adjusting the mechanical cutter tools ( 1 . 111 ) based on the obtained parameter information; and
Step 11 : breaking rock by the combined mechanical-hydraulic rock-breaking cutter head ( 1 ).

2. The method of claim 1 , wherein in step 1 , the combined mechanical-hydraulic rock-breaking cutter head ( 1 ) is installed with a mechanical cutter rock-breaking device ( 1 . 1 );
the mechanical cutter rock-breaking device ( 1 . 1 ) comprises TBM propulsion cutter mechanisms ( 1 . 11 ) and three-way force detection cutter mechanisms ( 1 . 12 ); and the three-way force detection cutter mechanisms ( 1 . 12 ) comprise the three-way force detection cutters ( 1 . 121 );
the TBM propulsion cutter mechanisms ( 1 . 11 ) and the three-way force detection cutter mechanisms ( 1 . 12 ) are both arranged in a radial direction of the combined mechanical-hydraulic rock-breaking cutter head ( 1 ) with respect to the center of the combined mechanical-hydraulic rock-breaking cutter head ( 1 ); and
the TBM propulsion cutter mechanisms ( 1 . 11 ) and the three-way force detection cutter mechanisms ( 1 . 12 ) are arranged alternately;
in step 4 , the pushing and pressing the mechanical cutter tools ( 1 . 111 ) and the three-way force detection cutters against the tunnel face ( 15 ) comprises: the TBM propulsion cutter mechanisms ( 1 . 11 ) and the three-way force detection cutter mechanisms ( 1 . 12 ) perform penetration-cutting on the tunnel face ( 15 ) under the action of hydraulic propulsion cylinders.

3. The method of claim 2 , wherein the three-way force sensors ( 1 . 122 ) are provided at blade edges of the three-way force detection cutters ( 1 . 121 );
wherein in step 5 , the subjecting the three-way force detection cutters ( 1 . 121 ) to squeezing forces comprises: the three-way force detection cutters ( 1 . 121 ) contacts and press against the tunnel face ( 15 ) to be squeezed when the TBM works.

4. The method of claim 3 , wherein in step 6 , the sending the three-way force data by the three way force sensors comprises: after subjecting the three-way force detection cutters ( 1 . 121 ) to squeezing forces in step 5 , the three-way force sensors ( 1 . 122 ) obtaining a cutter head normal force, a cutter head rolling force, and a cutter head lateral force when the TBM cutter head is working, and sending the three-way force data to the TBM back-end control processor.

5. The method of claim 4 , wherein in step 7 , the processing the three-way force data by the TBM back-end control processor comprises: the TBM back-end control processor is configured to receive real-time three-way force data of the three-way force detection cutters detected by the three-way force sensors ( 1 . 122 );
the TBM back-end control processor is configured to process the three-way force data after being received to obtain the value of the rock-cutting contact angle φ, send the φ value to the lithology index center with the value of the rock-cutting contact angle φ as a search term, and find a corresponding value of rock cutter the rock-cutting contact angle φ for a three-way force detection cutter obtained in a lab from the lithology index center, so as to determine a lithology type in a real-time cutting and breaking of the combined mechanical-hydraulic rock-breaking cutter head ( 1 ), obtain corresponding working condition parameters of the TBM propulsion cutter mechanisms ( 1 . 11 ) from the parameter information, and send the obtained corresponding working condition parameters to the TBM cutter head control center;
the value of the rock-cutting contact angle φ is calculated in accordance with a semi-theoretical and semi-empirical constant cross-section cutter prediction model:
NRF Rost =0.5000;
φ=arctan(FR/FN)×NRF Rost ;

wherein, φ represents rock cutter the rock-cutting contact angle in rad;
NRF Rost represents a normalized reasonable predictive value of a resultant force on a cutter;
FN and FR represent values of cutter normal force and cutter rolling force, respectively, and the unit thereof is KN.

6. The method of claim 5 , wherein:
in step 8 , the lithology index center is an experimental database obtained in rock sample mechanical experiments;
the experimental database is constructed based on rock samples obtained by drilling processes on construction sites; and
the experimental database is a database of parameters about optimal water jet pressure and mechanical cutter thrust obtained by utilizing a combined rock-breaking comprehensive test bench under laboratory conditions to simulate rock confining pressure conditions;
the method further comprising: sending, from the lithology index center a set of TBM optimal rock-breaking working condition parameters of the parameter information to the TBM back-end control processor when obtaining a displacement length value of cutter propulsion per unit time sent by the TBM back-end control processor.

7. The method of claim 6 , wherein the TBM propulsion cutter mechanisms ( 1 . 11 ) further comprise at least the mechanical cutter tools ( 1 . 111 ) and high-pressure water jet nozzle structures ( 1 . 112 );
the mechanical cutter tools ( 1 . 111 ) and the high-pressure water jet nozzle structures ( 1 . 112 ) provided on the combined mechanical-hydraulic rock-breaking cutter head ( 1 ) are both circumferentially arranged thereon;
the mechanical cutter tools ( 1 . 111 ) and the high-pressure water jet nozzle structures ( 1 . 112 ) are arranged in such a way that the high-pressure water jet nozzle structures ( 1 . 112 ) are provided at center points of two adjacent mechanical cutter tools ( 1 . 111 );
each of the high-pressure water jet nozzle structures ( 1 . 112 ) comprises a nozzle ( 1 . 1121 ), a high-pressure water pipe ( 1 . 1122 ), an outer spherical supporting mechanism ( 1 . 1123 ), an inner spherical rotary mechanism ( 1 . 1124 ), and a pipe steering controller ( 1 . 1125 );
the outer spherical supporting mechanism ( 1 . 1123 ) is installed and fixed on a main body of the combined mechanical-hydraulic rock-breaking cutter head ( 1 );
the inner spherical rotary mechanism ( 1 . 1124 ) is located inside the outer spherical supporting mechanism ( 1 . 1123 );
the pipe steering controller ( 1 . 1125 ) is arranged between the inner spherical rotary mechanism ( 1 .

Assignees

• Inst Rock & Soil Mech Cas
• Institute Of Rock And Soil Mech Cas

Inventors

• Zhou Hui
• Lu Jingjing
• Xu Futong
• Zhang Chuanqing
• Hu Dawei
• Gao Yang
• Yang Fanjie
• Zhu Yong
• Hu Mingming

Classifications

• E21D9/104

  Cutting tool fixtures (devices with percussive tools E21D9/106) · CPC title

• E21D9/087

  with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines · CPC title

• E21D9/1066

  with fluid jets (projecting hot gases E21D9/1073; drilling by liquid or gas jets E21B7/18; slitting by liquid jets E21C25/60) · CPC title

• G01L5/16

  for measuring several components of force · CPC title

• E21D9/1006

  with rotary cutting tools (for cutting simultaneously the whole cross-section E21D9/11; drill bits E21B10/00) · CPC title