Influence of Sedimentary Environment on the Structural Characteristics of Rock Layers Surrounding Roadways

TY - JOUR

T1 - Influence of Sedimentary Environment on the Structural Characteristics of Rock Layers Surrounding Roadways

AU - Dou, Zhongsi

AU - Zhang, Zhenghai

AU - Han, Ruili

AU - Wang, Yimeng

N1 - Publisher Copyright: © 2025 School of Science, DUTH. All rights reserved.

PY - 2025

Y1 - 2025

N2 - The deformation and failure of rocks surrounding roadways mainly depend on the strength and stress of the rocks. The strength of surrounding rocks is closely related to their structure. A reasonable study of the structural characteristics of rocks surrounding roadways is of great significance to the safe production of mines. To investigate the structural characteristics of roadway surrounding rock strata, this work selected the floor strata of the main mining coal seam of the Luling Mine in Huaibei, Anhui, China as the research subject. The lithology of the strata revealed by boreholes along major exploration lines and representative primary sedimentary structures in the study area was interpreted through sedimentary structure analysis. Subsequently, the thickness, properties, and structural features of various lithologies between No.8 coal seam floor and No.10 coal seam roof in the Luling Mine were systematically analyzed using data from 75 boreholes. The rock mass structure types in the study area were classified in accordance with the uniaxial compressive strength categorization of coal measure rock test specimens. Results demonstrate that: A delta system coal-bearing rock series dominated by river action is deposited in the Luling mining area. The total thickness of the main coal seam is 64.00~119.00 m, with an average of 82.32 m. Specifically, the thickness of sandstone is about 5.00~62.40 m, with an average of 33.77 m; the thickness of mudstone is about 19.80~91.00 m, with an average of 48.55 m; the sandstone content is 6.00%~75.00%, with an average of 41.00%; the mudstone content is 25.00%~94.00%, with an average of 59.00%. The coal seam floor is divided into two types of sedimentary rock layer structure, i.e., the whole mudstone type and the sand mudstone interbedded type. The whole mudstone type is interdistributary bay-crevasse splay model deposition, mud sand combination, which belongs to soft rock mass. The sand-mudstone interbedded type is a flooded basin-distributary channel model deposition, sand-mud combination, which belongs to medium-hard rock mass. Two engineering geological models of whole mudstone type and sand-mudstone interbedded type are established. The proposed study results provides foundational research data for analyzing the deformation mechanisms of roadways and their support.

AB - The deformation and failure of rocks surrounding roadways mainly depend on the strength and stress of the rocks. The strength of surrounding rocks is closely related to their structure. A reasonable study of the structural characteristics of rocks surrounding roadways is of great significance to the safe production of mines. To investigate the structural characteristics of roadway surrounding rock strata, this work selected the floor strata of the main mining coal seam of the Luling Mine in Huaibei, Anhui, China as the research subject. The lithology of the strata revealed by boreholes along major exploration lines and representative primary sedimentary structures in the study area was interpreted through sedimentary structure analysis. Subsequently, the thickness, properties, and structural features of various lithologies between No.8 coal seam floor and No.10 coal seam roof in the Luling Mine were systematically analyzed using data from 75 boreholes. The rock mass structure types in the study area were classified in accordance with the uniaxial compressive strength categorization of coal measure rock test specimens. Results demonstrate that: A delta system coal-bearing rock series dominated by river action is deposited in the Luling mining area. The total thickness of the main coal seam is 64.00~119.00 m, with an average of 82.32 m. Specifically, the thickness of sandstone is about 5.00~62.40 m, with an average of 33.77 m; the thickness of mudstone is about 19.80~91.00 m, with an average of 48.55 m; the sandstone content is 6.00%~75.00%, with an average of 41.00%; the mudstone content is 25.00%~94.00%, with an average of 59.00%. The coal seam floor is divided into two types of sedimentary rock layer structure, i.e., the whole mudstone type and the sand mudstone interbedded type. The whole mudstone type is interdistributary bay-crevasse splay model deposition, mud sand combination, which belongs to soft rock mass. The sand-mudstone interbedded type is a flooded basin-distributary channel model deposition, sand-mud combination, which belongs to medium-hard rock mass. Two engineering geological models of whole mudstone type and sand-mudstone interbedded type are established. The proposed study results provides foundational research data for analyzing the deformation mechanisms of roadways and their support.

KW - Crevasse splay

KW - Distributary channel

KW - Flood basin

KW - Sedimentary environment

UR - https://www.scopus.com/pages/publications/105007299494

U2 - 10.25103/jestr.182.06

DO - 10.25103/jestr.182.06

M3 - Article

AN - SCOPUS:105007299494

SN - 1791-9320

VL - 18

SP - 41

EP - 48

JO - Journal of Engineering Science and Technology Review

JF - Journal of Engineering Science and Technology Review

IS - 2

ER -