Drill hole gas extraction laboratory simulation system and method

Abstract

The invention discloses a drill hole gas extraction laboratory simulation system which comprises a drill hole simulation pipe, a hole sealing slip casting system, a gas pressure simulation loading system, a gas detector, a sound emission system and a computer; the two ends inside the drill hole simulation pipe are provided with plug simulation structures, a plurality of crack simulation holes areformed in the wall of the drill hole simulation pipe, a crack simulation pipe is connected to each crack simulation hole, and a gas leakage detection switch is connected to each crack simulation pipe;the hole sealing slip casting system comprises a slip casting pipe, a slip returning pipe, a slip casting handle and a slip casting pressure gauge; the gas pressure simulation loading system comprises a vacuum pump, a gas tank, a vacuum pressure gauge, a vacuumizing switch, a gas tank switch, a gas pressure gauge and a gas extraction switch. The invention further discloses a drill hole gas extraction laboratory simulation method and a hole sealing material sealing performance testing method. The on-site situation can be truly simulated, little manpower and material resources consumed by experiments are consumed, the experiment effect is good, the experiment result accuracy is high, and practicability is high.

Description

technical field [0001] The invention belongs to the technical field of borehole gas drainage, and in particular relates to a laboratory simulation system and method for borehole gas drainage. Background technique [0002] In most areas of my country, coal seams have high gas content, high pressure, low coal seam permeability, and complex geological structure conditions. The gas disaster is one of the main disasters in my country's coal mines, which poses a serious threat to the safe production of the mine, and the sealing effect of the borehole directly affects the gas drainage effect and the effective drainage radius of the borehole. More than 80% of the air in the system is inhaled through boreholes. If the inhaled air volume of the boreholes is reduced by 1 / 2 to 1 / 3, the gas flow rate in the boreholes can be increased by 1.5 to 2 times. Therefore, the sealing effect directly affects the gas extraction effect. During the process of gas drainage drilling and sealing, since...

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Problems solved by technology

At present, most of these tests are carried out on site, and there are relatively few laboratories that can carry out such tests, and the underground is limited by some conditions and various factors, the test results are not satisfactory, and the manpower and material resources are also high

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