A device and method for simultaneous measurement of coal rock adsorption deformation and porosity

Abstract

The invention belongs to the technical field of safety in coal mines and relates to a coal rock adsorption deformation and porosity synchronous measurement device and a coal rock adsorption deformation and porosity synchronous measurement method. A strain sensor and a first solidified gas pressure sensor at the upper end of an adsorption tank are connected onto a multipath signal conditioner through a wire, a gas reducing valve and a second solidified gas pressure sensor are fixedly installed on a high pressure gas cylinder, the second solidified gas pressure sensor is connected onto the multipath signal conditioner through a wire, a pipeline on the high pressure gas cylinder is connected with a standard cylinder, a second mass flowmeter is installed on the pipeline, a rotating platform is installed below the adsorption tank, an X-ray source and a ray detector that are right opposite to the adsorption tank are fixedly installed in a constant temperature air bath installed outside the adsorption tank, a data acquisition and analysis system is installed on the ray detector, a first mass flowmeter and a vacuum degassing pump are connected onto a pipeline on the adsorption tank, a degassing control valve and a vacuum thermocouple meter are fixedly installed on the vacuum degassing pump, and the problem that the adsorption deformation and the porosity of a coal sample cannot be measured synchronously in the process of measurement of the adsorbed gas flow of the coal rock is solved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and relates to a device and method for synchronously measuring adsorption deformation and porosity of coal rocks. Background technique [0002] Coal mine gas (also known as "coalbed methane") is an unconventional natural gas that exists in the coal seam and its surrounding rocks, exists in an adsorbed or free state, and mainly consists of methane. my country is rich in coalbed methane resources. According to a new round of resource evaluation, my country's coalbed methane resources at depths below 2,000 meters are about 36.81 trillion cubic meters, equivalent to 49 billion tons of standard coal, ranking third in the world. However, the reality that cannot be ignored in the current development of my country's coalbed methane development industry is that the gas production of a single coalbed methane well is too low, the economic benefits are low, and the industry is facing difficulties. ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a device and method for synchronously measuring adsorption deformation and porosity of coal samples in order to solve the problem that coal sample adsorption deformation and porosity cannot be measured simultaneously in the process of measuring the amount of gas absorbed by coal rock

Images