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Laboratory simulation method for borehole gas drainage and test method for sealing performance of hole sealing materials

A technology for laboratory simulation and gas drainage, which is applied in the fields of gas discharge, earthwork drilling, measurement, etc., can solve the problems of high manpower and material resources and unsatisfactory test results

Active Publication Date: 2018-07-03
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Laboratory simulation method for borehole gas drainage and test method for sealing performance of hole sealing materials
  • Laboratory simulation method for borehole gas drainage and test method for sealing performance of hole sealing materials
  • Laboratory simulation method for borehole gas drainage and test method for sealing performance of hole sealing materials

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Embodiment Construction

[0088] Such as figure 1As shown, the borehole gas drainage laboratory simulation system of the present invention includes a borehole simulation pipe 7, a hole sealing grouting system, a gas pressure simulation loading system and a gas detector 24, and an acoustic emission system and an acoustic emission system. A connected computer 17; the two ends of the drilling simulation pipe 7 are provided with a plug simulation structure 8, and a section of the drilling simulation pipe 7 between the two plug simulation structures 8 is provided with a plurality of crack simulation holes on the pipe wall 1. A crack simulation tube 17 is connected to the crack simulation hole 1, and an air leakage detection switch 9 is connected to the crack simulation tube 17;

[0089] The sealing grouting system includes a grouting pipe 20 and a grouting pipe 6 extending into the drilling simulation pipe 7, and a grouting pump 23 connected with the grouting pipe 20; Grouting handle 22 and grouting pressu...

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Abstract

The invention discloses a method for simulating a borehole gas drainage laboratory, which comprises the following steps: 1. preparation in the early stage of the experiment; 2. prefabricating a plug simulation structure and forming a grouting space; 3. injecting grout into the borehole simulation pipe to simulate sealing hole, and the acoustic emission signal data used to study the crack plugging situation is collected by the acoustic emission system; four, test the negative pressure pumping ability; five, detect the influence of gas leakage at different positions of the drilling simulation pipe on the gas concentration of the drainage; the present invention Also disclosed is a method for testing the airtightness of the sealing material, including the steps: 1. Preparation in the early stage of the experiment; 2. Prefabricating the plug simulation structure and forming a grouting space; 3. Injecting the sealing material into the drilling simulation pipe and observing the cracks Blockage; 4. Test the negative pressure capacity. The invention can truly simulate on-site conditions, requires less manpower and material resources for experiments, has good experiment effects, high accuracy of experiment results, and strong practicability.

Description

technical field [0001] The invention belongs to the technical field of borehole gas drainage, and in particular relates to a laboratory simulation method for borehole gas drainage and a method for testing the airtightness of sealing materials. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00E21F17/18E21B47/00
Inventor 张天军蒋兴科包若羽张磊宋爽陈佳伟葛迪周敖赵云红范亚飞
Owner XIAN UNIV OF SCI & TECH
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