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Multisection continuous observing method for feeding back tunnel surrounding rock deforming rule

A technology of surrounding rock deformation and multi-section, which is used in mechanical solid deformation measurement, tunneling, earthwork drilling, etc. It can solve problems such as failure to timely reflect the law of deformation and damage of surrounding rock in roadway, affecting roadway construction, and lag in information feedback. , to achieve the effect of saving labor resources, wide practicability, and reducing labor intensity

Inactive Publication Date: 2010-07-07
CHINA UNIV OF MINING & TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

Due to the long observation period, heavy workload, and lagging information feedback, the law of deformation and failure of the roadway surrounding rock cannot be reflected in time. When the roadway has large deformation or even instability, the observation work has not yet ended
In order to shorten the observation period, some mine pressure observation methods deliberately reduce the number of measuring stations or arrange densely measuring stations, but it is difficult to obtain correct results in a short period of time, and it also affects the normal tunneling construction of the roadway
Therefore, the observation of mine pressure in mine roadway still lacks a set of efficient and reasonable observation methods that can solve the above problems.

Method used

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  • Multisection continuous observing method for feeding back tunnel surrounding rock deforming rule
  • Multisection continuous observing method for feeding back tunnel surrounding rock deforming rule
  • Multisection continuous observing method for feeding back tunnel surrounding rock deforming rule

Examples

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Embodiment 1

[0018] Embodiment 1. A coal seam air return roadway in a coal mine of a mining group adopts the form of shed support. During the excavation, the deformation observation of the surrounding rock of the roadway is carried out to evaluate the currently adopted support form. The roadway has been excavated for nearly 300m. From the exposed rock formations, the surrounding rock conditions of the constructed roadway have basically remained unchanged. The geological conditions of this roadway are similar to those of the adjacent track roadway. According to the mine pressure appearance of the track roadway, the deformation of the surrounding rock around 100m behind the roadway excavation face 1 tends to be stable, and the deformation speed does not exceed 1mm / day. Therefore, it can be judged that the length I of the roadway in the tunneling influence period of this roadway is about 100m, and after 100m, the roadway enters the surrounding rock stability zone II. Daily footage of roadway ...

Embodiment 2

[0019] Embodiment 2. Deformation observation of the track roadway in the south wing of a certain mine. The excavation construction of the track roadway in the south wing entered the fractured zone of the fault group. According to the mine pressure of the roadway under similar conditions in the mine, it is judged that the length I of the roadway in the tunneling influence period of the roadway is 160m. Daily footage of roadway excavation working face S 0 5m, station spacing S 1 Take daily footage S 0 5 times that of 25m. Starting from 2m away from the excavation face, the first station 2, the middle station 3 and the tail station 4 are respectively arranged to the rear. The distance between the stations is 25m, and a total of 8 stations are arranged. The measuring station is installed and measured by the conventional cross-section method, and the observation is carried out for 5 days, mainly observing the deformation amount and deformation speed around the roadway. The obse...

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Abstract

The invention relates to a multisection continuous observing method for feeding back a tunnel surrounding rock deforming rule, which is suitable for support engineering of a mine tunnel. The tunnel length range of a tunneling influence period is judged according to the surrounding rock condition and the tunneling speed of the tunnel; 5 to 10 observing stations are distributed and installed in a range not smaller than the length at an observing station interval which is integral multiple of daily tunneling size of the tunnel; the observation is carried out once a day after installation and keeps for 3-5days, and the data for reflecting the tunnel deforming rule can be obtained. By the system distribution of the observing stations and the improvement of the observing method, the invention reduces the observing period from 50-80 days to 3-5 days, greatly reduces the workload of observing staffs and has high feedback speed and less influence on the tunneling construction of the tunnel; the reflected mine pressure rule can provide reliable information in time for guiding site construction and provide important basic data for solving the problem of support of the deep soft rock tunnel.

Description

technical field [0001] The invention relates to a continuous observation method, in particular to a multi-section continuous observation method for feeding back the deformation law of the surrounding rock of the roadway supporting engineering. Background technique [0002] As a channel for safe production in coal mines, the importance of mine pressure observation in roadways is self-evident. On the one hand, the reasonable control and maintenance of the roadway is related to the normal production of the mine and the life safety of the miners, and the accidents in the roadway are highly accidental and destructive, so daily mine pressure observations must be carried out to reflect the maintenance status of the surrounding rock. Take measures in time when abnormal situations occur; on the other hand, with the increase of coal mine mining depth, the control problems of deep and weak and broken surrounding rock roadways become more and more obvious, and the support technology nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/30E21D9/00E21D20/00
Inventor 张农韩昌良李桂臣郑西贵
Owner CHINA UNIV OF MINING & TECH
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