Original state sampling method for constructed fractured rock mass

A rock mass and undisturbed technology, applied in the field of undisturbed sampling of structurally broken rock masses, can solve problems such as poor structural stability, difficulty in obtaining representative samples, and damage to the undisturbed structure of geological bodies, so as to enhance the sealing effect, expand the scope of application, and enhance the overall The effect of the consolidation effect

Active Publication Date: 2013-09-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an improved way to study underground rocks more accurately during exploration or other activities that require accurate data from observed holes. It involves placing special tools inside the well casings before excavating them, allowing scientists to easily see how they have been doing things like drill bites while still being able to sample important areas around their area. These techniques help reduce resource waste compared to traditional ways, making analysis faster than current means. Additionally, there may exist various embodiments described depending upon specific requirements and applications. Overall, these technical improvements improve understanding of sedimentary basin dynamics and provide valuable insights about natural environments.

Problems solved by technology

This patented technical solution involves finding suitable sample materials containing only those parts that are likely lost during excavations or drilling operations. These material can be used to study the mechanisms involved in shale formation processes at different stages throughout its lifecycle.

Method used

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  • Original state sampling method for constructed fractured rock mass
  • Original state sampling method for constructed fractured rock mass
  • Original state sampling method for constructed fractured rock mass

Examples

Experimental program
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Effect test

Embodiment 1

[0048] When the cracks at the bottom of the observation hole are sparsely distributed and tightly closed, rubber pads are used to block the bottom of the hole, and expansion and contraction air bags are used to block the opening of the observation hole.

[0049] The specific operation steps are to block the opening of the observation hole with the expansion and contraction air bag in the hole, seal the bottom of the observation hole with a rubber pad, inject glue on the high-pressure side wall, expand the hole and drill.

[0050] The first step is to select a suitable location containing enough feasible geological structures according to the degree of fragmentation of the rock mass to be taken and the geological terrain conditions, and use a drilling rig to drill a rock pillar with a diameter of about 6 cm and a height of 45 cm in the shallow layer of the surface, and take out the rock pillar. A small hole with a diameter of 6cm is reserved; the second step is to use the positi...

Embodiment 2

[0054] The distribution of fractures at the bottom of the observation hole is dense, and the geological structure is mostly concentrated at the bottom of the hole, while the distribution of fractures on the wall of the observation hole is relatively sparse. The plastic film is used to cling to the hole wall, and the expansion and contraction air bag is used to block the hole.

[0055] The specific operation steps are to use expansion and contraction air bags to block the hole, cover the hole wall with plastic film, inject glue at the bottom of the high-pressure hole and drill the hole.

[0056] The first step is to select a suitable location containing enough feasible geological structures according to the degree of fragmentation of the rock mass to be taken and the geological terrain conditions, and use a drilling rig to drill a rock pillar with a diameter of about 8 cm and a height of 45 cm in the shallow layer of the surface, and take out the rock pillar. Reserve an observa...

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Abstract

The invention relates to an original state sampling method for constructed fractured rock mass, which aims at solving the technical problems that the original state structure of the constructed fractured rock mass is easily damaged under disturbance of the conventional sampling appliance, and the representative sample required by indoor research of a microstructure for a key geological structure is difficult to acquire. According to the technical scheme, the method comprises the following steps: a. drilling an observation hole in a shallow surface layer on which a rock sample to be sampled is positioned by using a drilling machine; b. putting positioning and imaging equipment in the observation hole for acquiring the geological structure position and physical characteristic information of the hole wall gap in the observation hole; c. positioning and plugging hole sections with complete rock mass or containing sparse fractures only in the observation hole by employing the plugging guide equipment according to information in the step b; d. injecting the epoxy resin curing agent glue solution into a reserved section in the observation hole, so as to inject the glue solution to the preset position along the dense fractures or fractured gaps of the reserved section under impact of high-pressure gas; e. reaming or continuously drilling the indoor analytical rock samples after the glue solution wholly reaches the bonding strength.

Description

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Claims

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Application Information

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Owner NANJING UNIV
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