Wanfu Energy Company Limitied of Yanzhou Coal
State Key Laboratory for Geo-mechanics and Deep Underground Engineering, China University of Mining & Technology (Beijing)

目的目的为了减少深部硐室群开挖时引起的相互扰动,方法方法以巨厚冲积层在建矿井——万福煤矿为工程背景,建立围岩表征变形量和硐室开挖互扰度等定量评价指标。基于“硐室群整体表征变形量最小为主,巷道间开挖互扰度最小为次”的总体优选原则,提出深部硐室群开挖次序评判优选方法,开展深部硐室单独开挖和硐室群不同开挖次序的数值试验研究。结果结果结果表明:胶带机机头硐室围岩表征变形量高达416.2mm,主井联络巷围岩表征变形量仅有58.6mm。开挖互扰度总量最低为286.38,最高为456.20;利用该评判优选方法确定硐室群整体围岩表征变形量和开挖扰动程度最小的方案,为最优开挖方案;该方案加权总分为11,各硐室表征变形增量之和为178mm,开挖互扰度比最大的开挖方案降低了30.26%,该评判优选方法的科学有效性得到了验证。结论结论发现了硐室的变形具有非均匀性的特点,明确了硐室断面尺寸越大,围岩卸荷越明显,应力释放程度越大的影响规律,通过评判优选方法确定了万福煤矿深部硐室群的最优开挖方案。

Objectives To reduce the mutual disturbances caused by the excavation of deep chamber groups. Methods This study uses Wanfu Coal Mine, a mine under construction in a region with extremely thick al⁃luvial layers, as the engineering background. Quantitative evaluation indicators, such as surrounding rock deformation and excavation-induced mutual disturbance degree, were established. Based on the overall opti⁃mization principle of minimizing the total deformation of the chamber group as the primary objective and minimizing the mutual disturbance between excavations as the secondary objective, a method for evaluating and optimizing the excavation sequence of deep chamber groups was proposed. Numerical simulations were conducted to investigate the excavation of individual chambers and various excavation sequences for the chamber groups. Results The surrounding rock deformation at the belt conveyor head chamber reached 416.2 mm, while the main shaft contact roadway exhibited a deformation of only 58.6 mm. Scheme 3 dem⁃onstrated the lowest total excavation disturbance degree (286.38), which was 37.22% lower than that of Scheme 5 (456.20). Using the proposed evaluation and optimization method, Scheme 3 was identified as the optimal excavation scheme, with the smallest overall deformation of surrounding rock and the least exca⁃vation disturbance. The weighted total score of Scheme 3 was 11, and the cumulative deformation incre⁃ment of all chambers was 178 mm, representing a 30.26% reduction in excavation interference compared to the least optimal scheme. The scientific validity of the proposed method was verified. Conclusions The study revealed the non-uniformity of chamber deformation and clarified that larger chamber cross-sectional dimensions lead to more pronounced unloading of surrounding rock and greater stress release. The evalua⁃tion and optimization method successfully identified the optimal excavation sequence for the deep chamber groups in Wanfu Coal Mine.

国家自然科学基金资助项目(42307213)

臧金诚,李东浩,张鲁,等.深部硐室群开挖次序优化方法研究[J].河南理工大学学报(自然科学版),2025,44(2):10⁃18.

ZANG J C, LI D H, ZHANG L, et al. Research on optimization method for excavation sequence of deep chamber groups[J]. Journal of Henan Polytechnic University (Natural Science), 2025, 44(2): 10-18.