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非开挖顶杆—扩孔铺管技术中顶杆力的确定
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作者 窦斌 蒋国盛 +1 位作者 侯树刚 易志宏 《地质科技情报》 CAS CSCD 北大核心 1999年第S1期30-31,共2页
论述了非开挖顶杆—扩孔铺管施工技术中顶杆力的计算方法,并成功地应用这一理论指导了工程实践。
关键词 非开挖 顶杆 铺管 顶杆力
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非开挖顶杆—扩孔铺管技术中顶杆力的确定 被引量:1
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作者 窦斌 侯树刚 《岩土钻凿工程》 1999年第2期84-85,共2页
论述了非开挖顶杆-扩孔铺管施工技术中顶杆力的计算问题,成功地应用这一理论指导了工程实践。
关键词 非开挖 顶杆 铺管 顶杆力 扩孔 管道铺设
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Φ50三辊联合穿轧机力能参数的测试与研究
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作者 申宝成 同宇权 《太原重型机械学院学报》 2000年第2期156-160,共5页
本文研究了Φ50三辊联合穿轧无缝钢管轧机的力能参数测试数据 ,介绍了其轧制压力和顶杆力等力能参数的测试方法 ,得出了各测定参数之间的数量关系式 ,发现了它们之间的定性关系。为该设备的使用和推广提供了依据。
关键词 三辊联合穿轧机 轧制 顶杆力 测试
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液压支架电液阀性能试验台测控系统设计 被引量:7
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作者 夏鹏 崔亚斌 刘庸奇 《液压气动与密封》 2014年第4期29-31,共3页
随着采煤技术的发展,液压支架电液控制系统被应用广泛。电磁先导阀是电液控制系统的核心组成部分,其性能对整个液压支架电液控制系统具有重要影响。电磁先导阀顶杆力与位移的关系直接决定电磁铁的设计选型,对电磁先导阀的性能有着决定... 随着采煤技术的发展,液压支架电液控制系统被应用广泛。电磁先导阀是电液控制系统的核心组成部分,其性能对整个液压支架电液控制系统具有重要影响。电磁先导阀顶杆力与位移的关系直接决定电磁铁的设计选型,对电磁先导阀的性能有着决定性的影响。 展开更多
关键词 液压支架 电液控制系统 电磁先导阀 顶杆力与位移
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Research into stope roof control of compound roof by solid backfilling mining 被引量:3
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作者 Gao Rui Zhang Jixiong +3 位作者 Spearing A.J.S. Li Meng An Baifu Hao Deyong 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第4期609-614,共6页
Based on the analysis of the failure characteristics and backfilling effect of the compound roof at 1801 backfilling workface in Taiyuan coal mine, China, we propose a method of controlling the pre- subsidence of a co... Based on the analysis of the failure characteristics and backfilling effect of the compound roof at 1801 backfilling workface in Taiyuan coal mine, China, we propose a method of controlling the pre- subsidence of a compound roof by using pre-stressed bolts to improve the backfilling ratio of the work- face so as to maintain the global stability of the stope roof. In addition, PHASE simulation software was employed to analyze the influence law of pre-stressing force, length, and interval on roof subsidence at the workface. On the basis of the numerical simulation results, a model for calculating the pre-stressing force and length of the bolts, the interval between the bolts, as well as roof subsidence at the workface, was established by using SPSS regression analysis software. Moreover, the research results were applied successfully to the 1801 filling workface. According to the monitoring data of roof closure, it was found that the final subsidence value for the goal roof was 350 mm and the filling ratio at the workface was 86%, which could fully meet the demand for safety production at the workface. The safe and effective control of the stope roof was therefore realized, which achieves the goal of safe and efficient backfilling mining under a compound roof. 展开更多
关键词 Compound roof Backfilling mining Stope Control
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A method for computing unsupported roof distance in roadway advancement and its in-situ application 被引量:2
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作者 Chen Yong Bai Jianbiao +2 位作者 Yan Shuai Hao Shengpeng Dao Viet Doan 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第4期551-556,共6页
A reasonable unsupported roof distance(URD) when advancing underground coal mine roadways can contribute greatly to safe and rapid roadway development.A mechanical model of the roof,using the relationship between the ... A reasonable unsupported roof distance(URD) when advancing underground coal mine roadways can contribute greatly to safe and rapid roadway development.A mechanical model of the roof,using the relationship between the roof stress distribution and URD,obtained by the difference method,and roof stability according to the in-situ roof stress and rock mass strength was developed.We subsequently designed a proper range of URD,developed a testing method of URD with the function of mining protection,evaluated roof stability through analyzing the test data and then determined a reasonable URD.Considering the factors of the geological conditions,the immediate roof stability and the efficiency of the labor arrangement system,the URD of the advancing roadway of 9802 working face in Zhangshuanglou coal mine was determined to be 6 m using the proposed method.The results show that,when a 2 m length of roadway was reinforced by temporary support and high pre-stressed bolt support after the roadway advancement of 6 m per cycle,the speed and the security of the roadway development can be achieved and the advance rate can reach more than 400 m per month. 展开更多
关键词 Unsupported roof distance (URD)Roadway advancement Difference method Roof stress Drivage per cycle Unsupported roof distance test
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