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Rock weathering speed measurement method

A method of determination, rock technology, applied in the direction of measuring devices, instruments, scientific instruments, etc.

Active Publication Date: 2013-03-13
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +2
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Problems solved by technology

[0009] So far, there is no satisfactory method for quantitatively determining the weathering rate of rocks

Method used

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Embodiment Construction

[0038] Taking the measurement process of the rock weathering velocity in the Wenchuan earthquake area as an example, the specific implementation methods will be described in detail with reference to the attached drawings for the test samples 1 and 2.

[0039] According to attached figure 1 First, select two sampling points with known rock rupture time: Sampling point 1 is the Wenchuan earthquake collapse body in Yuzixi, Sichuan. May 12, 2009; Sampling point 2 is the bedrock beside the Mianyuanhe highway in Sichuan. Through local surveys, it was determined that 1969 was the year when the bedrock on the side of the road was broken by the Mianyuan River road construction.

[0040] Collection of rock samples: The rock samples for test sample 1 were collected from the natural collapsed and accumulated rock blocks at the sampling site of the Wenchuan earthquake collapse body, and the lithology is fine-grained granite. It was determined through on-site observation that the edges an...

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Abstract

The invention provides a rock weathering speed measurement method. The rock weathering speed measurement method comprises the steps of firstly discovering microscopic weathering characteristics in the initial rock weathering stage, namely the natural phenomenon that microcracks formed in fracture planes after rock failure continuously extend in rocks, and definitely defining the starting and stopping points and the starting and stopping time of the rock weathering. As for microscopic weathering characteristics, the rock weathering speed measurement method can carry out quantitative measurement on the width of the microcracks (namely, the rock weathering depth) by adopting a microscopic observation technology, a camera shooting technology and an image processing technology, and solves the technological problem that the microscopic weathering characteristics are invisible to the naked eyes. The rock weathering speed measurement method can record the rock cracking time by utilizing human activity events or geological events, determine the starting time of the weathering, and solve the technical problem that the weathering simulation time is hard to prolong to more than ten years. The rock weathering speed measurement method has the advantages of easiness in operation and accuracy in measurement results.

Description

technical field [0001] The invention relates to a method for measuring the weathering speed of rocks, in particular to a method for measuring the weathering speed of rocks whose weathering depth is less than 5 mm. Background technique [0002] Rock weathering is the natural destruction of rock by external force, and it is a common natural phenomenon. The rock weathering rate is the irreversible damage depth caused by weathering to the rock per unit time. In areas with the same or similar climatic conditions and topographical conditions, the weathering speed of the same type of rock is the same or similar, and the weathering speed of different types of rocks can be different. Therefore, in different rock distribution areas and areas with different climatic conditions, due to the different rock weathering speeds, the landform evolution process and the formed landform types are also significantly different; the rock weathering process is the soil. The formation process, the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 王兆印何晓燕施文婧王旭昭李昌志任明磊姜晓明李辉张大伟
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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