Deformation mechanism of roadways in deep soft rock at Hegang Xing’an Coal Mine  

作　　者：Yang Xiaojie Pang Jiewen Liu Dongming Liu Yang Tian Yihong Ma Jiao Li Shaohua 

机构地区：[1]State Key Laboratory of Geomechanics and Deep Underground Engineering [2]School of Mechanics and Civil Engineering, China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》2013年第2期307-312,共6页矿业科学技术学报（英文版）

基　　金：partially supported by program for the New Century Excellent Talents in University (No. NCET-08-0833);the National Natural Science Foundation of China (No. 41040027);the Special Fund of Basic Research and Operating Expenses of China University of Mining and Technology, Beijing

摘　　要：Engineering geomechanics characteristics of roadways in deep soft rock at Hegang Xing'an Coal Mine were studied and the nature of clay minerals of roadway surrounding rock was analyzed. This paper is to solve the technical problems of high stress and the difficulty in supporting the coal mine, and provide a rule for the support design. Results show that mechanical deformation mechanisms of deep soft rock roadway at Xing'an Coal Mine is of ⅠABⅡABCⅢABCD type, consisting of molecular water absorption (the ⅠAB -type), the tectonic stress type + gravity deformation type + hydraulic type (the ⅡABC -type), and the ⅢABCD -type with fault, weak intercalation and bedding formation. According to the compound mechanical deformation mechanisms, the corresponding mechanical control measures and conversion technologies were proposed, and these technologies have been successfully applied in roadway supporting practice in deep soft rock at Xing'an Coal Mine with good effect. Xing'an Coal Mine has the deepest burial depth in China, with its overburden ranging from Mesozoic Jurassic coal-forming to now. The results of the research can be used as guidance in the design of roadway support in soft rock.Engineering geomechanics characteristics of roadways in deep soft rock at Hegang Xing’an Coal Mine were studied and the nature of clay minerals of roadway surrounding rock was analyzed. This paper is to solve the technical problems of high stress and the difficulty in supporting the coal mine, and provide a rule for the support design. Results show that mechanical deformation mechanisms of deep soft rock roadway at Xing’an Coal Mine is of ⅠABⅡABCⅢABCD type, consisting of molecular water absorption (the ⅠAB -type), the tectonic stress type + gravity deformation type + hydraulic type (the ⅡABC -type), and the ⅢABCD -type with fault, weak intercalation and bedding formation. According to the compound mechanical deformation mechanisms, the corresponding mechanical control measures and conversion technologies were proposed, and these technologies have been successfully applied in roadway supporting practice in deep soft rock at Xing’an Coal Mine with good effect. Xing’an Coal Mine has the deepest burial depth in China, with its overburden ranging from Mesozoic Jurassic coal-forming to now. The results of the research can be used as guidance in the design of roadway support in soft rock.

关 键 词：Deep Clay mineral Engineering soft rock type Deformation mechanics mechanism 

分 类 号：TD353[矿业工程—矿井建设]