"Seal-open-seal"type seal sampling device and test
CHEN Shaojie
ZHOU Ting
HUANG Yuehui
XU Ameng
WANG Zhizheng
Abstract：Coal seam gas content is an important parameter for the prevention and control of gas disasters in mines and the development and utilization of gas resources.In order to solve the problems of serious sample mixing and large loss of gas content in underground direct method,a new type of"seal-open-seal"type sealed sampling device was developed,which is in the closed,open and sealed state before,during and after sam-pling,and the pressure resistance of sampling cylinder is not less than 1MPa after sealing,and the field test shows that the sealed sampling device is able to take crumbly coal samples to a maximum sampling depth of 70m.Field tests have shown that the sealed sampling device is capable of sampling crumbly coal samples up to a maximum sampling depth of 70 m.Compared with traditional drilling chip sampling,sealed sampling is more accurate in determining the gas content with high values,small loss of gas,and large desorption of actual gas.The sealed sampling device provides a new idea for the direct determination of gas content to realize deep hole sampling and reduce the exposure time of the sampling process.
Keywords：gas contentseal-open-sealreverse sealsampling devicespot sampling
Publication Date：2024-06-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )