粉煤灰陶粒混凝土煤矿井下支护试验研究  

Feasibility test on underground coal mine support with fly ash ceramisite concrete

作　　者：李云鹏 苏怀瑞 赵善坤 黄春慧 王玉 LI Yun-peng;SU Huai-rui;ZHAO Shan-kun;HUANG Chun-hui;WANG Yu(Engineering Laboratory of Deep Mine Rockburst Disaster Assessment,Jinan 250100,China;Mine Safety Technology Branch,China Coal Research Institute,Beijing 100013,China;Shandong Province Research Institute of Geophysical Survey Team,Jinan 250100,China;Shandong Province Research Institute of Coal Geology Planning and Exploration,Jinan 250100,China)

机构地区：[1]山东省深部冲击地压灾害评估工程实验室,山东济南250100 [2]煤炭科学技术研究院有限公司安全分院,北京100013 [3]山东省煤田地质规划勘察研究院,山东济南250100 [4]山东省煤田地质局物探测量队,山东济南250100

出　　处：《煤炭工程》2021年第6期113-117,共5页Coal Engineering

基　　金：国家重点研发计划资助项目(2017YFC0804201);山东省深部冲击地压灾害评估工程实验室开放项目(鲁煤研开(2020)004号)。

摘　　要：通过试配LC20强度粉煤灰陶粒混凝土,在实验室内进行了混凝土抗压强度及弹性模量测试,对比分析了粉煤灰陶粒混凝土与普通混凝土的力学性能,确定了井下锚喷支护配合比方案,并按照该方案在寸草塔一矿进行了现场工业性试验。结果表明:实验室内试配LC20强度粉煤灰陶粒混凝土28d强度可达29.6MPa;粉煤灰陶粒混凝土的弹性模量较小,更能适应井下巷道支护条件;现场工业性试验喷射的粉煤灰陶粒混凝土在井下养护28d强度可达29.9MPa,支护效果良好,具有较高的可行性。研究成果可为粉煤灰陶粒混凝土在煤矿的应用提供理论依据和施工经验。LC20 strength grade fly ash ceramisite concrete was deployed. The uniaxial compressive strength and elasticity modulus of the concrete were tested in the laboratory. The mechanical properties of fly ash ceramsite concrete and ordinary concrete were compared and analyzed. The mixing ratio scheme of bolting and shotcreting support underground was determined. Then, the field industrial test was carried out in Cuncaota No.1 Coal Mine according to this mixing ratio scheme. The results show that, uniaxial compressive strength of the LC20 strength grade concrete fly ash ceramisite concrete can reach 29.6 MPa in 28 days. The elasticity modulus of fly ash ceramisite concrete is smaller than the ordinary concrete, and it is more adaptable to the support conditions of coal mine roadways. The uniaxial compressive strength of the fly ash ceramisite concrete shotcreted in the field can reach 29.9 MPa. The support effect of fly ash ceramisite concrete is favorable and it has high feasibility. The research results will provide theoretical basis and construction experience for the application of fly ash ceramisite concrete in coal mine.

关 键 词：粉煤灰陶粒混凝土 巷道支护 锚喷支护 抗压强度 弹性模量 

分 类 号：TD353[矿业工程—矿井建设]