Coal seam drilling pressure relief indoor simulation test system and method
A simulation test system, drilling pressure relief technology, applied in earthwork drilling, wellbore/well components, measurement, etc. Problems such as difficulty in sample preparation, to achieve the effect of low cost, universality, and ease of large-scale production
Pending Publication Date: 2022-07-26
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
On the other hand, due to the difficulty in preparing large-scale coal and rock samples, it is difficult to carry out more comprehensive coal and rock drilling pressure relief tests in the laboratory.
The above deficiencies have resulted in insufficient research on the mechanism of drilling pressure relief in surrounding rocks, optimization of drilling parameters, and evaluation methods for drilling pressure relief effects.
The main reason is the lack of effective drilling and pressure relief indoor experimental equipment and methods
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[0073] An indoor simulation test system for coal seam drilling and pressure relief, comprising a mechanical loading device 1, a drilling device, and an external monitoring device. The mechanical loading device 1 is an indoor mechanical testing machine, that is, a commonly used uniaxial and biaxial compression mechanical testing machine. The drilling device includes a rigid block 2, a carrier frame, a drilling machine 4, a gear, a rack transmission mechanism, and the like. The carrier frame is composed of a steel plate 3 , a rack, and a vertically retractable bracket 10 . The gear and rack transmission mechanism is divided into a longitudinal rack and pinion transmission mechanism 28 , a transverse rack and pinion transmission mechanism 29 and a vertical rack and pinion transmission mechanism 30 according to different traveling directions and functions. The longitudinal rack and pinion transmission mechanism 28 is composed of racks, gears 5, bearings, servo motors 7, gear slee...
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The invention belongs to the field of geotechnical engineering indoor tests, and relates to a coal seam drilling pressure relief indoor simulation test system and method, and the system comprises a mechanical loading device, a drilling device, and an external monitoring device. And the mechanical loading device is an indoor mechanical testing machine. The drilling device is composed of a rigid cushion block, a bearing frame, a drilling machine, a gear and rack transmission mechanism and the like. The external monitoring device is a DIC high-speed camera system. The test method comprises the following steps: (1) preparing a raw coal sample and measuring the uniaxial compressive strength; (2) preparing a coal-rock-like material sample and calibrating the strength; (3) arranging a test system; (4) applying axial loads with different levels to the sample in advance; (4) the axial load is maintained, and drilling is carried out; (5) continuously loading by the testing machine until the sample is damaged; (6) sorting test data; and (7) evaluating the drilling pressure relief effect. The device and the method can be used for testing and researching a deep surrounding rock drilling pressure relief mechanism, drilling parameter optimization design, pressure relief effect evaluation, drilling pressure relief opportunity and other problems.
Description
technical field [0001] The invention belongs to the technical field of indoor test of geotechnical engineering, and more particularly relates to an indoor simulation test system and method for pressure relief of coal seam drilling. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] With the increase of mining depth and mining intensity of coal resources, the frequency and intensity of dynamic disasters such as coal mine rock bursts are increasing, which seriously threatens the safety of coal mine production. The occurrence of rock burst is closely related to the stress state of the coal and rock mass. Its essence is that the coal rock mass reaches the ultimate bearing capac...
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IPC IPC(8): E21B49/00E21B47/00
CPCE21B49/00E21B47/00
Inventor 赵武胜秦长坤陈卫忠钟坤高厚
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI