A method of simulating a complex natural crack structure in coal rock

A technology of natural fractures and coal rock mass, which is applied in the field of simulating the complex natural fracture structure of coal rock mass, can solve the problems that the research on natural fractures has not yet formed a system, the depth of coal rock mass occurrence is large, and the raw coal collection is difficult, so as to achieve the reduction of raw coal The difficulty of collection, the saving of manpower, material and financial resources, and the effect of saving collection

Inactive Publication Date: 2017-03-15
HENAN POLYTECHNIC UNIV
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Problems solved by technology

Due to the deep occurrence of coal and rock mass, the collection of raw coal is difficult, time-consuming and labor-intensive, so the research on natural fractures has not yet formed a system

Method used

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Embodiment Construction

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention are described in further detail below. A method for simulating complex natural fracture structures in coal and rock bodies, comprising molds for forming test pieces, cement, gypsum, coal powder, water, buckets, refrigerators, and planks, including the following steps:

[0017] (1) Assemble the mold of the test piece on the ground to ensure that the connection of the mold is tight;

[0018] (2) Apply the engine oil evenly to the inner surface of the mold with a brush;

[0019] (3) Stir cement, gypsum, coal powder, and water in a bucket according to a specific ratio;

[0020] (4) Pour the mixture into the mold of the forming test piece at a fast speed to prevent the mixture from agglomerating;

[0021] (5) According to the structure of natural cracks in the actual coal reservoir, use water to form ice cubes of different sh...

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Abstract

A method of simulating a complex natural crack structure in coal rock is disclosed. The method is characterized in that the method includes a specimen molding mold, cement, gypsum, coal powder, water, a bucket, a refrigerator and a board, the water is prepared into ice blocks having different shapes through the refrigerator in advance to simulate the natural crack structure in a coal reservoir stratum, then the specimen molding mold is assembled on the ground, the cement, the gypsum, the coal powder and the water are fully stirred in the bucket according to a certain ratio, and poured into the specimen molding mold, the ice blocks play a role of simulating the structure of the natural cracks in the practical coal reservoir stratum through addition of the ice blocks into concrete according to the structure of the natural cracks in the practical coal reservoir stratum in a specimen molding process, the method has characteristics of simple, convenient and easy operation, and capability of saving time and labor, and the method can greatly reduce the working load of raw coal collection on site and provides a raw material for a hydrofracture test.

Description

technical field [0001] The invention relates to a method for simulating complex natural fracture structures in coal and rock bodies. Background technique [0002] Coalbed methane has the advantages of high calorific value and no pollution. It is a high-quality and clean new energy that can be widely used as residential fuel, chemical raw material, power generation fuel, and industrial fuel. Towards the stage of development and utilization. The occurrence of coalbed methane in my country has the characteristics of heterogeneity, low pressure, low permeability and low saturation. A large amount of coalbed methane is adsorbed on coal, and natural cracks in coalbeds are usually saturated with water, so the mining method of coalbed methane is doomed Different from the exploitation of ordinary natural gas and shale gas, certain anti-permeability measures are needed to improve the conductivity of coalbed methane in coal reservoirs, change the permeability of coal reservoirs, and pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N1/36G01N1/42
CPCG01N3/12G01N1/36G01N1/42G01N2001/366
Inventor 张帆马耕李睿
Owner HENAN POLYTECHNIC UNIV
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