摘要
通过对亭南煤矿采空区上方发育的地裂缝进行详细调查,对地裂缝的发育特征进行了归类。通过分析认为地裂缝的发育主要受地形地貌、降雨、上覆基岩厚度、松散层厚度等因素的影响,位于斜坡上的裂缝规模明显大于塬面上的裂缝,斜坡使地裂缝的规模加剧,滑移加大,降雨顺着裂缝灌入,使松散层力学性质发生变化,强度降低,使裂缝规模短时间加剧,上覆基岩厚度的增加,稳定性增加,对地表的影响程度减小,裂缝发育程度减小;松散层力学性质差,抗变形能力较差,松散层厚度越大,地表裂缝越发育。建议留出保安煤柱,控制开采厚度,加强顶板管理,以减少地裂缝等矿山工程地质问题发生。
Based on the detailed investigation of the ground cracks above the mined-out area in Tingnan Coal Mine,the development characteristics of the ground cracks are classified.By analyzing viewed the development of ground cracks are mainly affected by topography,rainfall,the thickness of the overlying rock,loose bed thickness,the influence of such factors as the slope is bigger than the size of the cracks of the crack in the table-land,exacerbated the size of the ground cracks,slope sliding,rainfall along the crack down,change the loose bed mechanical properties,strength is reduced,the crack size in a short period of time,as the thickness of overlying bedrock increases,the stability increases,the influence on the surface decreases,and the degree of fracture development decreases;the loose bed has poor mechanical properties and poor deformation resistance,the greater the thickness of the loose bed,the more developed surface cracks.It is suggested to set aside safety coal pillar,control mining thickness and strengthen roof management to reduce the occurrence of mine engineering geological problems such as ground cracks.
作者
张晔
田增辉
祁宇璇
ZHANG Ye;TIAN Zenghui;QI Yuxuan(Shaanxi 186 Coalfield Geology Co. , Ltd. , Xi’an 710065, China)
出处
《陕西煤炭》
2022年第4期63-67,共5页
Shaanxi Coal
关键词
亭南煤矿
地裂缝
地形地貌
降雨
上覆基岩厚度
松散层厚度
Tingnan Coal Mine
ground cracks
topography
rainfall
the thickness of the overlying rock
loose bed thickness
