In Situ tests to Determine the Ground Pressure Existing in a Soft Rock Mass by Use of Hydraulic Borehole Cells.

使用液压钻孔单元确定软岩体中存在的地面压力的现场测试。

• 批准号: 08555254
• 负责人: YAMASHITA Shigeru
• 金额: $ 2.94万
• 依托单位: AKITA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555254/
• 关键词: Soft rock; Ground pressure; In situ measurement; Ground pressure in soft rock; Hydraulic borehole cell; Cracks of rock

In situ tests are conducted for adopting the measuring system of ground pressure existing in a soft rock mass by use of hydraulic borehole cells, which had been developed by Dr.P.H.Lu in U.S.Bureau of Mines.This system is consisted from a set of hydraulic borehole pressure cells and hydraulic pressure gauge, hydraulic pressure pomp. And the borehole pressure cells are consisted from a cylindrical pressure cell (CPC) and two flat type pressure cells (BPC).This projects were held by two years. At the first year, physical and mechanical properties of these pressure cells were measured and the properties were re-arranged by these measurements. And at the second year, in situ measurement of ground pressure were conducted by two rock mass sites, the one was on an rock pillar in underground pit (volcanic tuff, covered rock = 120m), and the other was underground drift face of a coal mine (shell, covered rock = 600m).The measured ground pressures of these sites were nearly equal to calculated value of theoretically. But, there were some troubles on a working of inserting the pressure cells in the drilled borehole, when inner wall of the boreholes were not smooth by the large or small cracks in the rock mass.

采用美国矿务局P.H.Lu博士开发的利用液压钻孔单元测量软岩体地压的系统进行了现场试验。该系统由一套液压钻孔单元组成。钻孔压力传感器和液压压力表，液压盛况。钻孔压力传感器由一个圆柱形压力传感器（CPC）和两个扁平型压力传感器（BPC）组成。该项目历时两年。第一年，测量了这些压力单元的物理和机械特性，并通过这些测量重新排列了特性。第二年，在两个岩体场地进行了地压原位测量，一个是在地下坑的岩柱上（火山凝灰岩，覆盖岩=120m），另一个是煤矿地下巷道工作面矿井（外壳、覆盖岩石=600m）。这些地点的实测地压与理论计算值基本相等。但是，当岩体中或大或小的裂缝导致钻孔内壁不光滑时，将压力传感器插入钻孔中的工作存在一些麻烦。

项目成果

S.YAMASHITA,F.SUGIMOTO,K.KAWABE,H.KATO,M.ONOZAWA: "In Situ Test for Applying the Hydraulic Borehole Pressure Cells." Proceedings of Spring Meeting of MMIJ. (In printing). (1998)

S.YAMASHITA、F.SUGIMOTO、K.KAWABE、H.KATO、M.ONOZAWA：“应用液压钻孔压力单元的现场测试。”

山下 秀, 杉本 文男, 川辺 金光, 加藤 春寛, 小野沢 益信: "油圧カプセル方式による地圧測定法の実用化導入試験" 資源・素材学会1998年春季大会一般発表(研究・業績発表)講演要旨集. (未定). (1998)

Hide Yamashita、Fumio Sugimoto、Kanemitsu Kawabe、Haruhiro Kato、Masunobu Onozawa：“使用液压胶囊法的地面压力测量方法的实用介绍测试”日本资源与资源学会 1998 年春季会议综合报告（研究和成果报告）摘要材料科学集（待定）（1998）。

山下 秀, 杉本 文男, 川辺 金光, 加藤 春實, 小野沢益信: "油圧カプセル方式による地圧測定法の実用化導入試験" 資源・素材学会1998年春季大会 一般発表(研究・業績発表)講演要旨集. (未定). (1998)

Hide Yamashita、Fumio Sugimoto、Kanemitsu Kawabe、Harumi Kato、Masunobu Onozawa：“使用液压胶囊法的地面压力测量方法的实际实施测试”日本学会 1998 年春季会议上的一般报告（研究/成果报告）摘要资源和材料（待定）。