Coal rheology seepage flow test device

High-pressure gas coal breaking experimental device

The invention discloses a high-pressure gas coal breaking experimental device. A piston column 2 is arranged above a sample test cylinder 1; two blast holes are symmetrical formed in the wall of the sample test cylinder 1; burst pieces 3 are arranged in the two blast holes; the blast holes are sealed by the burst pieces 3; a temperature detection hole and a pressure detection hole are also formed in the wall of the sample test cylinder 1; a temperature sensor 4 is arranged in the temperature detection hole; a pressure sensor 5 is arranged in the pressure detection hole; a gas pipeline 12 is arranged in the wall of the sample test cylinder 1; one end of the gas pipeline 12 stretches into an inner cavity 1a, and the other end of the gas pipeline 12 is connected with a high-pressure gas tank 6 outside the sample test cylinder 1. The burst pieces which can be damaged by high-pressure gas serve as tools for instantaneous pressure relief, a sample damage state and the temperature and pressure ...

-Simulation test device of mine waste reservoir with adjustable gradient

The invention discloses a simulation test device of a mine waste reservoir with adjustable gradient. The simulation test device is provided with a simulation reservoir area, wherein a dam reservoir of the simulation reservoir area is connected with a simulation cleugh. The simulation test device is characterized in that a jacking push rod is arranged at the bottom of the simulation reservoir area positioned at the reservoir tail and arranged on a hydraulic cylinder; a reservoir dam rotating shaft is arranged at the bottom of the simulation reservoir area positioned at the dam reservoir; the simulation reservoir area is articulated on a base of the reservoir through the reservoir dam rotating shaft; the simulation cleugh is formed by at least two grooves end to end in sequence, wherein the first end of a first section of groove is arranged on the base of the reservoir; and adjacent grooves are connected by an adjustable joint. The invention has the remarkable advantages of strong compatibility ...

Adsorption-expansion deformation optical measuring instrument of coal rock gas

The invention discloses an adsorption-expansion deformation optical measuring instrument of a coal rock gas. A heater and a base are arranged inside an experimental cylinder; a lateral support body is fixed at the rear end of the base; a loading plate is arranged at the front end of the base and is fixed with the rear end of a pressure rod; the front end of the pressure rod is connected with a lever device outside the experimental cylinder; an exhaust sub-system is connected with a bleeder hole in the wall of the experiment cylinder externally; an aeration sub-system is connected with an aeration hole externally; an opening at the upper end of the experiment cylinder is sealed by a seal cover; a transparent lens is embedded in the middle part of the seal cover; an observation device is arranged just above the transparent lens. According to the adsorption-expansion deformation optical measuring instrument of the coal rock gas, the expansion and shrinkage effect and the gas seepage characteristics ...

Rock plane strain instrument

Coal rheology seepage flow test device

A rheological and seepage test device of coal and rock is used for rheological test and seepage test in rheological process for coal and medium-soft rocks. The device is characterized in that a centering device is arranged in a pressure chamber of a rheological test device; the centering device includes an upper centering disk and a lower centering disk, which are connected with each other through a positioning screw; round holes are respectively provided at the centers of the upper centering disk and the lower centering disk; an upper pressing block and a lower pressing block are respectively arranged in the round holes of the upper centering disk and the lower centering disk; gaskets are provided between any two of the upper pressing block, the lower pressing block and a rubber sheath; a first air channel penetrating through the gasket vertically is provided on the gasket; and the gasket is connected with the rubber sheath and the end portion of corresponding pressing block at both ends ...

Method of determining Y-shaped ventilation goaf gas enrichment region

The invention discloses a method of determining a Y-shaped ventilation goaf gas enrichment region and belongs to the field of gas extraction. According to the method, the permeability and the porosity of a mining fissure field are dynamically calculated in real time, the positioning of the Y-shaped ventilation goaf gas enrichment region is more accurate, and more pointed guidance can be provided for the arrangement of drill holes in the gas extraction; the gas emission quantities of different regions are considered according to different working environments, and the comprehensiveness of the positioning of the Y-shaped ventilation goaf gas enrichment region is further improved.

Simulation test device of mine waste reservoir with adjustable gradient

The invention discloses a simulation test device of a mine waste reservoir with adjustable gradient. The simulation test device is provided with a simulation reservoir area, wherein a dam reservoir of the simulation reservoir area is connected with a simulation cleugh. The simulation test device is characterized in that a jacking push rod is arranged at the bottom of the simulation reservoir areapositioned at the reservoir tail and arranged on a hydraulic cylinder; a reservoir dam rotating shaft is arranged at the bottom of the simulation reservoir area positioned at the dam reservoir; the simulation reservoir area is articulated on a base of the reservoir through the reservoir dam rotating shaft; the simulation cleugh is formed by at least two grooves end to end in sequence, wherein thefirst end of a first section of groove is arranged on the base of the reservoir; and adjacent grooves are connected by an adjustable joint. The invention has the remarkable advantages of strong compatibility ...

Rock plane strain instrument

Method for confirming stress distribution for Y-shaped ventilation gob stratum

The invention discloses a method for confirming stress distribution for Y-shaped ventilation gob stratum, and the method belongs to the gas extraction field, the method comprises the steps of doing the coal containing methane heat-fluid-solid coupling triaxial seepage test according to the working conditions on site to obtain the permeability of the coal sample during the stress-strain process, building the active volume stress intensity equation for coal, the coal stress balanced equation, geometric equation for coal containing methane and elastoplastic constitutive equation, importing the Comsol Multiphysics system and inputting the corresponding stratum material parameter to obtain the stress distribution result of the stratum through the iterative operation. The method can measure the stress distribution of the stratum for the Y-shaped ventilation gob more accurately, locate the enrichment region for Y-shaped ventilation gob more accurately and provide more specific guide for the drilling ...

High-pressure gas annularly-symmetrical and instant pressure relief coal rupturing experiment device

The invention discloses a high-pressure gas annularly-symmetrical and instant pressure relief coal rupturing experiment device. The high-pressure gas annularly-symmetrical and instant pressure relief coal rupturing experiment device comprises a testing cylinder, wherein a testing chamber is formed at the upper part of the testing cylinder; a cover body into which a piston rod is inserted is fixedly arranged on the testing cylinder; four pressure relief holes which are uniformly formed in the peripheral direction are further formed in the testing cylinder; the pressure relief holes are externally connected with a pressure relief channel composed of a straight-line section, a large circular arc section and four small circular arc sections; a rupture disk is mounted at one end of the straight-line section and the other end of the straight-line section is connected with the middle of the large circular arc section; the small circular arc sections are connected with the two ends of the large ...

Coal pillar-free exploitation Y-shaped venting goaf drilling hole location method

The invention discloses a coal pillar-free exploitation Y-shaped venting goaf drilling hole location method and belongs to the field of gas extraction. Drilling hole location is performed according to a gob-side entry retaining Y-shaped goaf gas moving law and a gas enrichment area, so the gas extraction effect is good, an extraction drilling hole penetrates through a caving zone and a fault zone in sequence to reach the lower part of a curved sinking zone, the problem of accurate positioning of the gas extraction holes of overlaying strata structures of different coal measure stratas is solved, and the gas extraction effects are ensured. As massive pressure-relieving gas and the goaf gas are extracted, the problems of upper corner gas ultralimit and return air gas ultralimit are fundamentally solved, and the safety production of a mine is ensured. Meanwhile, under the premise of ensuring the extraction effects, the drilling hole location method is strongly targeted at the gas enrich area ...