巨厚覆岩下开采地表沉陷特征及其与采矿灾害的相关性

Correlation of ground surface subsidence characteristics and mining disasters under super-thick overlying strata

对新汶矿业集团华丰煤矿巨厚覆岩下开采引起的地表变形观测数据进行分析,给出了华丰矿区地表变形特征.巨厚覆岩下开采地表存在连续性变形的下沉与反弹,以及非连续性变形的地表斑裂现象.地表斑裂是华丰井田巨厚覆岩下开采出现的典型地表破坏形式.对地表变形参量与冲击地压、矿井工作面涌水量关系进行了分析,表明地表变形与冲击地压及工作面涌水量之间存在相关性.提出利用地表变形参量作为相关灾害与预测的辅助指标,可提高矿井灾害预测的准确性.

Through analyzing surface deformation observation data under super-thick overlying strata in Huafeng Coal Mine, pointed out the ground surface deformational characteristics. It has two kinds of forms ： subsidence, rebound of continuous deformation, and surface cracks of discontinuous deformation. Surface cracks are the typical failure mode in Huafeng Mine Field. By analyzing the relationship of surface deformation parameters, rock burst and water inflows of working faces, the correlation of them was found. The surface deformation parameters can be as the auxiliary index to forecast the mining disasters and improve the prediction accuracy.