Loaded gas-containing coal body simulation drilling and multi-parameter while-drilling monitoring test system

Abstract

The invention provides a loaded gas-containing coal body simulation drilling and multi-parameter while-drilling monitoring test system which comprises a supporting frame, a sealing frame, a high ground stress intelligent control loading unit, a gas source intelligent supply unit, a multi-parameter monitoring record analysis unit and a drilling machine. The test system can truly simulate the drilling process of a deep coal seam under the conditions of high ground stress, high gas pressure and complex geological structures; meanwhile, the test system is used for measuring related parameters, specifically including the drilling rate of a drill rod, the torque of a drilling machine, the drilling speed of a drill bit, the axial pressure, a vibration signal, the drilling depth, an acoustic emission signal, the drilling gas emission amount, the gas pressure and the like; and laws and internal mathematical relationships among geological occurrence conditions, coal seam mechanical property changes, gas content pressure changes and related parameter changes are mastered through tests.

Description

technical field [0001] The invention relates to the technical field of mine gas prevention and control, in particular to a simulated drilling and multi-parameter monitoring-while-drilling test system for a loaded gas-containing coal body. Background technique [0002] Coal and gas outburst prediction is the primary link in the outburst prevention work. The accuracy of the prediction results directly determines the safety of the coal seam and the scientificity of the outburst prevention measures. Due to the limitation of the measurement method, the current prediction results cannot continuously reflect the mining work ahead of time. Changes in the properties of coal and rock mass and gas occurrence state in front of the front. [0003] Outburst prediction requires the construction of a large number of boreholes. The drilling process of these boreholes can obtain a large amount of effective information reflecting the risk of coal outburst. It can be considered that the drillin...

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Problems solved by technology

[0006] 1. The test system for simulating gas-bearing coal seams does not consider the real geological structure changes (such as faults, folds, etc.) and coal structure changes (such as soft stratification) of coal seam occurrence, and can only simulate gas-bearing coal seams with relatively stable occurrence conditions. coal seam;

[0007] 2. The simulated drilling test system is mainly used for research related to tunnel construction, and the test system does not design modules related to gas

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