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Non-coal stratum tunnel rock outburst safety thickness processing method based on energy method

A processing method and technology of safe thickness, applied in the field of tunnel engineering, can solve problems such as outburst calculation of gas and rock in non-coal strata, and achieve the effect of reducing outburst accidents.

Pending Publication Date: 2022-03-08
CHENGDU SUDU GEOLOGICAL ENG CONSULTING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide the non-coal formation tunnel rock outburst safety thickness processing method based on the energy method, solve the problem that can not effectively realize the gas and rock outburst calculation of non-coal formation in the prior art

Method used

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  • Non-coal stratum tunnel rock outburst safety thickness processing method based on energy method
  • Non-coal stratum tunnel rock outburst safety thickness processing method based on energy method
  • Non-coal stratum tunnel rock outburst safety thickness processing method based on energy method

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Embodiment 1

[0046]This embodiment provides a non-coal stratum tunnel rock outburst safe thickness processing method based on the energy method, the non-coal stratum tunnel rock outburst safe thickness processing method based on the energy method is mainly used to solve the problem that the existing technology cannot effectively realize the non-coal stratum For the calculation of gas and rock outburst, the method based on the energy method to deal with rock outburst safety thickness in tunnels in non-coal formations has been put into practical use.

[0047] The application is carried out through the following embodiments, the non-coal formation tunnel rock outburst safety thickness processing method based on the energy method, it may further comprise the steps:

[0048] S1. Carry out basic assumptions and limitations on the excavated tunnel;

[0049] S2. Establish the relationship between gas pressure and the minimum outburst thickness of the rock mass according to the principle of energy ...

Embodiment 2

[0142] The Hongdoushan No. 1 inclined well gas and rock outburst out of the gas retrogradely out of the hole, after outburst, the residual CO in the formation water 2 The gas pressure is 0.2-0.3 MPa. Prominent gas is mainly CO 2 , followed by N 2 and O 2 , the associated gas has H 2 S, NH 3 , SO 2 , CO and other harmful gases, after sampling and indoor analysis, it was determined that the gas was a mixed-source gas of mantle origin and metamorphic origin.

[0143] The length of the protruding rock mass piled up in front of the tunnel face is up to 15m, with a total volume of 150m 3 The protruding rock mass is granitic mylonite, which is in the shape of loose silty sand and powder, mixed with gravel, the particle size of the stone is 10-20cm, and the color is dark gray. Granite mylonite, the rock strength is slightly lower, the joints and fissures are more developed, the closed joints are developed, the integrity of the rock mass is poor, there are many weak interlayers,...

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Abstract

The invention relates to the technical field of tunnel engineering, in particular to a non-coal stratum tunnel rock outburst safety thickness processing method based on an energy method.The system comprises the steps that S1, basic assumption limitation is conducted on a tunneled tunnel; s2, establishing a relational expression between the gas pressure and the minimum outburst prevention thickness of the rock mass according to an energy conservation principle; s3, calculating the gas pressure before outburst in an actual case according to an energy method; and S4, verifying the correctness of a calculation result through FLAC3D software. The problem that gas and rock outburst of a non-coal stratum cannot be effectively calculated in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a non-coal formation tunnel rock outburst safe thickness processing method based on an energy method. Background technique [0002] Explosion of gas and rock mass during tunnel construction can lead to the collapse of the tunnel face, and the protrusions invade the tunnel space, resulting in damage to the tunnel support structure and damage to construction machinery. A large amount of protruding gas may cause suffocation or even explosion. Coal and gas outburst are the most common outburst accidents in tunnel construction. There are a large number of studies on gas outburst in coal seam tunnels and some special technologies have been used to prevent coal and gas outburst in tunnel construction. To predict the costs caused by rock and gas outbursts in the hard coal deposit "NowaRuda Pole Piast Wacaw-Lech", a prediction model for the degree of gas and rock outbursts was ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06Q10/06G06Q50/02G06F111/10G06F111/04G06F113/08G06F119/14
CPCG06F30/28G06Q10/0635G06Q50/02G06F2111/10G06F2111/04G06F2113/08G06F2119/14
Inventor 苏培东邱鹏安兴玲李有贵何小培袁鸿
Owner CHENGDU SUDU GEOLOGICAL ENG CONSULTING CO LTD