Coal-rock mass ground stress continuous testing device and method thereof

A testing device and ground stress technology, which is applied in the measurement of hydraulic/pneumatic force, etc., can solve the problems of poor initial adaptability, achieve real-time testing, good active coupling, and reduce testing workload

Active Publication Date: 2009-08-26
CHINA UNIV OF MINING & TECH +1
View PDF1 Cites 56 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot be achieved The sensor is completely in close contact with the coal and rock mass at the beginning, and the initia

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coal-rock mass ground stress continuous testing device and method thereof
  • Coal-rock mass ground stress continuous testing device and method thereof
  • Coal-rock mass ground stress continuous testing device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] The present invention is mainly composed of three parts: an in-situ stress sensor, a data acquisition instrument and a high-pressure oil pump, which will be described separately below.

[0062] (1) Ground stress sensor

[0063] The ground stress sensor is composed of a pre-capsule pressure sensor 1, a high-pressure oil pipe 2, a tee 3, an electronic digital display hydraulic sensor 4, a valve 5 and a quick-change joint 6; the diameter of the capsule pressure sensor 1 is φ39-100mm, and the total length is L 1 110~400mm, sensing part L 2 Length 70~320mm; high pressure oil pipe 2 length L 3 0-50m, depending on site requirements; the electronic digital display hydraulic sensor 4 can be connected to the substation of the existing coal mine safety monitoring system, and transmit the data to the ground monitoring host computer in real time, and then to each terminal computer; the valve 5 For shut-off valve.

[0064] a. Capsule pressure sensor 1 adopts high-pressure expansio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a coal-rock mass ground stress continuous testing device and a method thereof which are mainly used for testing the stress and change regularity of rock in place or crushed coal-rock mass. The device consists of a ground stress sensor, a data acquisition instrument and a high pressure oil pump, which can work separately and can be connected with the data acquisition instrument to work. The ground stress sensor consists of a preposing capsule pressure sensor (1), a high-pressure oil tube (2), a tee (3), an electronic digital display hydraulic sensor (4), a valve (5) and a quick change coupler (6); wherein, the capsule pressure sensor is arranged inside a borehole, and can be well coupled with the coal-rock mass by injecting oil liquid; the ground stress testing results can be directly displayed on a pressure gauge; the sensor can be directly connected with a coal mine safety monitoring system, or the data can be acquired by the data acquisition instrument for remote data transmission, or telephone wires can be used for the communication between the sensor and ground modem as well as a computer; in ground-based computer software, the ground stress data and the change regularity thereof can be looked over.

Description

technical field [0001] The invention relates to monitoring the size of the ground stress of coal and rock mass and the variation law of the ground stress of coal and rock mass with mining and roof activity, and belongs to the technical field of mine ground stress monitoring. Background technique [0002] In-situ stress refers to the stress on the underground coal strata, mainly including the self-gravity stress caused by the self-weight of the overlying strata and the tectonic stress caused by the geological structure. Self-weight stress σ v =γZ, γ is the specific gravity of the overlying coal strata, and Z is the vertical depth. [0003] During the underground mining of coal and other resources, mining activities destroy the original stress balance state of coal and rock, causing stress redistribution around the mining space. Therefore, the stress of coal and rock mass around the mining space also includes the mining stress. Around the stope and mining roadway, due to th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01L1/02
Inventor 王恩元徐文全颜丙沂
Owner CHINA UNIV OF MINING & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap