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a co 2 Micro blast combined with tbm rock breaking method

A CO2 and rock-breaking technology, applied in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of high blasting vibration control requirements, fast rock-breaking wear, high frequency of tool change, and achieve high construction efficiency, high safety, Continuous effect of construction

Active Publication Date: 2021-12-21
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the excavation of urban hard rock and extremely hard rock, the vibration control requirements of urban surface blasting are high, and traditional explosive blasting has high requirements for use conditions, use environment, and daily management. The rock wears quickly, the frequency of tool change is high, and the economic effect is poor

Method used

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  • a co <sub>2</sub> Micro blast combined with tbm rock breaking method
  • a co <sub>2</sub> Micro blast combined with tbm rock breaking method
  • a co <sub>2</sub> Micro blast combined with tbm rock breaking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] In this example, CO 2 Micro-explosion combined TBM rock breaking device 1 includes cutter head mechanism 2, drilling rig installation mechanism 3 and CO 2 Blasting device mounting mechanism 4; drilling rig mounting mechanism 3 and CO 2 The blasting device installation mechanisms 4 are alternately arranged on the cutterhead mechanism 2; the cutterhead mechanism 2 is installed on the main bearing of the TBM; the belt conveyor 5 is installed on the support frame 6;

[0159] The cutterhead mechanism 2 includes a positive cutterhead 2.1 and a side cutterhead 2.2;

[0160] The side cutter head 2.2 is located on the outer periphery of the front cutter head 2.1;

[0161] Rig mounting cylinder 3.2 and CO of rig mounting mechanism 3 2 CO of blasting device installation mechanism 4 2 The installation cylinders 4.2 are alternately arranged on the positive cutter head 2.1;

[0162] The mechanical cutter 2.11 is arranged on the positive cutterhead 2.1; the side cutterhead 2.2 is...

Embodiment 2

[0172] Its rock-breaking method is the same as embodiment 1, and the difference is that the rock mass in this embodiment is through a certain blasting and cutting, and the contour of the tunnel surface formed at last is not flat (such as Figure 30 As shown), there is a difference in the stroke of the drill pipe of the drilling rig in the rock mass.

[0173] In this embodiment, a depth measurement sensor is set on the drilling rig (being the prior art); in this embodiment, the depth data of the actual drilling of the drilling rig is obtained by the depth measurement sensor on the drilling rig, and according to the depth data, the next stage CO 2 The filling amount of the blasting device and the length of the blasting tube are adjusted; Figure 30 , the actual working footage of the drilling rigs in area A is less than the actual working footage of the drilling rigs in area B, the adjustment method in this embodiment is: in the next stage state CO 2 When blasting the device, a...

Embodiment 3

[0175] Its rock-breaking method is the same as embodiment 2, and the difference is: in the present embodiment, the tunnel face contour line is an inclined structure or a rotating structure (such as Figure 31 shown); in Figure 31 , the actual working footage of the drilling rigs in area C is greater than the actual working footage of drilling rigs in area D. The adjustment method in this embodiment is: when the TBM turns, the drilling length in area C is greater than that in area D. In the next stage, the state CO 2 When blasting the device, according to the depth of the borehole, the CO 2 The filling amount of gas is adjusted, that is, the area of ​​C blasthole CO 2 Burst tube length and CO 2 The filling volume is larger than the D blast hole area.

[0176] Other unspecified parts belong to the prior art.

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Abstract

The invention discloses a CO 2 Micro-explosion combined with TBM rock breaking method. It includes the following steps, Step 1: Install CO 2 Micro-explosion combined with TBM rock-breaking device; step 2: rock-breaking operation; the drilling rig installation mechanism drills the rock wall; CO 2 The installation mechanism of the blasting device blasts and cracks in the drill hole, and the rock blocks are broken and dropped; the cutter head mechanism rotates, and the mechanical cutter on the cutter head mechanism scrapes off the unfallen rock blocks; Step 3: After all the work is completed, enter the next stage of work. The invention has the advantages of continuous construction, high construction efficiency, good rock breaking effect and high safety, and is suitable for tunnel excavation construction of hard rock and extremely hard rock.

Description

technical field [0001] The invention relates to the field of tunnels and underground engineering, in particular to the field of TBM tunnel construction under complex geological conditions. More specifically it is a CO 2 Micro-explosion combined with TBM rock breaking method. Background technique [0002] With the advancement of technology, higher requirements are put forward for the construction efficiency and construction effect of hard rock and extremely hard rock TBM tunnel boring machines in different environments. For the excavation of urban hard rock and extremely hard rock, the vibration control requirements of urban surface blasting are high, and traditional explosive blasting has high requirements for use conditions, use environment, and daily management. The rock wears quickly, the frequency of tool change is high, and the economic effect is poor. In addition, for the construction of TBM tunnels with a wide distribution of some hard rocks and high ecological env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D9/10E21D9/12E21C37/14
CPCE21D9/008E21D9/1006E21D9/12E21C37/14
Inventor 周辉徐福通卢景景高阳肖建成涂洪亮崔健
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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