Method for determining jointed rock mass roadway axis strike

A determination method and technology of fractured rock mass, applied in the field of determination of the axial direction of rocky underground engineering roadway, can solve the problems of representative structural face group selection and evaluation indicators that are not objective and scientific enough, and achieve the effect of accurate selection

Inactive Publication Date: 2014-04-09
广西华锡集团股份有限公司
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing representative structural face group selection and evaluation indicators that are not objective and scientific enough, to overcome the theoretical defects of the infinite extension of cracks in the key block theory, and to determine a more accurate and reasonable fracture rock Method for Determining the Axis Trend of Body Roadway

Method used

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  • Method for determining jointed rock mass roadway axis strike
  • Method for determining jointed rock mass roadway axis strike
  • Method for determining jointed rock mass roadway axis strike

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Embodiment Construction

[0021] The method for determining the axial direction of the roadway of the fractured rock mass described in the present invention, the embodiment is illustrated by taking a part of the mine section test area of ​​a domestic mine as an example, and the specific operation steps and implementation process are as follows:

[0022] 1. Engineering geological survey

[0023] The engineering geological survey of the structural plane survey method in the test area was carried out through the precise survey network method. The collected engineering raw data include: the shape, size and direction of the roadway section are shown in Table 1; the spatial coordinates, occurrence, trace length, and opening degree of the structural plane ; See Table 2 for the viscosity coefficient and internal friction angle in the mechanical parameters of the structural surface.

[0024] Table 1 Basic conditions of the test area

[0025]

[0026] 2. Selection of representative structural quilts

[0027...

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Abstract

Provided is a method for determining a jointed rock mass roadway axis strike. The method includes the first step of utilizing a General Block program to establish a roadway model and selecting three sets of representative structure planes according to roadway cross section shapes and geometrical parameters obtained through engineering geological surveys, the second step of utilizing an Unwedge program to establish a roadway model and carrying out block computation, and the third step of outputting an information map of the number of blocks directly dropping and the minimum safety factor of the blocks when the roadway is located within 0-180 degrees in the axial direction, and determining the optimum jointed rock mass roadway axis strike with the minimum number of the blocks directly dropping and the minimum safety factor as evaluation indexes. According to the method for determining the jointed rock mass roadway axis strike, the defect that in the prior art, selection of jointed rock mass representative structure planes is unscientific is overcome, the evaluation indexes for determining the optimum jointed rock mass roadway axis strike are improved, and selection of the optimum jointed rock mass roadway axis strike can be accurate and reasonable.

Description

technical field [0001] The invention relates to a method for determining the axial direction of a rock underground engineering roadway, in particular to a method for determining the axial direction of a cracked rock mass roadway. Background technique [0002] Roadway engineering is indispensable in underground engineering, and its stability will directly affect production safety and economic benefits. In the process of roadway engineering design, the axis direction and section shape of the roadway are the core, and the choice of the direction of the roadway axis is strategic to the roadway engineering layout. Once the selection is difficult to change, it will directly affect the safe excavation and long-term use of the roadway. engineering attention. In engineering design, engineers often carry out analogy design according to the ore body trend according to personal experience. If the direction of the axis of the roadway designed in this way is improperly selected, it may ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00
Inventor 吴乐文陈庆发曾勰张亚南周永亮
Owner 广西华锡集团股份有限公司
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