US 12,235,257 B2
Method of analyzing influencing factors of contribution rate of elastic energy of top plate during catastrophe of coal body
Chenglin Tian, Qingdao (CN); Qianting Hu, Qingdao (CN); Haitao Sun, Qingdao (CN); and Xusheng Zhao, Qingdao (CN)
Assigned to SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Qingdao (CN)
Appl. No. 18/571,358
Filed by SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Qingdao (CN)
PCT Filed Jan. 9, 2023, PCT No. PCT/CN2023/071382
§ 371(c)(1), (2) Date Dec. 18, 2023,
PCT Pub. No. WO2023/138431, PCT Pub. Date Jul. 27, 2023.
Claims priority of application No. 202210063523.5 (CN), filed on Jan. 20, 2022.
Prior Publication US 2024/0361294 A1, Oct. 31, 2024
Int. Cl. G01N 33/22 (2006.01); G01N 3/00 (2006.01); G06F 30/20 (2020.01)
CPC G01N 33/222 (2013.01) [G01N 3/00 (2013.01); G01N 2203/0032 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A method of analyzing influencing factors of a contribution rate of elastic energy of a top plate during catastrophe of a coal body, comprising the following steps:
Step 1, calculating the contribution rate of the elastic energy of the top plate:
(S1) obtaining gas-containing coal seam gas pressure p;
(S2) according to a drilling histogram, obtaining gas-containing coal seam thickness hc and top plate thickness hr;
(S3) coring the gas-containing coal seam and the top plate, processing the core into a standard test piece, and obtaining, by means of a mechanical test, elastic moduli Er of the top plate and elastic moduli Ec of the coal seam under the influence of the gas pressure p, respectively;
(S4) calculating the contribution rate n of the elastic energy of the top plate according to the data obtained in step (S1) to step (S3),

OG Complex Work Unit Math
in formula (1), A is a correction factor, and 0<λ≤1; hr and hc, Er and Ec satisfy formula (2):

OG Complex Work Unit Math
in formula (2), m>0 and n>0; substituting formula (2) into formula (1) to obtain:

OG Complex Work Unit Math
Step 2, analyzing the influence factor of the contribution rate of the elastic energy of the top plate:
according to formula (3), analyzing the influence of m and n on the contribution rate η of the elastic energy of the top plate, wherein the following two situations are configured:
situation 1: the influence of the same m but different n on η;
situation 2: the influence of the same n but different m on η;
obtaining the comprehensive influence of m and n on the contribution rate η of the elastic energy of the top plate according to situation 1 and situation 2 respectively.