Research on In-situ Stress Measurement and Roadway Support Design in Coal Seam

Jiyu Zhao

doi:10.54691/17ysjq19

Authors

Jiyu Zhao

DOI:

https://doi.org/10.54691/17ysjq19

Keywords:

Coal Mine; In-situ Stress Measurement; Core Stress Resolution Method; Roadway Support; Numerical Simulation.

Abstract

Based on the existing situation of No.3 Coal Seam in Hengxing coal mine, the in-situ stress measurement was carried out at the two measuring points of the main inclined shaft bottom yard and the track roadway by using the core stress relief method, and the in-situ stress distribution characteristics of the measuring point area were obtained. Based on the measurement results, the numerical simulation software was used to simulate the support design of No. 3 coal seam roadway, and the deformation of roadway surrounding rock under different support methods and parameters was analyzed. The results show that the in-situ stress field in the second mining area of No.3 Coal Seam in Hengxing coal mine is mainly horizontal stress, the average maximum horizontal principal stress is 3.88MPa, and the average azimuth is 129°. The roadway support simulation shows that the bolt+anchor cable support method can effectively control the deformation of surrounding rock, and the displacement of roof and floor and two sides can be controlled within 100mm, meeting the production requirements. This study provides an important reference for the safe mining of No.3 coal seam in Hengxing coal mine.

Downloads

Download data is not yet available.

References

[1] Dong Jun, Wu Yunjie, Si Huaru, et al. Deformation Characteristics and Surrounding Rock Stability Control of Soft Rock Roadway under High Structural Stress in Xin'an Coal Mine[J]. China Mining Magazine, 2024, 33(08): 147-157.

[2] Wang Wenfei, Gao Baobin, Zhang Longyang, et al. Research on the Mechanism and Technology of Coordinated Integrated Control of Surrounding Rock in High-Stress Soft Rock Roadway[J]. Coal Engineering, 2024, 56(11): 103-109.

[3] Yue Xizhan, Yang Ziyi, Li Yingfu, et al. Surrounding Rock Control and Support Design for Deep High-Stress Roadways[J]. Coal Technology, 2024, 43(06): 37-42.

[4] Wang Chuanying, Wang Yiteng, Han Zengqiang, et al. Research on In-Situ Stress Measurement Method Based on Borehole Morphology Analysis[J]. Rock and Soil Mechanics, 2019, 40(S1): 549-556.

[5] Zhao Shankun, Gao Guiyun, Wang Chenghu, et al. Small-Diameter Cone-Type Bottom Hole Overcoring Stress Relief Method and Experimental Research[J]. Journal of China Coal Society, 2021, 46(S1): 74-83.

[6] Liu Xiangyang, Liu Yonghao, Zhang Shunfeng, et al. In-Situ Stress Measurement and Stress Field Characteristics Analysis in Maiduoshan Coal Mine[J]. China Safety Science Journal, 2023, 33(S2): 91-95.

[7] Ding Lipei, Tang Tao, Liu Guoqing. Research on Roadway Support Parameter Design Based on In-Situ Stress[J]. China Energy and Environmental Protection, 2019, 41(06): 113-116.

[8] Bai Xinyuan, Gao Dengyan, Chen Jianhua. Research on Roadway Layout and Support under Shallow and Extremely Close Goaf[J]. Coal Engineering, 2025, 57(01): 52-59.

[9] Sun Xiaodong, Zhang Yi. Research on Secondary Support Timing and Support Parameter Optimization for Deep High-Stress Roadways[J]. Coal, 2025, 34(01): 18-22.

[10] Li Yang, Huang Wenlong. Application of Overcoring Stress Relief Method in In-Situ Stress Measurement of a Deep-Buried Tunnel[J]. Journal of Hebei GEO University, 2021, 44(03): 92-97.

[11] Wu Peinan, Zhang Qiang, Li Yapeng, et al. Calibration Analysis of Elastic Modulus of Eccentric Core in In-Situ Stress Measurement by Stress Relief Method[J]. Chinese Journal of Rock Mechanics and Engineering, 2024, 43(12): 2956-2967.