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Roadway support method for preventing rock burst

A roadway support and rockburst technology, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve the problem that the support body is easy to be crushed, fractured and broken, the overall large deformation of the anchor body, and the support process To reduce the engineering volume of roadway support, simplify the production and enhance the effect of support

Inactive Publication Date: 2015-05-13
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0003] In the prior art, three support methods are mainly used for roadway support: the first is passive rigid support, such as the composite support technology of masonry, U-shaped steel fully enclosed bracket and shed and then sprayed grout, but in the ground pressure When the impact force is large, the support body is easy to be crushed, fractured and broken; the second is to use composite support technologies such as anchor rods, anchor cables, mesh and shotcrete, and superficial surrounding rock grouting. Under stress conditions, this kind of anchor will have a large overall deformation, and even break the anchor rod and anchor cable, resulting in accidents; the third is to first let the pressure deform, release part of the stress, and then carry out the anchor rod, anchor cable, mesh, steel belt, and sprayed concrete Composite support, or use brackets, masonry to reserve deformation or cushion, or use large-deformation anchor cables, but this support method needs to take measures to relieve pressure in advance, the amount of work is large, and the support process is relatively complicated

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  • Roadway support method for preventing rock burst
  • Roadway support method for preventing rock burst
  • Roadway support method for preventing rock burst

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing.

[0032] A roadway support method for preventing rock burst, comprising the following steps:

[0033] a. According to the mine seismic signals of different energy levels measured in the mine, the vibration frequency range of the coal mine underground is obtained; the vibration frequency range of the coal mine underground is measured by the microseismic monitoring system. Microseismic monitoring is to monitor the vibration generated by the deformation and rupture of rock mass, automatically record and save the waveform data of the microseismic time to obtain the vibration frequency downhole. The microseismic monitoring system is mainly divided into three parts, namely sensors, data collectors, time synchronization, data communication, and servers. The sensor converts formation motion (formation velocity or acceleration) into a measurable electrical signal. Non-seismic sensor...

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Abstract

The invention discloses a roadway support method for preventing rock burst. The roadway support method includes the following steps that a, according to mine vibration signals measured under a coal mine and located at different energy levels, the vibration frequency range under the coal mine is obtained; b, metamaterial energy-absorbing slabs are manufactured, and the wave-absorbing frequency band of the slabs is within the mine vibration frequency range; c, a roadway is excavated according to the shape of a roadway section, anchor rod drilling holes are drilled in a hanging arch range, and the metamaterial energy-absorbing slabs are anchored to a roof and a lane side of the roadway through anchor rods. By means of the wave-absorbing performance of a metamaterial, shock waves of rock burst can be absorbed actively, and the intensity of rock burst is relieved, so that the support effect is enhanced, and the safety protection coefficient of workers under the mine is increased.

Description

technical field [0001] The invention relates to a roadway support method for preventing rock burst, in particular to a roadway support method using energy-absorbing materials. Background technique [0002] With the increase of coal mining depth and the expansion of mining range, the phenomenon of underground rock burst is becoming more and more serious. The phenomenon of rock burst occurs because the pressure in the coal rock mass exceeds the strength limit of the coal rock mass, and the energy accumulated in the coal rock mass around the roadway or stope is released suddenly, and an explosive accident occurs in the mine roadway, and the power throws the coal rock It is a kind of mine earthquake induced by mining, which not only causes damage to shafts, casualties, and damage to buildings on the ground, but also causes gas, coal dust explosions and floods, which interferes with the ventilation system and seriously threatens coal mines. production safety. [0003] In the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00
CPCE21D11/00E21D20/003
Inventor 陆菜平刘洋刘广建张农
Owner CHINA UNIV OF MINING & TECH
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