A simulation test device and method for multi-angle inclined drilling and grouting process of coal seam floor under the action of pressure and dynamic water

A coal seam floor and inclined drilling technology, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., can solve the problems of difficult control of high-pressure water flow expansion, large number of long boreholes, and difficult sealing, etc., to achieve The effects of solving visualization problems, solving water erosion, and solving sealing problems
CN109441441BActive Publication Date: 2022-02-22NORTH CHINA INST OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTH CHINA INST OF SCI & TECH
Publication Date
2022-02-22

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Abstract

The invention discloses a simulation test device and method for the multi-angle inclined drilling and grouting process of coal seam floor under the action of pressure dynamic water. Aperture crack simulation device and grouting device, wherein: the test bench is used to support multi-angle drilling and different aperture crack simulation devices; multi-angle drilling and different aperture crack simulation devices are divided into multiple groups according to the drilling angle and crack size; The water source application device for the confined aquifer includes a constant pressure water pump, water pressure regulating valve, control valve and flow meter for open and closed fissures; the grouting device includes a grouting machine, safety valve, grout flushing valve, grouting channel valve, grouting Orifice selector switch and no-disassembly flush valve. The device of the invention can realize the flow simulation of the grouting process layout, the dynamic process simulation from slurry flow to diffusion, the simulation of the effect of the inclination angle of the borehole on the slurry diffusion, and the scenario simulation of the precipitation and coagulation mechanism.
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Description

technical field

[0001] The invention relates to a simulated experiment device for porous multi-inclination angle combined grouting technology based on the grouting hole arrangement technology. Background technique

[0002] In the process of coal mining, the coal seam is seriously threatened by the confined water in the floor aquifer, and the water inrush coefficient is high. How to prevent the floor from the confined water inrush is an important problem to ensure the safe production of the working face. In particular, some aquifers with sufficient water sources but difficult to drain seriously affect mine production; the key to on-site implementation is often to choose floor grouting projects. At present, the grouting diffusion radius theory is an empirical formula recognized by industry experts, and is widely used in mine grouting engineering. However, the grouting process and grouting mechanism of multiple boreholes in deeper layers still need to be studied. For example,...

Claims

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