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Method, device and system for determining strengthening timing of weakening surrounding rock in underground engineering

A technology for underground engineering and method determination, applied in earthwork drilling, data processing applications, wellbore/well components, etc., can solve problems such as missed support time, long time interval, and delay in construction period, etc., to achieve fast and timely giving, Study the exact effects

Active Publication Date: 2018-07-13
SHANDONG TIANQIN ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The process needs to go through drilling and coring, transportation, and simulation of water spraying on rock samples. Therefore, the time interval from on-site coring to test report is long, which delays the construction period
[0006] 2. The above-mentioned test report cannot quickly give the optimal support time for weakened surrounding rock under the influence of groundwater conditions, and the previous design has not considered the optimal support time, and the optimal support time has often been missed when the test report is obtained. support time

Method used

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  • Method, device and system for determining strengthening timing of weakening surrounding rock in underground engineering
  • Method, device and system for determining strengthening timing of weakening surrounding rock in underground engineering
  • Method, device and system for determining strengthening timing of weakening surrounding rock in underground engineering

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Embodiment 1

[0043] Please refer to figure 1 , the embodiment of the present application provides a method for quickly determining the reinforcement time of weakened surrounding rock, including the following steps:

[0044] Step 1: Obtain on-site the initial surrounding rock strength at different depths when the excavation body is not weakened at the set observation area, including: drilling in the observation area, and obtaining the drilling data reflecting the strength of the surrounding rock during the drilling process by the drilling rig. Enter parameters to obtain the corresponding surrounding rock strength at different depths.

[0045] Step 2: Determining the plastic zone of the surrounding rock and the corresponding area of ​​the original rock area includes: dividing the surrounding rock according to the set depth, the area greater than the set depth is the original rock area, and the area smaller than the set depth is the plastic area.

[0046] Step 3: Calculate the average streng...

Embodiment 2

[0066] Please refer to figure 2 and image 3 , which shows a rapid reinforcement design method for weakened surrounding rock, including the use of a drilling rig and a digital drilling measurement system for the strength of surrounding rock. In order to eliminate the impact of the drilling characteristics of different drilling rigs on the parameters of the drilling rig, the present invention uniformly adopts full hydraulic impact Rotary drilling rig adopts high-pressure gas slag discharge method, and the drilling diameter is 50-100mm.

[0067] Specific steps are as follows:

[0068] In order to achieve this object, the present invention adopts following technical scheme:

[0069] a. First excavate the surrounding rock of the chamber, and set up observation points in the chamber, so as to observe the subsequent water gushing state of the roof and side surrounding rock, and obtain the characteristics by investigating the surrounding rock and analyzing the state of water spray...

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Abstract

The invention discloses a method, a device and a system for determining strengthening timing of weakening surrounding rock in underground engineering. The determining method includes the steps that the strength degrees of the surrounding rock at different depths in the set observation area of an excavation body at different time periods are obtained, and the average strength degree of the surrounding rock at different time periods is calculated; the corresponding relationship of the average strength degree of the surrounding rock varying with time is fitted; and according to the correspondingrelationship, the time corresponding to the time that the average strength degree of the surrounding rock is weakened to the set strength is calculated. In the underground engineering, due to the influence of groundwater conditions, the physical and mechanical properties of the surrounding rock tend to be weakened in a certain extent over time, in order to ensure the stability of the surrounding rock in the underground engineering, the surrounding rock needs to be strengthened before the surrounding rock is weakened to a safe limit. Through the scheme, the changing situations of the mechanicalindex of weakening the surrounding rock with time can be obtained more quickly and directly, and the weakening extent of the surrounding rock can be more really reflected, and the strengthening timing of the surrounding rock can be guided in a targeted mode.

Description

technical field [0001] The present disclosure generally relates to the technical field of underground engineering safety, and particularly relates to a method, device and system for determining the timing of reinforcement of weakened surrounding rock in underground engineering. Background technique [0002] With the continuous development of underground engineering construction in my country, underground engineering construction gradually extends to complex geological conditions. Due to the complexity of the rock formation itself and the limitations of the detection range and accuracy of existing detection technologies, it may be encountered during the excavation of roadways. The situation of gushing water from water-rich rock formations. Since the properties of surrounding rocks vary widely, the weakening and hydrolysis characteristics of different rocks after contact with water are also different. In the existing underground engineering construction design, the method of d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00G06Q50/02
CPCE21B49/00E21B49/003G06Q50/02
Inventor 李术才王琦许英东曾昭楠江贝高松
Owner SHANDONG TIANQIN ENG TECH CO LTD
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