RQDt anisotropy solving method based on BQ and optimal threshold t
An anisotropy and optimal threshold technology, applied in the field of RQDt anisotropy solution method, can solve the problem that RQD anisotropy cannot be reflected, RQD anisotropy solution method has not been obtained, RQD anisotropy calculation formula has not been obtained, etc. question
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[0151] The present invention will be further described below with reference to the accompanying drawings.
[0152] refer to Figure 1 to Figure 4 , a BQ-based RQD with an optimal threshold t t An anisotropic solution method, including the following steps:
[0153] 1) Calculation of rock mass quality based on BQ index, the process is as follows:
[0154] 1.1: Calculate the rock mass integrity coefficient according to structural surface parameters, the formula is as follows:
[0155]
[0156] In the formula: Jv is the number of rock mass volume joints, unit bar / m 3 ;
[0157] 1.2: The calculation formula of Jv is as follows:
[0158]
[0159] In the formula: L1, L2, ..., Ln are the lengths of the measuring lines perpendicular to the structural plane; N1, N2, ..., Nn are the number of structural planes in the same group;
[0160] 1.3: Calculate the BQ value according to the uniaxial compressive strength value of the rock and the integrity coefficient value of the rock...
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