ZANG J C，LI D H，ZHANG L，et al.Research on optimization method for excavation sequence of deep chamber group［J］.Journal of Henan Polytechnic University（Natural Science），doi:10.16186/j.cnki.1673-9787.2023100063

doi: doi:10.16186/j.cnki.1673-9787.2023100063

Received：2023-10-30

Revised：2024-03-08

Online：2024-09-28

Research on optimization method for excavation sequence of deep chamber group

ZANG Jincheng¹，LI Donghao²，ZHANG Lu¹，SUN Lingfeng²，HUANG Yubing²

（1.Wanfu Energy Company Limitied of Yanzhou Coal， Heze， 274922， Shandong， China；2.State Key Laboratory for Geo-mechanics and Deep Underground Engineering， China University of Mining & Technology （Beijing）， Beijing 100083， China）

Abstract: [Objective] In order to reduce the mutual disturbance caused by excavation of deep chambers, [Methods] This paper taked Wanfu Coal Mine， a coal mine under construction in the extremely thick alluvium， as the engineering background. Established quantitative evaluation indicators such as surrounding rock characterization deformation and cavern excavation mutual disturbance degree. Based on the overall optimization principle of " the overall deformation of chamber group is the main factor， and the mutual interference degree of excavation between roadways is the secondary factor "， a method for evaluating and optimizing the excavation sequence of deep chamber group was proposed. Numerical experimental studies on excavation of deep chamber alone and excavation sequence of chamber groups are carried out. [Results] The characteristic deformation of belt head roadway is 416.2 mm， and that of main shaft contact roadway is only 58.6 mm. The total interference degree of excavation is 286.38 in scheme 3 and 456.20 in Scheme 5， which is reduced by 37.22% compared with Scheme 5. By using this evaluation and optimization method， it is determined that the overall surrounding rock deformation and excavation disturbance of the chamber group in Scheme 3 are the smallest， which is the best excavation scheme. The weighted total score of this scheme is 11， and the sum of the characteristic deformation increments of each chamber is 178 mm， and the excavation interference is reduced by 30.26% compared with the largest excavation scheme. The scientific validity of the method has been verified. [Conclusion] It is found that the deformation of the chamber has the characteristic of non-uniformity. The larger the section size of the chamber， the more obvious the unloading of surrounding rock and the greater the degree of stress release are clarified. The optimal excavation scheme of deep chamber group in Wanfu Coal Mine is determined by evaluation and optimization method.

Key words: deep chamber group；optimization of excavation sequence；surrounding rock characterization deformation；excavation interference degree；evaluation and optimization method

CLC: