Author:
Han Xu,Qin Zhe,Han Ji-huan,Yang Wei-hao,Liu Yong-de,Zhang Jian
Abstract
AbstractMany shafts in China have experienced large deformations in the deep soil Strata, which has had a significant impact on mining safety. This study conducted a geotechnical model test called the seepage force model to address the deformation issues of shafts caused by mining solid mineral resources in regions with deep soil strata. This test simulated the impact of mining disturbance on shaft deformation within the soil section. The simulation utilized monitoring data from the model shaft, facilitating the determination of deflection displacements across different protection areas. The findings indicated a nearly linear relationship between the maximum horizontal displacement of the shaft and the mining coal seam thickness. The shaft protection areas within the soil section were reconfigured by modifying the movement angle from 45° to 37.6°. Consequently, the maximum horizontal displacements of the prototype shaft decreased to 73.8, 112.7, and 170.9 mm for mining coal thicknesses of 2.7, 5.3, and 8.0 m, respectively. These values represent 26%, 24.6%, and 26.7% reductions from the original design shaft displacements. When combined with the probability integral method, the simulation test results concerning the shaft protection rock pillars were exhaustively examined. This analysis paves the way for a more logical and reliable design approach for shaft protection rock pillars in areas characterized by deep soil and thin rock strata. The study findings hold immense significance in effectively mitigating and managing mining-induced subsidence disasters and ensuring the optimal design of shaft protection zones.
Funder
Youth Innovation Team of Shandong Higher Education Institutions
Natural Science Foundation of Shandong Province
the Open Foundation of Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation
Publisher
Springer Science and Business Media LLC
Reference24 articles.
1. Wu Q, Tu K, Zeng YF, Liu SQ. Discussion on the main problems and countermeasures for building an upgrade version of main energy (coal) industry in China. J China Coal Soc. 2019;44(6):1625–36. https://doi.org/10.13225/j.cnki.jccs.2019.0387.
2. Publicity and Education Centre of the State Administration of Work Safety. Training and assessment materials for main hoist driver operator qualification. 2nd ed. Xuzhou: China University of Mining and Technology Press; 2011.
3. Yu Q, Ikuta S, Shimada H, Matsui K. Application of underground continuous impervious curtain to shaft lining rupture treatment in Eastern Chinese coal mines. Mem Fac Eng Kyushu Univ. 2012;72(2):39–53.
4. Jia YD, Stace R, Williams A. Numerical modelling of shaft lining stability at deep mine. Min Technol. 2013;122(1):8–19. https://doi.org/10.1179/1743286312Y.0000000022.
5. Han JH, Zou JQ, Hu CC, Yang WH. Study on size design of shaft protection rock/coal pillars in thick soil and thin rock strata. Energies. 2019;12(13):2553. https://doi.org/10.3390/en12132553.